Brake control valve with AAV stability

Details Brake control valve with AAV stability Brake control valve with AAV stability

2011-07-19

2011-07-19

King, Bradley T (Department: 3657)

Fluid-pressure and analogous brake systems

Releasing

Motor

C303S003000, C303S009000, C303S015000, C303S082000

Reexamination Certificate

active

07980637

ABSTRACT:
A vent valve made from a standard emergency brake valve portion. It includes an emergency portion body with an interface to be mated with the emergency portion interface of the pipe bracket. The body includes a casting with at least one cover and the casting including all the cast cavities and passages for an emergency portion. A vent valve selectively connects a first brake pipe port to a vent port on the body, A vent piston controls the vent valve and a discharge valve pneumatically controls the vent piston. An emergency piston is responsive to brake pipe pressure for controlling the discharge valve. The body does not include at least one of an inshot valve and an accelerated application valve.

REFERENCES:
patent: 2812985 (1957-11-01), Thomas et al.
patent: 4043605 (1977-08-01), Hart
patent: 4586756 (1986-05-01), Hintner
patent: 4592598 (1986-06-01), Hintner
patent: 5503467 (1996-04-01), Gaughan
patent: 5676431 (1997-10-01), McLaughlin et al.
patent: 6186600 (2001-02-01), Scott et al.
patent: 6318812 (2001-11-01), Newton et al.
patent: 6472769 (2002-10-01), Long, Jr. et al.
patent: 6971725 (2005-12-01), Holder

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