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:
Sep. 16, 1997
Filed:
Dec. 22, 1995
Wolfgang Zirk, Dittelbrunn, DE;
Gerald Bischof, Niederwerrn, DE;
Fichtel & Sachs AG, Schweinfurt, DE;
Abstract
A telescoping front fork of a bicycle which has a spring system which acts between an upper cylindrical housing and a lower cylindrical housing and includes at least one suspension spring, a supplemental spring and a spring in the rebound direction, each of which is made of a compressible elastic foamed, or expanded cellular elastomer. The spring constant of the supplemental spring is lower than that of the suspension spring. This arrangement has the advantage that acceleration peaks are reduced during the transition from a situation in which the two cylindrical houses are at rest and one in which the two cylindrical houses slide in relation to one another. The breakaway force is oriented to the weaker supplemental spring in connection with the rebound direction spring and as the support force increases, the suspension spring is compressed on a delayed basis, without any measurable additional breakaway force.