A method for bonding together components, such as a tip and a shaft which include mutually facing carbide end surfaces. The tip includes circumferentially spaced flutes formed in its cylindrical outer periphery. The shaft has a cylindrical outer periphery and a plurality of coolant holes extending through the shaft. Bonding of the tip to the shaft is performed by inserting gauge wires into the coolant holes and associated flutes, and positioning brazing material between the first and second end surfaces. A water-soluble bond-blocking material is applied to the gauge wires for preventing brazing of the gauge wires to the brazing material. The brazing material is heated to braze the first and second end surfaces together while the flutes and their associated coolant holes are maintained in alignment by the gauge wires. Then, the gauge wires are removed, and residual bond-blocking material is dissolved in water.

A method of manufacturing a roller cone drill bit may include forming a body of a single piece having an upper end and a lower end; machining at the lower end of the body at least two journals extending downward and radially outward from a central axis of the body; machining at least one of a ball passage, a hydraulic fluid passageway, a grease reservoir, and a lubricant passageway; and mounting roller cones on the at least two journals.

A superabrasive compact (e.g., a polycrystalline diamond compact) including a substrate pre-coated with at least one braze layer and an in-process drill bit assembly including at least one of such superabrasive compacts are disclosed. Pre-coating the substrate with at least one braze layer and dimensioning the pre-coated substrate to fit within the tolerances of a conventionally-sized cutter recess of a drill bit body enables a drill bit manufacture to easily and rapidly braze the disclosed superabrasive compacts into the conventionally-sized cutter recess without substantially decreasing the superabrasive volume of the superabrasive compact.

A method of thermo-mechanically processing a preform composed of tool steel and a tool to modify a workpiece. The preform has a region containing austenite. The method comprises establishing the region at a process temperature between a martensitic start temperature and a stable austenitic temperature. While at the process temperature, the region is deformed to change an outer dimension and to modify the microstructure to a depth of 1 millimeter or more. The tool comprises a member composed of tool steel. The member includes a first region that extends from the outer surface to a depth of greater than 1 millimeter and a second region. The first region includes a plurality of grains having an average misorientation angle greater than about 34°, an average grain size that is at least 10% smaller than the second region, and has a different grain orientation than the second region.

Earth-boring drill bits include a bit body, an element having an attachment feature bonded to the bit body, and a shank assembly. Methods for assembling an earth-boring rotary drill bit include bonding a threaded element to the bit body of a drill bit and engaging the shank assembly to the threaded element. A nozzle assembly for an earth-boring rotary drill bit may include a cylindrical sleeve having a threaded surface and a threaded nozzle disposed at least partially in the cylindrical sleeve and engaged therewith. Methods of forming an earth-boring drill bit include providing a nozzle assembly including a tubular sleeve and nozzle at least partially within a nozzle port of a bit body.

An apparatus and method for manufacturing a downhole tool that reduces failures occurring along a bondline between a cemented matrix coupled around a blank. The cemented matrix material is formed from a powder and a binder material. The blank includes an internal blank component and a coating coupled around at least a portion of the surface of the internal blank component. The internal blank component includes a top portion and a bottom portion. The internal blank component is substantially cylindrically shaped and defines a channel extending through the top portion and the bottom portion. The coating is a metal in some exemplary embodiments. The coating reduces the migration of the binder material into the blank thereby allowing the control of intermetallic compounds thickness within the bondline.

Razors are described herein. In some instances the razors include a safety razor blade unit that includes a guard, a cap, and at least two blades with parallel sharpened edges located between the guard and cap. A first blade defines a blade edge nearer the guard and a second blade defines a blade edge nearer the cap. The first blade has a cutter force greater than the cutter force of the second blade. In some instances the razors provide a comfortable shave having improved closeness.

A blank may include a tang section, a base section, and an angled section with a recess. The tang section may have an outer surface with an outer diameter. The base section may have an outer surface with a diameter greater than the outer diameter of the tang section. The angled section may lie between the tang section and the base section and may have an outer surface that transitions in diameter from the outer diameter of the tang section to the outer diameter of the base section. The recess in the angled section may be shaped to engage a tip of a former.

A method for manufacturing a bandsaw blade provided at the top of the teeth with cutting tips made of a hard material, includes the steps of: offsetting to the left and right saw teeth constituting left and right offset teeth; forming the saw teeth constituting the left and right offset teeth to a smaller tooth height than that of the saw teeth constituting straight teeth; and grinding cutting tips provided to the top of the left and right offset teeth subsequent to the offsetting step, and machining the edge lines at the top of the left and right offset teeth so that the lines are orthogonal to the travel direction of a bandsaw blade and the cutting direction of the bandsaw blade.

A blade sharpening system using the interior surface of a grinding wheel against which a blade is drawn along its entire length for sharpening. The sharpening system includes a blade holding configuration having multiple hinged arms. A cam operating between two of the hinged arms serves to alter the angle of incidence between the blade and the grinding wheel as the blade is drawn across the grinding wheel. The result is that a wide variety of different blade configurations can be easily accommodated by the sharpening system.

A multi-rod hand-held sharpener includes a handle with an outer grip surface for a hand of a user, a first abrasive rod having a first outer abrasive surface with a first abrasiveness level, and a second abrasive rod having a second outer abrasive surface with a second abrasiveness level different from the first abrasiveness level. At least one guide surface extends toward the first sharpening surface at a selected guide angle non-orthogonal to the first sharpening surface. The user contactingly engages a side of the tool against the guide surface and a cutting edge of the tool against the first abrasive surface, and then advances the side of the tool away from the guide surface and the cutting edge against the first abrasive surface while maintaining the tool at the selected guide angle. An optional second guide adjacent the second abrasive surface at a different angle facilitates micro-beveling.

An elliptical climbing exercise apparatus includes a base frame, a swing unit including a pair of swing arms, a pedal unit including a pair of pedal shafts respectively pivotally connected to the swing arms, a damping unit including a rotating wheel with a spindle, a guiding unit including a pair of cranks respectively affixed to the two opposite ends of the spindle, a pair of rockers respectively pivotally connected to the cranks and a pair of links respectively pivotally connected to the rocker. Cooperation between the base frame, the swing unit, the pedal unit, the resistance unit and the guiding unit is used to achieve a training of the leg muscles.

An exercise device, comprising: more than one resistance adjusting inserts wherein said resistance adjusting inserts are selected to change the overall resistance a user exercises against; a chamber wherein one or more of said resistance adjusting inserts are capable of being inserted within said chamber; and an inlet to said chamber wherein the one or more of said resistance adjusting inserts are movable within the chamber by breath of a user. A method for exercising comprising: using an exercise device comprising a chamber capable of holding at least one resistance adjusting insert where the chamber has an inlet; selecting at least one resistance adjusting inserts from more than one resistance adjusting inserts; and, moving the selected inserts in the chamber by air pressure generated by a user directed through an inlet into the chamber.

In one example, a muscle exercise device includes a first arm, and a second arm rotatably connected to the first arm, and the second arm and first arm are movable to cooperatively define a recess. The muscle exercise device also includes a resistance element configured to reside in the recess and be compressed between the arms.

A stationary strength training equipment includes a frame assembly, a lockable bilateral user interface installed on the frame assembly, a balancing structure connected to the lockable bilateral user interface, a plurality of user selectable weights supported by the frame assembly and connected to the balancing structure, a load detecting strain gauge disposed on the user selectable weights to detect a weight of the user selectable weights being lifted, and an informing device connected to the lockable bilateral user interface to detect and show a warning signal to a user. The lockable bilateral user interface further includes a locking mechanism assembly and a central pivot assembly; the balancing structure is able to rotate along the central pivot assembly, and the locking mechanism assembly selectively restricts a rotation of the balancing structure.

A multiple position locking handle for an exercise machine for that is movable into a plurality of different positions when unlocked and that is retained in a single secure position when locked. The multiple position locking handle for an exercise machine generally includes a tubular base having a lower end and an upper end, an elongated member extending through the opening of the upper end of the tubular base and extending downwardly through at least a portion of the tubular base, a handle extending outwardly from the elongated member at an angle, and a locking device. The elongated member is movable within the tubular base when the locking device is in the unlocked state and is substantially not movable within the tubular base when the locking device is in the locked state.

A core fitness system for efficiently exercising the core muscles of a persons body. The system involves working a user's core muscles by rotating the user's body while holding the body at an angle.

A machine for exercising the rotator cuff muscles that is operable to individually and separately isolate and exercise each of the four rotator cuff muscles while the user is in a seated position. The exercise machine includes a plurality of structural elements including a main vertical beam and a base frame operable to be positioned on the ground, where the main beam extends vertically from the base frame. The machine includes a plurality of pulleys mounted to the structural elements and a plurality of exercise cables running through the pulleys, where handles are coupled to the exercise cables. A seat is mounted to the vertical beam and the handles are positioned relative thereto to allow the user to grasp the handles and perform the several exercises for each arm.

An exercise machine includes a motor that drives a belt to move, and an analysis system to collect a peak energy from the motor and to convert the peak energy into different user exercising data.

Systems and methods for fitness tracking are provided. An exercise apparatus is in networked communication with a fitness tracking computing system. The configuration and location of movable components of the exercise apparatus is determined based on sensors. This information is provided to the fitness tracking computing system via networked communication.

Exercise equipment, particularly a linear movable structure and associated selectable elastic resistance bands with or without guide track members are designed to allow low-impact exercises for one or two persons at the same time while permitting either or both participants to remain stationary when utilizing the equipment.

An exercise machine rail system for improved exerciser mounting and dismounting, improved functional ergonomics, and reduced risk of exerciser injury when using an exercise machine. The exercise machine rail system generally includes either two rails in close relationship which are linked together via connectors or a singular rail. Bias members are disclosed as either extending along either outer side of the rails, internally to the rail, or underneath the rail. Due to the narrow nature of the rails used by the present invention, an exerciser is able to mount and dismount the exercise machine easily and efficiently.

A combination massage table with one or more resistance bands (hereinafter, a combination table) is disclosed. In some embodiments, the combination table may comprise: a massage table; the one or more resistance bands; and a means for attaching the one or more resistance bands to the massage table; such that a client using the combination table receives at least one improved health benefit as compared against massage therapy without any resistance band use. Furthermore, methods for using the combination table are disclosed. Such methods may comprise: preparing the combination table for use; preparing the client so the client is laying on top of an upper surface of the combination table; and massaging the client while the client at least intermittently engages one or more resistance bands that are attached to the combination table; wherein in the at least intermittent engagement of the one or more resistance bands while the client is being massaged results in the at least one improved health benefit to the client.

A trampoline comprises a mat, a frame, and a plurality of support rods connecting between the frame and the mat to hold the mat in tension above the frame, the support rods extending or bowing outwards from the frame and curving upwards from the frame towards the mat. Each of the support rods may have an associated shorter secondary support rod. The support rods may have a rectangular cross-section.

A method and apparatus for physical exercises and, in particular, for training the movements “jump” and “squat” from spot for training. The method and apparatus can have the “jump” and “squat” motions follow into a continuous alternating sequence as a response to a passing via a training spot in the same continuous alternating sequence of a lower obstacle, obligating the performance of “jump”, and of the upper obstacle obligating the performance of “squat”.

A push-up device and method of use has been disclosed that employs the use of a spherical member that makes contact with the ground surface and supports the weight of a user when the user grasps the handle members of the push-up device and/or rests thereon. The user may balance his or her body on the push-up device while exercising. The push-up device is operable to permit the push-up device to move or translate in various directions or angles when the user is resting thereon by rotating the spherical member omni-directionally. As such, not only may a user stimulate chest and/or other upper-body muscles, but the user may also stimulate abdominals or other lower-body muscles, permitting the user to stimulate a more variety of his or her muscles through balancing himself or herself on the push-up device through the curved surface of the spherical member.

An abdominal twist exercise device includes a device frame, front and rear rotational axles, a main handle bar, a rotation converter, an adjustable gear, a disengaging lever, a weight, a weight bar, a support rail, a safety handle bar, rotation counters, and a user platform, such that when the main handle bar rotates to one side, the user platform rotates to an opposing side. A rotation converter can include a front chain sprocket, an intermediate rotational axle, an intermediate chain sprocket, a roller chain, an intermediate gear, a rear gear; or a front belt sprocket, a rear belt sprocket, and a twisted belt, connecting the sprockets. Optionally, the front and rear axles can be telescoping.

Technologies for generating user-specific workout plans and tracking a user's progress are disclosed. The user-specific workout plan may be based on a user's goal and the particular workout facility to be used by the user. During performance of the user-specific workout by the user, the user is provided with workout data regarding the user's performance Such workout data may be based on sensor data generated by sensors of the exercise machine used by the user and/or other sensors carried or worn by the user.

A method for configuring and operating one or more fitness studios each comprising a plurality of exercise stations at which users perform associated exercise routines, each station having an associated display, the method comprising, for each fitness studio, periodically retrieving, by a server from a database, fitness information for the studio in question for a specified period, from a multi-period fitness library; communicating, by the server to a studio computer, the retrieved fitness information over a communications network; periodically receiving, by the studio computer, the retrieved fitness information; configuring the exercise stations dependent upon the received fitness information; and communicating, by the studio computer to the exercise station displays, dependent upon the received fitness information, station directions to users exercising at the stations for performing an exercise.

A weight loading system for fitness equipments includes a fitness equipment support, a rally rope, a motor, a motor driving and a motor control unit. The motor is a permanent magnet brushless DC motor with an external rotor structure, and the motor includes a stator mounted onto the fitness equipment support and an external rotor sheathed on the stator and rotatable with respect to the stator, and the rally rope is wound around the external rotor of the motor, and an end of the rally rope is coupled to the external rotor of the motor, and the other end of the rally rope is coupled to the power driving mechanism of the fitness equipment; the power driving mechanism is provided for driving the external rotor of the motor through the rally rope to rotate and generate a rally, and the motor control unit controls the motor to rotate in an opposite direction through the motor driving module, so as to produce a load force opposite to the rally. The weight loading system for fitness equipments structure is simple, lightweight, and achieves the effect of a stepless weight control.

A composite trampoline enclosure system has a trampoline with a trampoline frame and a trampoline bed. The trampoline enclosure is mounted to the trampoline. The trampoline enclosure further includes an enclosure pole formed as a tubular post, and an endcap. The endcap fits over the tubular post. A flexible top line is made of polyethylene or polypropylene. The flexible top line connects to the endcap. The flexible top line supports the trampoline enclosure netting. An extended coil spring is whipped in a helical orientation around an external circumferential periphery of the flexible top line. The trampoline enclosure netting is extended around the trampoline bed. The trampoline enclosure netting is supported by the trampoline pole. The extended coil spring is preferably made of spring steel. The flexible top line is preferably made of a high density polyethylene tube.

An exercise device includes a first tubular frame having a flexible fabric attached thereon, a second tubular frame having a rigid board mounted thereon, and at least three elongate support members disposed between and separate the first tubular frame and the second tubular frame. Each of the elongate members includes a first end fixedly mounted on the first tubular frame and a second end fixedly mounted on the second tubular frame, such that a first cross plane of the first tubular frame is substantially parallel to a second cross plane of the second tubular frame. When the second tubular frame is placed on a substantially flat surface, the exercise device can be used as a jumping exercise device. When the first tubular frame is placed on the substantially flat surface, the exercise device can be used as a stepping exercise device.

The present invention provides an active and passive exercise training equipment comprising a swinging device, a supporting device, and a front supporting device. The swinging device comprises a seat cushion with moving function for a user to sit. The supporting device comprises a telescopic rack and a top rack for the user to grip. The top rack is set on the telescopic rack for being located at different heights. The front supporting device comprises a front telescopic rack and a front grip for the user to bend forward to grip. The grip is set on the front telescopic rack for being located at different horizontal distances and vertical heights. The height and the distance can be adjusted according to the stature or requirement of the user so that the user can train his muscular strength efficiently and also make his body to achieve a relaxed state.

A wall-mounted exercise apparatus, including a plurality of elongate anchor members fixed to a first wall and a second wall; a plurality of hooks fixed to each elongate anchor member; a first strap configured to be attached to a first hook of the plurality of hooks, the first hook being located on a first elongate anchor member fixed to the first wall; and a second strap configured to be attached to a second hook of the plurality of hooks, the second hook being located on a second elongate anchor member fixed to the second wall; wherein the first and second hooks are selected based on a desired difficulty of a selected exercise to be performed.

An exercise machine with a two directional pivoting user support assembly has a user support or platform which supports the user and pivots about a first pivot axis during an exercise movement, and is also pivotable about at least one second pivot axis to involve the user's core muscles in balancing and maintaining the user support in a stable position. A manually operable locking device with a simple flip switch lever is provided for selectively locking the user support against rotation about the second pivot axis, so that the user can easily chose whether to perform the exercise with a stable support or to add a level of difficulty by using the unstable seat mode and exercising core muscles during the exercise.

Exercise machine with load rolling simulation substitutes training in the open air in which a load is rolled or pushed. The exercise machine comprises a continuous moving track (2) of adjustable incline. Above the housing (1) and in front of the continuous moving track (2) is mounted a wheel (4) with paddles (5). The paddles (5) on the outer circumference of the wheel (4) are performed in the shape of teeth, ribs, panels or bars. The wheel (4) is connected by a transmission (20) with the track (2). The track (2) is connected with the brake system (32) for change of resistance to motion of the track (2), and thereby also to turning of the wheel (4). The control panel (6) with display contains commands for adjusting and monitoring the inclination of the track (2) and the resistance to turning of the wheel (4) and for monitoring the velocity and travelled distance of the moving track (2), as well as the duration of the training on the continuous track (2). The exercise machine is used in at least three ways of exercising, it has exceptional ergonomic characteristics, and enables safe training.

A curved manual treadmill for the physical exercises of a user, comprising: a frame extending along a longitudinal direction; a first rotation shaft adapted to rotate around a respective first rotation axis transversal to the longitudinal direction of the frame; a second rotation shaft adapted to rotate around a respective second rotation axis transversal to the longitudinal direction of the frame; a physical exercise surface operatively connected to the first rotation shaft and to the second rotation shaft, so as to generate an endless closed physical exercise path, and a device for resisting the movement of the upper portion of the physical exercise surface operatively associated with at least either the first rotation shaft or the second rotation shaft.

A dynamic stretching, strengthening and stabilization device is provided for postural correction and retraining. The device has a pair of closed loop resistance tubes and a central harness member which positions the closed loop resistance tubes roughly in the form of a FIG. 8. Each loop of the resistance tube is sized to accommodate the arm and shoulder of the user. The device may be used in a stabilization mode or stretching/strengthening mode, and transitions easily between these modes to correct and retrain the user's posture.

The present disclosure describes systems and methods for the treatment of obstructive sleep apnea. The system includes a mouthpiece. The mouthpiece includes a force plate that a user can press against with their tongue. Pressing the force plate enables the user to strengthen their tongue. The system also includes a control module that can measure the force applied to the force plate and provide feedback to the user about progress and the applied force.

A device and methods for bilateral or unilateral physical therapy of lower limbs are disclosed. The device comprises a curved rail mounted on a base and a pair of support members configured to accommodate a portion of a leg of a person, and to slide along the curved rail. The curved rail allows lateral movements of the lower limbs with the support members, the movements being driven by a force of the lower limbs. The methods of the invention allow physical unilateral or bilateral therapy of lower limbs of a person. The initial reinforcement of the lower limbs of a person is improved by the use of this device, which reduces the friction or the resistance caused by the device during the prescribed movements. The invention provides to patients with severe lower limb disability, a physical therapy device that is easy to use with minimum supervision by a physical therapist.

A insensitive explosive comprises: 34.9 wt % diethylenetriamine trinitrate (DETN),33.4 wt % ethylenediamine dinitrate (EDD),25.4 wt % methyl-guanidine (MeNQ), and6.3 wt % guanidine (NQ). This quaternary eutectic is used in combination with a sensitive explosive. A low melting temperature facilitates melt casting to fill 155 mm artillery shells.

The present disclosure relates to compositions comprising at least one fluoroolefin and an effective amount of a stabilizer comprising at least one ascorbic acid, terephthalate, or nitromethane, or mixtures thereof. The stabilized compositions may be useful in cooling apparatus, such as refrigeration, air-conditioning, chillers and heat pumps, as well as in applications as foam blowing agents, solvents, aerosol propellants, fire extinguishants, and sterilants.

Gas-generating devices with grain-retention structures and related methods and systems are described. In particular, gas-generating devices having at least one retention structure fixed to a frame and positioned between adjacent gas-generant grains arranged in a longitudinal stack. Fire suppression systems comprising such gas-generating devices are also described. Additionally, methods of manufacturing gas-generating devices, as well as methods of generating a gas and methods of suppressing a fire utilizing such gas-generating devices are described.

A group of tertiary amine azides are useful as hypergolic fuels for hypergolic bipropellant mixtures. The fuels provide higher density impulses than monomethyl hydrazine (MMH) but are less toxic and have lower vapor pressures that MMH. In addition, the fuels have shorter ignition delay times than dimethylaminoethylazide (DMAZ) and other potential reduced toxicity replacements for MMH.

Disclosed are thermite charges for use in well perforation and downhole fracing. The thermite charges have a core, and optionally a case, where at least one of the core and the case includes thermite material.

The present invention is directed to an explosive composition comprised of heavy ANFO and expanded polymeric beads that have a density that is less than the density of the heavy ANFO. The expanded polymeric beads have a size that is determined or based on the size of ammonium nitrate prills used in the heavy ANFO portion of the composition. In one embodiment, the expanded polymeric beads that are utilized in the composition are at least 70% of the lower limit of the mesh size of the predominant ammonium nitrate prill mesh size. In another embodiment, the expanded polymeric beads are at least 70% of the a size that is related to the average mesh size of the ammonium nitrate prills.

A method of manufacture of foamed celluloid molded products, involving three steps for the manufacture of higher density (0.7 to 1.25 gm/cc) foamed celluloid products or simple geometry lower density (0.2 to 0.7 gm/cc) foamed celluloid products, and four steps for the manufacture of lower density foamed celluloid products of any geometry. The three step process involving: (1) providing small, uniform, pieces of celluloid; (2) presoaking the pieces in a physical blowing agent (PBA) under pressure; and (3) foaming at raised temperature a controlled quantity of the presoaked pieces in a mold—to obtain the desired shape and density. For a lower density foamed celluloid product, of any moldable geometry, the steps are to: (1) small pieces of celluloid, that (2) have been presoaked in a PBA, are (3) pre-expanded to an intermediate density, and then (4) foam the desired lower density foamed product in a mold at raised temperature.

A gas generator for a safety device for a motor vehicle, comprises at least two distinct chambers which communicate with each other through at least one opening or nozzle. A first chamber is isolated from the outside. A second chamber or “diffusion” chamber is able to receive gases generated by the combustion of a solid pyrotechnical charge placed in the first chamber, and to discharge them towards the outside. The solid charge is a mixture consisting of at least one oxidizing charge and a reducing charge, the oxygen balance of which is equilibrated. A heat generator is provided which generates sufficient heat for triggering and sustaining the combustion of the charge without any other interaction, notably of the chemical type, between the heat generator and the charge.

Bimetallic alloys prepared in a ball milling process, such as iron nickel (FeNi), iron palladium (FePd), and magnesium palladium (MgPd) provide in situ catalyst system for remediating and degrading nitro explosive compounds. Specifically, munitions, such as, 2,4,6-trinitrotoluene (TNT), cyclo-1,3,5-trimethylene-2,4,6-trinitramine (RDX), nitrocellulose and nitroglycerine that have become contaminants in groundwater, soil, and other structures are treated on site to remediate explosive contamination.

In certain implementations, a method of manufacturing electrically conductive nanodiamond particles involves providing at least one type of carbon-containing explosive material and at least one type of non-explosive material; wherein the non-explosive material contains at least one or more than one element or species other than nitrogen that serve as a nanodiamond dopant; mixing the carbon containing explosive material with the non-explosive material; detonating the mixture under conditions of negative oxygen balance in the presence of a cooling medium; purifying the product of detonation from incombustible impurities; and carrying out additional processing for activation or enhancement of electrical conductance. This abstract is not to be considered limiting, since other embodiments may deviate from the features described in this abstract.