U.S. patent number 3,729,161 [Application Number 05/076,661] was granted by the patent office on 1973-04-24 for adjustable shelf bracket.
This patent grant is currently assigned to Streater Industries Inc.. Invention is credited to Earl Christensen.
United States Patent |
3,729,161 |
Christensen |
April 24, 1973 |
ADJUSTABLE SHELF BRACKET
Abstract
A one piece adjustable shelf bracket having two hooks or lugs
which hook into slots in a vertical post. The bracket is angularly
adjustable in a vertical plane and the hooks are designed to
vectorize loads applied to the shelf so that forces are applied
from the hooks to the slotted post in three or four different
places. This provides for an even and efficient distribution of the
shelf load.
Inventors: |
Christensen; Earl (Albert Lea,
MN) |
Assignee: |
Streater Industries Inc.
(Albert Lea, MN)
|
Family
ID: |
22133441 |
Appl.
No.: |
05/076,661 |
Filed: |
September 30, 1970 |
Current U.S.
Class: |
248/242;
108/108 |
Current CPC
Class: |
A47B
57/045 (20130101) |
Current International
Class: |
A47B
57/04 (20060101); A47B 57/00 (20060101); A47g
029/02 () |
Field of
Search: |
;248/242,241,235,247,240.4,291,293 ;108/106,108,110 ;312/248 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
|
|
|
|
|
|
|
968,263 |
|
Sep 1964 |
|
GB |
|
696,712 |
|
Oct 1964 |
|
CA |
|
287,489 |
|
Jan 1963 |
|
NL |
|
Primary Examiner: Foss; J. Franklin
Claims
I claim:
1. A one-piece multiple angle shelf bracket for use with a pair of
upper and lower slots of a pilaster having a column of uniformly
spaced slots, comprising, an arm adapted to support a shelf, a hook
shaped upper lug attached to said arm having a curved surface
portion and an end point which is the center of said curved surface
portion, said upper lug being cooperable with said upper slot, said
curved surface portion engaging the lower side of said upper slot
for all positions of said bracket, a lower lug having a plurality
of teeth and being attached to said arm, said lower lug being
cooperable with said lower slot, said teeth being ratchet type
teeth which intersect on a circular arc of which said upper lug end
point is the center thereof.
2. A shelf bracket according to claim 1 wherein each of said teeth
has the form of a ramp with an inclined edge and a step edge, each
said step edge being on a radial line relative to said end point of
said upper lug.
Description
The invention relates to a new and improved adjustable shelf
bracket of the type which can be mounted to occupy several angular
positions.
Shelving plays an important role in the modern merchandising of
various products of the type sold in department stores, hardware
stores and drug stores. The fixed horizontal shelf is of course
very useful but the flexibility afforded by angularly adjustable
shelves in making display arrangements is very desirable. Although
one-piece adjustable shelf brackets are found in the prior art
there are still improvements to be made with regard to designing
the hooks so that the shelf loads to be accommodated are vectorized
in a manner such that reaction forces are more evenly and
efficiently distributed. The bracket of the present invention has a
hook design wherein forces from the hooks are applied to the
vertical, slotted pilaster or standard in three or four different
places and this allows the bracket to be of less rugged
construction so as to be more inexpensive or, if the bracket is
made with a heavier construction, allows greater shelf loading.
A main object of the invention, therefore, is to provide a new and
improved adjustable shelf bracket which provides a novel
distribution of the shelf loads which gives the advantages referred
to above. Another object of the invention is to provide a new and
improved adjustable shelf bracket assembly which is readily
adjustable, is inexpensive to manufacture and has great
utility.
Other objects and advantages of the invention will become apparent
from the following specification, the drawing and appended
claims.
The drawing is a side elevational view, partly in section, of a
shelf bracket made in accordance with the invention and shown
mounted in conventional slotted pilaster.
In the drawing a shelf bracket 10 made of sheet metal or some other
suitable material is attachable to a conventional vertically
extending pilaster 12. Pilaster 12 has vertically arranged,
uniformly spaced slots of which slots 13 to 17 are illustrated.
Bracket 10 comprises an arm 19 and rearwardly extending upper and
lower lugs 20 and 21 which are insertable into and cooperable with
a pair of pilaster slots which normally would be adjacent slots.
Upper lug 20, which is shown inserted in slot 14, is generally hook
shaped with a curved surface portion 24 and an end point 25 which
is the center of the curved surface portion 24. The curved surface
portion 24, to the extent that it is of interest herein, merges
with the arc line 26 for which the end point 25 is the center.
Lower lug 21, which is shown inserted in slot 15, has a plurality
of ratchet-like teeth 28 with each tooth being formed with an
inclined edge 29 and a step edge 30. The adjacent end of the arm 19
is formed with an edge 30' which for practical purposes is of the
same character with regard to function as the tooth edges 30.
The step edges 30 and 30' are each on a radial line relative to the
end point 25 of the upper lug 20, this being indicated by the
radial construction lines 32 to 35 which are uniformly angularly
spaced. The respective points of intersection 37 between the
inclined edges 29 and the step edges 30 are on a circular arc 38 of
which the upper lug end point 25 is the center thereof. At this
point it may be mentioned that the surface portion 24 of upper lug
20 that is of special interest herein is only the portion between
the radial construction lines 32 and 35.
With the construction described and illustrated the bracket 10 has
four angular positions which are the level position shown in the
drawing, one angular position above the level position and two
angular positions below the level position. In each of the four
angular positions the end point 25 of the upper lug 20 maintains
the same point of contact with the pilaster 12. The upper lug
surface portion 24 has contact with the lower edge of slot 14 for
each of the four angular positions. The lower lug 21 has contact
with the lower edge of slot 15 for each of the angular positions
with an inclined edge 29 bearing downwardly and a step edge 30
bearing rearwardly.
The bracket 10 thus has four points of contact with the pilaster 12
and this has the effect of providing four reaction forces for the
single applied force 40 to which the arm 10 would be subjected by a
loaded shelf. This provides a good distribution of forces with
regard to the ability of lugs 20 and 21 to accommodate them such
that, relatively speaking, a greater applied force 40 is
withstandable. Also, with this construction the ratchet type teeth
28 are short and stubby such that they are relatively very strong
for this application. In addition, angular adjustments are easily
made by reason of the lugs 20 and 21 occupying only about
two-thirds the heights of the slots 14 and 15. It is thus a simple
matter to lift the arm 10 vertically in connection with rotating it
to move it to a new angular position.
* * * * *