Bicycle frame

Details Bicycle frame Bicycle frame

2005-01-25

2005-01-25

Morris, Lesley D. (Department: 3611)

Land vehicles

Wheeled

Occupant propelled type

C280S275000, C280S285000

Reexamination Certificate

active

06845998

ABSTRACT:
The invention concerns a bicycle frame (10) comprising a main frame (12), consisting of a seat pipe (24), a down tube (20) and a top tube (18) as well as a rear structure (14) with a pair of chain cross bars (46) and a pair of saddle cross bars (56) which are connected with their rear ends (50, 58) to an end run (54) each for the installation of a rear wheel axis, whereby the chain cross bars (46) are linked with their front ends (18) to a first fixed frame linkage point (40) of a main frame (12) and a see-saw equipped with three see-saw linkage points (60, 66, 68), which are a first see-saw linkage point (60) which is connected with the front ends (60) of the seat cross bars (56), a second see-saw linkage point (66) that is linked pivotally to a second fixed frame linkage point (42) of the main frame (12) and a third see-saw linkage point (68) that is pivotally connected with a first end (70) of a spring cushioning element (72). In order to achieve a delayed response of the suspension and to at least limit the undesired see-sawing of the rear structure, it is planned that the spring cushioning element (72is connected with its second end (74) of the chain cross bar bracket (78) extending from the rear end (48) of the chain cross bars (46).

REFERENCES:
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patent: 5857473 (1999-01-01), Vanover et al.
patent: 5921572 (1999-07-01), Bard et al.
patent: 6036213 (2000-03-01), Busby
patent: 6102421 (2000-08-01), Lawwill et al.
patent: 6131934 (2000-10-01), Sinclair
patent: 6161858 (2000-12-01), Tseng
patent: 6164676 (2000-12-01), Wilcox
patent: 6170845 (2001-01-01), Tseng
patent: 6244610 (2001-06-01), Kramer-Massow
patent: 6293574 (2001-09-01), Storck
patent: 6439593 (2002-08-01), Tseng
patent: 6450520 (2002-09-01), Girard
patent: 6595538 (2003-07-01), Ellsworth et al.

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