30results about How to "Maintaining compression" patented technology

An improved bone screw is disclosed which includes a shaft with distal portion having a threaded surface thereon, a sleeve having an opening which receives the shaft such that the shaft is able to move within the sleeve without moving the sleeve. A compressive device may be incorporated between the sleeve and the proximal portion of the shaft such that the compressive device forces the shaft and sleeve towards at least a portion each other, thereby maintaining the compressive load at the union of the fracture. As additional compression is exerted on the load from weight bearing, the force may be reduced, but the head of the sleeve is still substantially maintained against the lateral cortex.

A slurry chamber is fastened to and held in coaxial alignment with a chromatography column by a V-band. One end of the column has an end cap and frit. A slurry of fluid and chromatographic media is placed in the column and chamber. A piston is forced through the chamber and into the column by a hydraulic ram to expel the fluid and form a media bed in the column. The slurry chamber is removed, and a split end cap is fastened to the column. A threaded recess in the split end cap receives a split, threaded collet. The collet is tightened until it pushes against the piston with the same force as the ram, at which point the ram is released and the column removed for use.

Medical devices and related methods for closing a perforation in a bodily wall The medical device generally includes a suture having opposing first and second ends and a set of visceral anchors. Each visceral anchor includes a crossbar having opposing ends and a suture slidably attached thereto. Each visceral anchor is passed through the bodily wall adjacent the periphery of the perforation. The ends of the suture are tensioned to reduce the distance between the visceral anchors and compress the bodily wall around the perforation. The ends of the suture are secured to maintain the compression of the bodily wall and close the perforation.

A locking arrangement for a door system of a transit vehicle includes a combination of a lock mechanism and an electromagnetic brake. The lock mechanism enables positive locking of at least one door but does not require substantial contact between moving and stationary lock elements. The lock mechanism is connected with the manual release means for door opening during an emergency. The electromagnetic brake maintains door seal compression in the closed and locked condition which improves sealing capabilities and provides for reliable lock mechanism operation. Such combination provides locking redundancy and meets various requirements regarding annunciation and manual release operation.

A corn head divider lift assist linkage comprises two members and a spring pivotally coupled together, wherein one of the two members is pivotally coupled to a row crop divider and another of the two members is pivotally coupled to a bracket that is fixed at the rear of two adjacent row units.

A gauge device that measures and displays the tension applied to a first object portion and a second object portion is disclosed. An exemplary gauge device comprises a first and second housing portion, a tension member, a compression member and a connector portion. The components of the gauge device may be cannulated so as to allow a wire (e.g., lagwire) connected to a first and second object portion to be inserted through the gauge device. When pressure is applied to the lagwire, the tension member is compressed causing the housing to translate horizontally along indicator, thus displaying the amount of tension applied.

A locking arrangement for a door system of a transit vehicle includes a combination of a lock mechanism and an electromagnetic brake. The lock mechanism enables positive locking of at least one door but does not require substantial contact between moving and stationary lock elements. The lock mechanism is connected with the manual release means for door opening during an emergency. The electromagnetic brake maintains door seal compression in the closed and locked condition which improves sealing capabilities and provides for reliable lock mechanism operation. Such combination provides locking redundancy and meets various requirements regarding annunciation and manual release operation.

A valve activation assembly which mechanically collapses a collapsible member, such as a buckling pin, in response to both overpressure and underpressure conditions of a pressurized fluid. A retention member retains the valve member in a selected position with respect to the fluid, such as an open or closed position. A piston assembly is configured to mechanically collapse the collapsible member both when a fluidic pressure upon the piston assembly exceeds a first level, and when a fluidic pressure upon the piston assembly falls below a second level. Upon collapse of the collapsible member, the valve member releases the valve member, allowing the valve member to move to a different selected position (such as closed or open, respectively). A third piston member and a biasing member thereon can also be utilized. In some embodiments, a fluid is preferably held in compression between selected piston members.

An connector includes a terminated cable, a connector body defining a cylindrical terminal cavity configured to receive the terminated cable, and a cable seal axially surrounding a portion of the terminated cable. The cable seal defines a compliant primary sealing ring that is in compressive contact with an inner wall of the terminal cavity. The cable seal further defines an extended sleeve. The connector also includes a seal retainer that is inserted within a distal end of the terminal cavity and axially surrounds at least a portion of the extended sleeve. An inner surface of the seal retainer is proximate at least a portion of the extended sleeve and an outer surface of the seal retainer is proximate the inner wall of the terminal cavity.

A manually operated dough press comprising a frame with a base and a housing. A shaft mounted for reciprocating motion extends from an opening in the housing and an upper platen is attached to the lower end of the shaft. A pair of lower platens are pivotally mounted to the base so that they can be alternately aligned with the upper platen. A drive mechanism moves the shaft between an open position where the upper platen is spaced from the aligned lower platen and a closed position where dough on the aligned lower platen is compressed between the upper and lower platens. The drive mechanism includes a mechanism for latching the upper platen in the closed position.

A packaging system for packaging a compressible article, such as a stack of interfolded paper towels, includes a sleeve supply arrangement for supplying a packaging sleeve to a loading area, a reciprocating article supply arrangement for selectively positioning a compressed article in the loading area, and a sleeve advancing arrangement for advancing the formed sleeve onto the compressed article at the loading area. After a sleeve is advanced onto the compressed article, the article supply arrangement is moved away from the loading area. A movable stripper engages the article and the sleeve during movement away from the loading area, to strip the article and the sleeve from the article supply arrangement. As the article and the sleeve are removed from the article supply arrangement, the article undergoes decompression and establishes contact with the sleeve to maintain the article and the sleeve in frictional engagement, to form a pack.

A medical clamp for holding a uterus includes a first and second curved plates that capture between them the major exterior walls of the uterus, and an operating handle having pivotally connected first and second actuating arms, each of which has a distal portion and a proximal portion with a grip for a user, whereby the distal portions are moved toward each other when the user moves the grips toward each other to capture the uterus between the plates, Ball-and-socket joints connect the distal handle portions of the actuating arms to respective plates. The ball-and socket joints enable rapid positioning of the clamp on the uterus to arrest emergency postpartum hemorrhaging, assist in exerting pressure on the uterus over the entire extent of the plates, facilitate manipulation of the uterus using the clamp, and permit other surgical interventions to be performed with the clamp in place.

An improved bone screw is disclosed which includes a shaft with distal portion having a threaded surface thereon, a sleeve having an opening which receives the shaft such that the shaft is able to move within the sleeve without moving the sleeve. A compressive device may be incorporated between the sleeve and the proximal portion of the shaft such that the compressive device forces the shaft and sleeve towards at least a portion each other, thereby maintaining the compressive load at the union of the fracture. As additional compression is exerted on the load from weight bearing, the force may be reduced, but the head of the sleeve is still substantially maintained against the lateral cortex.

A manually operated dough press comprising a frame with a base and a housing, an upper platen having a working surface, and a lower platen attached to the base and having a working surface opposed to, substantially parallel to, and spaced from the upper platen working surface. The upper platen is attached to the lower end of a shaft that extends from the housing and mounted for reciprocating motion. A pair of mated interlocking components, one attached to the shaft and one attached to the housing, provide stability for vertical reciprocation. The drive mechanism includes a rod fixed perpendicularly to the shaft interlocking component, a pair of cam with spiral slots within which the ends of the rod ride, and an axle to which the cams are mounted and driven by a handle that rotates the cams to raise and lower the upper platen. Counterbalance for the upper platen / shaft is provided by a torsion bar assembly.

A valve activation assembly which mechanically collapses a collapsible member, such as a buckling pin, in response to both overpressure and underpressure conditions of a pressurized fluid. A retention member retains the valve member in a selected position with respect to the fluid, such as an open or closed position. A piston assembly is configured to mechanically collapse the collapsible member both when a fluidic pressure upon the piston assembly exceeds a first level, and when a fluidic pressure upon the piston assembly falls below a second level. Upon collapse of the collapsible member, the valve member releases the valve member, allowing the valve member to move to a different selected position (such as closed or open, respectively). A third piston member and a biasing member thereon can also be utilized. In some embodiments, a fluid is preferably held in compression between selected piston members.

Methods and systems are provided for an electric heavy-duty vehicle. In one example, a system for the vehicle may include a wheel hub assembly coupled to a frame of the vehicle via a first wishbone arm and a second wishbone arm, and an air spring coupled at opposite ends to a first link and a second link, each of the first link and the second link being pivotably coupled to the frame of the vehicle, the second link further being pivotably coupled to the first wishbone arm. The air spring may be positioned above the wheel hub assembly with respect to the vehicle.

A method of producing a polypropylene resin in-mold expanded product, includes: placing polypropylene resin particles obtained from a base material resin having a melting point of 140° C. to 150° C., the base material resin comprising: a polypropylene resin A comprising 3 weight % to 15 weight % of 1-butene and haying a melting point of 130° C. to 140° C.; and a polypropylene resin B having a melting point of 145° C. to 165° C., water, and an inorganic gas foaming agent in a pressure-resistant container, forming a mixture, dispersing the polypropylene resin particles while stirring the mixture, obtaining a dispersion liquid, increasing a temperature and a pressure in the pressure-resistant container, releasing the dispersion liquid from the pressure-resistant container into a region having a pressure lower than the pressure in the pressure-resistant container, producing expanded polypropylene resin particles; and filling a mold with the expanded polypropylene resin particles, and then heating the expanded polypropylene resin particles.