U.S. patent application number 09/771606 was filed with the patent office on 2002-08-01 for chair having forward tilting device.
Invention is credited to Chang, Horng Jiun.
Application Number | 20020101102 09/771606 |
Document ID | / |
Family ID | 25092373 |
Filed Date | 2002-08-01 |
United States Patent
Application |
20020101102 |
Kind Code |
A1 |
Chang, Horng Jiun |
August 1, 2002 |
Chair having forward tilting device
Abstract
A chair includes a base having two rear posts, two pairs of
levers having rear ends pivotally secured to the posts and having
two lever members located above the other two lever members. A seat
has two front legs extended downward and pivotally secured to the
front ends of the levers with pivot axles for allowing the seat to
move up and down relative to the base. An actuating device is
disposed on the base and coupled to the front end of the seat for
elevating the seat relative to the base and for rotating the legs
of the seat and for tilting the seat relative to the base.
Inventors: |
Chang, Horng Jiun; (Chang
Hua Hsien, TW) |
Correspondence
Address: |
CHARLES E. BAXLEY
59 John Street-5th Floor
New York
NY
10038
US
|
Family ID: |
25092373 |
Appl. No.: |
09/771606 |
Filed: |
January 30, 2001 |
Current U.S.
Class: |
297/330 |
Current CPC
Class: |
A61G 5/14 20130101 |
Class at
Publication: |
297/330 |
International
Class: |
A47C 001/02 |
Claims
I claim:
1. A chair comprising: a base including a rear portion having a
pair of posts extended upward therefrom, two pairs of levers
including a rear end pivotally secured to said posts respectively,
and each including a front end, and each including a first lever
member located and provided above a second lever member, a seat
including a front portion having a pair of legs extended downward
therefrom and pivotally secured to said front ends of said pairs of
levers with pivot axles for allowing said seat to move up and down
relative to said base, said seat including a bracket disposed on
said front portion thereof and located forward of said legs, and an
actuating device disposed on said base and coupled to said bracket
for elevating said seat relative to said base and for rotating said
legs of said seat relative to said first levers and for tilting
said seat relative to said base.
2. The chair according to claim 1, wherein said legs each includes
a lower end, said seat includes a rear portion and includes a pair
of stays secured between said rear portion of said seat and said
lower ends of said legs.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates to a chair, and more
particularly to a chair having a forward tilting device for
facilitating the standing up of the disabled person from the
chair.
[0003] 2. Description of the Prior Art
[0004] Typical chairs may include an elevating device for elevating
the seat portion or the seat cushion of the chair. However, the
seat portion may not be tilted forward such that the disabled
persons also may not easily stand up from the elevated chair.
[0005] The present invention has arisen to mitigate and/or obviate
the afore-described disadvantages of the conventional chairs.
SUMMARY OF THE INVENTION
[0006] The primary objective of the present invention is to provide
a chair including a forward tilting device for facilitating the
standing up of the disabled person from the chair.
[0007] In accordance with one aspect of the invention, there is
provided a chair comprising a base including a rear portion having
a pair of posts extended upward therefrom, two pairs of levers
including a rear end pivotally secured to the posts respectively,
and each including a front end, and each including a first lever
member located and provided above a second lever member, a seat
including a front portion having a pair of legs extended downward
therefrom and pivotally secured to the front ends of the pairs of
levers with pivot axles for allowing the seat to move up and down
relative to the base, the seat including a bracket disposed on the
front portion thereof and located forward of the legs, and an
actuating device disposed on the base and coupled to the bracket
for elevating the seat relative to the base and for rotating the
legs of the seat relative to the first levers and for tilting the
seat relative to the base.
[0008] The legs each includes a lower end, the seat includes a rear
portion and includes a pair of stays secured between the rear
portion of the seat and the lower ends of the legs.
[0009] Further objectives and advantages of the present invention
will become apparent from a careful reading of a detailed
description provided hereinbelow, with appropriate reference to
accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0010] FIG. 1 is a perspective view of a skeleton of a chair in
accordance with the present invention;
[0011] FIG. 2 is a partial exploded view of the chair; and
[0012] FIGS. 3, 4, 5 are plane schematic views illustrating the
operation of the chair.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
[0013] Referring to the drawings, and initially to FIGS. 1-3, a
chair in accordance with the present invention comprises a base 2
including a pair of posts 21 extended upward from the rear portion
thereof, and including a bar 22 provided in the middle or the rear
portion thereof. Two pairs of levers 17, 18 have the rear ends
pivotally secured to the posts 21 with pivot pins 23. An elevating
or actuating device 7 is secured on the base 2, such as secured to
the bar 22 of the base 2, and may be a hydraulic actuator, a
pneumatic actuator, or a motor 7 coupled to a motor-actuated
retractable and extendible actuator 71 for actuating the actuator
71 to elevate and to tilt a seat portion 1 of the chair.
[0014] The seat 1 includes a rear beam 14, and a front beam 16, and
two legs 15 extended downward from the front portion of the seat 1,
and two stays 13 secured between the rear portion of the seat 1 and
the lower ends of the legs 15. A lower beam 12 is secured between
the lower ends of the legs 15 The front ends of the levers 17, 18
are pivotally secured to the legs 15 with pivot axles 27, 28, and
the lever 17 is located above the leg 18 and preferably parallel to
the leg 18 such that the legs 15 and thus the seat 1 may be moved
up and down relative to the base 2 by the pivotal movement of the
levers 17, 18 relative to the legs 15 and the posts 21. The seat I
includes a bracket 161 secured and provided in the front and middle
portion thereof. A foot support 4 is attached to the front portion
of the seat 1 for supporting the feet of the users. A seat back 3
is secured to the rear portion of the seat 1.
[0015] As best shown in FIGS. 3-5, the free end of the actuator 71
of the actuating device 7 is pivotally secured to the bracket 161
of the seat 1 with a pivot shaft 73. The bracket 161 is located in
front of or forward of the legs 15.
[0016] In operation, as shown in FIGS. 3 and 4, the seat 1 and the
user may be elevated by the actuating device 7 and by the pivotal
coupling of the levers 17, 18 between the posts 21 of the seat 2
and the legs 15 of the seat 1, when the actuating device 7 applies
a force against the bracket 161 of the seat 1. When the seat 1 and
the legs 15 have been elevated to a predetermined height relative
to the base 2 and when the actuating device 7 further applies a
force against the bracket 161, the legs 15 may be forced to rotate
relative to the lever 17 about the pivot axle 27 and the lower ends
of the legs 15 may be forced to move rearward (FIG. 5) because the
bracket 161 is located forward of the legs 15 and the pivot axles
27, 28, such that the seat 1 may be tilted forward and such that
the user may be facilitated to stand up when the seat 1 is tilted
forward.
[0017] Accordingly, the chair in accordance with the present
invention includes a forward tilting device for facilitating the
standing up of the disabled person from the chair.
[0018] Although this invention has been described with a certain
degree of particularity, it is to be understood that the present
disclosure has been made by way of example only and that numerous
changes in the detailed construction and the combination and
arrangement of parts may be resorted to without departing from the
spirit and scope of the invention as hereinafter claimed.
* * * * *