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Class Information
Number: 417/437
Name: Pumps > Expansible chamber type
Description: Apparatus comprising a chamber having a wall portion or pumping member movable to effect a change in volume of said chamber and means to control the flow of pump fluid into or out of said chamber.










Sub-classes under this class:

Class Number Class Name Patents
417/472 Bellows-type chamber 116
417/471 Biasing means effects eduction stroke of abutment driven, pressure producing pumping member 47
417/470 Biasing means effects induction stroke of abutment driven, vacuum producing pumping member 126
417/489 Control by withdrawal or tilting of pump piston relative to cylinder 42
417/485 Delivery to different ports on successive strokes 5
417/479 Distributor formed from integral portion of flexible wall pumping member 154
417/507 Distributor moved by separate fluid responsive surface 55
417/506 Distributor movement adjustable 19
417/509 Distributor part forms traversed movable pump chamber wall portion 9
417/505 Electrically or magnetically actuated distributor 138
417/474 Elongated flexible chamber wall progressively deformed 296
417/558 First distributor includes passage controlled by second distributor (i.e., inlet and outlet) 7
417/555.1 Fluid serially moved to opposite side of pumping member 112
417/439 Having additional chamber intake connection from nonpumping space 42
417/446 Having means for holding pressure responsive distributor open 38
417/540 Having pulsation dampening fluid receiving space 272
417/559 Having pumping chamber pressure responsive distributor 97
417/440 Having separate noncyclic valve (e.g., bypass, etc.) 373
417/455 Having valve parts relatively moved for nonvalving function 7
417/454 Including valve assembly, disassembly, or inspection facilitating means 203
417/478 Inlet and discharge distributors at opposite ends of tubular flexible wall pumping chamber 176
417/438 Liquid coolant introduced into gas pump chamber or inlet 16
417/510 Mechanically actuated distributor 73
417/460 Moving cylinder 47
417/503 Multiple cyclic inlet paths 55
417/502 Multiple cyclic outlet paths 29
417/481 Oscillating pumping member 30
417/504 Plural outlet paths to single discharge line acting under different conditions 10
417/521 Plural pumping chambers 141
417/486 Plural pumping members in single pump chamber 23
417/447 Pressure responsive distributor continuously biased open 7
417/443 Pressure responsive distributor opened responsive to pumping member position 33
417/557 Pump chamber in constant communication with inlet or discharge conduit 34
417/448 Pump mounted in vertical tubular flow conduit removable as unit by driving rod manipulation 20
417/490 Pumping member position controlled port 120
417/456 Relatively movable serial distributors 19
417/442 Selectively usable plural inlet or outlet distributors for single chamber 64
417/451 Valve element mounted in fixed chamber wall removable with pumping member 5
417/480 Valve in collapsible wall pumping member 63
417/545 Valved piston 132


Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8679230 Reducing emissions of VOCs from low-pressure storage tanks Mar. 25, 2014
8672652 High-pressure fuel supply pump and the manufacturing method Mar. 18, 2014
8601874 Method for detection of a malfunction related to a fluid affected component in a piston machine Dec. 10, 2013
8585380 Systems and methods for ex-vivo organ care Nov. 19, 2013
8579611 Load ring mounting of pumping plunger sleeve Nov. 12, 2013
8540499 Extra-capillary fluid cycling system and method for a cell culture device Sep. 24, 2013
8540495 Dual duty hand pump Sep. 24, 2013
8510015 Reciprocating compressor simulator and a computer system using the same Aug. 13, 2013
8465268 Compression clamp for a modular fluid end for a multiplex plunger pump Jun. 18, 2013
8398385 Refrigerant compressor Mar. 19, 2013
8348641 Piston compressor Jan. 8, 2013
8348642 Active mud valve system Jan. 8, 2013
8348638 Compressor Jan. 8, 2013
8333568 Device and methods of measuring pressure Dec. 18, 2012
8328541 Displacement conversion mechanism and actuator Dec. 11, 2012
8272855 Valve and infusion device having the same Sep. 25, 2012
8257666 Integrated active flux microfluidic devices and methods Sep. 4, 2012
8246330 Integrated catalyst Aug. 21, 2012
8235689 Piston pump with rotating pump actuator Aug. 7, 2012
8231367 Compressor having a simplified structure with a reduced size Jul. 31, 2012
8162631 Floating pinion bearing for a reciprocating pump Apr. 24, 2012
8133042 Chemical liquid supplying apparatus and pump assembly Mar. 13, 2012
8129176 Integrated active flux microfluidic devices and methods Mar. 6, 2012
8075286 Compressor for liquid or gaseous fluids Dec. 13, 2011
8070855 Methods and apparatuses for reducing emissions of volatile organic compounds from pumps and storage tanks for VOC-containing fluids Dec. 6, 2011
7990705 Systems and methods for synthetic jet enhanced natural cooling Aug. 2, 2011
7918317 Lubricating oil dosing arrangement Apr. 5, 2011
7870964 Implementation of microfluidic components in a microfluidic system Jan. 18, 2011
7607898 Method and apparatus for delivering pressurized gas Oct. 27, 2009
7527483 Expansible chamber pneumatic system May. 5, 2009
7445926 Fluid control structures in microfluidic devices Nov. 4, 2008
7404703 Air pump with apparatus to hold nozzle Jul. 29, 2008
7354255 Piston vibratory pump Apr. 8, 2008
7322800 System and method of providing hydraulic pressure for mechanical work from an engine lubricating system Jan. 29, 2008
7261525 Outlet check valve for fluid bladders Aug. 28, 2007
7238165 Fluid pump Jul. 3, 2007
7188377 Hand-operable pump Mar. 13, 2007
7059841 Structure of an oil-free compressor on a vehicle Jun. 13, 2006
7040875 Refrigerant pump with rotors in bearing May. 9, 2006
7013793 Diaphragm mounting method for a diaphragm pump Mar. 21, 2006
6948920 Toilet bowl and tank drainage device Sep. 27, 2005
6776591 Membrane pump comprising an inlet opening that is controlled by the membrane Aug. 17, 2004
6651742 Method and apparatus for enhancing oil recovery Nov. 25, 2003
6611425 Electronic apparatus Aug. 26, 2003
6592343 Air compression device Jul. 15, 2003
6497560 High volume low pressure air pump Dec. 24, 2002
6464475 Head for pumps in particular of the membrane or piston type and method for its manufacture Oct. 15, 2002
6257848 Compressor having a control valve in a suction passage thereof Jul. 10, 2001
6231319 Hermetic compressor May. 15, 2001
6171081 Fuel pump assembly Jan. 9, 2001

1 2 3










 
 
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