Brakes – Vehicle – Velocipede
Reexamination Certificate
2000-08-08
2001-10-09
Oberleitner, Robert J. (Department: 3613)
Brakes
Vehicle
Velocipede
C188S024190, C188S024220, C188S00200R
Reexamination Certificate
active
06298951
ABSTRACT:
BACKGROUND AND SUMMARY OF THE INVENTION
The present invention relates to a vehicle front brake, and more specifically to a swivel adjustment member for a vehicle front brake for adjusting the pitch between the brake arms of the vehicle front brake, which is durable and practical in use.
FIGS. from
1
through
3
show a vehicle front brake according to the prior art. This structure of vehicle front brake comprises a swivel adjustment member
4
turned about a shaft relative to a cable guide
43
between two positions to adjust the pitch between the brake shoes
441
and
451
at two brake arms
44
and
45
. The swivel adjustment member
4
comprises two parallel sidewalls
41
, a connecting wall
42
connected wall
42
. The sidewalls
41
each have a short side
411
and long side
412
connected at right angles and alternatively forced into engagement with positioning grooves
431
of the cable guide
43
. This structure of swivel adjustment member
4
is not satisfactory in function, and has numerous drawbacks as outlined hereinafter.
1. Because the connecting wall
42
is a narrow wall transversely connected between the sidewalls
41
remote front the short side
411
of each sidewall
41
, the sidewalls
41
tend to be forced outwards and deformed, causing a positioning failure in the positioning grooves
431
of the cable guide
43
.
2. Because the short side
411
defines with the longitudinal central line of the respective sidewall
41
a 90 ° contained angle, the sidewalls
41
tend to be forced away from the positioning grooves
431
of the cable guide
43
by an external force.
3. Because the handle
421
extends from the connecting wall
42
in direction reversed to the long side
412
of each sidewall
41
, the handle
421
may hinder the operation of the brake arms
44
and
45
when the short side
411
of each sidewall is respectively engaged into the positioning groove
431
of the cable guide
43
.
4. Because the short side
411
defines with the longitudinal central line of the respective sidewall
41
a 90 ° contained angle, it takes much effort to shift the swivel adjustment member
4
between the two positions.
The present invention has been accomplished to provide a swivel adjustment member for a vehicle front brake, which eliminates the aforesaid drawbacks. According to one aspect of the present invention, the swivel adjustment member comprises two parallel sidewalls, a connecting back wall connected between the sidewalls, and a handle extended from the back connecting wall, wherein the connecting back wall of the swivel adjustment member has a top side connected between the short top side of each sidewall to reinforce the structural strength of the swivel adjustment member, and to prevent the sidewalls from being stretched outwards or deformed when forced into engagement with the positioning grooves of the cable guide. According to another aspect of the present invention, the sidewalls each have a short top side and a long front side alternatively forced into engagement with the positioning grooves of the cable guide, and the handle is extended upwardly backwards from the top side of the connecting back wall adjacent to the short top side of each sidewall. After positioning of the swivel adjustment member in either of the two positions, the handle does not hinder the operation of the brake arms. According to another aspect of the present invention, the short top side of each sidewall of the swivel adjustment member has a straight engagement portion obliquely backwardly sloping toward the connecting back wall and the handle, and a parabolic guide portion connected between the straight engagement portion and one end of the long front side of the corresponding sidewall. The parabolic guide portion enables the sidewalls to be smoothly shifted between the two positions. According to still another aspect of the present invention, the contained angle defined between the straight engagement portion and the longitudinal central line of the corresponding sidewall is smaller than 90 °, so that the short top side of each sidewall can be positively respectively positioned in the positioning grooves of the cable guide. According to still another aspect of the present invention, the handle has a fixed and connected to the topside of the connecting back and one end of the straight engagement portion of the short topside of each sidewall. After the short topside of each sidewall of the swivel adjustment member has been respectively forced into engagement with the positioning grooves of the cable guide, the handle is stopped at the periphery of the cable guide to hold the swivel adjustment member in place.
REFERENCES:
patent: 3628635 (1971-12-01), Yoshigai
patent: 4591026 (1986-05-01), Nagano
patent: 4718521 (1988-01-01), Hosokawa
patent: 2145484 (1985-03-01), None
Kramer Devon
Oberleitner Robert J.
Varndell & Varndell PLLC
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