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| Number | Title | Issue Date |
| 6290477 | Scroll vacuum pump The scroll pump has the capability of preserving a minimal play between the joints disposed on the ridges of each of the spiraling walls and the flat wall facing it. Such an arrangement, possible owing to the slight difference in pressure prevailing betwe... | 09/18/2001 |
| 6079965 | Cylinder, for a rolling piston compressor A slit, spanning a distance across the top of the vane slot in a cylinder for a rolling piston compressor, safely distributes the stress which occurs in the vane slot. The slit opens onto the bore, in the cylinder, which is provided for a rotary shaft and... | 06/27/2000 |
| 5389411 | Composite structure forming a wear surface A pre-stressed composite liner structure is provided for tribological syss typically associated a pump, engine, compressor or systems having bearings rotating within a journal. A hollowed ceramic core is concentrically wound with cladding material in the... | 02/14/1995 |
| 4975031 | Rotary compressor with compliant impact surfaces Objectionable noise in a rotary compressor is reduced by placing cavities in the sliding vane and/or the rolling piston. The cavities are used to change the local compliance of surfaces which impact one another to generate the objectionable noise. The cha... | 12/04/1990 |
| 4960372 | Compressor with an isolated vane slot A rotary compressor includes a cylinder with a cylindrical compression chamber. A cylindrical piston is eccentrically movable within the chamber. A vane slot extends outwardly in the cylinder from and communicates with the chamber. A vane is reciprocating... | 10/02/1990 |
| 4938668 | Rotating piston machine A rotating piston machine has a casing 2 with a shaft 5 borne in the casing 2. In an annular space 1 there are arranged rotating elements which bear in sealing manner against the walls of the annular space 1. Each rotating element (3, 4) has four outwardl... | 07/03/1990 |
| 4540354 | Rotary fuel pump A rotary pump for pumping liquid which includes a rotor combination in the form of a vane pump or gear and rotor with pumping chambers disposed circumferentially around the rotor. The chambers progressively increase in the inlet area and ensmall in the ou... | 09/10/1985 |
| 4082480 | Fluid pressure device and improved Geroler.RTM. for use therein A rotary fluid pressure device such as a motor or pump of the type utilizing a Geroler.RTM. gear set. The internal teeth of the Geroler.RTM. are tubular members mounted on bearings to be slightly movable. Between each adjacent pair of tubular teeth is a c... | 04/04/1978 |
