Expansible chamber type > Patents

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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	97
417/471	Biasing means effects eduction stroke of abutment driven, pressure producing pumping member	37
417/470	Biasing means effects induction stroke of abutment driven, vacuum producing pumping member	99
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	140
417/507	Distributor moved by separate fluid responsive surface	49
417/506	Distributor movement adjustable	17
417/509	Distributor part forms traversed movable pump chamber wall portion	9
417/505	Electrically or magnetically actuated distributor	118
417/474	Elongated flexible chamber wall progressively deformed	238
417/558	First distributor includes passage controlled by second distributor (i.e., inlet and outlet)	4
417/555.1	Fluid serially moved to opposite side of pumping member	92
417/439	Having additional chamber intake connection from nonpumping space	39
417/446	Having means for holding pressure responsive distributor open	29
417/540	Having pulsation dampening fluid receiving space	229
417/559	Having pumping chamber pressure responsive distributor	79
417/440	Having separate noncyclic valve (e.g., bypass, etc.)	328
417/455	Having valve parts relatively moved for nonvalving function	4
417/454	Including valve assembly, disassembly, or inspection facilitating means	171
417/478	Inlet and discharge distributors at opposite ends of tubular flexible wall pumping chamber	163
417/438	Liquid coolant introduced into gas pump chamber or inlet	7
417/510	Mechanically actuated distributor	65
417/460	Moving cylinder	40
417/503	Multiple cyclic inlet paths	53
417/502	Multiple cyclic outlet paths	28
417/481	Oscillating pumping member	29
417/504	Plural outlet paths to single discharge line acting under different conditions	8
417/521	Plural pumping chambers	104
417/486	Plural pumping members in single pump chamber	20
417/447	Pressure responsive distributor continuously biased open	7
417/443	Pressure responsive distributor opened responsive to pumping member position	29
417/557	Pump chamber in constant communication with inlet or discharge conduit	32
417/448	Pump mounted in vertical tubular flow conduit removable as unit by driving rod manipulation	17
417/490	Pumping member position controlled port	111
417/456	Relatively movable serial distributors	15
417/442	Selectively usable plural inlet or outlet distributors for single chamber	60
417/451	Valve element mounted in fixed chamber wall removable with pumping member	4
417/480	Valve in collapsible wall pumping member	49
417/545	Valved piston	99

Patents under this class:

1 2 3

Patent Number	Title Of Patent	Date Issued
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
6146114	Fluid pump and expandable energy storage device	Nov. 14, 2000
5957673	Injection pump for diesel engines	Sep. 28, 1999
5947706	Hand operated floor pump with retractable stand	Sep. 7, 1999
5823754	Manual pump	Oct. 20, 1998
5806575	Vacuum extractor of a vacuum container	Sep. 15, 1998
5787854	Device with fuel injection and lubricant delivery means for internal combustion engines	Aug. 4, 1998
5681435	Fluid dispensing pump	Oct. 28, 1997
5662098	Injector-type atomizer	Sep. 2, 1997
5655890	Toy pump device	Aug. 12, 1997
5645056	Variable volumetric inflatable pump	Jul. 8, 1997
5624242	Hand air pump for different types of valves	Apr. 29, 1997
5620314	Hand-operated liquid pump with removable parts	Apr. 15, 1997
5600856	Toilet blockage remover	Feb. 11, 1997
5551848	Attachment mechanism for portable hand pump	Sep. 3, 1996
5540557	Vacuum pump for containers	Jul. 30, 1996
5535900	Bottle cap with an air removing device	Jul. 16, 1996
5518376	Combined housing and air pump	May. 21, 1996
5494411	Portable hand air pump having collapsible handle and footstand	Feb. 27, 1996
5494419	Portable and flexible air pump for bicycle	Feb. 27, 1996
5492535	Hand-powered pumping apparatus for perfusion and other fluid catheterization procedures	Feb. 20, 1996
5480287	Pumping device, particularly for sports shoes, and method for manufacture thereof	Jan. 2, 1996
5472325	Suction pump for draining body fluids from body cavities	Dec. 5, 1995
5465857	Vacuum cap for liquor bottles	Nov. 14, 1995
5435230	Inflation mechanism	Jul. 25, 1995
5403170	Compressor section in an easily assembled motor-compressor unit	Apr. 4, 1995
5403166	Drain flushing device with top mounted funnel shaped liquid inlet cavity	Apr. 4, 1995
5335853	Compact long-lasting sprayer, pump and agitator combination	Aug. 9, 1994
5336065	Manually operated refrigerant recovery device	Aug. 9, 1994