Pneumatic emergency brake application valve and an associated el

Details Pneumatic emergency brake application valve and an associated el Pneumatic emergency brake application valve and an associated el

1996-11-12

1998-11-03

Friedhofer, Michael A.

Electricity: circuit makers and breakers

Special application

Actuated concurrently with operation or use of art device

303 50, H01H 304

Patent

active

058312323

ABSTRACT:
A manually operable pneumatic emergency brake valve and electric switch including a valve body having an inlet port and an outlet port, an internal valve assembly normally seated by the biasing force of a helical spring, a pair of pivotal levers for operating a movable valve stem to unseat said internal valve assembly, and said movable stem including a cam surface for actuating the electric switch to signify an emergency brake application.

REFERENCES:
patent: 2258783 (1941-10-01), McNeal
patent: 2276028 (1942-03-01), Dick
patent: 2484940 (1949-10-01), Franzheim
patent: 3461425 (1969-08-01), Schultz et al.
patent: 3576529 (1971-04-01), Garrison
patent: 4286826 (1981-09-01), Leiber
patent: 4305623 (1981-12-01), Seabase
patent: 4318091 (1982-03-01), Fulmer
patent: 4653813 (1987-03-01), Burgdorf
patent: 4953444 (1990-09-01), Cunningham et al.

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