Metal working – Means to assemble or disassemble – Puller or pusher means – contained force multiplying operator
Patent
1979-12-06
1981-10-06
Crane, Daniel C.
Metal working
Means to assemble or disassemble
Puller or pusher means, contained force multiplying operator
B23P 1500
Patent
active
042927200
ABSTRACT:
A reversing valve construction having a housing provided with a chamber carrying a movable valve member therein that controls ports of a valve seat of the housing through the relative position of a cavity of the valve member relative to the ports, a one-piece flexible sealing skirt being carried by the valve member and extending outwardly therefrom in a cantilevered manner adjacent the valve seat so as adapted to be exposed to fluid pressure in the chamber that will act directly thereon and cause the flexible skirt to flex and engage the valve seat in a manner to tend to sealingly conform to the contour of the valve seat and thereby seal the cavity to the valve seat while permitting sliding movement therebetween. A spring in the housing acts on the flexible skirt to urge the same toward the valve seat.
REFERENCES:
patent: 3032312 (1962-05-01), Greenawalt
patent: 3056574 (1962-10-01), Greenawalt
patent: 3349800 (1967-10-01), Herion et al.
patent: 3357453 (1967-12-01), Mingrone et al.
patent: 3369790 (1968-02-01), McHale et al.
patent: 3985154 (1976-10-01), Hargraves
patent: 3990676 (1976-11-01), Brownstein
Crane Daniel C.
Robertshaw Controls Company
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