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Class Information
Number: 137/512.1
Name: Fluid handling > Line condition change responsive valves > Direct response valves (i.e., check valve type) > Plural > Dividing and recombining in a single flow path
Description: Devices in which the valves are arranged in a single flow path and divide the flow into parallel paths which recombine after passing through the valves.










Sub-classes under this class:

Class Number Class Name Patents
137/512.15 Integral resilient member forms plural valves 242


Patents under this class:
1 2 3 4 5 6

Patent Number Title Of Patent Date Issued
4543980 Valve for pressurized containers Oct. 1, 1985
4535484 Cardiac valvular prosthesis of mechanical type provided with two freely moving leaflets Aug. 20, 1985
4526195 Reinforced plastic structure such as a valve Jul. 2, 1985
4520908 Pressure balanced valve for adjustable hydraulic damper Jun. 4, 1985
4515252 Piston stroke responsive vortex-flow shock absorber May. 7, 1985
4508131 Safety valving for cargo tanks used for bulk transportation of hazardous commodities Apr. 2, 1985
4497749 Check valve for ammonia injector apparatus Feb. 5, 1985
4495964 Unidirectional-flow fluid valve Jan. 29, 1985
4489752 Guard guided multiple element flow configured poppet valve Dec. 25, 1984
4488318 Prosthetic heart valve Dec. 18, 1984
4484597 Homogenizer device, in particular for the production of whipped cream Nov. 27, 1984
4484365 Flap-type prosthetic heart valve Nov. 27, 1984
4483363 Compressor valve Nov. 20, 1984
4478243 Valve assembly Oct. 23, 1984
4474145 Fuel supply system for internal combustion engine Oct. 2, 1984
4467824 Self-closing fire damper for duct Aug. 28, 1984
4457333 Check valve with relief-valve feature Jul. 3, 1984
4451937 Heart valve having ear guided occluders Jun. 5, 1984
4449549 Shutter device for air conduit or the like May. 22, 1984
4445533 Air check valve assembly for powdered bulk product transport May. 1, 1984
4443894 Heart valve with dog-leg pivot Apr. 24, 1984
4416029 Trileaflet prosthetic heart valve Nov. 22, 1983
4406022 Prosthetic valve means for cardiovascular surgery Sep. 27, 1983
4386890 Delivery valve assembly, especially for rotary compressors Jun. 7, 1983
4382901 Mass transfer equipment May. 10, 1983
4373216 Heart valves having edge-guided occluders Feb. 15, 1983
4363142 Prosthetic heart valve Dec. 14, 1982
4357715 Heart valve prosthesis Nov. 9, 1982
RE31040 Heart valve prosthesis Sep. 28, 1982
4351358 Check-valve construction Sep. 28, 1982
4342251 Anti-detonation powder safety device Aug. 3, 1982
4328592 Heart valve prosthesis May. 11, 1982
4321944 Check valve Mar. 30, 1982
4313462 Sequentially operated valve structure Feb. 2, 1982
4308624 Heart valve prosthesis Jan. 5, 1982
4307751 Plate valve Dec. 29, 1981
4278106 Plate check valve Jul. 14, 1981
4276658 Heart valve prosthesis Jul. 7, 1981
4277310 Water-cooled nuclear reactor Jul. 7, 1981
4273155 Back-pressure valve for heating installations Jun. 16, 1981
4272854 Bi-leaflet heart valve Jun. 16, 1981
4265267 Flow control device for use with positive displacement pump May. 5, 1981
4257444 Insert check valve or the like Mar. 24, 1981
4257451 Check valve Mar. 24, 1981
4254508 Bileaflet heart valve with improved pivot Mar. 10, 1981
4253524 High flow check valve apparatus Mar. 3, 1981
RE30532 Flapper valve with independent spring action Mar. 3, 1981
4249567 Check-valve construction Feb. 10, 1981
4248265 Adjustable relief valve Feb. 3, 1981
4230148 Check-valve construction Oct. 28, 1980

1 2 3 4 5 6










 
 
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