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:
Jun. 29, 1976
Filed:
Jul. 30, 1975
Ludwig Stadelmann, Altdorf, DT;
Fritz Bauer, Altdorf, DT;
Suspa Federungstechnik Fritz Bauer & Sohne oHG, Altdorf, near Nurnberg, DT;
Abstract
A lengthwise-adjustable, compressed-gas-filled gas spring, particularly for continuous height adjustment of chairs, seats, tables, or the like, has two cylinders, coaxially mounted one inside the other, and leaving an annular chamber therebetween. A piston and piston rod are displaceably provided within the inner cylinder, the piston sealingly dividing the cylinder into a first housing chamber, on the piston rod side, and a second housing chamber. The piston rod extends sealingly out of the cylinders. The first housing chamber has a fluid connection to the annular chamber at all times. The inner cylinder has a passageway therethrough near the end opposite the piston rod end, and is axially displaceable within the center cylinder between a first position at which the passageway is sealed off and a second position at which a fluid connection is allowed between the second housing chamber and the annular chamber.