U.S. patent number 3,608,857 [Application Number 04/884,231] was granted by the patent office on 1971-09-28 for channel clip for t-bars.
Invention is credited to Richard H. Hibbeler.
United States Patent |
3,608,857 |
Hibbeler |
September 28, 1971 |
CHANNEL CLIP FOR T-BARS
Abstract
A channel clip for suspending a ceiling-supporting T-bar from a
horizontal channel comprising a shank portion having a pair of
hooks at its lower end for resiliently gripping the T-bar and
having at its upper end projecting transverse portions adapted to
hook about the flanges of a channel.
Inventors: |
Hibbeler; Richard H. (Omaha,
NB) |
Family
ID: |
25384223 |
Appl.
No.: |
04/884,231 |
Filed: |
December 11, 1969 |
Current U.S.
Class: |
248/317 |
Current CPC
Class: |
E04B
9/18 (20130101) |
Current International
Class: |
E04B
9/18 (20060101); E04g 017/18 () |
Field of
Search: |
;248/228,229,300,317
;52/484 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Schultz; William H.
Claims
I claim:
1. A channel clip for suspending a ceiling-supporting T-bar from a
horizontal channel comprising: an elongated upright shank portion,
two opposed hook portions disposed in positions spaced from each
other along substantially a horizontal line for receiving a
substantially horizontal T-bar therebetween, said hook portions
each having an upwardly extending outer section, said hook portions
each having a lower section attached to its upwardly extending
outer section and extending away from the respective upwardly
extending section generally in the direction of the other hook
portion, said hook portions each having a top section attached to
the respective upwardly extending outer section, each hook top
section extending away from the respective upwardly extending outer
section in a direction inwardly generally toward an upright line
extending along the elongation of said shank portion and in a
direction transversely of said shank portion, means attaching inner
ends of each hook top section firmly together and to said shank
portion, said hook upwardly extending outer sections each having an
open space therebetween for receiving the upper part of said T-bar,
said lower hook sections having inner ends substantially spaced for
receiving the upper part of said T-bar, at least one of said hook
top sections being resilient and adapted to be bent into an open
position for spreading across the top of said T-bar upper part and
receiving said T-bar upper part between said hooks during
attachment and when released assuming a gripping position with said
hook portions more closely together than in said open position for
the gripping of said T-bar upper part between said hook portions, a
channel attachment portion comprising a hook means connected to the
upper end of said shank portion for attaching said clip to a
horizontal channel member.
2. The clip of claim 1 further comprising said channel attachment
portion having an upwardly extending section disposable alongside
of a vertical web of a horizontally elongated supporting channel,
said channel attachment portion having a first transverse section
disposed transversely to said upwardly extending section and said
first transverse section having one end connected to said upwardly
extending section.
3. The clip of claim 1 in which said means attaching said hook top
section inner ends together is formed of one piece of material with
said hooks and said shank.
4. The combination of claim 1 in further combination with: said
hook top sections being bowed downwardly on their inward sides
sufficiently closely to the lower sections of said hooks
respectively as to substantially prevent excessive movement of a
side edge of said T-bar upwardly so as to prevent excessive
twisting of said T-bar.
5. The combination of claim 1 in which said channel attachment
portion has an upwardly extending section disposable along one side
of the vertical web of a horizontally elongated supporting channel,
said channel attachment portion further having upper and lower
spaced transverse sections extending from and having inner ends
attached to a same side of said upwardly extending section and
generally extending substantially horizontally, said transverse
sections each having a tip portion on the outer end thereof and
extending away from the respective transverse section in a
direction towards the other transverse section so as to extend
across the terminal edge of a respective one of the horizontal
flanges of said channel, said channel attachment portion being
resilient so that said transverse sections can spread apart to
facilitate emplacement of said channel attachment portion on said
channel.
6. The combination of claim 5 in which the lower one of said tip
portions has a terminal end which extends at least partially
horizontally back toward said upwardly extending portion for good
grip on its channel flange.
7. The combination of claim 1 in which the outer parts of said hook
top sections each have twist-resisting portions forming continuous
parts thereof which are disposed so nearly horizontal as to firmly
resist such a twisting of said T-bar as would allow a ceiling
supported by said T-bar to distort and bow upward, the upper and
lower surfaces of those portions of said hook top sections which
are in the area of said twist-resisting portions being
substantially smooth.
8. The clip of claim 1 in which all described parts thereof are
substantially formed of a single piece of material.
9. The combination of claim 1 in which said shank portion is
substantially U-shaped at its lower end and is substantially flat
at its upper end.
10. The combination of claim 1 in which said channel attachment
portion has an upwardly extending section disposable alongside of a
vertical web of a horizontally elongated supporting channel, said
channel attachment portion having a first transverse section
disposed transversely to said upwardly extending section and said
first transverse section having one end connected to said upwardly
extending section, said transverse section having a tip portion on
its outer end and extending away from the respective transverse
section a direction downwardly and inwardly toward said upwardly
extending section.
11. The combination of claim 10 in which said tip portion of said
first transverse section is disposed at an angle of approximately
30.degree. with respect to the horizontal.
12. The combination of claim 10 in which central parts of said
hooks as seen in top plan view are disposed offset from the
transverse section side of said upwardly extending section for
distributing the downward force of said first transverse portion
substantially more evenly.
Description
FIELD OF THE INVENTION
This invention is in the field of channel clips for suspending
ceiling-supporting T-bars from horizontal channels.
DESCRIPTION OF THE PRIOR ART
One of the most common suspension systems of the prior art has
involved a vertically extending rod having a T-bar gripping section
attached to its lower end, the T-bar gripping section being
resilient with two side portions diverging outwardly and downwardly
from a connecting portion and with inturned parts of the side
portions gripping under edges of the T-bar. However, that type had
required tabs struck out of the diverging portions and extending
inwardly for engaging the upper sides of the side edges of the
T-bar to prevent the side edges from moving upwardly by spreading
apart their resilient divergent side portions. There has been a die
cost to the operation of tracking out these tabs and each cost is
extremely important in the competitive marketing of so inexpensive
and simple a product.
To eliminate these struckout tabs would permit the upward movement
of a side of the T-bar, as will cause a ceiling supported by the
T-bar to bow upwardly.
Another product of the prior art has been a channel clip, the lower
portion of which is disposed substantially in a vertical plane with
a vertical slot for providing two legs with recesses receiving the
edges of the T-bar, but having the disadvantage that one of the
legs must be twisted or bent into place on the T-bar. This has the
disadvantage of distorting the mild steel of the T-bar and changing
the ideal dimensions of the T-bar. In addition, it has a more major
disadvantage of high labor cost because this bending and twisting
of a leg to put it in place must all be done at labor cost by men
standing on a scaffold where the work is slow and costly.
The upper end of one prior art T-bar has a channel-gripping
portion, a lower transverse part of which must be bent into place
around the terminal edge of the lower flange of a channel. This
bending is done at high labor cost, also, by men who must work on a
scaffold or ladder.
SUMMARY OF THE INVENTION
A channel clip for suspending a ceiling-supporting T-bar from a
horizontal channel comprising an elongated upright shank portion
with two opposed hook portions resiliently biased toward each other
for tightly engaging edges of the T-bar, the hook portions each
having upper outer parts disposed so nearly horizontal as to firmly
resist a twisting of the T-bar to substantially prevent a twisting
T-bar from spreading the hook portions apart so as to prevent a
ceiling supported by the T-bar from distorting and bowing upwardly,
the upper outer portions of the hook top section not being tabs
punched from the surrounding metal and bent inwardly, as creates
die costs, but instead being continuous parts of the surrounding
metal so that top and bottom surfaces of the hook top sections in
the area of the twist-resisting portions are smooth, whereby
twist-resisting portions are formed by bending the entire area of
each hook top section at the twist-resisting portion, at least one
of the hook top sections being resilient so as to be spread apart
during attachment.
A shank having a channel attachment portion having an upwardly
extending channel attachment portion section disposable along one
side of the vertical web of a horizontally elongated supporting
channel, the channel attachment portion further having upper and
lower spaced transverse sections extending outwardly from a same
side thereof and having tip portions formed for extending across
the terminal edges of the channel flanges, the channel attachment
portions being resilient so that the transverse sections can spread
apart to facilitate emplacement of the channel attachment portion
on the channel without the necessity for bending the ends of the
transverse sections, as has produced high labor cost in the prior
art. One of the tips of one of the transverse portions being
substantially a hook so as to engage both upper and lower sides of
its flange.
The shank, the T-bar gripping portions, and the channel gripping
portion, all being formed of the same single piece of material for
economy of manufacture, the material being thin sheet metal.
BRIEF DESCRIPTION OF THE DRAWING
FIG. 1 is a perspective view of the channel clip of this invention
shown gripping a channel shown in dotted lines and a T-bar also
shown in dotted lines and partially in full line.
FIG. 2 is a sectional view taken substantially along the line 2--2
of FIG. 1.
FIG. 3 is a side elevation of the channel clip in the position in
which it is placed on a channel immediately prior to snapping it in
place about the channel.
FIG. 4 is a frontal elevation of the channel clip as it would be
seen if viewed from the exact front as would be somewhat as seen
from the right-hand side in FIG. 1, the lower portion only being
shown in FIG. 4.
FIG. 5 is a view similar to FIG. 3 but showing a modification of
the invention.
DESCRIPTION OF THE PREFERRED EMBODIMENT
The channel clip of this invention is generally indicated at 10 and
is for supporting a ceiling-supporting T-bar, which latter is
indicated in dotted lines at 12 in FIG. 1.
The channel clip 10 has an elongated upright shank portion
generally indicated at 14, two opposed hook portions generally
indicated at 20 disposed in positions spaced from each other along
a substantially horizontal line disposed in the plane of an upper
horizontal portion 28 of the T-bar 12.
The hook portions 20 each have an upwardly extending outer section
30, and each have a lower section 40 attached to the upwardly
extending outer section 30 respectively and extending away from the
respective upwardly extending outer section 30 generally in the
direction of the other hook portion 20.
The hook portions 20 each have a top section 34 attached to the
respective upwardly extending outer section 30.
Each hook top section 34 extends away from the respective upwardly
extending outer section 30 generally toward a line extending along
the elongation of the shank portion 14 and, therefore,
approximately vertical.
The upwardly extending outer sections 30 of the hooks 20 each have
an open space therebetween, as seen at 50, for receiving the upper
part 28 of the T-bar 12.
The lower hook sections 40 have inner ends substantially spaced for
receiving the intermediate part of the T-bar, which latter is
represented by the upper portion 28 of the T-bar 12 at places
intermediate the ends of the T-bar.
A channel attachment portion is generally indicated at 70 and is
connected to the upper end of the shank portion 14 for attaching
the clip 10 to a horizontal channel member generally indicated at
80 and shown in dotted lines, the channel 80 having an upper flange
82, a vertical web 84, and a lower flange 88, the flanges 82 and 88
extending outwardly from a same side of the web 84. The channel
attachment portion 70 has an upwardly extending section 90
disposable against the outer side of the web 84 and further has
upper and lower spaced transverse sections generally indicated at
100 and 110 extending from and having inner ends attached to a same
side of the upwardly extending section 90 and generally extending
substantially horizontally.
The transverse sections 100 and 110 each have a tip portion
generally indicated at 120 and 130 respectively on the respective
outer end of each and extending away from main portions 138 and 140
of the transverse sections respectively with each tip extending in
a direction toward the opposite transverse section so as to extend
across the respective terminal edge of one of the horizontal
flanges of the channel.
The upper part of the upwardly extending portion 90, the main
portion 138, and the top portion 120 together form a hook
means.
The channel attachment portion generally indicated at 70 is
resilient so that the transverse sections 100 and 110 can spread
apart to facilitate emplacement of the channel attachment portion
on the channel 80 with application being made as shown in FIG. 3 in
which attachment to the channel has barely begun and in which it
can be seen that further bending is the way by which the thin
resilient channel attachment portion can bend around and adapt
itself until it has fully gripped the channel, as shown in FIG.
1.
It is preferred that the lower end of one of the tip portions, and
preferably the lower tip portion 130 have a terminal end 150 which
extends at least partially horizontally back toward the upwardly
extending portion 90 for good grip on its channel flange on both
the top and bottom sides thereof.
As best seen in FIG. 2, the lower transverse section can be punched
out of the material of the upright section 90 in manufacture so as
to leave an opening 170 in the upright section 90, making it
possible to form the lower transverse section 110 integrally with
the upright section 90 and, in fact, integrally and in one piece
with the entire remainder of the clip since the entire clip can be
made of thin gauge material having resilience.
Each hook top section 34 is bowed inwardly at 200 both on its upper
and lower sides since it is formed of thin sheet metal, whereby the
bottom of each hook top section 34 is convex and the top concave,
the down-bending being sufficient as to dispose the down-bent
midpart 200 sufficiently close to the lower sections 40 of the
hooks respectively as to substantially prevent excessive movement
of a side edge of the T-bar upwardly because of a flexing of the
clip, whereby excessive twisting of the T-bar is prevented, and the
ceiling, not shown, which it supports, thereby does not bow
upwardly.
Consequently, portion 200 of each hook top section can be called a
twist-resisting portion 200. These twist-resisting portions 200 are
disposed so nearly horizontal as to firmly resist such a twisting
of the T-bar as would cause substantial distortion and up-bowing of
a ceiling, not shown, that would be attached to the T-bar.
It is important that the twist-resisting portion be formed
continuous with the adjacent parts of the hook top section rather
than being formed by punched-out tabs from the hook top section, as
introduces die costs. And so the structure can be defined as saying
that the upper and lower surfaces of those portions of the hook top
section which are in the area of the twist-resisting portions 200
are substantially smooth as would be a description that would not
apply to the sharply outbent tabs of the prior art.
As best seen in FIG. 2, the lower end of the shank 14 is
substantially of a U-shape having side portions 260 which are
parallel to one another, and as the side portions 260 approach the
center of the shank they become farther spaced apart with the
connecting portion 270 becoming an arc of greater and greater size
until by the time the upper end of the shank portion 14 is reached,
the shank portion 14 has become flat and joins the lower edge of
the upwardly extending portion 90 along a straight line 300.
Referring to FIG. 5, the modification of the channel attachment
portion 70 is there shown in which the second or lower transverse
section 110 is purposely absent and in which the upper or first
transverse section 100 has a special tip portion 120' which,
instead of extending downwardly in a vertical direction, extends
instead partially downwardly and partially inwardly toward the
upwardly extending section 90 and forms an angle of at least
30.degree. with respect to the horizontal and with respect to the
first or upper transverse section 100. It can be seen in FIG. 5
that the transverse section 100 and the special tip portion 120'
form a hook means.
* * * * *