Fluid handling – Systems – Sequential distributor or collector type
Patent
1990-10-25
1991-08-13
Rosenthal, Arnold
Fluid handling
Systems
Sequential distributor or collector type
137869, 137607, 13762533, F16K 11048
Patent
active
050388274
ABSTRACT:
A shuttle valve (10) for use in a dual refrigerator system (100) and operated by controlled refrigerant pressure lines (120, 122) to provide that either one or both of two evaporators (104, 106) are active. The valve (10) includes piston chambers (30) at each end having an outer portion (26) communicating with pressure lines (120, 122) and an enlarged inner portion (32) and an intermediate chamber (21) having valve seats (22) at each end. The valve (10) includes inlet and outlet ports (14, 16) communicating with the piston chamber enlarged portions (32) and an outlet part (18) communicating with the intermediate chamber (21). The valve (10) also includes a piston assembly (40) having opposed pistons (41, 42) interconnected by a biased push rod (44) and mounted in associated piston chambers for closing associated inlet ports (104, 106). Each piston includes an inner portion (48) having a first seal (54) engageable with a valve seat (22) and movable within the piston chamber enlarged portion (32) and an outer portion (46) having a second seal (58) received within the piston chamber inner portion (26).
REFERENCES:
patent: 3480041 (1969-11-01), Whitlock
patent: 3867960 (1975-02-01), Hosoda et al.
patent: 4754693 (1988-07-01), Teltscher
Heffner Joseph H.
Hoehne Dennis L.
Hind Ronald W.
Rosenthal Arnold
Sporlan Valve Company
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