Electropneumatic pilot adapter
First Claim
1. An electropneumatic retrofit unit for a pneumatic brake control valve having a pipe bracket and at least a service brake portion interconnected at brake pipe ports, brake cylinder ports, auxiliary reservoir ports, emergency reservoir ports and exhaust ports, the retrofit unit comprising:
- a brake pipe passage connecting brake pipe ports which mate with said control valve brake pipe ports;
a brake cylinder passage connecting brake cylinder ports which mate with said control valve brake cylinder ports;
an auxiliary reservoir passage connecting auxiliary reservoir ports which mate with said control valve auxiliary reservoir ports;
an emergency reservoir passage connecting emergency reservoir ports which mate with said control valve emergency reservoir ports;
an exhaust passage connecting exhaust ports which mate with said control valve exhaust ports;
a first electrically controlled valve selectively connecting said brake pipe passage to a venting port for applying a brake; and
a second electrically controlled valve selectively interconnecting said brake pipe passage and said emergency reservoir passage for releasing said brake.
1 Assignment
0 Petitions
Accused Products
Abstract
An adaptor or retrofit unit which is placeable between a pipe bracket and the service portion of a brake control valve which includes brake pipe passage, brake cylinder passage, auxiliary reservoir passage, emergency reservoir passage and an exhaust retainer passage which interconnects the corresponding ports of the pipe bracket and the service brake portion and electrically controlled valves. A first electrically controlled valve selectively controls the connection of the brake pipe passage to a venting port for applying the brakes. A second electrically controlled valve interconnects the brake pipe passage and the emergency reservoir passage for release of the brakes. A third electrically controlled valve selectively connects the auxiliary reservoir to a vent port for releasing a stuck brake. A fourth electrically controlled valve selectively controls the exhaust passage connected to the retainer for gradually releasing the brake.
35 Citations
24 Claims
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1. An electropneumatic retrofit unit for a pneumatic brake control valve having a pipe bracket and at least a service brake portion interconnected at brake pipe ports, brake cylinder ports, auxiliary reservoir ports, emergency reservoir ports and exhaust ports, the retrofit unit comprising:
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a brake pipe passage connecting brake pipe ports which mate with said control valve brake pipe ports; a brake cylinder passage connecting brake cylinder ports which mate with said control valve brake cylinder ports; an auxiliary reservoir passage connecting auxiliary reservoir ports which mate with said control valve auxiliary reservoir ports; an emergency reservoir passage connecting emergency reservoir ports which mate with said control valve emergency reservoir ports; an exhaust passage connecting exhaust ports which mate with said control valve exhaust ports; a first electrically controlled valve selectively connecting said brake pipe passage to a venting port for applying a brake; and a second electrically controlled valve selectively interconnecting said brake pipe passage and said emergency reservoir passage for releasing said brake. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An electropneumatic brake control valve having a pneumatic service brake portion and a pneumatic emergency brake portion connected to a pipe bracket, the pipe bracket comprising:
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a brake pipe passage connecting a brake pipe port to said service and emergency portions; a brake cylinder passage connecting a brake cylinder port to said service and emergency portions; an auxiliary reservoir passage connecting an auxiliary reservoir port to said service portion; an emergency reservoir passage connecting an emergency reservoir port to said service and emergency portions; a retainer passage connecting an exhaust port to said service portion; a first electrically controlled valve selectively connecting said brake pipe passage to a venting port for applying a brake; a second electrically controlled valve selectively interconnecting said brake pipe passage and said emergency reservoir passage for releasing said brake; transducers for sensing pressure in said brake pipe passage and said auxiliary reservoir passage; and electronics connected to said transducers and operating said second valve to interconnect said brake pipe passage and said emergency reservoir passage when the brake pipe passage pressure is greater than the auxiliary passage pressure and operating said first valve. - View Dependent Claims (13, 14, 15, 16)
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17. An electropneumatic brake control valve having a pneumatic service brake portion and a pneumatic emergency brake portion connected to a pipe bracket, the pipe bracket comprising:
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a brake pipe passage connecting a brake pipe port to said service and emergency portions; a brake cylinder passage connecting a brake cylinder port to said service and emergency portions; an auxiliary reservoir passage connecting an auxiliary reservoir port to said service portion; an emergency reservoir passage connecting an emergency reservoir port to said service and emergency portions; a retainer passage connecting an exhaust port to said service portion; a first electrically controlled valve selectively connecting said brake pipe passage to a venting port for applying a brake; a second electrically controlled valve selectively interconnecting said brake pipe passage and said emergency reservoir passage for releasing said brake; and a third electrically controlled valve selectively connecting said auxiliary reservoir passage to a vent port for releasing said brake. - View Dependent Claims (18, 19)
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20. An electropneumatic brake control valve having a pneumatic service brake portion and a pneumatic emergency brake portion connected to a pipe bracket, the pipe bracket comprising:
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a brake pipe passage connecting a brake pipe port to said service and emergency portions; a brake cylinder passage connecting a brake cylinder port to said service and emergency portions; an auxiliary reservoir passage connecting an auxiliary reservoir port to said service portion; an emergency reservoir passage connecting an emergency reservoir port to said service and emergency portions; a retainer passage connecting an exhaust port to said service portion; a first electrically controlled valve selectively connecting said brake pipe passage to a venting port for applying a brake; a second electrically controlled valve selectively interconnecting said brake pipe passage and said emergency reservoir passage for releasing said brake; and a third electrically controlled valve selectively controlling said retainer passage for gradually releasing said brake. - View Dependent Claims (21, 22, 23, 24)
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Specification