Fluid handling – Diverse fluid containing pressure systems – Main line flow displaces additive from shunt reservoir
Patent
1978-05-16
1980-04-22
Cohan, Alan
Fluid handling
Diverse fluid containing pressure systems
Main line flow displaces additive from shunt reservoir
119 1402, 119 1425, A01J 500
Patent
active
041989996
ABSTRACT:
A milking apparatus is disclosed for automatically providing the appropriate amount of vacuum for purposes of milking a cow throughout the entire milking operation. The milking apparatus includes a fluid control valve system having a controller unit and a discharge valve in fluid communication with a collection jar. The controller unit is further adapted for communication with a source of vacuum, and the collection jar is adapted to be in communication with the cow such that the vacuum can draw milk from the cow into the collection jar. The discharge valve is further adapted for communication with a source of vacuum for drawing the milk through the discharge valve. Further the fluid control valve system includes a first pilot vacuum signal conduit for providing communication between the controller unit and the discharge valve, the discharge valve selectively providing communication between the collection jar and the source of vacuum for selectively discharging milk from the collection jar through the discharge valve upon pilot vacuum signal from the controller unit. The discharge valve includes a vacuum sensing means for sensing when the collection jar is fully discharged, the vacuum sensing means being in communication with the controller unit through a second pilot signal conduit for signaling the controller unit when the collection jar is fully discharged, the control unit then selectively closing the discharge valve. An aspect of the invention includes the controller unit having a plurality of individual plates.
REFERENCES:
patent: 2987065 (1961-06-01), Bender
patent: 3469596 (1969-09-01), Branton
patent: 3788338 (1974-01-01), Burns
patent: 3971400 (1976-07-01), Thompson
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