Expansible chamber devices inventions 11/07

20070272076 - Copper alloy piston shoe: A swash plate type compressor is disclosed, wherein a shoe, having a first surface slidably disposed on a swash plate and a second surface received in a pocket formed in a piston, is formed from a copper alloy.... Agent: Fraser Clemens Martin & Miller LLC

20070272078 - Piston device for internal combustion engine: A top ring has gas seal and oil control functions realizing approximately the same amount of oil consumption and blow-by gas as realized by three rings. A piston assembly includes a piston body having a top land portion and a ring groove on its periphery, and a piston ring having... Agent: Blackwell Sanders LLP

20070261547 - Hydrostatic axial piston machine and use of said machine: The invention relates to a hydrostatic axial piston machine having a cylinder block which can be rotated about a first axis, the cylinder block being provided with a plurality of cylinder bores which extend in the axial direction and which are arranged on a partial circle which is concentric in... Agent: The Webb Law Firm, P.C.

20070256554 - Hydraulic tool with wobble plate transmission: A hydraulic tool including a motor; a hydraulic pump comprising only one reciprocating piston pump member; and a transmission connecting the motor to the hydraulic pump. The transmission includes a wobble plate and at least one spring. The wobble plate includes a front end pivotably connected to a frame of... Agent: Harrington & Smith, PC

20070256556 - Pump having double reverse seal to eliminate leaking and binding: A seal assembly which generally includes a first annular seal member having a bent lip portion defining a central opening, a second annular seal member having a bent lip portion defining a central opening and an annular spacer sandwiched between the first and second seal members, wherein the lip portions... Agent: Hoffmann & Baron, LLP

20070256557 - Sealing device: To make it unnecessary to insert a plate spring as a separate part between a metal ring (2) and a mating member (11) to be coupled therewith such as a clutch plate, and reduce the number of parts and the assembly manhours, the sealing device (1) includes the metal ring... Agent: Harness, Dickey & Pierce, P.L.C

20070251379 - Air compression apparatus and method of use: An air compression apparatus has a frame, a tank, and a motor A drive mechanism is operably connected to the motor and at least one piston assembly is operably connected to the drive mechanism and configured to move within a respective cylinder mounted to the frame. The piston assembly includes:... Agent: Jeromye V. Sartain Mind Law Firm

20070251380 - Piston: A part of a rubber layer of the base section of a piston seal is replaced with a reinforcement ring with high rigidity, and a part of the reinforcement ring reaches the root of a seal lip. This provides the piston seal with required rigidity. Further, providing an outer diameter... Agent: Harness, Dickey & Pierce, P.L.C