U.S. patent number 3,880,394 [Application Number 05/413,957] was granted by the patent office on 1975-04-29 for extensible load bracing device.
This patent grant is currently assigned to Bishop-Wisecarver Corporation. Invention is credited to Warren R. Wisecarver.
United States Patent |
3,880,394 |
Wisecarver |
April 29, 1975 |
Extensible load bracing device
Abstract
The bracing device has a steel tube with a rubber covered foot
at one end thereof, which tube has a rectangular cross-section; a
sleeve is welded inside of the tube and a threaded rod is extended
through the sleeve. The inner end of the threaded rod has a square
washer slideably fitting into the interior of the tube so as to
prevent the rotation of the threaded rod; on the outer end of the
threaded rod is the other rubber covered foot for bracing; for
adjusting the length of the brace a nut is provided on the threaded
rod adjacent the open end of the tube, which nut has a hexagonal
portion and a cylindrical portion, and an enlarged disk at each end
for manually turning of the nut; a captive wrench is permanently on
the nut; the hexagonal opening on the captive wrench fits over the
hexagonal portion of the nut but is freely movable over the reduced
cylindrical portion of the nut whereby the wrench can be located on
the hexagonal portion of the nut in any selected position for
conveniently turning the nut in restricted space for changing the
length of the brace.
Inventors: |
Wisecarver; Warren R. (Walnut
Creek, CA) |
Assignee: |
Bishop-Wisecarver Corporation
(San Francisco, CA)
|
Family
ID: |
23639352 |
Appl.
No.: |
05/413,957 |
Filed: |
November 8, 1973 |
Current U.S.
Class: |
248/354.3;
211/123; 410/151 |
Current CPC
Class: |
E04G
25/06 (20130101); E04G 25/065 (20130101); E04G
2025/042 (20130101) |
Current International
Class: |
E04G
25/00 (20060101); E04G 25/06 (20060101); E04h
017/00 (); E04g 021/18 (); E04g 025/00 () |
Field of
Search: |
;248/354S,354R,405
;211/105.4,123 ;254/98 ;403/44,46,49,43 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Foss; J. Franklin
Attorney, Agent or Firm: White; George B.
Claims
I claim:
1. In an extensible load bracing device for engagement with
opposite walls,
a tubular member of polygonal cross-section,
a threaded rod telescoped in the tubular member,
a fixed sleeve in said tubular member having cylindrical inner
periphery to slideably hold said rod,
said rod being extended beyond an end of said tubular member,
a foot on the other end of said tubular member,
a foot on the outer end of said rod,
a nut threaded on said rod adjacent said tubular member,
a neck of reduced diameter on said nut,
a wrench head fitting over said nut for turning the nut,
said reduced portion being of smaller diameter than the interior of
the wrench head to allow loose angular adjustment of said wrench
head,
a wrench handle extended from said wrench head for manipulating
said wrench head for repeated turning of said nut,
and an enlarged disk on each end of said nut for manually turning
the nut independently of the wrench head,
the interior of said wrench head forming a socket fitting over said
nut being loosely turnable on said cylindrical portion,
and a head on the rod having polygonal periphery slidable in the
polygonal inner periphery in said tubular member,
the inner end of said fixed sleeve being spaced from foot end of
the tubular member to determine the limit of movement of said head
and of said rod.
Description
BACKGROUND OF THE INVENTION
This invention relates to the type of brace shown in U.S. Pat. No.
3,049,328.
In the prior art nut and wrench combination has been utilized by
extending a tubular member as shown in U.S. Pat. No. 2,594,443, but
in that patent as well as other patents of which applicant is
aware, complicated ratchet mechanisms are utilized. Such prior
patents are U.S. Pat. No. 2,186,238, 2,080,530, and also the turn
buckle arrangement in the early U.S. Pat. No. 835835.
The primary advantage of the herein invention is that the
adjustment of the length of the brace can be accomplished in
restricted and limited space by reason of the particular
arrangement of the specific nut designed with the captive wrench
which permits initial spinning by hand and then the location of the
wrench at a suitable angle to permit the tightening of the nut and
the brace in the adjusted position.
BRIEF DESCRIPTION OF DRAWINGS
FIG. 1 is a partly sectional fragmental view of the brace
assembly.
FIG. 2 is a cross-sectional view taken on lines 2--2 of FIG. 1.
FIG. 3 is a developed view of the parts of the threaded rod and
captive wrench.
DETAILED DESCRIPTION
A tube 1 of square cross-section has on one end a usually rubber
covered foot 2 mounted by way of a stem 3 held in place by a
cross-pin 4. A sleeve 6 of cylindrical interior is fixed in the
square tube. In the present illustration the interiorly cylindrical
sleeve 6 is welded inside the square tube 1 so that the inner end
of the sleeve 6 is spaced from the foot end of the tube 1.
A rod 7 threaded throughout its entire length is inserted through
the sleeve 6. On the outer end of the rod 7 is secured another
rubber covered foot 8, the hub 9 of which is mounted on the end of
the rod 7. The inner end of the rod 7 has a head 11 thereon
slideably fitting into the square or rectangular interior of the
tube 1 so as to prevent the turning of the rod 7. This rod is
assembled into the tube before the foot 8 is secured thereon and
before the foot 2 is secured on the end of the tube 1. Namely, the
rod is inserted from the foot end of the tube 1 because the head 11
is larger than the diameter of the sleeve 6. The space between the
inner end of the sleeve 6 and the stem 3 of the foot 2 is of
sufficient length to permit the necessary change of length of the
brace by the movement of the threaded rod 7.
Adjacent the open end of the tube 1, namely between the tube 1 and
the hub 9 is provided a nut 12 with a captive wrench 13 thereon.
The nut 12 is threaded on the rod 7 and it has an exterior
hexagonal portion 14 and a turned down or reduced cylindrical neck
16. At each end of the nut is fixed a disk 17 of larger diameter
than the nut, which disk can be engaged manually for spinning the
nut on the threaded rod 7.
The wrench has a head 18 with a hexagonal socket 19 fitting over
the hexagonal portion 14 of the nut. This socket 19 is considerably
larger than the outer diameter of the reduced cylindrical portion
16 of the nut. A handle 21 extends from the head of the wrench 18
so as to hang freely when the socket 19 is on the cylindrical
portion 16 of the nut 12.
In operation the nut is spun manually on the threaded rod 7 thereby
to change the length of the portion of the rod 7 projecting from
the open end of the tube 1. When the adjusted length of the brace
approximates the distance between the walls against which the feet
2 and 8 are to be pressed, the wrench is adjusted to a suitable
angle as permitted by the working space and the socket 19 is
slipped over the hexagonal portion of the nut and the nut is turned
by the wrench handle 21 respectively to tighten or loosen the brace
to the limit of the space for the operation. When the limit is
reached the socket 19 of the wrench is slipped off the hexagonal
portion 14 of the nut 12 and readjusted into its starting position
and slipped over the hexagonal portion again for the next turn.
The brace herein described is simple in structure and operation; it
eliminates the necessity for the expensive and complicated ratchet
mechanisms and also rack and pawl mechanisms used in the prior art;
it permits operation in places where the space is very limited for
manipulation of the telescopic members for length adjustment; it
provides for quick and easy proximation of the length of the space
in which the brace is to be located and then provides for quick and
simple tightening or loosening of the brace as required.
* * * * *