U.S. patent number 3,575,288 [Application Number 04/842,494] was granted by the patent office on 1971-04-20 for adjustable leg assembly.
This patent grant is currently assigned to General Motors Corporation. Invention is credited to Byron L. Brucken.
United States Patent |
3,575,288 |
Brucken |
April 20, 1971 |
ADJUSTABLE LEG ASSEMBLY
Abstract
In the preferred form, an adjustable leg assembly including an
externally threaded, vertically adjustable, leveling member,
adapted to be received in a threaded portion in the base of the
domestic appliance, and furthermore, having an internal bore for
receiving a shipping bolt whereby the domestic appliance may be
rigidly secured to the base of a shipping container by the shipping
bolt and leveling member. Also, the leveling member has a
counterbore adapted to receive a resilient plug when the shipping
bolt is removed from the leveling member at which time a plurality
of such adjustable leg assemblies may be vertically, axially
adjusted with respect to the respective threaded portions in the
base of the domestic appliance so as to level the domestic
appliance when supported on the adjustable leg assemblies.
Inventors: |
Brucken; Byron L. (Dayton,
OH) |
Assignee: |
General Motors Corporation
(Detroit, MI)
|
Family
ID: |
25287450 |
Appl.
No.: |
04/842,494 |
Filed: |
July 17, 1969 |
Current U.S.
Class: |
206/320; 206/599;
248/188.4; 248/615 |
Current CPC
Class: |
A47B
91/024 (20130101); B65D 25/24 (20130101); B65D
19/14 (20130101); B65D 2519/00273 (20130101); B65D
2519/00064 (20130101); B65D 2519/00815 (20130101); B65D
2519/00323 (20130101); B65D 2519/00029 (20130101); B65D
2519/00338 (20130101) |
Current International
Class: |
A47B
91/00 (20060101); A47B 91/02 (20060101); B65D
25/24 (20060101); B65D 19/02 (20060101); B65D
19/14 (20060101); B65D 25/20 (20060101); B65d
019/40 (); B65d 085/68 (); F16m 013/00 () |
Field of
Search: |
;206/46 (FURN.)/ ;206/46
(HWDE)/ ;206/46 (MACH)/ ;229/23 (C)/ ;248/24,188.4,119 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Dixson, Jr.; William T.
Claims
I claim:
1. In an appliance having a number of threaded holes in its bottom
panels for threadedly receiving adjustable leg assemblies and which
is secured to a pallet for shipping, the improvement comprising a
plurality of shipping and adjustable leg assemblies each adapted to
be received within one of said threaded holes, each of said
shipping and adjustable leg assemblies comprising a leveling member
having an externally threaded portion vertically axially adjustably
secured within one of said threaded holes and a head portion
extending below said appliance for supporting said appliance either
on said pallet or in operating position, said threaded portion
having an internal bore of diameter smaller than the minor diameter
of the threads thereon, said head portion having a counterbore
communicating with said internal bore and of diameter larger than
the diameter of said internal bore, a shipping bolt threadedly
engaging said internal bore and having a head on the side of said
pallet opposite to said appliance when said domestic appliance is
supported on said pallet, and a resilient plug of diameter slightly
larger than the diameter of said counterbore and adapted to be
received therein with a snug fit when said shipping bolt is removed
from said leveling member and said appliance is removed from said
pallet, each of said leveling members being adapted for manual
rotation at said head portion for movement thereof vertically
axially with respect to one of said threaded holes to level said
domestic appliance in its operating position.
2. The shipping and adjustable leg assemblies of claim 1 wherein
said leveling member is made of polypropylene, said shipping bolt
has a threaded portion with a diameter slightly larger than the
diameter of said internal bore, and said counterbore communicates
with said internal bore by means of a tapered passageway to
facilitate the initiation of a thread cutting function by said
shipping bolt as it threadedly engages said internal bore.
3. The shipping and adjustable leg assemblies of claim 1 wherein
said leveling member includes another head portion at the opposite
end thereof from the first said head portion to adapt said leveling
member for manual rotation from above the bottom panels of said
appliance.
4. In an appliance having a number of threaded holes in its bottom
panels for threadedly receiving adjustable leg assemblies and which
is secured to a pallet for shipping, the improvement comprising a
plurality of shipping and adjustable leg assemblies each adapted to
be received within one of said threaded holes, each of said
shipping and adjustable leg assemblies comprising a leveling member
having an externally threaded portion vertically axially adjustably
secured within one of said threaded holes and a head portion
extending below said appliance for supporting said appliance either
on said pallet or in operating position, said threaded portion
having an internal bore of diameter smaller than the minor diameter
of the threads thereon, and a shipping bolt threadedly engaging
said internal bore and having a head on the side of said pallet
opposite to said appliance when said domestic appliance is
supported on said pallet, each of said leveling members being
rotatable by said head portion for movement vertically axially with
respect to one of said threaded holes to level said domestic
appliance in its operating position when said shipping bolt is
removed from said leveling member and said appliance is removed
from said pallet.
Description
The present invention relates to a novel adjustable leg assembly
for attachment to threaded members in the base of a domestic
appliance and which may be axially movable with respect to the base
of the domestic appliance so as to adjust the domestic appliance in
a level position. Among the objects of the present invention is the
provision of a novel adjustable leg assembly having a leveling
member adapted to receive a shipping bolt for securing the domestic
appliance in a shipping container.
Another object of the present invention is the provision of the
counterbore in the leveling member of the adjustable leg assembly
adapted to receive a resilient pad whereby the leveling member and
the resilient pad act as a foot for the domestic appliance.
Still another object of the present invention is the utilization of
an externally threaded leveling member which is axially adjustable
with respect to the base of the domestic appliance to level the
domestic appliance, and which can be used as a device for securing
the domestic appliance to a shipping container during shipping and
for retaining a resilient plug at a final destination or
location.
By this novel construction and assembly, the appliance manufacturer
can readily and easily assembly the adjustable leg assembly on the
appliance and use the assembly as a securing device during
shipping. Thereafter, the party installing the same in its
operative position in the home, or other place of use, can readily
remove the shipping bolt, insert the resilient plug, and vertically
adjust each of the adjustable leg assemblies to level the domestic
appliance in its operative position upon the floor or supporting
structure at the ultimate location.
Further objects and advantages of the present invention will be
apparent from the following description, reference being had to the
accompanying drawings, wherein a preferred embodiment of the
present invention is clearly shown.
In the drawings:
FIG. 1 is a front right isometric view of a domestic appliance
within a shipping container with a lower front corner of the
appliance and its container broken away to show the adjustable leg
assembly of the present invention;
FIG. 2 is an enlarged sectional view of the lower right front
corner of the domestic appliance within the shipping container
showing the adjustable leg assembly in greater detail; and
FIG. 3 is an enlarged sectional view of the lower right front
corner of the domestic appliance removed from the shipping
container with the shipping bolt removed and the resilient plug
inserted into the leveling member of the adjustable leg
assembly.
In accordance with this invention and with reference to FIG. 1, a
domestic appliance 2 is positioned within a shipping container 4
having a base or wooden shipping pallet 6. The domestic appliance 2
may be of any type, but more particularly of the type where it is
desirable to operate in a level position and thus require
adjustable leveling legs such as the adjustable leg assembly 10.
This would include both clothes washing machines and dryers. While
it is contemplated that several such assemblies be used with each
appliance, only one is described in detail as representative of
each such assembly.
The adjustable leg assembly of the present invention is more
clearly shown in detail in the enlarged views, FIGS. 2 and 3. The
adjustable leg assembly 10 includes a leveling member 12 having an
externally threaded portion 14 and the head portion 16. The
domestic appliance 2 is provided with a base formed of bottom
panels such as 18 which in turn is provided with a threaded portion
or member 20 located in each corner of the base. The preferred form
of this threaded member 20 is shown in FIGS. 2 and 3 and is a
thread formed in the base panel 18. However, it is within the
contemplation of this invention to use other types of threaded
members such as a nut welded to the base panel 18 or other forms of
threaded members securely fastened to the base panel 18. The
externally threaded portion 14 of the leveling member 12 has an
external helical thread 22. This externally threaded portion 14 is
received by the threaded member 20 and is axially adjustable with
respect to the threaded member 20 due to the helical thread 22 when
the leveling member 12 is rotated. Rotation of the leveling member
12 is facilitated by the head portion 16 of the leveling member 12
which in preferred form would be hexagonal in cross section so as
to be adapted to be received by a wrench or other similar tool. The
other end of the leveling member is also provided with a head
portion 17 of hexagonal cross section.
The leveling member 12 is also provided with an internal bore 24
which in the preferred form extends through both the head portions
16 and 17 and the externally threaded portion 14. However, it is
also contemplated that this internal bore need not extend all the
way through the externally threaded portion 14. Furthermore, in the
preferred form, the internal bore 24 is nonthreaded. The
counterbore 26, concentric with the internal bore 24 is located
within the head portion 16 of the leveling member 12.
In accordance with one of the objects of this invention, the
internal bore 24 is adapted to receive a shipping bolt 28 which is
also part of the adjustable leg assembly. The shipping bolt 28 has
a threaded portion 30 and a head portion 32. When the shipping bolt
28 is inserted into the internal bore 24 and rotated, the shipping
bolt itself forms a thread 34 within the internal bore 24 so as to
be snugly retained within the leveling member 12. In the preferred
form, the internal bore 24, at the end toward the counterbore 26,
is provided with an elongated frustoconical or tapered passageway
36 concentric to the internal bore 24. This tapered portion aids in
initiating a standard shipping bolt in the thread cutting function
as the bolt is rotated and thus inserted into the internal bore 24.
When the shipping bolt 28 is removed from the internal bore 24,
threads 34 formed by the shipping bolt would remain as shown in
FIG. 3. However, the internal bore 24 may be previously
threaded.
Since in the preferred form, the internal bore 24 is nonthreaded
and the shipping bolt 28 performs a thread cutting function, the
adjustable leg assembly leveling member 12 is made of
polypropylene. The leveling member 12 is made from one piece of
polypropylene so as to be less expensive in manufacture.
Furthermore, the relative softness of polypropylene to steel makes
it easier to form the internal threads 34 of the internal bore when
the shipping bolt 28 is inserted into the internal bore. As the
shipping bolt 28 cuts the threads 34, the shipping bolt is secured
with respect to the leveling member 12 and thus firmly holds the
domestic appliance to the shipping container base 6. Also the use
of a plastic permits plastic deformation of the external threads 22
to provide a further friction locking action between the assembly
10 and the threaded member 20 of base panel 18.
When the domestic appliance 2 within the shipping container 4
arrives at its final destination, the shipping bolts 28 are removed
from the assemblies 10, thus freeing the domestic appliance from
the base 6 of the shipping container. The domestic appliance is
then removed from the shipping container. Since the shipping bolt
28 is now removed from the leveling member 12, the counterbore 26
is free to receive a plug 38. This plug 38 is resilient and is
preferably made of rubber. This resilient plug 38 along with the
leveling member 12 acts as a foot for the domestic appliance when
the domestic appliance is set up at its final destination. The use
of the resilient plug 38 is particularly helpful for a domestic
appliance which has certain natural vibrations. On other
appliances, the plug 38 is not necessary as the plastic member 12
itself will not be destructive to a floor.
Either head portion 16 or 17 of the leveling member 12, now
receiving the plug 38, is adapted to be received by a wrench so as
to be rotated causing the external helical thread 22 to coact with
the threaded member 20 of the domestic appliance base 2 so as to
cause axial or vertical movement of the adjustable leg assembly
with respect to the domestic appliance 2. When the domestic
appliance is provided with a plurality, for example, four of these
adjustable leg assemblies, each of these adjustable leg assemblies
may be so vertically adjusted so as to level the domestic appliance
on its final destination.
A typical preferred form of this invention includes a polypropylene
leveling member having an externally threaded portion 14 with a
dimension A of approximately 1.40 inches with each of the hexagonal
head portions 16 and 17 having a dimension B of approximately 0.50
inch. The external helical thread has six threads per inch with a
minor diameter of 0.70 inch, a pitch diameter of 0.80 inch and a
major diameter of 1.0 inch. The internal bore has approximately a
0.25 -inch diameter and is nonthreaded before the shipping bolt is
inserted. The tapered portion 36 of the internal bore 24 is
frustoconical approximately 0.50 inch long and gradually and
continuously flares outward from a 0.25-inch diameter to a 0.375
-inch diameter or approximately a 7.degree. taper. The counterbore
26 is approximately 0.75 inch in diameter and has approximately a
0.40 -inch depth. The portion of the rubber plug 38 which extends
into the counterbore has a diameter of approximately 0.765 inch so
as to provide a snug fit whereby the resilient plug is retained
within the counterbore. The outer portion of the rubber plug has a
diameter of approximately 1.24 inches so as to approximately cover
the 1.25 -inch hexagonal head portion.
It is thus seen that a single easily manufactured leveling member
provides both a retainer member for securing the domestic appliance
to a shipping container during shipping and a leveling member for
the domestic appliance at its final point of destination. While the
embodiment of the present invention as herein disclosed constitutes
the preferred form, it is to be understood that other forms might
be adopted.
* * * * *