Expansible chamber devices – Knockdown or flow conduit storage or retrieval means
Reexamination Certificate
2001-12-13
2003-09-09
Look, Edward K. (Department: 3745)
Expansible chamber devices
Knockdown or flow conduit storage or retrieval means
Reexamination Certificate
active
06615704
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a tire pump handle, and more particularly to a tire pump handle that may be operated between a locking position and a non-locking position by a user's one hand only.
2. Description of the Related Art
A tire pump for a bicycle often includes a handle and a retractable device mounted on the handle so that the tire pump may be retracted to be mounted on the frame of the bicycle.
A conventional retractable tire pump handle
1
in accordance with the prior art shown in
FIGS. 10-12
comprises a fixing member
101
, a cylinder
104
, two symmetric semi-circular casings
105
, a positioning member
108
, a spring
200
, and an adjusting member
201
.
The fixing member
101
is secured to a piston
100
of the tire pump. The fixing member
101
has a square hole
102
and has an outer wall formed with two opposite stop blocks
103
. The two symmetric semi-circular casings
105
are-received in the cylinder
104
. Each of the two symmetric semi-circular casings
105
is formed with an L-shaped guide slot
106
having a stop zone
1061
, and has a first end having an inner edge provided with a positioning block
107
and a second end mounted on the fixing member
101
so that the stop block
103
may slide in the guide slot
106
. The positioning member
108
is formed with a square hole
109
and has a periphery formed with multiple depressions
110
. The positioning member
108
is secured in the first end of each of the two symmetric semi-circular casings
105
, and the depressions
110
are combined with the positioning blocks
107
. The spring
200
is mounted between the fixing member
101
and the positioning member
108
. The adjusting member
201
is provided with a square post
202
that may extend through the cylinder
104
, the square hole
109
of the positioning member
108
and the square hole
102
of the fixing member
101
.
As shown in
FIG. 11
, the user's one hand may hold the cylinder
104
and his other hand may hold and rotate the adjusting member
201
, whereby the square post
202
may rotate the fixing member
101
which drives the stop block
103
to move into the stop zone
1061
, so that the fixing member
101
is secured in the casings
105
, and cannot be retracted into the casings
105
.
As shown in
FIG. 12
, the user's one hand may hold the cylinder
104
and his other hand may hold and rotate the adjusting member
201
, whereby the square post
202
may rotate the fixing member
101
which drives the stop block
103
to detach from the stop zone
1061
and to slide in the guide slot
106
, so that the fixing member
101
is released from the casings
105
, and may be retracted into the casings
105
. Thus, the tire pump handle
1
is retractable relative to the piston
100
, so that the tire pump may be retracted to be mounted on the frame of the bicycle.
However, the conventional retractable tire pump handle
1
in accordance with the prior art has the following disadvantages.
The square post
202
of the adjusting member
201
is rubbed with the square hole
109
of the positioning member
108
and the square hole
102
of the fixing member
101
, thereby producing friction therebetween, so that the square post
202
of the adjusting member
201
is easily worn out during long-term utilization, thereby affecting operation of the conventional retractable tire pump handle
1
.
The user's one hand has to hold the cylinder
104
and his other hand has to hold and rotate the adjusting member
201
, so that the conventional retractable tire pump handle
1
cannot be operated by the user's one hand only, thereby causing inconvenience in use.
SUMMARY OF THE INVENTION
The present invention has arisen to mitigate and/or obviate the disadvantage of the conventional tire pump handle.
The primary objective of the present invention is to provide a tire pump handle that may be operated between a locking position and a non-locking position by one hand only, wherein the operation knob of the switch member may be driven and moved by the user's one hand only, so that the handle of the tire pump may be operated between a locking position and a non-locking position by the user's one hand only, thereby greatly facilitating the user operating the handle of the tire pump, and thereby greatly enhancing the versatility of the tire pump.
Another objective of the present invention is to provide a tire pump handle that may be operated between a locking position and a non-locking position by one hand only, wherein the tire pump has a simple construction, and the parts of the tire pump may be manufactured easily, thereby facilitating fabrication of the tire pump, and thereby saving cost of fabrication.
In accordance with the present invention, there is provided a tire pump, comprising:
a reciprocal member having a first end and a second end; and
a handle mounted on the reciprocal member and having a first end and a second end, the first end of the handle mounted on the second end of the reciprocal member, the handle including a switch member mounted on the first end thereof, wherein the switch member may be operated by a user's one hand only so that the switch member may be moved between a first position where the second end of the reciprocal member is fixed on the first end of the handle, and a second position where the second end of the reciprocal member may be retracted into the first end of the handle.
Further benefits and advantages of the present invention will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings.
REFERENCES:
patent: 4569275 (1986-02-01), Brunet
patent: 5443370 (1995-08-01), Wang
patent: 6506026 (2003-01-01), Wu
Kamrath Alan D.
Kershteyn Igor
Look Edward K.
Rider Bennett LLP.
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