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公开(公告)号：US3637052A
公开(公告)日：1972-01-25
申请号：US3637052D
申请日：1970-08-20
发明人： BICK DAVID EWART
CPC分类号： B61K7/025
摘要： A wagon retarder for installation on a railway track has a telescopic cylinder and piston device containing hydraulic fluid and compressed gas, said device being contracted by an approaching wheel and then being extended by the compressed gas as the wheel moves away. The cylinder slides in a fixed guide cylinder, and it slides on the piston which has a piston rod of smaller diameter extending through a sealing device into engagement with the base of the guide cylinder. The piston carries a flow-sensitive valve which is closable during contraction of the device whereby hydraulic fluid flows from one side of the piston to the other side through a pressure relief valve. The relief valve generates a pressure which acts on the cylinder to exert a retarding force against the wagon wheel. During extension of the device, the flow-sensitive valve opens to enable hydraulic fluid to flow in the reverse direction across the piston.
摘要翻译： 用于安装在铁路轨道上的货车减速器具有包含液压流体和压缩气体的伸缩筒和活塞装置，所述装置由接近的轮收缩，然后随着车轮离开而被压缩气体延伸。 气缸在固定的导向气缸中滑动，并且在活塞上滑动，该活塞具有较小直径的活塞杆，其延伸穿过密封装置与导向气缸的基部接合。
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公开(公告)号：US3570635A
公开(公告)日：1971-03-16
申请号：US3570635D
申请日：1968-06-19
申请人： TAKAGI TATSUYA
发明人： TAKAGI TATSUYA
摘要： An oil-type vibration damper includes a piston and a cylinder, and one or two sets of pressure control valves. One set of pressure control valves effects damping of vehicle vibrations above the supporting springs, and the other set of pressure control valves effects damping of vehicle vibrations below the supporting springs or one pressure control valve effects damping of said both vehicle vibrations. A switch valve mechanism detects changes in the frequency of the vibrations to automatically act on one or the two sets of pressure control valves in accordance with the frequency of the vibrations.
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