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Патент USA US2115251

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April 26, 1938.
Filed Nov. 23, 1936
2 Sheets-Sheet l
April 26, 1938.
Filed Nov. 25, 1936
2 Sheets-Sheet 2
12:9. 4
123;. J
ézaea: Z7. BUCK
Patented Apr. 26, 1938
George'D. Buck, st. Louis, Mo.
Application November 2:, 1930, Serial No. 112,439
3 Claims. (Cl. 218-19)
My invention relates to expanding tools, and
has for its principal object to produce such a tool
that is simple in design and construction, and
highly efficient in its operation. Another object
shown attached to said unexpanded anchor and
is to produce such a tool so that access to dim
tool is formed with a horizontal passageway H 5
cult locations may be readily obtained and the
operation of the tool be unaffected thereby.
Partition walls in buildings are usually of such
construction, being formed of‘ plaster board, tile,
10 marble, or the like, that it is dimcult to attach
?ttings thereto, such as soap dispensers, junc
tion boxes, towel cabinets, and the like. _ In
many such cases tubular expanding anchors are
employed, the anchor passing through a perfo
ration made in the wall, and afterwards the an
chor is expanded, thereby providing a support
ing member in said partition wall to which the
device tov be mounted on the wall may be secured,
preferably by a screw or threaded bolt. Ordi
narily a series of such anchors is employed, so
that a secure support may be obtained. In the
use of my device a tubular anchor is attached
to said device and then passed through a hole
made in the partition wall to receive it, and then
my device is manipulated to expand the anchor,
such expansion taking place on the inner side
of said wall and the anchor being‘ thereby se
curely held in fixed position. My tool is then
detached from the expanded anchor and with
drawn, when said anchor may be utilized as the
supporting member for the device tobe mounted
on said wall.
For purposes of illustration, I have shown in
one of the views of the annexed drawings a junc
tion box with one anchor in place, duly expanded,
and another anchor in position with my tool ap
be expanded with my expanding tool, which _is
ready for the expanding operation.
In the drawings the head III of my expanding
therethrough adjacent its upper end. Ears l2,
projecting downwardly from the head ID, are
"provided with slots l2 and I‘, through which
slots project bolts l5 andv II, respectively. The
bolts l5 and II pass through perforations in
rounded projections IT and II at the upper end
of a movable handle IS.
The bolt It serves as
the pivotal support for the movable handle I’,
and the slot ll permits a sliding movement of
said bolt II as the handle i9 is manipulated. The
function of the bolt l5 will be hereinafter de
To the inner portion of the head I! is ?xed a
handle 20 secured to said head by a screw 2|.
A ?at spring 22 is bent as at 23 and attached to
the handle I! by the screwbolt 24. The outer
end of the spring 22 engages the handle 20, as
clearly shown in Fig; l. The purpose of the
spring 22 is to normally keep the handles it and
25 in separated position.
In the passageway ii there is mounted a bar‘ 25'
25 .of rectangular shape in cross-section.
bar 25 has a longitudinal passageway 25 there
through to receive a cylindrical rod 21. The rod
21 is provided with a circumferential groove 22 30
near one end thereof to receive two pins 29 en
tering said groove for the purpose of retaining.
the rod 21 securely in the passageway 26. The
pins 29 are apertured at their outer ends to re
ceive a yoke 25 passing through said apertures,
said yoke 35 being loosely placed about the bar
By this '25. Ratchet teeth 2i are provided on the lower’
method a device having a relatively thin at,
face of the bar 25, said teeth being of saw-tooth‘ .
taching wall may be securely placed in position construction. To one end of therod 21 is aillxed
plied thereto, ‘ready to be expanded.
on a. thin partition wall.
- v
Fig. 1 is a side elevation of my expanding tool.
Fig. 2 is an enlarged side view of the head end
of my expanding tool in section, taken on the
line 2--2, Fig. 4.
Fig. 3 is a view, partly in section; taken on the
line 3-4 of Fig. 2, lookingin the direction of
the arrows.
Fig‘. 4 is any enlarged, top plan view of the
head of my expanding tool with some of the
parts in dotted outline.
Fig. 5 is a view, partly in section, of v a junc
tion box placed against a partition wall with one
tubular anchor in expanded condition to secure
said junction box in position and one tubular
anchor in unexpanded condition in position to
a knurled turning member 52 for. the- purpose
of rotating said rod 21.
Screwed into the upper-face of thebar 25 is a
plug 33, which plug is positioned ina slot 34
provided in the outer wall of the head Ill. The
purpose of the plug 22 in the slot 34 is to limit
the‘ horizontal movement of the ‘bar 25 in the
head l5. Fixed in the front'end of the passage
way “ in the head I0 is another bar 35, which
has a longitudinal passageway 36 therethrough
to receive the rod 21. The bar 35 preferably ex 50
tends for a distance beyond the head Ill, so that
the outer face .21‘ of said bar 35 may be employedv
for the expanding operation hereafter to be de
scribed, particularly wheremy tool must operate
efliciently in positions di?icult of access.
The outer end of the rod 21 is screw-threaded
as shownrat II. A yoke-shaped member 22 is
mountedon the head II and provided. with aper
tures to receive the bolt IS. The connecting web
“of the yoke-shaped member 20 engages at one
edge’ the teeth I! on the bar 2!.‘ The yoke
shaped member ‘II is held in engagement with
the toothed face of the bar 2! by a spring 4|,
which spring is provided with arms 42 at its outer
portion, said arms passing into perforations in
the head II to secure said spring II "in position
and having legs abutting the edges oi.’ handle 20
as shown. This permits a rocking motion of the
yoke-shaped member it against the action of
15 thespring II when the handle II is manipulated
for operating the bolt II and the ‘yoke. ll. It
will be noted that the bolt II is adapted for
horisontal movement in the head vll by being
mounted in the elongated slot It. It will be seen
in Fig. 2 that the inner end of the bar 28 con
tacts with the inner end of the bar II, said bar
2| being at the limit of its inner movement as
shown in Fig. 2.
In Fig. 5, I have illustrated'ithe method of
utilization oi ‘my expanding tool, in which A is
the- partition wall, 13 a Junction box, and C a
tubular anchor, in expanded condition securing
the upper portion oi’ the Junction box 13 ‘to the
partition'wall A. It will be understood that per
iorations have been prepared in theiunction box
Band the partition wall ‘A to receive the tubular
ened. apertured portions 11,10 that the anchor
C can. be expanded into the‘ position illiutrated
in the top portion 01' the-view in Pig. 5. The
rod 21 ‘has been rotated by therk'nuriedmember
I2 to cause the engagement of the threaded end
2| 0! said rod to engage with the threaded, re-'
duced portion oi.’ the tubular anchor C. >When '
the tubular anchor C has been expanded to its
desired extent, the rod 21 .is detached from the
tubular anchor by manipulation of ~ the knurled
member 22 to detach the‘ threaded end a of the
rod 21 from the threaded, reduced portion of the
tubular anchor C.
In Fig. 5 the extendedbar "is illustrated to
show the applicability of my expanding tool‘to
a di?erent location, with the tool in
operative condition.
I claim:
mete]! ‘
1. An expanding tool comprising a ,head,'a
slidable bar mounted in said head, said bar being
provided with a longitudinal
1 -
mounted in said longitudinal
IL a rod
ay in said
slidable bar ‘and movable "with said bar, another
bar associated with said head and‘ provided‘ with
a longitudinal passageway therein to'receive said
rod passing loosely through” saidlast-namedgpas
sageway,‘ a toothed portion provided on said
slidable bar, a member associated‘ with said"
toothed portion and adapted to transmit'move
ment to'said slidable bar and rod, a fixed handle
carried bysaid'head, and-a movable handle also
‘ anchor 0. Near the lower portion 01' the‘junc
tion box B is shown an‘ unexpanded, tubular
carried by said head, and associated withsaid'
anchor with my expanding tool. attached there
movement to said slidableibar and rod, and con;
member for moving said member to transmit a
to. The tubular anchor is composed oi.’ an elon ' necting members for permitting said movable
gated bodysD having aheaded end E. The other i handleto‘move, v
T.‘ I .
2. An expanding the! comprising a head,‘ a slid
' end of the expanded anchor C is reduced in di
ameter as at I", the reduced portion being inte
able bar mountediin ‘said head, said bar being‘ '
provided with a longitudinal passageway. a‘ rod ‘
riorly screw-threaded to receive the screw
eway and adapted to ro
40 threaded end ll 01' the rod 21.‘ The expanding secured in said
anchorC is provided with longitudinalslots G
ands series ot'periorations H, so-that when pres
sure is applied by my expanding tool said anchor
will collapse and expand into the position shown
45 at the upper portion ot'the view in Fig. 5.
' In the operation of my device, the tubular
anchorC is ?rst threaded onto the rod 21 with
the head Eoi saidanchor impinging against
‘the outer end of the bar 28.
‘nae-tubular an- I
chor is then passed'through the apertures pro- '
v'ided for its reception in the partition wall A
‘ and. the ?tting,,such as the Junction box B, at_
which‘ time the parts of the expanding tool ap
pear in the position illustrated in, Fig. 5. The
handles ll and"v are then grasped by the oper
ator and the handle I! manipulated to force said
handle I! inwardly toward the-handle 2. against
' the action oi’ the? spring 22, which'oauses the
projecting portion ill to pivot about the'bolt ll,
thus tending to move upwardly the projection I'I
carrying with it the bolt is which moves the
yoke member "outwardly. The connecting‘ web
' ll. oi’ said yoke member”, being engaged at one
side with the teeth lion'the bar II, foroesrsald ,
bar outwardly, carryingwith it the rod 21 and
the threaded, reduced, portion of ‘the tubular
’ anchor C which is engaged by the threaded end
ll of the, rod 21.
As the outer end of the bar" rests against
tate therein, a member abutting onelend of said
slidable bar and secured to said rod and through
which rotary movement mayybe‘imparted to said’
rod, another bar mounted'in said head and pro
vided. with a longitudinal‘ passageway‘ loosely, re? 46
ceiving said rod, a toothed'portlon on saidlslid-v
able bar, a member associated with said
portion, a movable handle carried bysaid head
and secured‘
and ‘atoilxedjhandle
said member
head and adapted to cooperate with'said movable
handle when movement is imparted to said‘mov
able handle.
> ‘
,3. an expansion tool comprising a head, a slid,
able bar mounted in said head, said slidable-bar
being provided with'a longitudinal
another bar also mounted insaid head and ex
tending outside, said head, said other barbeing
provided with'a longitudinal ‘away in s:
istration with the longitudinal
evil? .111"
said slidable bar, a rod
movement in ' the ‘longitudinalv passageways in
said slidable bar and‘ in said'_other bar and mov- -.
able with said slidable bar, said‘rodproiecting'
beyond the outer end oi’ saidother
, ,a mem- '
ber mounted on said rod and secured
“one end I
oi'said rod and through, which rotary movement
may be transmitted to said rod, teeth on‘ one por
tion of said slidable bar, a member e 1 : ;
70, the. outer portion of the head E‘ oi’ the'tubular. teeth, a handle mounted on said-h - [and en
Ianchor C, the tubular- anchor is held ?rmly in ~gaging said member vto permit imparting slid-'
the position illustrated in Fig. 5. Continued ing
?xed to to
‘and co-operating
bar, and another
a movement of the handle I! toward thehandle 2.
causes the tubular anchor C ‘to collapse and ex
pand outwardly, due to‘ the slots G and the weak
said ?rst-named handle;
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