180results about How to "Reduce rotational friction" patented technology

A magnetic arrangement is described for an implantable system for a recipient patient. An implantable coil housing contains a signal coil for transcutaneous communication of an implant communication signal. Freely rotatable within the coil housing is a cylindrical implant magnet for transcutaneous magnetic interaction with a corresponding external attachment magnet. The implant magnet has a central cylinder axis of symmetry, and a magnetization direction along a magnetic axis angled away from the axis of symmetry at a non-zero angle less than 45 degrees.

A prosthetic limb has an outer surface that is a mirror image of an intact limb or a generic limb design. The intact limb is scanned and the surface data is manipulated to create a virtual mirror image. If generic data is used, the intact leg can be measured and the generic surface can be adjusted so the prosthetic limb appears similar to the intact limb. The end of the amputated limb is also measured to obtain socket data. A knee and foot are incorporated to form a virtual prosthetic limb represented by design data. The design data for the virtual prosthetic limb is forwarded to a rapid prototyping machine that fabricates the entire leg simultaneously. Once completed, the prosthetic limb is shipped to the patient.

A toilet tool storage device for providing accessible and transportable storage for a tool having an implement and a handle is disclosed. The device includes a first shell and a second shell. The first shell has an inner surface defining a receptacle sized to house the implement and an outer surface defining a first opening. The second shell is rotatably engaged to the first shell and has an outer surface defining a second opening. The second shell is rotatable between a first position and a second position. In the first position, the first opening and the second opening are cooperatively aligned to provide access to the receptacle so that the tool may be moved in or out of the receptacle. In the second position, the outer surface of the second shell and the first opening are cooperatively aligned prohibit access to the receptacle, thereby enclosing the implement.

A fishing reel including a housing having a central hub and a main shaft having a proximal end and a distal end, the main shaft being non-rotatably fixed to the central hub at its proximal end. A spool having a central recess is releasably secured to the main shaft distal end and a one-way clutch having a central bore is non-rotatably received in the central recess. The reel also includes a drag assembly with a drag housing having a drag surface and a central aperture, the drag housing being fixed to the central hub of the housing such that a drag cavity is formed therebetween. A sleeve extends along the main shaft and has a first portion received in the central bore of the one-way clutch and a second portion extending into the drag cavity. A first drag washer is disposed in the drag cavity and non-rotatably fixed to the second portion of the sleeve and a drag knob is rotatably secured to the housing. Rotation of the drag knob in a first direction urges the drag washer axially along the sleeve toward the drag surface and increases rotational frictional force on the first drag washer. Rotation of the drag knob in a second direction reduces rotational frictional force exerted on said first drag washer.

A rotary joint for use in directional control of a subterranean rotary steerable drilling apparatus. The rotary joint is formed by mated spherical-shaped sockets, each of which is connected with a hollow rod. By virtue of this arrangement, a continuous passageway is provided for fluid to flow through the rotary joint, which fluid may be used for cooling the rotary joint during operation of the rotary steerable drilling system.

An improved structure for rotational support for a heat-dissipation fan is disclosed, comprising a hollow ceramic bearing passing through and concentric with the fan rotor and rotating with said rotor, a hollow ceramic support bearing fixedly mounted to the base of the fan, and a hollow or solid ceramic axle tube passing through the inside of said bearing and rotating freely to reduce friction and allow high-speed rotation. The exterior surface of said bearing is ground or otherwise formed to provide better connection with the rotor, while the interior of the bearing and exterior of the axle tube are further processed to reduce contact area therebetween to reduce rotation friction. This improved structure has achieved reduced friction, reduced noise, reduced power consumption, longer life and higher rotational speed.

A lift sub handling assembly for gripping, handling and maneuvering a lift sub or other tubular member. A yoke member defining a slot is rotatably attached to a lifting frame which, in turn, can be suspended from a hoist, winch or other lifting device. A gate can be selectively opened to a lift sub or other tubular member to be received within the slot, and thereafter closed to secure the lift sub or other tubular member in place. A motor can selectively rotate the yoke member relative to the lifting frame, thereby changing orientation of a lift sub or other tubular member held within the slot.

A hybrid electric drive system for a vehicle comprises a combustion engine (1), a transmission (2), a first clutch (3) disposed between the engine (1) and the transmission (2), a rotating electric machine (4) which serves as a motor as well as a generator, a second clutch (30) disposed between the rotating electric machine (4) and the transmission (2), and a storage device (9). When the second clutch (30) is commanded to connect the rotating electric machine (4) to the transmission (2), a control unit (10) controls the rotating electric machine (4) so as to decrease the difference between the rotation speeds of the rotating electric machine (4) and the transmission (2) (S2) and cause the second clutch (30) to connect the rotating electric machine (4) to the transmission (2) only after the difference decreases to a allowable value (S3, S4).

A drum type-variable speed drive wherein a spring bearing member, which is restricted from moving in the axial direction of departing from a shift fork by a locking member fixed to a shift fork shaft, is pivotally supported by the shift fork shaft. A lost motion spring is interposed between the spring bearing member and the shift fork. Movement of the shift fork shaft in the axial direction caused by rotation of a shift drum presses the spring bearing member through the locking member, whereby the spring load of the lost motion spring acts on the shift fork.

The invention relates to the field of automatic machining, in particular to an automatic lathe provided with a feeding function and used for turning threads. The automatic lathe comprises a lathe headand a lathe body; a three-jaw chuck is arranged on the side wall, close to the lathe body, of the lathe head; a lifting assembly is arranged on the side of the three-jaw chuck so as to lift workpieces on a feeding mechanism; the feeding mechanism comprises a lifting rod, a rotating assembly and a clamping assembly; a driving mechanism is arranged at the top of the lathe body; and the driving mechanism comprises a horizontal sliding assembly, a longitudinal sliding assembly, a transverse sliding assembly and a propelling assembly. The automatic lathe provided with the feeding function and usedfor turning threads can automatically turn threads on the workpieces, meanwhile, a feeding function is achieved, the distance of a turning tool can be adjusted according to machining requirements soas to meet requirements of different screw pitches, different screw thread depth and different thread length, and the fatigue degree of workers is reduced meanwhile the production efficiency is improved.

A grinder comprises a bearing track and a plurality of bearing elements such as ball bearings or roller bearings. Optionally, the bearing elements are protected from fouling or contamination from the material being ground, which can be, for example, herbs, spices, tobacco, or cannabis.

A seed meter for an agricultural seed planter, wherein the seed meter includes a rotating distributing seed disk defining a plurality of radially spaced apertures. The seed disk or drum is operatively connected to a vacuum source for creating a pressure differential between the exterior and the interior of the seed disk so as to pick up seeds for dispensing. Secured to the exterior surface of the seed disk are a plurality of arm members made from a resilient, yet rigid material, such as spring steel, which include an end portion defining an aperture that is positioned over a corresponding aperture formed about the periphery of the seed disk. As the drum is rotated through a supply of seeds, individual seeds are urged onto the apertures of the arm members and corresponding seed disk apertures, and held in place by the vacuum. A lifter mechanism mounted with a frame and including an end that engages at least the portion of the seed disk or drum defining the seed apertures causes the radial outward end of the arm members to be urged away from the surface of the seed disk as the disk is rotated relative to the end of the lifter so that the seed held on the arm member is moved away from the vacuum source and communication with the vacuum source is disrupted. The lifter may optionally include a portion that also occludes the aperture in the seed disk, thereby temporarily cutting off the vacuum force from the individual seed entirely. The lifter in conjunction with a vacuum breaker plate may also physically dislodge any seed or debris not previously removed. As the seed disk continues to rotate, the arm members are disengaged from the lifter such that the arm members are allowed to return to the position where the apertures in the arm members and seed disk are again overlaid.

An electric water pump may include a stator generating a magnetic field, a rotor rotated by the magnetic field, a pump cover, a body having a volute chamber with the pump chamber, a stator chamber and a rotor chamber, the stator being mounted in the stator chamber and the rotor being mounted in the rotor chamber, a shaft fixed to the rotor, an impeller fixed to the shaft in the volute chamber, a driver case mounted at a rear end of the body and having a rear surface opened backward and formed of a driver chamber therein, and a driver mounted in the driver chamber and applying a control signal to the stator, wherein the case surface is provided with an insert portion protruded forward from an external circumference thereof and inserted in a rear end portion of the body, and a fixing groove in which the insert portion is inserted.

A straight-through rotary valve structure includes: a case having an internal conic receiving space with an opening, a first extension section being disposed at a tip of the receiving space, a second extension section being disposed beside the first extension section; a conic rotary valve block having a pivot shaft and formed with a first hole and a second hole, the first hole communicating with a third hole formed at a tip of the rotary valve block in communication with the first extension section, the second hole communicating with a fourth hole formed on a conic face of the rotary valve block; and an outer cover blocking the opening of the case. The outer cover is formed with a central shaft hole through which the pivot shaft passes. The outer cover is further formed with a first perforation and a second perforation corresponding to the first and second holes respectively.

A slider, includes a slider base, a pull-tab, a connecting shaft and a spring; the slider base includes an upper blade, a lower blade, and a connecting pin connecting the upper blade and the lower blade; said pull-tab is integrated with the connecting shaft; the pull-tab includes a pull-tab body, with a spring mounting part and a locking part set at the anterior-end-face of the pull-tab body; the anterior-end-face of the pull-tab body is set as a locking vertical plane and the bottom of the pull-tab body is set as cambered surface; the connecting shaft is fixed to the anterior-end of the pull-tab body and the length of the connecting shaft is larger than the width of the anterior-end-face of the pull-tab body; the connecting shaft runs through the spring mounting part and the locking part and extends to both sides of the anterior-end of the pull-tab body.

The invention provides a transmission assembly and a lifting vertical column. The transmission assembly comprises a first screw rod, a second screw rod, a third screw rod, a driving device, a first nut which is in transmission fit with the first screw rod, a first sleeve fixedly connected with the first nut, a second nut which is in transmission fit with the second screw rod, a second sleeve fixedly connected with the second nut, a third nut which is in transmission fit with the third screw rod, and a third sleeve fixedly connected with the third nut; the first nut, the second nut and the third nut are fixedly arranged in the circumferential direction, the second screw rod and the third screw rod are hollow, the first screw rod and the second screw rod can rotate synchronously and expand and contract relatively in the axial direction, and the second screw rod and the third screw rod can rotate synchronously and expand and contract relatively in the axial direction; and the four-sectiontransmission assembly achieves driving through rotation of the screw rods, the sleeves are driven by the nuts to achieve expanding and contracting, and thus, transmission of the transmission assemblyis stable and reliable.