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:
Aug. 20, 1991
Filed:
Jan. 03, 1990
Stefan Volpel, Koblenz, DE;
Wolfgang Zankl, Vallendar, DE;
Stabilus GmbH, Koblenz-Neuendorf, DE;
Abstract
According to an illustrative example of the invention, a gas spring comprises a cylinder, a piston rod extending through one end of the cylinder and a piston connected with the piston rod within the cylinder. A pressurized gas is contained within the cylinder. A container surrounds the cylinder. An annular space is defined between the cylinder and the container. The cylinder is subdivided by the piston rod into two working chambers. The annular space is subdivided by a separating ring into two axially adjacent sections. Radial bores through the cylinder extend between the working chambers and the two sections of the annular space. Each of the two sections of the annular space defines together with allocated radial bores flow paths adapted to interconnect the working chambers across the piston, such that in respective axially adjacent movement ranges of the piston, the working chambers are interconnected with each other, and in an intermediate standstill range between said axially adjacent movement ranges, the flow connection between the two working chambers is interrupted.