Tent – canopy – umbrella – or cane – Canes – sticks – crutches – and walking aids – Walker type
Reexamination Certificate
2000-01-06
2001-11-20
Yip, Winnie G. (Department: 3635)
Tent, canopy, umbrella, or cane
Canes, sticks, crutches, and walking aids
Walker type
C135S066000, C135S085000, C280S642000, C280S647000, C280S087021, C280S047270, C280S047350, C482S066000
Reexamination Certificate
active
06318392
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a supportive walker for disable persons, and more particularly, to an improved supportive walker having a safety means to easily control a connection bar connected to the rear frame so as to extend or fold the walker.
2. Description of the Related Art
A conventional supportive walker
90
is illustrated in FIG.
1
and generally includes a front frame
91
and a rear frame
92
which is connected to the front frame
91
by pivots. Both the front frame
91
and the rear frame
92
have wheels
95
connected to lower ends thereof. A limitation plate
93
, such as a link
931
in this embodiment, is connected between the front frame
91
and the rear frame
92
so that the rear frame
92
can be expanded away from the front frame
91
or can be folded close to the front frame
91
. In an expansion status of the supportive walker
90
, a safety buckle
94
is connected between the front frame
91
and the rear frame
92
so as to ensure the fixed position of the front frame
91
and the rear frame
92
. The safety buckle
94
includes a slot
941
defined in the rear frame
92
and a connection plate
942
. The connection plate
942
has one end thereof connected to the link
931
and the other end of the connection plate
942
is engaged with the slot
941
so as to prevent the rear frame
92
from collapsing. Nevertheless, when the supportive walker
90
is moved on a rugged road, the connection plate
942
tends to be disengaged from the slot
941
and this could result in an accident. Furthermore, the location of the connection plate
942
is not convenient for the user to operate, especially for the users who are disable persons.
The present invention intends to provide a safety means of a supportive walker wherein the operation of the safety means is easy and convenient for the disable persons.
SUMMARY OF THE INVENTION
An objective of the present invention is to provide an improved and secure supportive walker that has simple structure and a good feature in maintaining an expansion status of the supportive walker.
Another objective of the present invention is to provide an improved supportive walker which is convenient for the users to fold or expand the walker.
In accordance with one aspect of the present invention, there is provided a supportive walker that can be expanded at a ready-to-be-used status, or can be folded at a storage status. The walker includes a front frame and a rear frame having wheels connected thereto. The front frame has a retaining frame with a passage. The rear frame connects with a connection bar capable of sliding in the passage of the retaining frame. Therefore, the front frame and the rear frame can be expanded and folded with each other. A safety means controls the movement and stops the sliding of the connection bar in the passage of the retaining frame to maintain the walker in a usage status, or allow the walker to be folded.
These and further objects, features and advantages of the present invention will become more obvious from the following description when combined with the accompanying drawings which show, for purposes of illustration only, several embodiments in accordance with the present invention.
REFERENCES:
patent: 2855024 (1958-10-01), Robb
patent: 4341381 (1982-07-01), Norberg
patent: 4641844 (1987-02-01), Mar et al.
patent: 5409028 (1995-04-01), Lee
patent: 5538268 (1996-07-01), Miller
patent: 5716063 (1998-02-01), Doyle et al.
patent: 5816593 (1998-10-01), Che
patent: 5878625 (1999-03-01), Hu
patent: 5887887 (1999-03-01), Keuning
patent: WO 85/05268 (1985-12-01), None
Bacon & Thomas PLLC
Yip Winnie G.
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