Safety wheel of a baby's wheeled chair

Details Safety wheel of a baby's wheeled chair Safety wheel of a baby's wheeled chair

2000-09-07

2001-12-25

Graham, Matthew C. (Department: 3613)

Brakes

To retard rolling of caster

C188S082840

Reexamination Certificate

active

06332513

ABSTRACT:

BACKGROUND OF THE INVENTION
The present invention relates to a safety wheel of a baby's wheeled chair for a baby to sit on and move around to learn to walk.
Referring to
FIGS. 8 and 9
, a conventional safety wheel of a baby's wheeled chair has a wheel part
6
, a ball
4
, and a confining block
7
; the wheel part
6
has a recess
61
; the confining block
7
is connected to the wheel part
6
with an arc trench
62
being formed between the block
7
and the wheel part
6
. The ball
4
is confined in the arc trench
62
; the arc trench
62
has an intermediate lower portion wider than the tell
4
, and tapers towards two upper end portions, which are narrower than the ball
4
.
In moving the baby's wheeled chair slowly, the ball
4
will roll in the lower portion of the arc trench
62
, permitting the wheeled chair to continue moving.
When the baby's wheeled chair is moved very quickly, the ball
4
will move to, and engage, the upper portions of the arc trench
62
due to centrifugal force, stopping the wheeled chair from moving.
The ball
4
and the arc trench
62
can stop the wheeled chair when the chair moves too fast, and therefore protect the baby riding on the chair. However, it is found that the safety wheel has an disadvantage that the wheeled chair can't be stopped to protect the baby from hitting obstacles accidentally when it is moved backwards.
SUMMARY OF THE INVENTION
Therefore, it is a main object of the present invention to provide a safety wheel for a baby's wheeled chair which can stop the wheeled chair from moving backwards.
The safety wheel of a baby's wheeled chair of the present invention has:
A support member connected to a bottom side of the wheeled chair;
A right wheel part turnably connected to the support member;
A left wheel part connected to the right wheel part; the left wheel has an elongated confining trench;
A ball movably received in the elongated confining trench;
A side cover connected to the support member; the side cover has a round recess and a stopping part in the round recess; the round recess faces the left wheel part; the ball is confined in the elongated trench and the round recess; the ball can move to a lower end portion of the confining trench due to gravity for same to be stopped by the stopping part of the side cover when the wheel rolls in a first direction, and not to be stopped by the stopping part when the wheel rolls in an opposite direction.


REFERENCES:
patent: 1459394 (1923-06-01), Gent
patent: 2824625 (1958-02-01), Rice, Jr.
patent: 6070701 (2000-06-01), Hu
patent: 6076839 (2000-06-01), Pao-Hung

Affiliated with

Also associated with

Rating

Safety wheel of a baby's wheeled chair does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Safety wheel of a baby's wheeled chair, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Safety wheel of a baby's wheeled chair will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2566133