Head set assembly for bicycles

Details Head set assembly for bicycles Head set assembly for bicycles

2001-12-28

2003-11-25

Luong, Vinh T. (Department: 3682)

Machine element or mechanism

Control lever and linkage systems

Elements

C403S371000, C280S279000, C384S540000, C384S517000

Reexamination Certificate

active

06651525

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to a head set for bicycles and the head set includes an annular flange of a pressing ring located between the steerer tube and the bearing set to reduce the impact or wear therebetween.
BACKGROUND OF THE INVENTION
A conventional head set assembly for bicycles is shown in FIG.
1
and generally includes two bearing sets
20
respectively connected to two ends of the head tube
25
and a steerer tube
24
extends through the two bearing sets
20
via the head tube
25
. A handlebar assembly (not shown) is connected to the steerer tube
24
so that when turning the handlebar assembly, the steerer tube
24
turns. A race of the bearing set
20
has an inclined surface
21
and a pressing ring
22
is engaged with the inclined surface
21
. A dust cap
23
is mounted to the pressing
22
so as to exert a downward force to position the bearing set
20
. The steerer tube
24
directly contacts the inner surface
26
of the race of the bearing set
20
. There are wear and impact happened between the race and the steerer tube
24
so that it requires a precise installment between the bearing set
20
and the steerer tube
24
. Any small gap between the bearing set
20
and the steerer tube
24
will accelerate the wear therebetween and cause the bearing set
20
to be worn out or even broken.
SUMMARY OF THE INVENTION
In accordance with one aspect of the present invention, there is provided a head set assembly for bicycles and the head set assembly comprises a bearing set connected to the head tube of the bicycle and comprises balls received between an upper race and a lower race. The upper race has an annular inclined surface and an annular vertical inside. A pressing ring has an inclined outer surface and a flange extending from the inclined outer surface. The inclined outer surface of the pressing ring is engaged with the annular inclined surface of the upper race and the flange of the pressing ring is matched with the annular vertical inside of the upper race. The flange is mounted to a steerer tube extending through the head tube. A dust cap is connected onto a top of the pressing ring and a skirt of the dust cap encloses the lower race of the bearing set.
The primary object of the present invention is to provide a head set assembly wherein a flange of a pressing is located between the bearing set and the steerer tube so as to reduce the impact and wear therebetween.
The present invention will become more obvious from the following description when taken in connection with the accompanying drawings which show, for purposes of illustration only, a preferred embodiment in accordance with the present invention.


REFERENCES:
patent: 4189167 (1980-02-01), Dubois
patent: 4445703 (1984-05-01), Tange
patent: 4531756 (1985-07-01), Mori
patent: 5246296 (1993-09-01), Chi
patent: 5330220 (1994-07-01), Nagano
patent: 5893574 (1999-04-01), Campagnolo
patent: 5918895 (1999-07-01), Chi
patent: 5964474 (1999-10-01), Chen
patent: 6332735 (2001-12-01), Wang
patent: 2328913 (1999-10-01), None
patent: 8-290793 (1996-11-01), None

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