Fluid handling – Systems – Multi-way valve unit
Patent
1976-04-01
1977-06-07
Nilson, Robert G.
Fluid handling
Systems
Multi-way valve unit
13762527, 13762543, F16K 1100
Patent
active
040277003
ABSTRACT:
A reversing valve construction having a housing provided with four aligned valve seats and a first movable valve member disposed between the two intermediate valve seats. Second and third movable valve members are respectively disposed outboard of the outboard valve seats. A first pneumatically operated movable part is carried by the housing and is operatively associated with the first and second valve members for sequentially moving the same to close one of the two intermediate valve seats and one of the outboard valve seats when the first part is moved in one direction a certain amount. A second pneumatically operated movable part is carried by the housing and is operatively associated with the first and third valve members for sequentially moving the same to close the other of the two intermediate valve seats and the other of the two outboard valve seats when the second part is moved in a direction opposite to the one direction a certain amount.
REFERENCES:
patent: 2372311 (1945-03-01), Brown
patent: 3608587 (1971-09-01), Zbell
Nilson Robert G.
Robertshaw Controls Company
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