Fluid-pressure and analogous brake systems – Speed-controlled – Having a valve system responsive to a wheel lock signal
Reexamination Certificate
2007-02-27
2011-10-18
Schwartz, Christopher (Department: 3657)
Fluid-pressure and analogous brake systems
Speed-controlled
Having a valve system responsive to a wheel lock signal
C137S556000, C137S596180
Reexamination Certificate
active
08038231
ABSTRACT:
Pivotally mounted doors forming the floor of a railroad car are prevented from opening inadvertently through not allowing fluid pressure to be applied to a door opening piston until the fluid pressure exceeds a predetermined amount. A control valve can control the position of a spool.
REFERENCES:
patent: 1711211 (1929-04-01), Schmohl et al.
patent: 4072126 (1978-02-01), Kemp
patent: 4726393 (1988-02-01), Herner
patent: 4729408 (1988-03-01), Coutant
patent: 5072748 (1991-12-01), Gripe et al.
patent: 6766828 (2004-07-01), Takada et al.
patent: 6789856 (2004-09-01), Bottiglieri
patent: 7093544 (2006-08-01), Allen et al.
patent: 7328661 (2008-02-01), Allen et al.
patent: 2005/0199292 (2005-09-01), Stedman et al.
Lexair, Inc.
Nagle, Jr. David W.
Schwartz Christopher
Stites & Harbison PLLC
LandOfFree
Control valve does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Control valve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Control valve will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4253575