Land vehicles – Wheeled – Occupant propelled type
Reexamination Certificate
2001-10-01
2003-01-07
Lerner, Avraham (Department: 3618)
Land vehicles
Wheeled
Occupant propelled type
C280S237000, C280S246000
Reexamination Certificate
active
06502843
ABSTRACT:
BACKGROUND OF THE PRESENT INVENTION
1. Field of Invention
The present invention relates to a twist vehicle, and more particularly to a twist vehicle incorporated with an anti-reverse system wherein the driving wheels of the twist vehicle are restricted to rotate in one direction only, so that any unintentional backward movement of the twist vehicle is prevented.
2. Description of Related Arts
Referring to
FIGS. 1-2
of the drawings, a conventional twist vehicle comprises a vehicle frame
10
, a connecting member
21
connected to front portion of the vehicle frame
10
, a steering unit
20
rigidly connected to the a end portion of the connecting member
21
, a twisting unit
22
rigidly connected to the another end portion of the connecting member
21
and pivotally connected to the vehicle frame
10
about a pivot
30
, and a pair of rear wheels
11
,
12
rotatably connected to two sides of rear portion of the vehicle frame
20
respectively. The twisting unit
22
comprises a twisting frame
2
and a pair of driving wheels
221
,
222
rotatably connected to the rear portion of the twisting frame
2
in such a manner that the pair of wheels
221
,
222
is spacdley apart from each other and spacedly apart from the pivot
30
. When clockwise and anti-clockwise movements are subsequently imparted to the steering unit
20
, the connecting member
21
transfers the motions to the twisting unit
22
, causing the twisting unit
22
to rotate accordingly about the pivot
30
. Amid a series of clockwise and anti-clockwise movements applied to the steering unit
20
, the twist vehicle is driven to move forwardly.
Such kind of twist vehicle requires a flat ground with even coefficient of friction in order for it to function properly. However, in reality, a ground seldom has constant coefficient of friction. If the friction between the pair of driving wheels and the ground is inadequate, the efficiency of the twist vehicle will become smaller, i.e. the movement of the twist vehicle is less than that of the movement as if the friction between the pair of driving wheels and the ground is adequate. In this case, very often, the pair of driving wheels
221
,
222
moves in reverse direction due to inertia of the vehicle frame and the rider of the twist vehicle. Even worse, if the rider keeps on twisting the steering unit vigorously, the twist vehicle may flip over due to too rapid changes of center of gravity.
SUMMARY OF THE PRESENT INVENTION
A main object of the present invention is to provide a twist vehicle which comprises a vehicle frame, a steering unit, a twisting unit and a connecting member in which when subsequent clockwise and anti-clockwise movements are imparted to the steering unit, the movements are then transferred to the twisting unit, causing the twisting unit to rotate accordingly, and therefore drive the twist vehicle to move forwardly.
Another object of the present invention is to provide a twist vehicle which comprises an anti-reverse system for restricting the pair of driving wheels of the twist vehicle from moving backwardly with respect to vehicle frame.
Another object of the present invention is to provide a twist vehicle which comprises an anti-reverse system which comprises at least two locking member provided to the pair of driving wheels respectively, and a pair of locking panels in which each locking panel has at least one biasing member for rotatably engaging with the locking member, so as to restrict the pair of driving wheels to be rotated in one direction only.
To enable a further understanding of the objectives and the underlying technological methods, the brief description of the drawings below is followed by a detailed description of the preferred embodiment.
REFERENCES:
patent: 3663038 (1972-05-01), Hendricks
patent: 3863950 (1975-02-01), Jordan
patent: 4076269 (1978-02-01), Muguruma
patent: 4200304 (1980-04-01), Hwang
patent: 4930796 (1990-06-01), Harrod
patent: 6386304 (2002-05-01), Wang
patent: 2002/0084616 (2002-07-01), Gu
patent: 52-2634 (1977-10-01), None
Chan Raymond Y.
David & Raymond Patent Group
Gu Hong Jiun
Lerner Avraham
LandOfFree
Anti-reverse system for twist vehicle does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Anti-reverse system for twist vehicle, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Anti-reverse system for twist vehicle will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3056327