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Class Information
Number: 137/85
Name: Fluid handling > Pressure modulating relays or followers > With counter-balancing pressure feedback to the modulating device
Description: Apparatus in which the modulated pressure is utilized in a feedback arrangement to counterbalance the modulating control element.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 4437483 |
Fluid-pressure-operable relay valves |
Mar. 20, 1984 |
| 4423747 |
Pressure regulating valve |
Jan. 3, 1984 |
| 4417599 |
Vacuum signal integrator |
Nov. 29, 1983 |
| 4388942 |
Nozzle flapper valve |
Jun. 21, 1983 |
| 4388943 |
Linkage for moment balancing measuring apparatus |
Jun. 21, 1983 |
| 4375780 |
Fail-fixed electrohydraulic servosystem |
Mar. 8, 1983 |
| 4369804 |
Electrohydraulic translation apparatus, in particular permitting control of a pressure in an automatic transmission |
Jan. 25, 1983 |
| 4368750 |
Ball-type feedback motor for servovalves |
Jan. 18, 1983 |
| 4366670 |
Vacuum control valve for exhaust gas cleaning system |
Jan. 4, 1983 |
| 4362182 |
Nozzle force feedback for pilot stage flapper |
Dec. 7, 1982 |
| 4347699 |
Exhaust cleaning fluid control system and vacuum control valve device for use therein |
Sep. 7, 1982 |
| 4336819 |
Pneumatic converter |
Jun. 29, 1982 |
| 4332269 |
Sloped nozzle pneumatic device |
Jun. 1, 1982 |
| 4331179 |
Regulator/valve controller |
May. 25, 1982 |
| 4329910 |
Transducer assembly providing position output proportional to electrical input signal |
May. 18, 1982 |
| 4327762 |
Control device and method of making the same |
May. 4, 1982 |
| 4325427 |
Dual thermostat control apparatus with dead band response |
Apr. 20, 1982 |
| 4325399 |
Current to pressure converter apparatus |
Apr. 20, 1982 |
| 4318509 |
Fluid temperature control system |
Mar. 9, 1982 |
| 4316479 |
Vacuum modulator valve and subassembly therefor |
Feb. 23, 1982 |
| 4315521 |
Fluid pressure signal controller |
Feb. 16, 1982 |
| 4314578 |
Fluid signal transmitting apparatus |
Feb. 9, 1982 |
| 4310201 |
Adaptive traction pressure regulator |
Jan. 12, 1982 |
| 4290441 |
Control device and method of making the same |
Sep. 22, 1981 |
| 4285358 |
Servovalve feedback wire interface configuration |
Aug. 25, 1981 |
| 4285357 |
Pneumatic relay |
Aug. 25, 1981 |
| 4273150 |
Leverless pressure transducer |
Jun. 16, 1981 |
| 4271859 |
Temperature sensor |
Jun. 9, 1981 |
| 4267855 |
Pneumatic vacuum regulator |
May. 19, 1981 |
| 4263838 |
Pneumatic positioner |
Apr. 28, 1981 |
| 4253604 |
Pneumatic control means for a vehicle heat exchanger system or the like |
Mar. 3, 1981 |
| 4253603 |
Temperature responsive control apparatus |
Mar. 3, 1981 |
| 4231385 |
Pneumatic controller |
Nov. 4, 1980 |
| 4219042 |
Pneumatic relay |
Aug. 26, 1980 |
| 4213478 |
Transducer assembly providing pneumatic output proportional to electrical input signal |
Jul. 22, 1980 |
| 4209030 |
Control device |
Jun. 24, 1980 |
| 4207914 |
Fluid relay apparatus |
Jun. 17, 1980 |
| 4201336 |
Fluidic square root extractor |
May. 6, 1980 |
| 4192453 |
Thermostat construction and method of making the same |
Mar. 11, 1980 |
| 4191091 |
Feathering valve assembly |
Mar. 4, 1980 |
| 4173150 |
Sensor with adjustable pressure responsive detection and control |
Nov. 6, 1979 |
| 4172464 |
Vibration resistant flapper and nozzle |
Oct. 30, 1979 |
| 4169485 |
Method of operating a control system |
Oct. 2, 1979 |
| 4154160 |
Pressure control device for a processing machine with rolls |
May. 15, 1979 |
| 4151856 |
Fluid pressure relay and output booster |
May. 1, 1979 |
| 4126152 |
Pressure reproducing relay |
Nov. 21, 1978 |
| 4112960 |
Variable-gradient spring sub-assembly |
Sep. 12, 1978 |
| 4099539 |
Control system and control device therefor |
Jul. 11, 1978 |
| 4061155 |
Electrohydraulic control system |
Dec. 6, 1977 |
| 4059128 |
Digital pressure standard |
Nov. 22, 1977 |
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