572results about How to "Improve rotational stability" patented technology

A cutting block for resecting a bone, particularly the distal femur, has a body with a first generally planar bone contacting surface to contact the resected distal surface of the femur. The body has a second surface spaced from the bone contacting surface along an axis perpendicular to said generally planar bone contacting surface. The body has a perimeter surface extending between the first and second surfaces, wherein the perimeter surface is at least partially curved with respect to the axis in both a direction generally perpendicular thereto and generally parallel thereto. The perimeter surface may be polished.

A polyaxial bone screw assembly includes a threaded shank body having an integral upper portion receivable in an integral receiver, the receiver having an upper channel for receiving a longitudinal connecting member and a lower cavity cooperating with a lower opening. A down-loadable compression insert with tool receiving arm extensions, a down-loadable friction fit split retaining ring and an up-loadable shank upper portion cooperate to provide for pop- or snap-on assembly of the shank with the receiver either prior to or after implantation of the shank into a vertebra. The shank and receiver once assembled cannot be disassembled.

A polyaxial bone screw assembly includes a threaded shank body having an integral upper portion receivable in an integral receiver, the receiver having an upper channel for receiving a longitudinal connecting member and a lower cavity cooperating with a lower opening. The receiver can have crimp tabs, but is devoid of spring tabs and collet-like flexible structures. A down-loadable compression insert (some with lock and release feature), a down-loadable friction fit split retaining ring and an up-loadable shank upper portion cooperate to provide for pop- or snap-on assembly of the shank with the receiver either prior to or after implantation of the shank into a vertebra. The shank and receiver once assembled cannot be disassembled. The receiver and insert include aligned tool receiving apertures for lock and release of the polyaxial mechanism.

A glass for use in chemical reinforcement for use in a substrate of an information recording medium, having a composition comprising, denoted as mol %:

A glass for use in chemical reinforcement for use in the substrate of an information recording medium employed in a perpendicular magnetic recording system, in which the glass exhibits the glass transition temperature is greater than or equal to 600° C. A substrate for use in an information recording medium consisting of the above glass and being chemically reinforced. A substrate for an information recording medium consisting of a chemically reinforced glass having a glass transition temperature of greater than or equal to 600° C. and exhibiting a bending strength following heating for two hours at 570° C. of greater than or equal to 15 kgf/mm². An information recording medium comprising an information recording layer on the above substrate for an information recording medium. The present invention provides glass having both high thermal resistance and high strength, a substrate for use in information recording media comprised of this glass, and an information recording medium employing such a substrate.

A pump for a fluid which can be blood has a stator housing and a rotor hub with leading and trailing portions and an intermediate portion disposed therebetween. At least one impeller blade at the leading portion drives circumferential and axial components of a flow into a pump annulus or intermediate pathway portion. At least one stator blade extends radially inward from the stator housing within the intermediate pathway portion and is configured to reduce a circumferential component of the flow.

The present invention relates to a bioabsorbable osteosynthesis fixation device for the fixation of bone fractures or osteotomies. The fixation device comprises a tip (2), a shaft (4) and a head (3). The periphery of the shaft (4) comprises ridges (6) which extend in a direction which forms an angle with the longitudinal axis of the shaft, the angle being between −45° and 45°. The present invention also relates to a method for manufacturing the bioabsorbable osteosynthesis fixation device.

An inclined handle structure for a wheeled case comprises an inclined handle attached at a fixed angle with respect to a wall of the wheeled case. The inclined handle retracts toward and extends from the wall of the wheeled case while being held in a guide which is fixedly attached to the wheeled case. The wheeled case can be tipped on its wheels and pushed or pulled by means of the inclined handle. Alternatively, if the wheeled case has sufficient wheels the case can be pushed or pulled in an upright position by the inclined handle.

An axial tube assembly for a motor includes an axial tube and a sleeve mounted in the axial tube. The axial tube is securely mounted to a casing, and a stator is mounted to the axial tube. The axial tube includes at least one engaging member on an inner periphery thereof. The sleeve includes at least one engaging member engaged with the engaging member of the axial tube. When a bearing is mounted in the sleeve, the sleeve is tightly engaged with the axial tube such that the axial tube and the bearing exert forces to each other to thereby retain the axial tube and the bearing in place.

A wall and ceiling fastening system and method useful for applications such as hanging or securing objects to hollow walls and ceilings is provided. In one embodiment, the fastening system includes a drivable anchor having at least one pivotable section and a pin configured to be inserted into a channel of the anchor. The anchor is driven into a wallboard of the wall or ceiling with a hammer or a suitable tool. As the pin is inserted into the anchor, a lever or rack and pinion action between the pin and the pivotable section causes the pivotable section to pivot towards and come into contact with an interior surface of the wallboard. Depending on the fastening application, the pin can have a suitable head such as a pan screw head, a flat screw head, a round screw head, an oval screw head, a countersunk screw head, a machine screw head, a hook head, an eye hook head, a ring head, a swivel head, a shoulder head, a nut, a bolt head or other suitable head. In addition, the pin can have a ratcheted body, a threaded body, or a ribbed body. In some embodiments, the cross-sectional profile of the anchor is elongated so as to provide a larger supporting surface between the anchor and the wallboard. In addition, the cross-sectional profile of the anchor channel can be elongated so that a wider range of pin body sizes and types can be accommodated. The anchor body may also have one of more stabilizing ribs.

The invention relates to a fluid dynamic bearing system for the particular purpose of rotatably supporting a spindle motor used to drive the disk(s) of a hard disk drive having a stationary shaft, a thrust plate connected to the shaft, a bearing sleeve rotatable about the rotational axis of the shaft and a cover sealing the bearing sleeve, wherein the surfaces of the shaft, the thrust plate, the bearing sleeve and the cover, that face each other and are separated from each other by a fluid-filled bearing gap, form at least one radial bearing region and at least one axial bearing region. According to the invention, the shaft is designed as a hollow shaft, and the cover has a cylindrical section concentric to the rotational axis that is rotatably accommodated in the hollow shaft in such a way that between the inside diameter of the hollow shaft and the outside diameter of the cylindrical section of the cover, an inner bearing gap filled with bearing fluid is formed, the inner bearing gap being connected to the outer bearing gap.

The invention discloses a vertical air conditioner with swinging blades. The vertical air conditioner comprises an air conditioner body. An air outlet is formed in the air conditioner body. The multiple segmented swinging blades are sequentially arranged on the air outlet at least in the length direction of the air outlet, and extend from one end of the air outlet to the other end of the air outlet. Due to the facts that the multiple segmented swinging blades are sequentially arranged on the air outlet and extend from one end of the air outlet to the other end of the air outlet, and the multiple segmented swinging blades are integrated, the swinging blades can adjust the air exhaust direction of the air outlet normally, the length of each swinging blade is decreased, accordingly, the swinging stability of the swinging blade is improved, and accuracy of control over the air direction is improved.

A scanning welding torch with electric motor to drive the electric conducting rod to rotate and generate rotary welding arc is disclosed. Said motor is installed in the casing. The integrated adapter for electric cable, welding wire and protecting gas tube is sealed in the upper part of said casing and electrically connected to the carbon brush dynamically fit with the electric conducting rod which passes through and is fixed to the rotor of motor. The lower end of said electric conducting rod is extended outside the bottom of casing and fixed to the electric conducting mouth via rotary joint. Its advantages are simple structure, step regulation, and high performance stability.