Rotary expansible chamber devices inventions 10/08

20080260562 - Water-injected screw compressor element: Improved water-injected screw compressor element which mainly consists of a housing (2) on the one hand, confining a rotor chamber (5) with an inlet (6) on one far end and an outlet (7) on the other far end and in which two co-operating rotors (3,4) are provided which are bearing-mounted... Agent: Bacon & Thomas, PLLC

20080260563 - Pumps: A pump, in particular a sliding-vane pump, a roller cell pump, or a gear pump includes a rotating assembly, with, amongst other things, a rotor with radially-sliding vanes, rollers or gears and a drive shaft is provided. The rotor or a gearwheel is connected to the drive shaft by a... Agent: Davidson, Davidson & Kappel, LLC

20080260562 - Water-injected screw compressor element: Improved water-injected screw compressor element which mainly consists of a housing (2) on the one hand, confining a rotor chamber (5) with an inlet (6) on one far end and an outlet (7) on the other far end and in which two co-operating rotors (3,4) are provided which are bearing-mounted... Agent: Bacon & Thomas, PLLC

20080260563 - Pumps: A pump, in particular a sliding-vane pump, a roller cell pump, or a gear pump includes a rotating assembly, with, amongst other things, a rotor with radially-sliding vanes, rollers or gears and a drive shaft is provided. The rotor or a gearwheel is connected to the drive shaft by a... Agent: Davidson, Davidson & Kappel, LLC

20080253913 - Vane pump: The invention relates to a vane pump comprising a rotor which is arranged therein, rotatably driven by a drive shaft. The rotor is provided with several grooves which are distributed through the circumference thereof and which extend substantially radially with respect to the axis of rotation of the rotor. In... Agent: Ronald E. Greigg Greigg & Greigg P.l.l.c.

20080253914 - Liquid injection type screw compressor: The liquid injection screw compressor has the male and female rotor pair of screw rotors, the rotor casing (1a, 1b) having a bore for receiving the rotors, a gas suction opening and a gas outlet that are provided in both end sections of the casing and communicate with the bore,... Agent: Rossi, Kimms & Mcdowell LLP.

20080253915 - Self-aligning rotary pistone machine: A rotary piston machine comprising a cylinder (13) provided with two ends to form a stator, inlet and outlet apertures disposed in the stator, a rotor (1) eccentrically mounted within the stator, and at least one vane (11a, b, c, d) connected to the rotor and in communication with the... Agent: Brooks Kushman P.C.

20080247894 - Vane pump using line pressure to directly regulate displacement: A variable displacement vane pump includes at least two regulation chambers to provide a regulating force to the cam ring, to counter the force applied to the cam ring by a regulating spring, to reduce pulsation in the output working fluid from the pump. A first one of the chambers... Agent: Harness, Dickey & Pierce, P.L.C

20080247895 - Injection molded scroll form: Scrolls made from injection molding processes are disclosed. The scroll components have a tip seal groove defined within an involute portion of the scroll. Bearing and tip seal engaging plates are integrally molded within base members of the scroll.... Agent: Harness, Dickey & Pierce, P.L.C

20080247896 - Fluoropolymer-containing films for use with positive-displacement fluid pumps: A positive-displacement pump comprising a housing, a rotatable component disposed at least partially within the housing, and a film disposed at least partially between the housing and the rotatable component, where the film comprises a reinforcing material and a fluoropolymer material.... Agent: Kinney & Lange, P.A.

20080247897 - Hydrogen g-cycle rotary internal combustion engine: A hydrogen G-cycle rotary vane internal combustion engine has a sodium vapor chamber transferring excess combustion heat into combustion chambers. An active water cooling system captures heat from the engine housing stator, rotor, and sliding vanes and transfers it back into the combustion cycle by premixing it with hydrogen to... Agent: Aquilla Patents & Marks, PLLC

20080240953 - Rotary compressor unit and method of controlling operation thereof: The compressor unit having at least two compressors, for example a low pressure stage compressor 11 and a high pressure stage compressor 12 connected in series, of which the low pressure sage compressor 11 and high pressure stage compressor 12 are driven by driving devices 13 and 14 respectively separately... Agent: Rossi, Kimms & Mcdowell LLP.

20080240954 - Rotary compressor: There is provided a two-stage compression rotary compressor in which the balancer mass of a rotor can be made as small as possible, and the moments that tilt the whole of a shaft can be balanced. The axial length L2 of a high-stage side crankshaft 72 corresponding to a high-stage... Agent: Kanesaka Berner And Partners LLP

20080240955 - Hydraulic pump: A hydraulic pump includes a cylinder block having a cylinder, a rotor rotatable in the cylinder, and a vane movable in a radial direction of the rotor and biased to the rotor. The vane, the cylinder, and the rotor thereamong define an operation chamber. The rotor draws fluid into the... Agent: Harness, Dickey & Pierce, P.L.C

20080240956 - Scroll fluid machine: a plurality of second plate sprigs 112c and 112d that connects the intermediate ring and the stationary scroll 58, while supporting the intermediate ring 110 so as to enable the intermediate ring 110 to move in a second direction orthogonal to the rotation axis (of the machine) as well as... Agent: Rossi, Kimms & Mcdowell LLP.

20080240957 - Scroll fluid machine: The object is to provide a scroll fluid machine in which relative revolving motion is produced between two scrolls engaging with each other without using conventional Oldham coupling or pin crank type mechanism which has sliding parts. The scroll compressor 50 comprises a stationary scroll 58 fixed to a scroll... Agent: Rossi, Kimms & Mcdowell LLP.

20080240958 - Rotary fluid machine: A rotary fluid machine includes a first rotation mechanism and a second rotation mechanism. Each of them includes a cylinder having a cylinder chamber and an annular piston which is contained in the cylinder chamber and divides the cylinder chamber into an outer working chamber and an inner working chamber.... Agent: GlobalIPCounselors, LLP

20080240959 - Brake releasing mechanism and brake system: An embodiment of a gerotor apparatus includes a housing including a first member. The first member includes a brake pin aperture formed therein. The apparatus also includes a brake pin at least partially interposed within the first member. The brake pin includes a first annular surface and a second annular... Agent: Rader, Fishman & Grauer PLLC

20080240960 - Pump: A pump assembly including a gerotor pump having an inlet and an outlet, and comprising an annulus and a lobed rotor, one, but not both, of the rotor or annulus being split axially into two parts, the pump further comprising indexing means for angularly shifting one part relative to the... Agent: Jones, Walker, Waechter, Poitevent, Carrere & Denegre, L.L.P.

20080240961 - Swing compressor: A piston has a generally cylindrical-shaped roller and a blade that is integrally formed with the roller. The piston 4 performs a swing motion while orbitally revolving within a cylinder chamber of a cylinder. A light-load side portion of an inner circumferential sliding surface of the roller is provided as... Agent: GlobalIPCounselors, LLP

20080240962 - Gas vane pump, and method of operating the pump: A gas vane pump wherein a lubricant is intermittently introduced into a housing 10 during rotation of a rotor 40, through a lubricant supply passage 100 formed through the housing and the rotor, and the relative position between the rotor having a diametric hole 112 and the housing having a... Agent: Oliff & Berridge, PLC

20080240963 - Rotor shaft sealing structure for oil-free rotary compressor: A rotor shaft sealing structure of an oil-free rotary compressor is provided, with which is reduced a risk of occurrence of lubrication oil intrusion into the compression chamber (9) of the compressor which is liable to occur when negative pressure is produced in the compression chamber (9). The rotor shaft... Agent: Rossi, Kimms & Mcdowell LLP.

20080240964 - Shaft seal device for oil-free rotary compressor: A shaft seal device is provided, with which an optimum radial clearance is always maintained between the inner circumferential surface of a carbon ring and an outer circumferential surface of a rotor shaft sleeve when temperature thereof varies in operation of the oil-free rotary compressor, and gas leak through the... Agent: Rossi, Kimms & Mcdowell LLP.

20080240965 - Rotor shaft sealing method and structure of oil-free rotary compressor: A rotor shaft sealing method for an oil-free rotary compressor is provided, with which occurrence of lubrication oil intrusion into the compression chamber of the compressor which is liable to occur when negative pressure is produced in the compression chamber, is prevented. With a rotor shaft sealing structure composed such... Agent: Rossi, Kimms & Mcdowell LLP.

20080240966 - Hydraulic machine: The invention concerns a hydraulic machine (1) with an externally toothed gear wheel (2) and an internally toothed ring (3), which is made of a sintered material or of a ceramic material. It is endeavored to provide good operation behaviour at low costs. For this purpose, the toothed ring (3)... Agent: Mccormick, Paulding & Huber LLP

20080240967 - Rotary displacement machines having rotors of asymmetrical profile: on the other hand, said connecting segment has a second predetermined dimension in a direction radial to the longitudinal axis of that of the twinned rotors under consideration such that the ratio of the second dimension over the first dimension ranges between 0.005 and 0.1 (five thousandths and one tenth).... Agent: Oliff & Berridge, PLC

20080240968 - Low cost gear fuel pump: The present invention is directed to a gear pump having a housing (10′) with an interior pumping chamber (200) and an inlet (40′) to and outlet (42′) from the chamber, the outlet being spaced from the inlet. A pair of rotating gears (330,332) is located in the chamber, the gears... Agent: Fay Sharpe LLP