Rotary expansible chamber devices inventions 08/08

20080206082 - Closed compressor and refrigerating cycle apparatus: A closed compressor includes a closed case in which a plurality of compression mechanism sections are accommodated, the compression mechanism section having a cylinder including a cylinder chamber eccentrically rotatably accommodating a roller, the compression mechanism section including a blade having a leading edge to divide the cylinder chamber into... Agent: Dla Piper Us LLP

20080206083 - Seal system and scroll type fluid machine: Durability of a seal member is improved by reducing a surface pressure thereon. A seal mechanism 24 is provided between a backpressure plate 16 and a holder 17 so as to surround an orbiting backpressure chamber 18. The seal member 24 comprises a seal attachment groove 25, a seal member... Agent: Wenderoth, Lind & Ponack, L.l.p.

20080206084 - Compressor and oil separation device therefor: A compressor and oil separation device therefore are provided. The oil separation device is integrated with a compressor and includes a first case having a refrigerant inlet into which a refrigerant mixed with oil is sucked and an oil recollecting member through which oil separated from the refrigerant flows, and... Agent: Ked & Associates, LLP

20080206085 - Oil-injected compressor with means for oil temperature regulation: The invention relates to an oil-injected compressor, in particular, an oil-injected mobile screw compressor with a motor-driven compressor unit, for the generation of compressed air cooperating with an oil circuit for lubrication, the oil tank of which is housed in a subsequent oil separator device for separating the oil from... Agent: Barnes & Thornburg LLP

20080206086 - Slide valve: A compressor (20) has at least a first rotor (26; 28) at least partially within a bore (276; 278) of a housing. A slide valve element (102; 300) is positioned at least partially within a channel (200; 301) in the housing and has a first surface facing the first rotor.... Agent: Bachman & Lapointe, P.c. (utc)

20080199338 - Multistage compression type rotary compressor: An object is to provide a high inner pressure type multistage compression rotary compressor capable of avoiding beforehand generation of vane fly of a second rotary compression element and realizing a stabilized operation, the rotary compressor includes a communication path which connects an intermediate pressure region to a region having... Agent: Kratz, Quintos & Hanson, LLP

20080199339 - Safe backspin device: A safe backspin device is provided to prevent uncontrolled backspin during operation of a progressive cavity pump. The safe backspin device has a bore and in one embodiment a ball that seats within the bore that act as a check valve. The check valve allows for unrestricted fluid flow in... Agent: Dykas, Shaver & Nipper, LLP

20080199340 - Screw displacement pump: The invention relates to a screw pump of single-entry, double-shaft construction with an external bearing of the two screw shafts (1, 2) and a pump housing (3) enclosing the screw shafts (1, 2) by forming feed chambers (4) and externally delimiting the feed chambers (4) with its internal shell surface... Agent: Greenblum & Bernstein, P.L.C

20080199341 - Motor and method of operating the same: A motor and a method of operating the motor are described. The motor may have a female rotor shaft having mounted thereon a female compression rotor, a female power rotor, and a spur gear. The motor may also have a male rotor shaft having mounted thereon a male compression rotor,... Agent: Marshall & Melhorn, LLC

20080199342 - Vacuum pump for vehicle motors and a one-way valve for said vacuum pump: The invention relates to a vacuum pump (1) for vehicle motors, comprising a stator (2), a chamber defined within said stator (2) and at least one vane rotatably mounted inside said chamber so as to generate a depression. The stator (2) comprises inlet openings for air and oil, and a... Agent: Husch Blackwell Sanders LLP

20080193309 - Screw pump rotor and method of reducing slip flow: A pump rotor for a screw pump includes a shaft, a first set of threads disposed on a portion of an outer surface of the shaft, at least one thread of the first set of threads including a groove disposed on an end portion thereof, and a ring seal disposed... Agent: General Electric Co. Global Patent Operation

20080193310 - Capacity varying type rotary compressor and refrigeration system having the same: A capacity varying type rotary compressor and a refrigeration system having the same. The capacity varying type rotary compressor comprises a casing containing a certain amount of oil and maintaining a discharge pressure state; a motor installed in the casing and generating a driving force; one or more cylinder assembly... Agent: Ked & Associates, LLP

20080193311 - Multi-shaft vacuum pump with circular translation cycle: The invention relates to a vacuum pump comprising: a fixed disc (8) which is solidly connected to a fixed body (2) and which is equipped with a spiral-shaped element (14); a movable disc (4) facing the fixed disc (8) and having a spiral-shaped element (16) which is interleaved with the... Agent: Young & Thompson

20080193312 - Scroll compressor with discharge valve: A scroll compressor includes an orbiting scroll member having an orbiting end plate defining a discharge port and an orbiting spiral wrap extending from the orbiting end plate. The compressor also includes a non-orbiting scroll member having a non-orbiting end plate and a non-orbiting spiral wrap extending from the non-orbiting... Agent: Harness, Dickey & Pierce, P.L.C

20080193313 - Scroll compressor: In the present invention, an orbiting scroll 31 that has spiral teeth 31L and 31M on two surfaces, and a fixed scrolls 33 and 34 that are installed so as to face the surfaces of the orbiting scroll 31 and that have spiral teeth 33E and 34E that intermesh with... Agent: Leydig Voit & Mayer, Ltd

20080193314 - Rotary compressor: A rotary compressor including a housing having first and second compressing chambers separated from each other, first and second flanges coupled to the housing, to close the first and second compressing chambers, respectively, an intermediate plate to separate the first and second compressing chambers from each other, first and second... Agent: Staas & Halsey LLP

20080193316 - Roots pump: A roots pump including a pair of multi-lobe rotors is disclosed. The pair of rotors each include a first straight portion and a second straight portion. The first straight portion is provided on one of end portions of the rotary shaft of the rotor in an axial direction to extend... Agent: Knoble, Yoshida & Dunleavy

20080193315 - Roots-type fluid machine: A roots-type fluid machine including a set of rotors and a rotor housing is disclosed. The rotor housing accommodates the rotors and has a suction space. The set of rotors mesh with each other and rotate in the rotor housing so that fluid is drawn into the suction space and... Agent: Knoble, Yoshida & Dunleavy

20080193317 - Screw rotor and screw fluid machine: The object of the invention is to provide a screw type fluid machine in which leak of gas is kept in constant, in other words, in which a gap between the screw rotors is kept substantially in constant in a discharging chamber during operation. In a screw type fluid machine,... Agent: Panitch Schwarze Belisario & Nadel LLP

20080187450 - Crescent gear pump with novel rotor set: A novel crescent gear pump and pump rotor set for a crescent gear pump. The rotor set includes an outer rotor with teeth having a composite profile formed over the portion adjacent their root to conform to a circular arc and formed over the portion adjacent their tip to conform... Agent: Magna International, Inc.

20080187451 - Feed unit: A feed unit for a fuel pup includes a rotor eccentrically mounted in a pump chamber, and a plurality of grooves disposed on the periphery of the rotor. The grooves receive a plurality of sealing bodies which extend from within the grooves to an annular wall of the pump chamber... Agent: Ronald E. Greigg Greigg & Greigg P.l.l.c.