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Hydraulic suspension device for automobile

  • US 5,351,790 A
  • Filed: 06/19/1992
  • Issued: 10/04/1994
  • Est. Priority Date: 06/20/1991
  • Status: Expired due to Term
First Claim
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1. A hydraulic suspension device for an automobile for vehicle level control, said device receiving pressurized fluid from and releasing pressurized fluid into a hydraulic control circuit, including a hydraulic oil pump and an oil tank, and comprising:

  • a hydraulic cylinder assembly having a hollow pressure tube, a piston which is slidably received in said hollow pressure tube so as to form a pressure fluid chamber within said hollow pressure tube, and a piston rod secured at one end to said piston and extending so that its other end is disposed outside of said hollow pressure tube;

    fluid passage means, incorporated in one of said piston rod and said hollow pressure tube, for communicating said pressure fluid chamber with said hydraulic control circuit; and

    valve means for regulating a position of the automobile to provide said vehicle level control by controlling pressurized fluid introduced into said pressure fluid chamber through said fluid passage means, said valve means being (a) disposed between (1) the hydraulic cylinder assembly and (2) the hydraulic oil pump and the oil tank so as to selectively communicate the hydraulic cylinder assembly with the hydraulic oil pump and the oil tank to introduce said pressurized fluid into and release said pressurized fluid from said hydraulic cylinder assembly and (b) directly and integrally attached to said one of said piston rod and said hollow pressure tube outside of said hollow pressure tube.

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