Metal working – Means to assemble or disassemble – Puller or pusher means – contained force multiplying operator
Patent
1979-04-30
1980-12-30
Crane, Daniel C.
Metal working
Means to assemble or disassemble
Puller or pusher means, contained force multiplying operator
B23P 1500
Patent
active
042414865
ABSTRACT:
A reversing valve construction having a housing provided with a chamber carrying a movable piston-like valve member therein that controls ports of a valve seat of the housing through the relative position of a passage of the valve member relative to the ports. A one-piece flexible sealing skirt is carried by the valve member and extends outwardly therefrom in a cantilevered manner adjacent the valve seat means so as to be 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 means in a manner to tend to sealingly conform to the contour of the valve seat means and thereby seal the passage means of the valve member to the valve seat means while permitting sliding movement therebetween.
REFERENCES:
patent: 3032312 (1962-05-01), Greenawalt
patent: 3056574 (1962-10-01), Greenawalt
patent: 3357453 (1967-12-01), Mingrone et al.
patent: 3532321 (1970-10-01), Bowman et al.
patent: 3610285 (1971-10-01), Passaggio
patent: 3773082 (1973-11-01), Davis
patent: 3985154 (1976-10-01), Hargraves
patent: 4022426 (1977-05-01), Read
Crane Daniel C.
Robertshaw Controls Company
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