107results about How to "Resistance to friction" patented technology

A method of deploying a prosthesis includes engaging a hub assembly of a handle to a threaded outer surface of a slide shaft of the handle; rotating the hub assembly to cause axial translation of the hub assembly and a sheath coupled to the hub assembly to initiate deployment of the prosthesis; disengaging the hub assembly from the threaded outer surface by pivoting a thread tooth of the hub assembly out of threaded engagement with the threaded outer surface; and sliding the hub assembly on the slide shaft to further retract the sheath and complete deployment of the prosthesis.

A method of deploying a prosthesis includes restraining the prosthesis within a distal end of a sheath. A slide ring of a handle is rotated to initiate retraction of the sheath. In this manner, the prosthesis is initially very gradually released. The slide ring is then slid to complete retraction of the sheath and to deploy the prosthesis. In this manner, the sheath is easily and quickly retracted thus rapidly completing deployment of the prosthesis. Rapid deployment of the prosthesis facilitates faster procedure times, thus minimizing the period of time during which blood flow is occluded.

A leather-like sheet composed of a microfine-fiber entangled body made of bundles of microfine fibers and an elastic polymer impregnated therein. The bundles of microfine fibers are composed of microfine monofibers having an average cross-sectional area of 0.1 to 30 μm² and have an average cross-sectional area of 40 to 400 μm². The bundles of microfine fibers exist in a density of 600 to 4000/mm² on a cross section taken along the thickness direction of the microfine-fiber entangled body. The elastic polymer contains 30 to 100% by mass of a polymer of ethylenically unsaturated monomer. The polymer of ethylenically unsaturated monomer is composed of a soft component having a glass transition temperature (Tg) of less than −5° C., a crosslinkable component, and optionally a hard component having a glass transition temperature (Tg) of higher than 50° C. and another component. The polymer of ethylenically unsaturated monomer is bonded to the microfine fibers in the bundles of microfine fibers. The leather-like sheet has a flexibility and hand such as dense feeling each resembling natural leathers and a high quality appearance. The leather-like sheet is highly stable in quality such as fastness and surface abrasion resistance and excellent in practical performance.

A trigger assembly for activating a firing mechanism. The trigger assembly includes a trigger having a sear arm with a first sear surface, and a firing element including a body portion with a second sear surface and an engagement portion for engagement with the firing mechanism, for activating the firing mechanism. The trigger assembly also includes a captured roller positioned for engagement with the first and second sear surfaces. The trigger is pivotable between a load position, in which the captured roller is held between the first and second sear surfaces, and a release position, in which the second sear surface is disengaged from the captured roller and the firing element is released. The firing element is pivotable between a first position, in which the firing element is held by the captured roller, and a second position, in which the firing element is disengaged from the captured roller.

An orthopedic implant having a metal substrate with an articulating surface includes a coating for the articulating surface made of pyrolytic carbon. Typically, the substrate is made of a metal such as titanium or stainless steel, or alloys thereof. The pyrolytic carbon coating preferably is applied by vapor deposition.

A pumping station for pumping a cooling and lubricating fluid containing particulate matter such as machining chips has a compact structure with a relatively low total structural height, while still assuring that the chips are conveyed with the fluid to the pump suction inlet, without settling-out or accumulating in the apparatus. The pumping station (1) includes a collecting container (5) with at least one pump (6) arranged therein, a chip breaker (7) and a supply conduit arrangement. The supply conduit arrangement includes a supply line (2) through which the cooling and lubricating fluid containing the machining chips is received from a machining tool or transfer station. Furthermore, two branch lines (3) and (4) are interposed and connected between the supply line (2) and the collecting container (5). A first branch line (3) conveys the fluid, from which the chips have been removed, with a slight downward slope toward the collecting container (5). The second branch line (4) conveys the chips that have been removed from the fluid flow. A scraper conveyor or the like conveys the chips upward through the second branch line (4), and the outlet end of the branch line (4) is arranged directly above the chip breaker (7), which in turn is arranged above the outlet end of the fluid conveying branch line (3). The comminuted chips thus fall from the breaker (7) directly into the flow of fluid, in which the chips are then entrained and carried along into the sump (13) of the collecting container (5), where the chips and fluid are sucked and pumped away by the pump (6).

An orthopedic implant having a metal substrate with an articulating surface includes a coating for the articulating surface made of pyrolytic carbon. Typically, the substrate is made of a metal such as titanium or stainless steel, or alloys thereof. The pyrolytic carbon coating preferably is applied by vapor deposition.

A learning apparatus for a variable valve control of an internal combustion engine includes a variable valve operating mechanism, an actuator that rotationally drives the control shaft, a control shaft sensor that detects an angular position of the control shaft, a reference position determining section that determines whether or not the control shaft has reached a predetermined reference position under the drive from the actuator, a learning section that learns an output value of the control shaft sensor when it is determined that the control shaft has reached the reference position and stores the learned output value as a sensor output reference value, and a learning preparing section that causes the control shaft to be driven by the actuator toward the reference position when a crankshaft of the engine is rotating and supply of fuel to the engine is stopped. A learning method is also provided,

A self-locking drill chuck device, comprising a body, a nut, jaws, a front sleeve, a rear sleeve, a nut jacket and a rolling member, wherein three jaws are respectively and operatively inserted into three angled bores uniformly distributed around the body, the threads of the nut engages with that of the jaws to form a thread driving mechanism, wherein a ratchet wheel is fixedly mounted at a rear portion of the body, a disk spring is provided between the rolling member and a load carrying shoulder of the body, the front portion of the body has key slots and an annular connecting groove, the rear end of the nut jacket has a plurality of driving grooves and keys on which a locking elastic element and a driving elastic element are respectively fixed, A control ring fixedly fitted in the rear sleeve has an internal surface thereof formed with a plurality of driving keys and a cam face including a plurality of bulged portions and curved teeth. The front sleeve has positioning keys and connecting clips formed in an internal surface thereof. The drill chuck of the present invention has a simple structure, convenience of operation and high working stability and reliability of self-locking capacity.

The invention discloses a bolt shear force connecting piece and a method for enhancing shear strength by use of a spring. The bolt shear force connecting piece comprises a screw cap, a screw rod, threads, nuts, screw pads and a spring, wherein the screw rod passes through a hole preformed in a steel beam flange and then is fastened on the steel beam flange by virtue of the upper and lower nuts; the screw pads are arranged between the lower surface of the steel beam flange and the nuts; the top end of the screw rod is provided with the screw cap; the spring is arranged around the screw rod; a circle of spring part at the bottom of the spring and the surface of the steel beam flange are welded; the height of the top surface of the spring is flush with that of the screw rod, and the screw rod is positioned in the inner center of the spring. The spring arranged at the periphery of the bolt connecting piece can be used for enhancing the rigidity and shear resistance of the shear force connecting piece; bolted connection is adopted for replacing common welded type connection, so that the process is simple, the construction operation is convenient, manpower, material resources and time are saved, and furthermore the connecting quality can be ensured easily. The bolt shear force connecting piece is applicable to structure systems such as a bridge span and a building floor system, and is used for connecting a steel beam with concrete.

A recording apparatus includes a recording head, a transport driving roller, and a transport driven roller. The recording head discharges ink onto a transported recording medium, thereby performing recording. The transport driving roller is provided on the upstream side of the recording head in the transport direction and includes driving side roller portions and depressed portions. The driving side roller portions are rotationally driven, thereby transporting the recording medium. The diameter of the depressed portions is smaller than that of the driving side roller portions. The driving side roller portions and the depressed portions are arranged in a direction perpendicular to the transport direction of the recording medium in such a manner that at least one driving side roller portion alternates with at least one depressed portion. The transport driven roller is provided opposite the transport driving roller and includes driven side roller portions and presser rollers.

When an engaging pawl 23b is fitted into a recessed portion 34b of a first sprocket 34, which is linked by a chain 33 to a second sprocket 32 that drives an oil pump 3 disposed at a radial detached from a torque converter 2, frictional resistance between a side face 34a of the first sprocket 34 and an end face 23c of the engaging pawl 23b is reduced by tapering the side face 34a of the first sprocket 34.

A bearing is manufactured by filling iron-based material powder and copper-based material powder in a filling portion of a mold, compacting those material powder so as to for a green compact, and then sintering the green compact. The copper-based material powder contains flat powder particles, the flat powder particles having a large aspect ratio than particles of the iron-based material powder. The coppers-based powder particles segregate on a sliding surface by vibration. The sliding surface of a bearing is covered with copper, and a ratio of iron increases from the sliding surface toward the inside. Since a rotation shaft slides on the sliding surface covered with copper, a frictional coefficient between the rotation shaft and the sliding surface is reduced, thus enabling a smooth rotation thereof. Simultaneously the usage of iron imparts predetermined strength and durability.

The invention belongs to the technical field of geotechnical engineering model test equipment. The proposed geotechnical engineering anti-explosion structure model test device is composed of a side-limited box body and an explosion pit at the lower part, and is equipped with a matching wave-eliminating mechanism, a locking mechanism and a sliding Positioning mechanism; wave dissipation mechanism includes aluminum wave dissipation grid (21) and wooden wave dissipation plate (20); sliding positioning mechanism includes two-way jack cylinder (15), guide rail (17) and limit block (19); locking The mechanism is composed of a locking pull rod (3), a side limit connecting block (18) and a nut (2). The invention can simulate different explosion forms in equipment with moderate size; meet the convenient and feasible requirements for excavation of caverns, installation of enclosure structures and measurement equipment; it can be reused, and it is beneficial to observe the damage of structures in the test; The results can provide an important basis for underground explosion-resistant engineering design and scientific research.

A terminal used in a connector includes a base portion that is retained in a housing, and a front terminal and a rear terminal that extend from the base portion. A front terminal is provided with a front contact portion that comes in contact with a mating terminal through a flat plate surface of the front contact portion, and a rear terminal is provided with a rear contact portion that comes in contact with a terminal of a mating connector through a flat plate surface of the rear contact portion. The front contact portion and the rear contact portion are arranged at the same position in a width direction.