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:
Mar. 30, 1993
Filed:
Dec. 14, 1990
Bernard J Wallis, Dearborn, MI (US);
Other;
Abstract
A self contained gas spring which is interchangeable with a coil spring that is constructed such that it is not adversely affected by the deleterious effects of oil and other contaminants. The gas spring comprises a one-piece cylindrical upper body having a base wall and a peripheral wall and a rod extending upwardly into the cylindrical body such that the upper body completely encircles and encloses the upper end of the rod. The rod has a base and the outer diameter of the peripheral wall of the cylinder and the outer diameter of the base have substantially the same diameter such that the cylinder can be positioned in a recess of a press or die in place of a coil spring. The cylindrical body and rod include interengaging portions limiting axially outwardly movement of the cylinder relative to the rod. The cylinder further includes a charging valve in the base of the rod through which gas may be introduced for charging the space between the cylinder and the rod and a pressure relief rupture disk in the base wall of the cylindrical body.