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:
Oct. 06, 1992
Filed:
Jul. 19, 1991
Hans Jurgen Bauer, Altdorf, DE;
Suspa Compart Aktiengesellschaft, Altdorf, DE;
Abstract
A method for the production of an internal slide surface on a guide sleeve of plastic material for a length-adjustable chair column consists in that the internal surface of the guide sleeve is provided with surfaces, which are undersize in proportion to a to-be-guided housing of a gas spring. Recesses are located between the individual surfaces and are oversize in proportion to the housing of the gas spring to be guided. Partial cylinder surfaces are broached in the surfaces between the recesses by broaching and in common they represent a slide surface. These measures ensure impeccable broaching with high surface quality and dimensional precision of the slide surface. Moreover, the remaining recesses, which may have the form of grooves of arbitrary cross-section, can be used as storage chambers for a lubricant.