Rotary expansible chamber devices inventions 07/07

20070172370 - Capacity control device and capacity control method for screw compressor: An object of the invention is to provide a capacity control device of a screw compressor capable of restraining the consumption of components such as a suction throttle valve and of extending the life of the components. According to the present invention, there is provided a capacity control device of... Agent: Antonelli, Terry, Stout & Kraus, LLP

20070172371 - Positive displacement motor/progressive cavity pump: Disclosed is a progressive cavity device. In some embodiments, the device includes a stator with an inner surface having a number of lobes and a rotor disposed within the stator and having a different number of lobes. The stator lobes define a major diameter and a minor diameter, where the... Agent: Conley Rose, P.C. David A. Rose

20070172372 - Scroll fluid machine: In a scroll fluid machine, a fixed scroll has a fixed wrap, and an orbiting scroll has an orbiting wrap which engages with the fixed wrap to form a compressing chamber between the orbiting and fixed wraps. The orbiting scroll is rotatably mounted around an eccentric axial portion of a... Agent: Ostrolenk Faber Gerb & Soffen

20070172373 - Scroll-type fluid displacement apparatus with fully compliant floating scrolls: A central drive shaft-sliding knuckle combined with a peripheral crank pin-swing link mechanism (CSPS) to provide an orbiting scroll with radial and axial compliant capability. The CSPS mechanism can be applied to both dual floating scroll and single floating scroll structures to improve performances of scroll devices, particularly in oil-free... Agent: Hamre, Schumann, Mueller & Larson, P.C.

20070172374 - Expander: A cylinder 2, a roller 4, an upper bearing member 7 and a lower bearing member 8 form a space, the space is partitioned by a vane 5 into working chambers 12. Working fluid is sucked into the working chamber 12 through a suction hole 7c, the working fluid is... Agent: Armstrong, Kratz, Quintos, Hanson & Brooks, LLP

20070172375 - Non-eccentric devices: The present invention is an apparatus that includes a chamber rotor with a chamber and an extension rotor with an extension. The rotors are housed in a rotor case. A pressure cavity is at least transiently formed by the extension rotor and the chamber rotor. The present invention also includes... Agent: Dobrusin & Thennisch PC

20070172376 - Vacuum pump: A shaft seal structure (17) is provided around an outer circumferential surface of the bearing member (16M, 16FM) located on the cylinder inside of each of the screw rotors (13M, 13FM). The shaft seal structure (17) forms a static pressure seal. A seal gas is introduced between the outer circumferential... Agent: Foley And Lardner LLP Suite 500

20070166182 - Pneumatic tool: A pneumatic tool is provided with a cylinder assembly. The cylinder assembly includes a cylinder, two steel plates and two covers. The cylinder defines an axial bore, two grooves on an external side and two groups of intakes in communication with the axial bore. Each of the steel plates defines... Agent: Kamrath & Associates P.A.

20070160486 - Rotary compressor: Disclosed is a rotary compressor having two compression capacities in clockwise and counterclockwise directions. The rotary compressor includes: a driving shaft (13) being rotatable clockwise and counterclockwise, and having an eccentric portion (13a) of a predetermined size; a cylinder (21) having a predetermined inner volume; roller (22) installed rotatably on... Agent: Ked & Associates, LLP

20070160487 - Rotary combustion apparatus: A combustion apparatus having a housing including an inner surface that defines at least one chamber, a rotor, a rotor shaft, an intake shaft, an exhaust shaft, and a gearing mechanism. The chamber includes an intake valve port and an exhaust valve port, and the rotor shaft is coupled to... Agent: Seed Intellectual Property Law Group PLLC

20070160488 - Scroll compressor: A scroll compressor is provided. The scroll compressor includes a casing, an oil pump, an oil retrieving port, and an oil retrieving unit. The casing has a fluid storage area in a lower portion thereof. The oil pump is provided in the lower portion of the casing, and has a... Agent: Ked & Associates, LLP

20070160489 - Oil pump for a compressor: An oil pump for a compressor is provided. The oil pump includes a pump body coupled to a driving shaft, and a pumping member coupled to the pump body so as to define a pumping part and a pump cover is coupled to a lower side of the pump body... Agent: Ked & Associates, LLP

20070154337 - Scroll compressor with externally installed thermostat: A thermostat for sensing an unduly high temperature in a sealed compressor, which is a scroll compressor in the disclosed embodiment, extends through the housing of the sealed compressor into the body of a non-orbiting scroll. Since the thermostat extends through the housing, the wires need not be sealed as... Agent: Carlson, Gaskey & Olds, P.C.