Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Browse by Category: Main > Engineering
Class Information
Number: 137/531
Name: Fluid handling > Line condition change responsive valves > Direct response valves (i.e., check valve type) > Reciprocating valves > Varying effective lever arm
Description: Valves in which the bias is applied through a lever the effective length of which varies as the valve opens or closes.










Patents under this class:

Patent Number Title Of Patent Date Issued
8479764 Safety valve Jul. 9, 2013
6391019 Valve apparatus and valve system using thereof May. 21, 2002
6227239 Spring-loaded safety valve May. 8, 2001
5205311 Compound lever controlled spill valve Apr. 27, 1993
5046525 Differential loading fluid check valve Sep. 10, 1991
4687022 Pressure relief valve and regulator Aug. 18, 1987
4384576 Ventilator apparatus May. 24, 1983
4201242 Pressure relief valve May. 6, 1980











 
 
  Recently Added Patents
Apparatus and methods for providing efficient space-time structures for preambles, pilots and data for multi-input, multi-output communications systems
Serving base station selection based on backhaul capability
Arrangements and method relating to communication bearers
Systems and methods for performing live chat functionality via a mobile device
Transparent zebrafish and preparation method thereof
Rotating sunlight/light beam for fractional/beneficial use
Method and system for monitoring service quality in a mobile node
  Randomly Featured Patents
Encapsulated sensor device
Minimizing the volume or maximizing the production rate of slurry bubble reactors by using large gas flow rates and moderate single pass conversion
Convertible electrical device cover and method for installing same
Fault localization and health indication for a controller area network
Method and system for establishing a teleconference over a telephony network
DMA controller that passes destination pointers from transmit logic through a loopback buffer to receive logic to write data to memory
Cigarette pack merchandising unit
Apparatus and method for the reproduction of colored originals with gray balance and/or contrast adjustment
Support for non-local returns in parallel thread SIMD engine
Sewing tube for a xenograft mitral valve