Patents in subclass Pumps/Materials Digest
Parent class: Pumps
| Number | Patent title | Issue Date |
|---|---|---|
| 07134851 | Reciprocating pump having a ceramic piston Various embodiments of the invention, therefore, provide pumps, and methods for their production. One exemplary embodiment of the invention comprises a ceramic plunger pump assembly. The pump assembly can include a pump body, which... |
11/14/2006 |
| 06874325 | Compressor and refrigerant system device using the same The present specification discloses a compressor characterized in that a nonpolar solvent is used as a working fluid and an insulation part of a rotating section is formed from a low dielectric constant plastic film having a specific... |
04/05/2005 |
| 06598421 | Compressor and refrigeration system The present specification discloses a compressor characterized in that a nonpolar solvent is used as a working fluid and an insulation part of a rotating section is formed from a low dielectric constant plastic film having a specific... |
07/29/2003 |
| 06511304 | Radial plunger machine A radial plunger machine is disclosed. The radial plunger machine includes a pintle and a rotor which is rotatable about said pintle, at least one radial cylinder bore being provided in the rotor, a plunger being reciprocably arranged in... |
01/28/2003 |
| 06478551 | Gas compressor having enlarged discharge chamber An air conditioning compressor is equipped with an oil separator for separating high-pressure refrigerant gas and lubrication oil into a gas component and an oil component. The compressor's casing has a barrel portion surrounding an outer... |
11/12/2002 |
| 06457947 | Piston compressor for refrigerant, with thermal insulation A compressor for an air conditioning system in an automobile, having a housing (1) and a compressor unit (2) accommodated in the housing (1) for taking in and compressing a refrigerant. The refrigerant flows from an intake area (4)... |
10/01/2002 |
| 06293764 | Reciprocating compressor with dry lubricating system The compressor contains at least one piston (5) guided in a dry-running manner which, together with a cylinder insert (33), bounds a ring gap which is open over the common longitudinal section in each case and permits a leakage flow of... |
09/25/2001 |
| 6082495 | Scroll compressor bearing lubrication A scroll-type machine is disclosed which incorporates a lubricant impregnated drive bushing. The lubricant utilized for the impregnation process will preferably be of a type which is insoluble in the fluid being handled by the scroll-type... |
07/04/2000 |
| 5902096 | Diaphragm pump having multiple rigid layers with inlet and outlet check valves An integral valve diaphragm pump has a first rigid layer, a second rigid layer and a flexible membrane therebetween. Concave surfaces in the two rigid layers form a pump. The pump includes an actuating chamber which is alternately... |
05/11/1999 |
| 5876190 | Vacuum membrane pump and a head portion for a vacuum membrane pump A vacuum membrane pump includes a housing, a membrane and a head portion having a sealing surface which engages with a sealing edge of the membrane to form a seal. A pump chamber is formed between the head portion and the membrane. The... |
03/02/1999 |
| 5806336 | Refrigeration apparatus and lubricating oil composition There are provided a highly durable and efficient refrigerating apparatus and a lubricating oil composition that uses an HFC type refrigerant and is still free from the problem of thermal hydrolysis of polyol-ester type oil and resulting... |
09/15/1998 |
| 5671656 | Paint pump fluid section An improved fluid section for piston type paint pumps having the piston made from unplated stainless steel and wherein the seal is a multiple lip type formed of ultra-high molecular weight polyethylene and the seal further includes one or... |
09/30/1997 |
| 5649813 | Chamber insulation for prevention of icing in air motors Insulation is provided in the form of wall insulation, piston or diaphragm insulation and/or piston rod and/or diaphragm washer insulation to increase the temperature in the working air chamber of an air motor of the piston or diaphragm... |
07/22/1997 |
| 5622479 | Composite device for a fluid system of a vehicle A device (10), and a method for forming such a device (10), for a fluid system for a vehicle, comprises first and second members (12, 13). The first member (12) is adapted for direct mounting on the chassis or engine of a vehicle (11);... |
04/22/1997 |
| 5611681 | Reciprocating rod type pump for shear sensitive material A pump for pumping shear sensitive material comprising a housing having an internal displacement chamber and a displacement rod. The displacement rod is reciprocable within the displacement chamber and the displacement chamber having an... |
03/18/1997 |
| 5607291 | Closed compressor A closed compressor includes a closed vessel made of steel and a vapor-liquid separator connected to the closed vessel. The closed vessel and the vapor-liquid separator have a discharge steel pipe and a suction steel pipe, respectively,... |
03/04/1997 |
| 5573385 | Dual chamber pump The present invention provides an improved design for a mechanical pump.The pump is a dual chamber design typically including a pair of expandablebellows driven in a reciprocating fashion by a supply of pressurized air.The use of expandable bellows... |
11/12/1996 |
| 5567131 | Spring biased check valve for an electromagnetically driven oscillating pump A valve assembly is disclosed for an oscillating pump of the type having areciprocating armature carrying an impeller that defines a pump chamberfor flow of fluid through the pump. The valve assembly includes a valvebody mounted to the impeller, a... |
10/22/1996 |
| 5547351 | Low pressure low volume liquid pump A diaphragm pump which provides a low internal volume and minimizes volumecontributions for applications which require the transfer of fluid volumeson the order of one to several microliters. The pump includes a plungerwhich reciprocates within a... |
08/20/1996 |
| 5531574 | Closed-type compressor A closed-type compressor includes a closed casing accommodating an electricmotor from which a rotational shaft extends and a compressing machine tobe operated by the motor and the compressing machine is of areciprocating-type and provided with... |
07/02/1996 |
| 5509789 | Liquid ring pump having a sheet metal working chamber casing Single-stage liquid ring gas pump which can be flanged to a drive unit. Thesuction and delivery connections are disposed on a connection casing (3)which is to be connected to the drive unit. On the side of the connectioncasing remote from the drive... |
04/23/1996 |
| 5494420 | Rotary and reciprocating pump with self-aligning connection A self-aligning connection between a rotary and reciprocating pump pistonallows relative radial movement between the pump piston and the rotarycam. The self-aligning connection is formed by a pin carried by the rotarycam and is positioned in a... |
02/27/1996 |
| 5489195 | Liquid ring pump having a sheet metal valve plate Liquid-ring gas pump with a working chamber in which an impeller (6)rotates and which is bounded axially by a control plate (7) past which theimpeller (6) moves with a small clearance and which has at least oneintake and/or discharge opening (21,... |
02/06/1996 |
| 5480292 | Dual chamber pump The present invention provides an improved design for a mechanical pump.The pump is a dual chamber design typically including a pair of expandablebellows driven in a reciprocating fashion by a supply of pressurized air.The use of expandable bellows... |
01/02/1996 |
| 5397220 | Canned motor pump A canned motor pump having an enclosing casing on the inside of a statorand a rotor on the inside of the enclosing casing, in which the interiorparts of the enclosing casing communicates with the interior parts of apump. Surfaces of supported... |
03/14/1995 |
| 5378114 | Gaseous fuel injection pump A gas fuel injection pump including a pump body machined with a pluralityof plunger sliding bores, the pressure head of which has side entryingress passages and individual and separate discharge ports; including ameans to actuate the plungers... |
01/03/1995 |
| 5338151 | Unit for delivering fuel from the fuel tank to the internal combustion engine of a motor vehicle A unit for delivery of fuel from the fuel tank to the internal combustionengine of a motor vehicle includes a feed pump which is arranged in thefuel tank and constructed as a flow pump with substantiallycircular-cylindrical impeller driven in... |
08/16/1994 |
| 5273410 | Compressor exhibiting an iron sulfide wear surface A refrigerant compressor for using HFC 134a as a refrigerant and arefrigerator oil such as polyether type oil, polyester type oil, or thelike which is compatible thereto is disclosed. The refrigerant compressorhas a iron type substrate with a... |
12/28/1993 |
| 5240387 | Variable capacity vane compressor having an improved bearing arrangement for a drive shaft and a capacity control element A variable capacity vane compressor includes a bearing arrangement having aradial bearing radially supporting a drive shaft of the compressor, and athrust bearing rotatably supporting a capacity control element. Thebearing arrangement comprises an... |
08/31/1993 |
| 5192200 | Reed valve for a hermetic compressor A reed valve for a hermetic compressor, comprising a cylinder block (1)having a pair of opposite faces; a cylinder (C) formed in said cylinderblock (1) and housing a piston (2); at least one end plate (3) having anouter face (3a) and an inner face... |
03/09/1993 |