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1007results about How to "Prevent reversal" patented technology

Anti-inversion trocar seal

The invention is directed to a trocar seal adapted to form a seal around a surgical instrument, the trocar seal comprising a housing having an axis extending between a proximal end and a distal end and forming a working channel sized and configured to receive the surgical instrument; an elastomeric septum seal having a proximal face and a distal face, the septum seal being disposed in the housing and extending transverse to the axis of the housing across the working channel; portions of the septum seal defining a hole having a diameter less than or equal to the diameter of the surgical instrument so that during insertion of the instrument along the working channel the septum seal forms a seal with the instrument; and at least one structure formed integrally with or proximate to the septum seal to prevent inversion of the septum seal upon withdrawal of the surgical instrument. The septum seal or the housing may further comprise a sidewall to include the structure extending from the sidewall to the distal face of the seal to tether the seal distally. The structure may be integrally formed with the proximal face of the septum seal to reinforce the seal, or the structure may be integrally formed with the distal face of the septum seal to tether the seal distally. The structure may be an annular reinforcement or rib, and is formed so as to allow side-to-side movement or floatation of the seal. The trocar seal may further comprise a plurality of radially extending ribs formed on the proximal or distal face of the septum seal to reinforce the seal. The trocar seal may further comprise a tensile element formed on the distal face of the septum seal.
Owner:MINEBEA CO LTD +1

Shoe, ankle orthosis and method for protecting the ankle

An improved athletic shoe, ankle orthosis and method for protecting the ankle against injury, limit subtalar joint motion of the ankle by controlling the motions of segments of the subtalar joint fore and aft of the subtalar joint while permitting motion of the foot about the ankle joint. A supporting structure a part of or connected to the shoe or orthosis is preferably in the form of a heel-sole counter provided about the heel and at least a portion of the foot forward of the subtalar joint. The supporting structure has a semi-rigid shape retaining character which is not collapsible vertically and which together with the shoe or orthosis limits torsional movement of the foot about the longitudinal axis of the subtalar joint as seen in a top plan view thereof by an upwardly extending portion thereof which acts as a torsion bar that is, in turn, secured to the lower leg. Preferably, the torsion bar has directional properties for resisting bending which are most rigid in a direction orthogonal or nearly orthogonal to the longitudinal axis of the subtalar joint. In a disclosed embodiment of the shoe motion of the midtarsal joint is also limited by the supporting structure to aid in limiting subtalar joint motion and shoe rollover. The shoe is secured to the foot by way of a strap arrangement which applies a force to the foot in a direction which, together with the heel-sole counter opposes the subtalar joint motion in supination.
Owner:TOWNSEND BARRY W +1

Electrohydraulic energy-regenerative type shock absorber

The invention relates to an electrohydraulic energy-regenerative type shock absorber, which comprises a hydraulic circuit, a working chamber and a piston, wherein the working chamber is divided into a piston working cavity and an accumulating power-generating cavity by a partition plate (13), and the piston is positioned in the piston working cavity and is connected with an external upper mounting base (7) through a piston push rod (8); a hydraulic motor (4) is positioned in the energy storage power-generating cavity and is connected with an external rotary generator (5) through a driving shaft, and an accumulator (3) is positioned in the accumulating power-generating cavity and is positioned below the partition plate (13); and the hydraulic circuit and a plurality of one-way valves (6) form a hydraulic rectifier bridge, and the hydraulic circuit adopts the method that an external pipeline is arranged outside the piston or the piston is designed to form internal and external cavities. The invention has simple structure, fewer components and small volume, can allow the energy generated by vehicle vibration to be fully used for doing work, can effectively recover vibration energy, has better shock absorbing effect than the existing shock absorber, and also prolongs the service life of the generator.
Owner:武汉经开科创运营有限公司

Electrohydraulic energy regenerative vibration absorber

The invention relates to an electrohydraulic energy regenerative vibration absorber, which comprises a piston, a hydraulic check bridge, an accumulator, a hydraulic motor and a rotary generator. A vibration absorber cavity is divided into a rodless cavity (11) and a rod cavity (12) by a piston and a piston push rod (16); the two cavities are provided with an oil outlet and an oil inlet respectively; each oil outlet and each oil inlet are provided with a one-way valve; the one-way valve and a pipeline which is connected with the one-way valve form the hydraulic check bridge; the accumulator is connected in parallel on a connecting pipeline between two oil outlets and an oil inlet of the hydraulic motor; a volume conversion bridge (5) is connected in parallel on a pipeline between the oil outlet of the hydraulic motor and two oil inlets of the vibration absorber cavity; and the volume conversion bridge consists of two one-way valves and an oil tank which is connected with the one-way valves. The electrohydraulic energy regenerative vibration absorber meets the damping force requirement of an automobile vibration absorber, and can convert the ground vibration into direction-invariable rotary movement to drive the generator to generate power and actively control the damping of the vibration absorber by controlling the generator load.
Owner:WUHAN UNIV OF TECH
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