Land vehicles – Wheeled – Occupant propelled type
Patent
1995-12-22
1997-09-16
Johnson, Victor E.
Land vehicles
Wheeled
Occupant propelled type
280279, 267141, B62K 2508
Patent
active
056672349
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.
REFERENCES:
patent: 5284352 (1994-02-01), Chen
patent: 5367918 (1994-11-01), Chang et al.
patent: 5445401 (1995-08-01), Bradbury
patent: 5449189 (1995-09-01), Chen
patent: 5470090 (1995-11-01), Stewart et al.
Bischof Gerald
Zirk Wolfgang
Fichtel & Sachs AG
Johnson Victor E.
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