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Class Information
Number: 137/115.03
Name: Fluid handling > Self-proportioning or correlating systems > Self-controlled branched flow systems > Bypass or relief controlled by main line fluid condition > Flow rate responsive
Description: Subject matter wherein the sensor is detecting the variation in the quantity of the fluid flowing in the main flow line in a set period of time and in response thereto the sensor controls the flow in the bypass or relief.

Sub-classes under this class:

Class Number Class Name Patents
137/115.06 Bypass or relief valve biased open 45
137/115.08 Carried choke 12
137/115.09 Choke 47
137/115.12 Flapper 4
137/115.04 Including controlling main line flow 24
137/115.07 Pilot valve operated 32
137/115.11 Venturi 10

Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
4282757 Device for detecting rate of change in pressure Aug. 11, 1981
4282757 Device for detecting rate of change in pressure Aug. 11, 1981
4249558 Bypass valve Feb. 10, 1981
4243059 Method and device for determining the homogeneity of magnetic dispersions Jan. 6, 1981
4226481 Spring-loaded brake device for railway vehicles Oct. 7, 1980
4213741 Variable flow ejector Jul. 22, 1980
4185772 Condition response differential vacuum regulator and method of making the same Jan. 29, 1980
4182354 Method and apparatus for flow diversion in a high pressure fluid delivery system Jan. 8, 1980
4159025 Back flow preventer valve Jun. 26, 1979
4121610 Electrically operated proportional flow control hydraulic valve and manually operable remote control device therefor Oct. 24, 1978
4117857 Fuel control system for a prime mover Oct. 3, 1978
4000607 Fluid control valve and method Jan. 4, 1977
3978879 Control means for hydrostatic steering systems and the like Sep. 7, 1976
3945205 Secondary air control device Mar. 23, 1976

1 2

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