Abstract The suspension strut of the monotube-type for use with a powered and wheeled vehicle is of the combined hydraulic and pneumatic type having a cylinder and a piston slidable therein and the interior space of said cylinder is filled with a hydraulic liquid such as oil. The piston is fitted with flow-restricting valve means for generating damping forces during telescopic relative movement of said piston to said cylinder and said piston is mechanically connected with the chassis or running gear of said vehicle which said cylinder is fixed to the other portion of the vehicle. The improvement comprises a sleeve formed between said rod and said piston and a free piston is slidably mounted within the interior space of said sleeve for dividing said space into two variable volume chambers and a certain volume of a highpressure inert gaseous medium is confined within one of said two chambers in a totally enclosed manner by rigid encircling walls for assuring the least possible leakage of the confined gaseous medium from said gas chamber.
Inventors
👤 Teiji Katsumori
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-10-31 12:33
CPC Classifications
F; F16; F16F; F16F9/00; F16F9/06; F16F9/063
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
187 words
In a suspension strut of the telescopic type for use with a vehicle having a chassis and a running gear, said strut being of the combined hydraulic and pneumatic type having a cylinder and a piston slidable therein, the interior space of said cylinder being filled with a hydraulic liquid such as oil and said piston being fitted with flow-restricting valve means for generation of damping forces during telescopic movement of said piston relative to said cylinder, said piston being mechanically connected through a connecting rod with a selected one of said chassis and running gear and said cylinder being fixed to the remaining one of said chassis and running gear, the improvement comprises a sleeve formed between said rod and said piston, a free piston slidably mounted within the interior space of said sleeve for dividing said space into two variable volume chambers and a certain volume of a high pressure inert gaseous medium is confined within one of said two chambers in a totally enclosed manner by rigid encircling walls for assuring the least possible leakage of the confined gaseous medium from said gas chamber.
Claim 2
Dependent Claim
187 words
In a suspension strut of the telescopic type for use with a vehicle having a chassis and a running gear, said strut being of the combined hydraulic and pneumatic type having a cylinder and a piston slidable therein, the interior space of said cylinder being filled with a hydraulic liquid such as oil and said piston being fitted with flow-restricting valve means for generation of damping forces during telescopic movement of said piston relative to said cylinder, said piston being mechanically connected through a connecting rod with a selected one of said chassis and running gear and said cylinder being fixed to the remaining one of said chassis and running gear, the improvement comprises a sleeve formed between said rod and said piston, a free piston slidably mounted within the interior space of said sleeve for dividing said space into two variable volume chambers and a certain volume of a high pressure inert gaseous medium is confined within one of said two chambers in a totally enclosed manner by rigid encircling walls for assuring the least possible leakage of the confined gaseous medium from said gas chamber.
Claim 3
Dependent Claim
79 words
The suspension strut as claimed in claim 1, further comprising a mounting flange fixedly mounted on the outer periphery of said cylinder; a mounting cap fixedly attached to the upper end of a dust-proof cover, said mounting cap and said dust-proof cover being attached to said piston rod, a compression spring abutting by its both ends against said mounting flange and said mounting cap for urging said cylinder and said piston rod to move in relatively opposite axial directions.
Claim 4
Dependent Claim
26 words
The suspension strut as claimed in claim 1, further comprising an axle spindle attached to the lower part of said cylinder for supporting a vehicle wheel.
Claim 5
Dependent Claim
58 words
The suspension strut as claimed in claim 1, wherein said flow-restricting valve means communicate the variable volume chamber within the interior space of said sleeve on the side of said free piston opposite the chamber containing said high pressure inert gaseous medium with the interior space of said cylinder on the side of said piston opposite said sleeve.