Embodiments provide various components of a chain saw, including saw chain elements, sprockets, and other fixtures, that may facilitate sharpening of cutter links during operation. In various embodiments, the components may increase stability during sharpening, provide nose mounted sharpening fixtures, and/or facilitate the resizing and/or reshaping of a sharpening element.

A cutting table includes a cutting surface, an opposing surface, a cutting table outer wall, and one or more fins. The cutting table outer wall extends from the circumference of the opposing surface to the circumference of the cutting surface. The fins extend from a portion of the cutting surface to a portion of the cutting table outer wall. The cutting table is optionally leached prior to forming the fins. One or more fins are positioned in parallel with at least another fin in some embodiments. In some embodiments, the fins are positioned circumferentially around the cutting surface. In some embodiments, the cutting table is coupled to a substrate to form a cutter. The fins are formed either after or during the formation of the cutting table.

Various embodiments of the invention may be used to verify that a person being authorized by biometric techniques to use a device is a living person and not some form of recording intended to spoof the system. Some embodiments may try to cause a change in a measured biometric feature, and compare images taken before and after the change to verify the change occurred. In some embodiments, multiple stages of verification may be used, either to increase the difficulty of spoofing the security system, or to provide different levels of security for different levels of access to the device's functionality.

The kitchen knife with the sharpener includes: a cutout recess formed in an end of the handle; a locking space extending from the cutout recess; and a sharpener, including: a locking part removably received in the locking space; a sharpener body extending from the locking part; a whetting groove transversely formed in the sharpener body; plate-shaped whetstones inclinedly installed on opposing sidewalls of the whetting groove so that the whetstones form a V-shaped arrangement; and a rubber cushion placed below a rear surface of a whetstone.

A drilling tool for machine tools has a drill body, a cutting head arranged on the front face of the drill body and a shaft arranged at the end thereof, wherein the drill body has two chip flutes, which are delimited at their flanks by ribs and a first chip flute of which is spirally curved. A second chip flute is not spiraled or is spirally curved with a pitch differing from the first chip flute, preferably running in the same direction of rotation.

An adjustable manual abrasive sharpener having a pair of sharpening slots formed in a frame with opposing abrasive arms being pivotally mounted in each of the sharpening slots. A rod is mounted on the frame for rotatable motion and for linear motion long its axis of rotation from a position at which the rod is locked against rotation to a depressed position whereby the rod may be rotated. The bottom end portion of the rod includes a pinion gear which engages a pair of gear racks which are mounted for movement laterally relative to the axis of rotation of the rod. The pair of gear racks respectively engage slots formed on the bottom of the abrasive arms in each sharpening slot. Rotation of the rod causes movement of the gear racks to adjust each pair of abrasive arms with respect to each other to vary the sharpening angle of the abrasive elements.

A method for the manufacture of a cutting tool provided with a tool holder (1) to which a cutter (2) is separably attached, includes applying a generative production process to a tool base body (3) to create the tool holder (1) with a desired finished shape.

A chain sharpening device arranged to sharpen a saw chain. The device comprises a housing (110), arranged to be detachably mounted on the guide bar (3), a sharpening element (140) selectively displaceable relative to the housing between a resting state and a sharpening state, an actuator (150), selectively displaceable between an inactivated state and an activated state, which actuator is connected to the sharpening element and arranged to selectively bring the sharpening element from the resting state to the sharpening state, a first biasing member (160) operatively connected to the actuator and arranged to bias the actuator towards its inactivated state, a second biasing member (170), operatively connected to the sharpening element and arranged to enable relative movement between the actuator and the sharpening element when the sharpening element is in the sharpening state, so as to delimit a force with which the sharpening element (140) can be pressed towards the saw chain.

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 threaded fastener driving tool includes a proximal end portion, a distal driving head, and a torsion zone extending proximally from the driving head, The distal driving head has a central portion and a plurality of driving surfaces. Each pair of adjacent driving surfaces define a driving space therebetween. The driving surfaces and driving spaces are configured to engage a threaded fastener. The torsion zone includes a plurality of helical grooves bounded by non-cutting surfaces, each helical groove in communication with and extending proximally from at least one of the driving spaces. The helical grooves are configured to untwist and cause lengthening of the torsion zone when an input torque applied to the proximal end portion is insufficient to overcome an output resistance torque at the driving head. The torsion zone may comprise a plurality of twisted wires or cables. A method of manufacturing the driving tool is disclosed.

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.

The application comprises a blank for producing a cutting tool with at least one inner bore for conducting fluids, wherein the blank comprises at least a first and a second portion along, its longitudinal axis, wherein the inner bore in the first portion is formed substantially in a straight line and parallel to the longitudinal axis of the blank, and the inner bore in the second portion has a first twist with a first twist angle greater than zero, wherein the blank can be obtained by a continuous pressing operation, in particular a continuous extruding operation. The application also describes an extrusion device for producing a blank, wherein the extrusion device comprises a control element for controlling the twist angle, in particular the first and/or second twist angle.

A portion of the sharpener handle is recessed to receive the curved blade of a lopper. The cutaway allows the sharpening element to sharpen the lopper blade along its entire length. Additional sharpening elements can be positioned along the handle to provide a multipurpose sharpening tool.

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 multi-purpose balance exercise device designed to be used in multiple positions and for diverse exercises. For example, various embodiments allow for the multipurpose device to be use as an aerobic step device as well as the ability to easily adjust the device to various heights to easily decrease the level of difficulty of the device for use during various exercises. The balance exercise device can provide a polarity of handles and grab points both horizontally and vertically, which allow for an enhanced number of exercises or movements using either the top and/or bottom of the device. The balance exercise device includes a flexible bladder filled with air, other gases, or gels attached to a substantially rigid base. The base can include an interior within which features such as handles are disposed to provide a gripping or lifting exercise to which the balance exercise device can be used.

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.

An apparatus (100) for gait training has a movable base (200) comprising at least one drive unit (210) for moving the movable base, an arm arrangement (300) extending from the movable base, a weight support system (400) to enable a person to be at least partially suspended from above via said arm arrangement, a movement detector to detect a movement of the person and a control unit adapted to control said drive unit(s) in response to a movement of the person detected by the movement detector such that the movable base follows the person in a predetermined distance range and in a predetermined angular range with respect to a movement direction of the person.

A jaw-strengthening device has a first receiver configured to receive a row of teeth having first and second molar sections, the first receiver having a first air chamber within the receiver positioned in a first molar section, a second air chamber within the receiver positioned in a second molar section, and an egress valve, configured to permit egress of air and prevent ingress of air, in communication with the first and second air chambers, a second receiver configured to receive a second row of teeth, the second receiver having a third air chamber within the receiver positioned in a first molar section, a fourth air chamber within the receiver positioned in a second molar section, and an ingress valve in communication with the third and fourth air chambers, wherein the first and third air chambers, and separately the second and fourth air chambers, are in communication.

Apparatus (2) for exercising a person's calves (4) in two different ways, which apparatus (2) comprises a footrest (8), a kneerest (10), and a length of stretchable material (12) for extending between the footrest (8) and the kneerest (10), and the apparatus (2) being such that: (i) the length of stretchable material (12) is flat sided;(ii) the footrest (8) has roller means (14);(iii) the roller means (14) allows the length of stretchable material (12) to connect to the footrest (8) such that the flat sides of the length of stretchable material (12) slide over the roller means (16);(iv) the kneerest (10) has anchor means (16) for the length of stretchable material (12);(v) the anchor means (16) allows the length of stretchable material (12) to connect to the kneerest (10) such that the flat sides of the length of stretchable material (12) pass over the anchor means (16); and(vi) the footrest (8), the kneerest (10), and the length of flexible material (12) are separable from each other.

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 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.

A layered exercise contact counter display tracking and showing repetitive contacts with the lens contact surface of a housing covering a sensor pad, which responds to contacts sending a signal to a powered circuit board and remote tracking devices to record and display the number of repetitive hits adapted for mounting on an exercise device or a support surface to encourage an exerciser to complete and exercise or contact event.

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.

A portable paddleboard exercise apparatus having a balance platform, an elongated member, a paddle handle, and a number of resistance bands. The apparatus may further include a frame with one or more support members configured to support the balance platform. The balance platform includes an upper surface for a user to balance thereon. The elongated member extends from the balance platform. The resistance bands extend from a distal end of the elongated member to the paddle handle. A user may balance on the balance platform in one of a number of positions while pulling the paddle handle against a resistive force generated by the resistance bands.

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”.

An apparatus and system whereby a user can move by guidance of a return track on a challenger course. The return track may extend away from the challenge course and overhang its main frame so the user can experience an element outside of the main frame.

An exercise apparatus comprising a foot support movable by the user on the frame back and forth through any one of a plurality of complete, reproducible and different arc segments of a master arcuate path, the foot support being interconnected to an arc segment selection device that is manually actuatable to enable the user to manually select any one of the plurality of different arc segments, the foot support being interconnected to an arm having a handle manually graspable by the user to reduce or increase power or energy required by the user to move the foot support.

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 exercise device includes a base frame having a first baseboard member, a second baseboard member, and a base pad disposed in between. The first baseboard member includes a first locking member disposed on a first headend of the first baseboard member, and the second baseboard member includes a second locking member disposed on a second headend of the second baseboard member. The exercise device further includes a pole frame having a top crossbar, a bottom crossbar, a first side pole, and a second side pole. The first lock member of the first baseboard member is inserted into a cross section of the first side pole and the second lock member of the second baseboard member is inserted into a cross section of the second side pole, such that the pole frame is interlocked with the base frame substantially perpendicularly.

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.

An exercise tracker includes a force sensor programmed to output a force signal representing a force applied to a cable associated with a piece of exercise equipment. The exercise tracker further includes a processing device programmed to receive the force signal and determine, from the force signal, exercise data including an amount of weight lifted.

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.