U.S. patent number 3,829,159 [Application Number 05/257,752] was granted by the patent office on 1974-08-13 for treatment chair having improved movable arm support devices.
This patent grant is currently assigned to Pelton & Crane Company. Invention is credited to Dennis F. Leffler.
United States Patent |
3,829,159 |
Leffler |
August 13, 1974 |
TREATMENT CHAIR HAVING IMPROVED MOVABLE ARM SUPPORT DEVICES
Abstract
In a treatment chair having a seat rest and a back rest for
receiving a patient for treatment by an operator, the improvement
of movable arm supports characterized by their ability to move for
easy access to and from the side of the chair by the patient and
easy access to the seated patient by the operator. These arm
supports include a lower arm rest movable from a first position in
which the arm rest is generally parallel with the side edge of the
chair for supporting the lower arm of the seated patient to a
second position in which the arm rest extends generally outwardly
from the side edge of the chair for easy access to and from the
chair from the side thereof by the patient. The movable arm
supports further include upper arm rests mounted on the side edge
of the back rest of the chair and extending forwardly of the chair
in a generally arcuate position for supporting the upper arm of the
patient from rearward and outward movement. The upper arm rests are
constructed to move to other positions toward the seated patient
only for allowing closer access to the seated patient by the
operator.
Inventors: |
Leffler; Dennis F. (Charlotte,
NC) |
Assignee: |
Pelton & Crane Company
(Charlotte, NC)
|
Family
ID: |
22977602 |
Appl.
No.: |
05/257,752 |
Filed: |
May 30, 1972 |
Current U.S.
Class: |
297/411.31;
5/623 |
Current CPC
Class: |
A47C
7/543 (20130101); A61G 15/10 (20130101) |
Current International
Class: |
A47C
7/54 (20060101); A61G 15/10 (20060101); A61G
15/00 (20060101); A47c 007/54 () |
Field of
Search: |
;297/411,416,417,113,115,6,DIG.4,284,290,5,7
;24/248R,249PS,262,263DD ;59/78 ;5/81,89 ;16/150,191,165
;248/313,316,101,361A ;198/189 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Gilliam; Paul R.
Attorney, Agent or Firm: Parrott, Bell, Seltzer, Park &
Gibson
Claims
What is claimed is:
1. In a treatment chair having a seat rest and a back rest for
receiving a patient for treatment by an operator; the improvement
of movable arm support and retaining devices characterized by their
ability to move for easy access to and from the side of the chair
by the patient and easy access to the seated patient by the
operator, said movable arm support devices comprising:
generally horizontally-extending, lower arm rest means including
means mounting said lower arm rest on said chair for movement from
a first position in which said arm rest is generally parallel with
the side edge of said seat rest for supporting the lower arm of the
seated patient from downward movement to a second position in which
said arm rest extends generally outwardly from the side edge of
said seat rest of said chair for easy access to and from said chair
from the side thereof by the patient; and
generally horizontally-extending, upper arm rest means mounted on
the side edge of said back rest of said chair and extending
forwardly of said chair therefrom in a generally arcuate first
position for retaining the upper arm of the seated patient from
rearward and outward movement, said upper arm rest means comprising
a plurality of interconnected segments including one-way means
pivotally connecting said segments to each other for pivotal
movement of said upper arm rest to other positions toward the
seated patient and toward the medial portion of said chair only and
not away from the seated patient beyond said first position for
allowing the operator to move said upper arm rest closer to the
patient for closer access to the seated patient while providing a
retainer against outward movement of said upper arm rest.
2. In a treatment chair having a seat rest and a back rest and
upper retaining arm rest means for receiving a patient for
treatment by an operator; the improvement of generally
horizontally-extending, lower arm rest means including means
pivotally mounting said lower arm rest on said chair for movement
from a first position in which said arm rest is generally parallel
with the side edge of said seat rest of said chair for supporting
the lower arm of the seated patient for downward movement to a
second position in which said arm rest extends generally outwardly
from the side edge of said seat rest of said chair for permitting
easy access to and from said chair from the side thereof by the
patient, said arm rest including a generally horizontally-extending
support portion forming a part of said arm rest and having an upper
generally flat surface for receiving the lower portion of the arm
of a seated patient, and said means mounting said arm rest on said
chair comprises:
a side frame portion carried by said chair and defining a hollow,
downwardly extending, generally cylindrical receptacle for
receiving said arm rest;
a hollow downwardly extending mounting portion forming a part of
said arm rest and including a lower generally cylindrical portion
of less cross-sectional dimensions than said receptacle in said
frame portion for being received by said receptacle and allowing
pivotal movement therebetween;
means for holding said lower portion of said mounting portion in
said receptacle; and
stop means for positioning said lower arm rest means in said first
and second positions comprising an outwardly extending flange
portion having notches therein and being carried by said mounting
portion of said lower arm rest means, a pin member mounted in said
side frame portion of said chair and extending toward said flange
portion for reception by a respective one of said notches when said
lower arm rest means is moved to said first and second positions
and means biasing said flange portion and said notches into
engagement with said pin member.
3. In a treatment chair, having a seat rest and a back rest and
lower arm rest means for receiving a patient for treatment by an
operator; the improvement of generally horizontally-extending,
upper retaining arm rest means mounted on the side edge of said
back rest of said chair and extending forwardly of said chair
therefrom in a generally arcuate first position for retaining the
upper rest of the seated patient from rearward and outward
movement, said upper arm rest means comprising:
a plurality of interconnected segments including one-way means
pivotally connecting said segments to each other for pivotal
movement of said arm rest to other positions toward the seated
patient and toward the medial portion of said chair only and not
away from the seated patient beyond said first position for the
operator to move said arm rest closer to the patient allowing
closer access to the seated patient by the operator while providing
a retainer against outward movement of said arm rest.
4. In a treatment chair, as set forth in claim 3, in which each of
said segments includes a plate means having hinge means on each
side thereof for cooperating connection with hinge means on other
plate means, each of said hinge means including stop means for
abutting engagement with cooperating hinge means to permit pivotal
movement of said segments in one direction only, and in which said
plurality of connected segments include a common, flexible covering
means surrounding said segments and providing a retaining surface
for the upper arm of the seated patient.
Description
This invention relates to a treatment chair having improved movable
arm support devices characterized by their ability to move for easy
access to and from the side of the chair by the patient and easy
access to the seated patient by the operator.
Treatment chairs of the type with which this invention is concerned
are customarily used by dentists, doctors, beauticians, barbers and
others wherein a seated patient is treated by an operator from the
side of the chair. These types of treatment chairs usually include
a back rest, a seat rest and possibly a leg rest and are normally
constructed for reclining movement. Such chairs have presented
problems in providing devices for properly supporting both the
lower arm and upper arm of the patients from downward, rearward and
outward movement.
When arm support devices have been provided for supporting the arms
of the patient from such movements, these devices have restricted
access to and from the chair by the patient from the side of the
chair and close access to the patient by the operator. In treatment
chairs of this type, particularly those having leg rests, the
patient normally enters and exits from the side of the chair and
this is made difficult by stationary lower arm supports extending
along the sides of the chair. Also, upper arm supports designed for
preventing rearward movement and outward movement of the arms of
the patients have presented obstacles to the operators for
obtaining close access to the patient and moving in over the
patient, such as is required particularly in the case of
dentists.
Accordingly, it is the object of this invention to provide a
treatment chair having improved arm support devices characterized
by their ability to move for easy access to and from the side of
the chair by the patient entering and exiting from the chair and
easy and close access to the seated patient by the operator or
operators treating these seated patients.
It has been found by this invention that the above object may be
accomplished by providing improved movable arm support devices in a
treatment chair having a seat rest and a back rest for receiving a
patient for treatment by an operator. These improved movable arm
support devices comprise generally horizontally-extending, lower
arm rest means pivotally mounted on the chair for movement from a
first position in which the arm rest is generally parallel with the
side edge of the seat rest of the chair for supporting the lower
arm of the seated patient from downward movement to a second
position in which the arm rest extends generally outwardly from the
side edge of the seat rest of the chair for easy access to and from
the chair from the side thereof by the patient.
The improved movable arm support devices further comprise generally
horizontally-extending, upper arm rest means mounted on the side
edge of the back rest of the chair and extending forwardly of the
chair therefrom in a generally arcuate position for supporting the
upper arm of the patient from rearward and outward movement. The
upper arm rest means include means for permitting the upper arm
rest means to move to other positions toward the seated patient and
toward the medial portion of the chair only for allowing closer
access to the seated patient by the operator.
Preferably, the treatment chair includes a single pivotally
mounted, movable, lower arm rest means on one side of the chair for
providing easy access by the patient to the chair from the one side
of the chair and a stationary lower arm rest mounted on the other
side of the chair for supporting the lower portion of the other arm
of the seated patient. Also, it is preferable to provide a movable
upper arm rest on each side of the back rest of the chair for
allowing closer access to the seated patient by an operator or
operators from both sides of the chair.
Some of the objects and advantages of this invention having been
stated, other objects and advantages of the invention will be seen
from the accompanying drawings, in which:
FIG. 1 is a perspective view of a treatment chair having the
improved movable arm support devices of this invention incorporated
therein;
FIG. 2 is an enlarged, perspective, exploded view of a portion of
the movable lower arm rest device utilized in the treatment chair
of FIG. 1;
FIG. 3 is a vertical sectional view taken through the portions of
the lower arm rest support device of FIG. 2 in assembled
condition;
FIG. 4 is an enlarged cross sectional view taken generally along
the line 4--4 of FIG. 3;
FIG. 5 is an enlarged cross sectional view taken generally along
the line 5--5 of FIG. 3;
FIG. 6 is a perspective view of the interior of one of the upper
arm rest support devices utilized in the treatment chair of FIG. 1
with the covering thereof shown in phantom lines;
FIG. 7 is an exploded perspective view of two of the plate and
hinge devices utilized in the various segments of the upper arm
support device of FIG. 6;
FIG. 8 is a top plan view of one of the plate and hinge devices
illustrated in FIG. 7; and
FIG. 9 is a sectional view taken generally along the line 9--9 of
FIG. 6 and illustrating the upper arm support device in one of its
other positions in phantom lines.
Referring now to the drawings, a treatment chair, generally
indicated at 10, for use by dentists, doctors, beauticians,
barbers, etc. is illustrated in its entirety in FIG. 1. This
treatment chair 10 includes a back rest 11, a seat rest 12, a foot
rest 13, and a head rest 14, all of which are suitably supported by
frame members and a pedestal, collectively referred to by the
reference numeral 15, from the floor for reclining, forward and
rearward, rotary and other movements. The remaining details of the
treatment chair do not pertain to this invention and further
explanation of the chair itself is not deemed necessary.
In accordance with this invention, a generally
horizontally-extending, lower arm rest 20 is pivotally mounted on
the frame 15 of the chair 10 for movement from a first position,
indicated in phantom lines in FIG. 1, in which the arm rest 20 is
generally parallel with the side edge of the seat rest 12 on the
one side thereof for supporting the lower arm (that portion between
the wrist and elbow) of the seated patient from downward movement,
to a second position, indicated by solid lines in FIG. 1, in which
the arm rest 20 extends generally outwardly from the side edge of
the seat rest 12 of the chair 10 for providing easy access to and
from the chair 10 from that side thereof by the patient.
The treatment chair, illustrated in the drawings, 10 further
includes a stationary lower arm rest 21 mounted on the frame 15 of
the chair 10 on the other side thereof from the movable lower arm
rest 20 for supporting the lower arm portion (that portion between
the elbow and the wrist) of the seated patient.
Although the specific embodiments illustrated in the drawings
include a stationary arm rest 21, it is to be understood that the
treatment chair 10 may also include a movable arm rest 20 on each
side of the chair 10. In this instance, one of the movable arm
rests could be made stationary, as described below.
The treatment chair 10 further comprises upper arm rests 24 mounted
on each side edge of the back rest 11 of the chair 10. These upper
arm rests 24 extend forwardly of the chair in a generally arcuate
position for supporting the upper arm (that portion between the
elbow and the shoulder) of the seated patient from rearward and
outward movement. The upper arm rests 20 include means, to be
described hereinafter, for permitting the upper arm rests 24 to
move to other positions (indicated in phantom lines in FIG. 1)
toward the seated patient and toward the medial portion of the
chair only for allowing closer access to the seated patient by an
operator on either side of the chair 10.
Referring now specifically to the movable lower arm rest 20 (FIGS.
1-5), this movable lower arm rest comprises a generally
horizontally-extending support portion 30 which defines an upper
flat surface and may be covered with any suitable leather or other
material which is commonly used for lower arm rests for receiving
the lower portion of the arm of a seated patient. The arm rests 20
further comprises a hollow downwardly-extending mounting portion 31
integrally formed with the support portion 30 and defining an
internal hollow cavity 32 which extends vertically downwardly
throughout the length of the mounting portion 31 and has open ends.
The hollow cavity 32 includes a lip portion 33 in the upper part
thereof extending inwardly from the walls of the cavity. The lower
part of the mounting portion is formed from a hollow, generally
cylindrical member 35 having an outwardly-extending flange 36
medially thereof with upwardly-extending notches 37 in the bottom
of the flange 36, for purposes to be described hereinafter. The
member 35 is force fitted into the cavity 32 such that the flange
36 contacts the bottom portion of the cavity and the lower portion
of the member 35 extends below to form an extension of the portion
31. The extending part of the member 35 is received by a
cylindrical receptacle 40 formed in a convenient portion of the
frame 15 of the chair 10 in such a manner as to provide pivotal
rotary movements of the arm rest 20 with respect to the frame 15
and the chair 10.
For holding the lower portion of the member 35 in the receptacle
40, a screw member 38 extends through the cavity 32 and the
interior of the hollow member 35. The screw member 38 includes a
threaded portion on the lower end thereof which is received by a
threaded aperture in the frame portion 15 below the receptacle 40,
as shown in FIG. 3. The screw member 38 includes a head on the
upper end thereof and a biasing member in the form of a spring 41
is disposed between the head of the screw member 38 and the
inwardly-extending lip 33 so as to bias the arm rest 20 toward the
frame portion 15 and the receptacle 40.
The lower arm rest 20 also includes a stop means for positioning
the lower arm rest in the above-described first and second
positions in the form of a pin member 42 force fitted into a
horizontally-extending slot in the frame portion 15, as shown in
FIGS. 2, 3 and 4, and extending outwardly therefrom for engagement
in the notches 37 of the flange portion 36 of the arm rest 20. Due
to the bias of the spring 41, the flange portion 36 and the notches
37 are forced into engagement with the pin 42. When movement of the
movable arm rest 20 is desired from one of the above-described
first and second positions, the arm rest 20 is raised against the
bias of spring 41 by rotating the arm rest 20 such that the engaged
notch 37 will be cammed against and lifted above the pin 42 and the
arm rest 20 may be rotated until the next notch 37 comes into
register with the pin 42 and the next notch 37 will engage the pin
42 for holding the arm rest 20 in the moved position.
For preventing the screw member 38 from loosening during pivotal
movement of the arm rest 20, a locking member in the form of a
nylon polyurethane or other suitable plastic insert or plug 45 is
positioned in a suitable aperture across the threaded aperture in
the frame portion 15 receiving the threaded lower end of the screw
member 36 so that the threaded lower end of the screw member 36 is
threaded through the plastic insert or plug 45 for locking the
screw member 36 in place. The insert 45 is held in the aperture of
the frame 15 by a threaded head 46, as may be seen in FIG. 5. By
tightening threaded head 46, plastic plug 45 is swelled against
screw member 38 increasing the force required to turn screw member
38.
The mounting portion 31 of the arm rest 20 may be constructed of
any suitable material and may include a common covering with the
arm support portion 30. However, it has been found preferable to
form the flange 36 of the member 35 and the surface of the notches
37 therein from hardened steel or other suitable material which
will resist frictional wear. Also, it has been found that spacing
of two notches 37 approximately 75.degree. apart will provide
suitable first and second positions for the arm rest 20.
If movable arm rests 20 are disposed on each side of the chair 10,
as suggested above, one of the movable arm rests 20 may be rendered
stationary by screwing the screw member 38 down tight and thereby
preventing disengagement of one of the notches 37 from the pin
42.
Referring now specifically to the movable upper arm rests 24 (FIGS.
1 and 6-9), these movable upper arm rests each comprise a plurality
of segments 50 including means pivotally connecting the segments 50
to each other for pivotal movement in one direction only toward the
seated patient and toward the medial portion of the chair 10, as
shown in FIGS. 1 and 9.
The means for pivotally interconnecting each of the segments 50 of
the upper arm rests 24 for the above-described movement comprises a
plate means 52 having hinge means 53 and 54 on each side thereof.
The hinge means 53 may be considered female hinge members and the
hinge members 54 may be considered male hinge members and the male
hinge members 54 are constructed for cooperating engagement within
the female hinge members 53, as shown in FIG. 6. A pin 55 is
utilized for holding the hinge members 53 and 54 in cooperating
engagement with each other in a conventional manner.
Each of the hinge members 53 and 54 include stop means for abutting
engagement with cooperating hinge members to permit pivotal
movement of the segments 50 in one direction only. These stop
members are in the form of rearwardly-extending flanges 58 and 59
on hinge members 53 and 54, respectively, which are positioned for
abutting the side of the cooperating engaging hinge. For example,
the rearward-extending flange 58 on hinge member 53 abutts the side
of the cooperating hinge 54 and the flange 59 on hinge member 54
abutts the side of the cooperating hinge 53, as shown in FIGS. 6
and 9. This prevents rearward movement of the segments 50 or
outward movement of the segments 50 of the arm rests 24 with
respect to the chair 10. However, the segments 50 may pivot with
respect to each other about the interconnected hinge members 53 and
54 forwardly or toward the seated patient and toward the medial
portion of the chair 10, as shown in phantom lines in FIG. 9.
The hinge members 53 and 54 are generally disposed at approximately
a 4.degree. angle with respect to transverse axes through the plate
members 52 so as to form a generally arcuate configuration for the
upper arm rests 24.
The above-described structure of the upper arm rests 24 and the
segments 50 comprising same may be covered with suitable padding
material, indicated at 60 and the padding material may be covered
with suitable leather or other surface covering material 61 so as
to provide a generally vertically-extending flat upper arm engaging
surface.
Thus it may be seen, that this invention has provided improved
movable arm support devices for a treatment chair which are
characterized by their ability to move for easy access to and from
the side of the chair by the patient and easy access to the seated
patient by the operator.
In the drawings and specification there has been set forth
preferred embodiments of this invention and, although specific
terms have been employed, they are used in a generic and
descriptive sense only and not for purposes of limitation.
* * * * *