F - Mech Eng,Light,Heat,Weapons – 15 – B
Patent
F - Mech Eng,Light,Heat,Weapons
15
B
138/82
F15B 15/14 (2006.01)
Patent
CA 1040065
"CYLINDER-PISTON COMBINATION, PARTICULARLY FOR HIGH-PRESSURE APPLICATION" ABSTRACT OF THE DISCLOSURE. A sealing tube which is at least partly elastic is secured at its ends to a piston part and a cylinder part of the combination, respectively, to form a leakproof, sealed connection for introduction of a working pressure fluid between the cylinder and the head of the piston, the sealing tube having the end which is relatively movable with respect to one of the parts connected to the other part by means of a transition zone which extends in the direction of movement, the sealing tube and at least a portion of the transition zone having a low-friction surface which is preferably durable and, additionally, may be regenerated, for example by the intro- duction of pressurized lubricant to form a hydrostatic bearing and spacing the transition zone from the stationary part. The pressure in the hydrostatic bearing is balanced against the pressure of the working fluid by a self-adjusting throttling choke formed by the gap between the deformed sealing tube, when under pressure of the working fluid, and the pressure of the lubricant, so that a pressure balance at the transition zone will arise supporting the sealing tube within the stationary part with the interposition of the pressurized fluid. If only low friction surfaces are used, then polytetrafluoroethylene or similar surfaces on the tube and/or the relatively movable part may be applied thereto.
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