Spring actuated brake cylinder with release piston lockout means

Details Spring actuated brake cylinder with release piston lockout means Spring actuated brake cylinder with release piston lockout means

1975-12-17

1977-03-29

Blix, Trygve M.

Fluid-pressure and analogous brake systems

Multiple systems

Fluid pressure and electric

92 63, 188170, 303 71, 303 89, B60T 1322

Patent

active

040145794

ABSTRACT:
A brake cylinder device including a conventional release piston spring-biased toward a full-application or emergency application position and operable responsively to fluid pressure applied thereto in opposing relation to the spring force acting thereon, to a brake release position, a conventional service application piston, both pistons being subjectable concurrently to fluid pressure for operating the release piston to its release position and the service piston to a service brake application position in accordance with the degree of fluid pressure acting thereon, and a locking mechanism for automatically locking the release piston in its release position upon attainment of a full service application and thereafter during service braking operation at less than full service level and while the vehicle is in motion, and being operable for unlocking the release piston upon stopping of the vehicle and withdrawal of service braking fluid pressure.

REFERENCES:
patent: 3003473 (1961-10-01), Ottoson
patent: 3037819 (1962-06-01), Sukala
patent: 3182566 (1965-05-01), Berg et al.
patent: 3482666 (1969-12-01), Case et al.
patent: 3572472 (1971-03-01), Black
patent: 3874747 (1975-04-01), Case et al.

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