发明名称 |
DUAL SEAL BRAKE CONTROL VALVE |
摘要 |
<p>A brake control valve includes a housing, a quick braking chamber and a piston subject to brake pipe pressure on one side of the piston. A bore in the housing connects the quick braking chamber at a first end and the one side of the piston at a second end. A first valve is in the housing at the first end of the bore. A first operator is in the bore for opening the first valve for a range of positions of the piston. The bore has a first portion of a first diameter and a second portion of a second diameter larger than the first diameter. The first bore portion connects the one side of the piston to the second bore portion. A first operator in the bore is connected to the piston. A seal on the first operator is dimensioned to form a seal with the first bore portion and not with the second bore portion. The seal is located on the operator to lie in the first bore portion for a first segment of the range of piston positions and to lie in the second bore portion for a second segment of the range of piston positions.</p> |
申请公布号 |
CA2639576(C) |
申请公布日期 |
2015.03.31 |
申请号 |
CA20082639576 |
申请日期 |
2008.09.18 |
申请人 |
NEW YORK AIR BRAKE CORPORATION |
发明人 |
THOMAS, MARC S.;KUMAR, DEEPAK |
分类号 |
F16K11/00;B60T13/24;B60T15/18;B61H13/00;F16K1/44 |
主分类号 |
F16K11/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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