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Class Information
Number: 137/103
Name: Fluid handling > Self-proportioning or correlating systems > Supply and exhaust type > Vacuum or suction pulsator type (e.g., milking machine)
Description: Systems in which an outlet or receiver is alternately connected to a source of suction or vacuum and a source of fluid under pressure or vent (usually the atmosphere).










Sub-classes under this class:

Class Number Class Name Patents
137/105 With pulsation responsive pilot valve 2
137/104 With trip linkage or snap action 1


Patents under this class:

Patent Number Title Of Patent Date Issued
7975647 Flow restrictor for milking apparatus Jul. 12, 2011
6161580 Pulsator Dec. 19, 2000
5395350 Paracentesis valve Mar. 7, 1995
5265639 Magneto-pneumatic timing device Nov. 30, 1993
5265638 Magneto-pneumatic intermittent suction device Nov. 30, 1993
5167200 Pulsator for milking machines Dec. 1, 1992
4909187 Pulsator for milking machines Mar. 20, 1990
4782849 Control unit for intermittent suction system Nov. 8, 1988
4643132 Pulsator for milking machines Feb. 17, 1987
4558843 Air inlet valve for admitting air to the milk drain conduit of a teat cup or collector piece Dec. 17, 1985
4538634 Vacuum pulsator valves Sep. 3, 1985
4513766 Vacuum pulsator valves Apr. 30, 1985
4508134 Controlling EGR in an internal combustion engine and fluid pressure signal controller therefor Apr. 2, 1985
4499916 Vacuum check valve Feb. 19, 1985
4480657 Vacuum line control valves Nov. 6, 1984
4456016 Inhalation valve Jun. 26, 1984
4413644 Automatic vacuum bleed valve for use on paper making machines Nov. 8, 1983
4376454 Valve Mar. 15, 1983
4366831 Vacuum closed venting valve Jan. 4, 1983
4365608 Controlling engine exhaust gas recirculation and vacuum inverter Dec. 28, 1982
4241751 Vacuum transmitting valve Dec. 30, 1980
4230141 Pulsator valves Oct. 28, 1980
4191090 Vacuum toggle Mar. 4, 1980
4166476 Vacuum cut-off valve Sep. 4, 1979
4161947 Divers exhaust valve Jul. 24, 1979
4033125 Air flow control means for automobile engine exhaust gas cleaning means Jul. 5, 1977
4023588 Control device for milking machines May. 17, 1977
3982555 Vacuum relay valve Sep. 28, 1976
3982553 Vacuum reducer valve assembly Sep. 28, 1976
3967849 Vacuum control system Jul. 6, 1976
3930515 Pneumatic control system and valve construction therefor or the like Jan. 6, 1976











 
 
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