Motors: expansible chamber type – With motive fluid valve – Valved piston
Patent
1984-10-19
1987-12-15
Croyle, Carlton R.
Motors: expansible chamber type
With motive fluid valve
Valved piston
403 31, 403 32, B62D 5530
Patent
active
047124695
ABSTRACT:
A hydraulic tensioning device for tracked vehicles comprising a hydraulically chargeable piston-cylinder unit, coupled on one end with the body of the vehicle, and with the other end to a guide wheel for the track chain which is supported on a rocker arm. In order to obtain the proper track chain tension in any operating condition without providing a separate hydraulic pump, the piston unit is equipped with a tappet supported against the piston unit by means of a spring unit. The tappet closes off a secondary cylinder chamber in the piston unit which is connected with the principal cylinder chamber by two check valves which seal in opposite directions. The tappet effects a pumping action as the result of the vibration generated by the chain links running in and out the guide wheel, thereby pumping the hydraulic oil from a hydraulic oil reservoir into the secondary cylinder chamber and from there into the principal cylinder chamber.
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patent: 4323283 (1982-04-01), Muramoto et al.
Croyle Carlton R.
Koch Robert J.
Krauss-Maffei A.G.
Olds T.
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