The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 13, 1990
Filed:
May. 26, 1988
Naoto Fukushima, Kamakura, JP;
Yukio Fukunaga, Zushi, JP;
Yosuke Akatsu, Yokohama, JP;
Sunao Hano, Yokohama, JP;
Masaharu Sato, Kanagawa, JP;
Nissan Motor Company, Limited, Yokohama, JP;
Abstract
A hydraulic cylinder assembly to be used in an actively controlled suspension system includes a built-in pressure accumulator. The pressure accumulator employed in the hydraulic cylinder assembly has a reciprocally movable free piston for dividing a fluid chamber and a pneumatic chamber. The free piston thrustingly moves for establishing pressure balance between the fluid chamber and the pneumatic chamber and, in turn, for establishing pressure balance between the fluid chamber and an associated pressure chamber in the hydraulic cylinder so as to accumulate pressure while the fluid in the associated pressure chamber is compressed and to supply the pressure when the associated pressure chamber expands while absorbing vibration energy exerted between a vehicle body and a suspension member.