Fluid-pressure and analogous brake systems – Load control – Empty and load type
Reexamination Certificate
2007-01-12
2010-12-28
Siconolfi, Robert A (Department: 3657)
Fluid-pressure and analogous brake systems
Load control
Empty and load type
Reexamination Certificate
active
07857398
ABSTRACT:
The present empty/load device includes an inlet to receive a brake signal, an outlet for a brake device, load sensing element, a change over valve responsive to the load sensing element to proportion the pressure at the inlet and the outlet when empty is sensed by the load sensing element, a differential pressure element connecting the load sensing element and the change over valve, and a lock-out mechanism to prevent proportioning of the inlet pressure to the outlet when activated. The lock-out mechanism includes a lock-out valve, in a lock-out position, pneumatically preventing proportioning of the inlet pressure to the outlet. A first spring biases the lock-out valve from the lock-out position. A detent engages the lock-out valve and holding the lock-out valve in the lock-out position. The lock-out valve may be connected in parallel to the change over valve with respect to the inlet and the outlet. Alternatively, the lock-out valve may be connected in parallel to the both sides of the differential pressure element.
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Kumar Deepak
Spadaccini Michael J.
Bowes Stephen
New York Air Brake Corporation
Siconolfi Robert A
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