Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Browse by Category: Main > Engineering
Class Information
Number: 137/464
Name: Fluid handling > Line condition change responsive valves > Safety cut-off requiring reset > Fluid counter-biased or unseated valve
Description: Apparatus in which the valve is urged or biased, as by gravity or a spring means, toward a closed or cut-off position and this bias is opposed by the fluid pressure within the apparatus, a lowering in the fluid pressure permitting the valve to seat or close, the arrangement being such that the valve does not return to open position on subsequent increase of fluid pressure.










Sub-classes under this class:

Class Number Class Name Patents
137/466 With fluid pressure seating of valve 13
137/465 With mechanical stop against reopening 7


Patents under this class:

Patent Number Title Of Patent Date Issued
8307847 Ejector valve with glands Nov. 13, 2012
7216668 Interruption valve with automatic reset May. 15, 2007
7090144 Water fountain attachment for a faucet Aug. 15, 2006
6789566 Safety contrivance for gas-using device Sep. 14, 2004
5860446 Method and apparatus for safely controlling fluid flow Jan. 19, 1999
5289843 Hydraulic safety valve Mar. 1, 1994
5238020 Hydraulic valve Aug. 24, 1993
4469124 Gas shut-off valve Sep. 4, 1984
4461315 Pressure protection system Jul. 24, 1984
4446890 Continuity actuated isolation valve assembly May. 8, 1984
4413643 Hose-break valve Nov. 8, 1983
4352366 Velocity operated standing valve Oct. 5, 1982
4343327 Pressure responsive, manually opening valve Aug. 10, 1982
4173233 Pilot valve Nov. 6, 1979
4151863 Deflation device May. 1, 1979
4085772 Valve assembly Apr. 25, 1978
4080987 Hydraulic safety valve Mar. 28, 1978
3971404 Hydraulic runaway control valve Jul. 27, 1976











 
 
  Recently Added Patents
Compounds for the reduction of .beta.-amyloid production
Acoustic measuring instrument
Female urine funnel
Method of fabricating display device
Method and system for physical verification using network segment current
Cable sheath
Hierarchical binding and lookup of addresses in inter-process communications systems
  Randomly Featured Patents
Conveyor system with diverter
Tobacco-smoke filters
Image display system
Misuse preventative, controlled release formulation
Enzymatic resolution of aryl and thio-substituted acids
Method of erecting a tower structure
Circuit and/or method for automated use of unallocated resources for a trace buffer application
Methods of using low molecular weight heparins treatment of pathological processes
Centrifuge with sensors for detecting centrifuge conditions
Expansion dowel