Animal husbandry – Milkers – Combined
Patent
1982-10-18
1985-02-12
Chamblee, Hugh R.
Animal husbandry
Milkers
Combined
A01J 700
Patent
active
044984197
ABSTRACT:
A backwash valve for connection between teat cup assembly and milk manifold is illustrated. The valve includes a milk inlet, a central valve chamber and a milk outlet. The milk inlet communicates to the teat cup assembly. The milk outlet communicates to the milk receiving manifold, which manifold is typically under a vacuum. A valve head reciprocates through the central chamber into and out of sealing contact with the milk outlet. The valve head and valve seat reciprocate out of the central valve chamber to an isolation chamber during backwash. Any leak between valve head and valve seal sees the vacuum. By reciprocation of the valve seat to the isolation chamber, vacuum communicated to the milk outlet does not expose contaminates present in the backwash solution to leakage through the seal. Backwash fluid is introduced through a chamber communicated to the valve head and passes out into the central valve chamber. Thereafter the backwash fluid flows out the milk inlet and teat cup assembly along a reverse flow path. When cleaning is completed, the valve head reciprocates upwardly and the attached teat cup assembly discharges milk through the milk inlet, central valve chamber and milk outlet. A cleaning disposition is disclosed wherein the isolation chamber is placed in a flow path with cleansing fluid following the path. During this cleaning disposition, substantially all operatively portions of the valve are cleansed and purged by the cleaning solution after milking has terminated.
REFERENCES:
patent: 4222346 (1980-09-01), Reisgies
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