Structure for fastening a support shaft to a seat of a chair

Details Structure for fastening a support shaft to a seat of a chair Structure for fastening a support shaft to a seat of a chair

2000-07-27

2001-05-15

Cranmer, Laurie K. (Department: 3636)

Chairs and seats

Chair hardware or attachment

C297S326000, C297S344210

Reexamination Certificate

active

06231126

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates generally to a chair, and more particularly to a structure for fastening a seat to a support shaft of the chair.
2. Description of Related Art
As shown in
FIGS. 1-5
, a prior art chair has a seat
11
, which is supported by a support shaft
19
of a base
18
of the chair. The seat
11
is provided in the underside with a fastening seat
12
fastened thereto. The fastening seat
12
is provided with a swing seat
20
which is pivoted to the fastening seat
12
by a pivot
14
and is provided with a resilient member
15
. The resilient member
15
is linked with the fastening seat
12
. The fastening seat
12
is provided with two ribs
13
which are provided with an arcuate through hole
16
for receiving a wrenching rod
17
. The swing seat
20
is provided with a locating hole
21
and a locating plate
22
which is fastened to the swing seat
20
by welding and is provided with a fitting hole
23
for receiving the support shaft
19
in conjunction with the locating hole
21
. The locating plate
22
and the swing seat
20
are separately made by punching and pressing and are therefore not cost-effective.
BRIEF SUMMARY OF THE INVENTION
The primary objective of the present invention is to provide a cost-effective structure for fastening a seat to a support shaft of the chair.
In keeping with the principle of the present invention, the foregoing objective of the present invention is attained by the structure comprising a fastening plate secured to the underside of the seat, and a fastening seat which is pivoted to the fastening plate and is provided with a tapered protrusion made integrally with the fastening seat.
The features, functions, and advantages of the present invention will be more readily understood upon a thoughtful deliberation of the following detailed description of the preferred embodiment of the present invention with reference to the accompanying drawings.


REFERENCES:
patent: 2729273 (1956-01-01), Hamilton et al.
patent: 2740464 (1956-04-01), Hamilton
patent: 3813069 (1974-05-01), Fletcher
patent: 4752101 (1988-06-01), Urchenco et al.
patent: 4915449 (1990-04-01), Piretti

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