Metal working – Means to assemble or disassemble – Puller or pusher means – contained force multiplying operator
Patent
1974-05-16
1976-02-03
Hall, Carl E.
Metal working
Means to assemble or disassemble
Puller or pusher means, contained force multiplying operator
29436, 29454, 267168, B23P 1500, F16K 3112
Patent
active
039356264
ABSTRACT:
A plural range pressure regulator construction having a housing provided with an inlet and an outlet separated by a valve seat that is controlled by a valve member that is interconnected to a flexible wall carried by the housing. Biasing means are carried by the housing for acting on one side of the wall to tend to move the wall in one direction relative to the housing, the biasing means comprising a plurality of separate spring means each acting on the wall to provide one pressure range for the pressure regulator construction. The housing has a storage space for storing one of the spring means so that the same will not act on the wall whereby the remaining spring means acting on the wall will provide another pressure range for the pressure regulator construction.
REFERENCES:
patent: 2478040 (1949-08-01), Campbell, Jr. et al.
patent: 2653793 (1953-09-01), St. Clair
patent: 2760507 (1956-08-01), Miller
patent: 2887123 (1959-05-01), Becker
patent: 3056424 (1962-10-01), Courtot et al.
patent: 3448764 (1969-06-01), Dykzeul et al.
patent: 3747629 (1972-06-01), Bauman
Crane Dan C.
Hall Carl E.
Robertshaw Controls Company
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