US1650958A

US1650958A - Bolt anchor

Info

Publication number: US1650958A
Application number: US602941A
Authority: US
Inventors: Ogden Ralph Edward; Charles C Tomkinson
Original assignee: Individual
Current assignee: Individual
Priority date: 1922-11-24
Filing date: 1922-11-24
Publication date: 1927-11-29
Anticipated expiration: 1944-11-29

Description

Nov. 29, 1927.

R. E. OGDEN ET AL BoLT ANCHOR Filed Nov. 24. 1922 2 Sheets-Sheet l BY %62 5. C, 731/?0700/1 ZWWM A TTORNE Y Nov. 29, 1927. I 1,650,958

R. E. OGDEN ET AL BOLT ANCHOR Filed Nov. 24, 1922 2 Sheets-Sheet 2 I INVENTOR Fad 272E Qgdqn y I C /as. 6. 7077257050,

ZWM

A TTORNE Y Patented Nov. 29, 192.7.

BNWALL, NEW YORK, AND CHARLES C."TOMKI1\TSON,

Y, ASSIG-NORS TO JOHN EDWARD OGDEN,

RALPH EDWARD OGDEN, OF CO 015 PLAINFIELD, NEW JEBSE TAINVILLE, NEW YORK.

Application filed November 24, 1922.

TEs PATENT OFFICE.

O]? MOUN- BOL'I ANCHOR.

This invention relates to improvements in bolt anchors oi the character employed for obtaining anchorage in walls of brick or stone or cementitious material not adapted to directly receive a threaded bolt.

element or One of the objects of the invention is to provide a shield that may beset deep in the wall and need not extend to the outer end of the opening in the wall in order to be properly and firmly anchored Another object of vide an expansion shield, having therein.

the invention is to proa plurality of exactly similar sections, whereby the manufacturing cost of the shield is a minimum.

reduced to Another object of the invention is to provide an expansion shield and expanding nut therefor so relatively constructed and ar ranged that after expansion the bolt anchored thereby loosening or removing can be removed without the shield and nut.

Further objects of the invention will appear from the following specification taken in connection with the drawings, which form a part of this application, and

view of a bolt Fig. 1 is an elevational in which anchor constructed in accordance with the invent-ion.

- Fig. 2 is an elevational view taken at right angles to Fig. 1.

Fi 3 is an end elevation of the inner D end of the shield and nut shown in Fig. 1.

Fig. 4; is a transverse sectional elevation taken substantially on line 4-4 of Fig. 1.

Fig. 5 is a transverse sectional elevation taken substantially on line 55 of Fig. 6 is a longitudinal sectional elevation taken substantially Fig. 3.

Fig. 7 is a longitudinal on line 6-6 of sectional elevation taken substantially on line 77 ol Fig.

1, showingthe shield in Fig. 8

expanded position. is a longitudinal sectional elevation simllar to Fig. 6 taken at an angle to Fig. 7 and showing the shield in expanded position.

Fig. 9 is an elevational View of one former nut that may be used for expanding the figures.

shield shown in the preceding Figs. 10 and 11 are end elevations of the two ends of the nut shown in Fig. 12 is an elevational view Fig. 9.

of the nut Serial No. 602,941.

shown in Figs. 9, 10 and 11, looking in the direction of the arrow 12 in Fig. 11.

Fig. 13 is an elevational view of another form of nut that may be used in conjunction with the shield shown in Figs. 1 to 8.

Figs. 14.- and 15 are'end elevations of the two ends of thenut shown inFig. 13.

Fig. 16 is an elevational view of the nut shown in Figs. 13, 14 and 15, looking in the direction of the arrow 16 in Fig. 15.

Fig. 17 is an elevational view of another form of nut.

Figs. 18 and 19 are end elevations of the two ends of the nut shown in Fig. 17, and

Fig. 20 is an elevational view of the nut shown in Figs. 17, 18 and 19, looking in the direction of the arrow 20 in Fig. 19.

The invention briefly described comprises an expansion shield formed from a plurality of exactly similar sections, each section having means adapted to overlap the adjacent section, whereby the sections are retained against separation.

In the particular embodiment of the invention shown, the shield comprises a pair of sections, each section having tabs formed thereon, adapted to overlap the other section. These tabs in combination with the nut, which is positioned in the shield for expanding the shield, secure the sections together. The shield also has a plurality of tapered longitudinally extending fingers, having their ends inturned and overlapping the end of. the nut, whereby the nut is retained within the shield.

The nut in the lustrated has with respect to a plane at right angles to its axis, fiat perpendicular and fiat inclined faces hereinafter referred to respec tively as prismatic and pyramidal faces. These faces alternatearound the exterior of the nut. When the nut is mounted in the shield, the prismatic faces are disposed within thelongitudinally extending fingers and 'the tapered or pyramidal faces are disposed formsot the invention ilposite directions at Each section is preferably formed of sheet metal of uniform thickness and has formed thereon a pair of tabs. Each section also has formed in "its outer surface a pair of

annular depressions

32 and 33, these depressions being spaced longitudinally of the sections and the depressions on the respective sections registering when the sections are secured together.

The tabs formed on each section are spaced longitudinally thereon and extend in opdiametrically opposite points when the sections are assembled. These tabs are adapted to seat in the

depressions

32 and 33 and in conjunction with the nut 34 retain the sections against separation.

Looking at Fig. 1, the tabs 35 and 36 are formed on section 31 and extend in opposite directions and seat in the depressed portions 33and 32 respectively of the section 30. In Fig. 5, the tab 36 is also illustrated and in this figure is shown a tab 37 formed on the section 30. The other tab 38 formed on the section 30 is shown in Fig. l.

From this descriptionit will be seen that the two sections are exactly similar and may be used interchangeably and may be formed from the same dies, thereby minimizing the cost of manufacture.

The shield or the shield sections have formedthereon at their inner ends longitudinally extending, tapered fingers 40, the ends 41 of the fingers being inturned and as shown in Fig. 3 overlapping the end of the nut 34, thereby retaining the nut in the shield.

From the showing in the drawings, it will be seen that the shield is substantially cylindrical and prior to expansion the fingers are disposed in the cylindrical outersurface of the shield.

The nut 34 in the particular forms of the invention shown has a composite of prismatic and pyramidal surfaces. These surfaces or faces alternate and in Figs. 1 to 8 inclusive the prismatic faces 42 are disposed within the fingers 40. In this form of the invention four prismatic faces are shown and four pyramidal faces 43 are disposed respectively between the tapered fingers 40.

As the bolt 44 is threaded into the nut, the

nut will travel lengthwise thereon after the.

head 45 of the bolt encounters opposition such as that formed when the head engages and forces an object 46 against the wall in which the anchor is inserted. As the nut travels along the bolt, the portions of the shield engaged by the nut will be forced outwardly, thereby securely anchoring the shield in the opening or bore in the wall in which it is inserted.

The fingers 40 during this operation will be drawnin as. shown in Figs. 7 and 8, there bysecurely retaining the nut against. endwise displacement and, therefore, after the shield has been expanded and anchored the bolt 44 may be withdrawn if desired. This is due to the fact that the flat sides of the nut are drawn under pressure along the inner surfaces of the fingers 40. The depression 32 in the outer surface forms an internal shoulder 47 which in turn forms a stop for limiting the longitudinal movement of the nut in the shield.

In Figs. 10 to 20 inclusive are shown other forms of nuts which may be used in the place of the nut shown in Figs. 1 to 8.

In Figs. 9 to 12, for instance, four prismatic faces 50 and four pyramidal faces 51 are shown.

In Figs. matic and faces.

In Figs. 17 to 20 inclusive six prismatic and six pyramidal faces are shown.

It will be obvious that other combinations of prisms and pyramids may be' made to form a composite of the two types.

Although certain specific embodiments of the invention have been particularly-shown and described, it will be evident that the invention is capable of further modification and that further changes in the construction and arrangement of the cooperating parts may be'made without departing from the spirit or scope of the invention as expressed in thefollowing claims.

W hat we claim is: 1. An expansion shield comprising a tubular member formed by a plurality of sections of uniform thickness, having tapered fingers with inturned ends, a nut embraced by said fingers and projecting therebetween, said nut having fiat prismatic surfaces disposed with- 1-3 to is inclusive both the prispyramidal portions have three n said fingers and having fiat tapered surfaces disposed between the fingers.

2. An expansion shield comprising a pair of exactly similar sections, eachseotionhaving a plurality of tabs spaced longitudinally thereof and overlapping the other section,

said shield having a plurality of longitudinally extending, tapered fingers, and a nut embraced by said fingers.

3.111 combination, a shield having its outer surface substantially cylindrical and having a plurality of longitudinally extending fingers. and a nutembraced by said fingers having prismatic and pyamidal surfaces.

4. In combination, a shield, having its outer surface substantiallycylindrical and having a plurality of longitudinally extend ing' fingers and a fingers having prismatic surfaces disposed adjacent the fingers and pyramidal surfaces between the fingers.

5. In combination, an expansion shield comprising a tubular member having longi tudinally extending, tapered fingers at one end thereof, and a nut adapted to expand of the shield sections nut embraced by said all the shield having prismatic surfaces and pyramidal surfaces.

6. In combination, an expansion shield having a plurality of longitudinally extending tapered fingers and a nut initially embraced by said shield and having flat sur faces engaging the inner surfaces of said fingers and tapered surfaces between the fingers, the nut and shield being. so relatively constructed and arranged that the nut will be retained against endwise and rotational movement when the shield has been expanded thereby.

7. In combination, an expansion shield having a plurality of tapered, longitudinally extendingfingers, and a nut initially disposed within and embraced by the shield and having tapered surfaces extending between said fingers, said nut and shield being so relatively constructed and arranged that the nut will be retained against endwise and rotational movement in the shield by of the nut and shield,

interengaging parts after the shield has nut.

8. In combination, an expansion shield having a plurality of tapered, longitudinally extending fingers curved in cross section, and a nut initially disposed within and embraced by the shield and having tapered surfaces extending between said fingers, said nut and shield being so relatively constructed and arranged that the nut will be retained against endwise and rotational movement in the shield by interengaging parts of the nut and shield, after the shield has been expanded by the nut.

9. In combination, an expansion shield comprising a pair of sections, each section having a plurality of tabs spaced longitudinally thereof and overlapping the other section, the tabs located in one plane transverse to the shield extending circumferentially in one direction and the tabs located in another transverse plane extending circumferentially in the opposite direction, said shield sections having longitudinally extending fingers and a nut disposed in said shield and having flat sides engaged by said fingers.

10. In combination, an expansion shield been expanded by the having an annular depression intermediate its ends forming an internal shoulder, means carried by the shield and seated in the depressed portion to form excess metal therein, and a nut in said shield having a beveled ferentially thereof end engageable with the ridge whereby the ridge forms a stop for limiting the movement of the nut in the shield.

11. An expansion shield formed of sheet metal of uniform thickness and comprising a tubular member having longitudinally extending, transversely tapered fingers and a nut in said member initially embraced thereby and having tapered flat faces engaged by the inner surfaces of said fingers.

12. An expansion shield comprising a pair of sections, each section having a plurality of tabs spaced longitudinally and circumand overlapping the other section, the tabs-located in one plane transverse to the shield extending circumferentially in one direction and the tabs located in another plane transverse to the shield extending circumferentially in the opposite direction, and means within the shield coacting with said tabs to retain the sections together.

18. An expansion shield comprising a pair of exactl similar sections, each section having a p uralit-y of tabs spaced longitudinally and circumferentially thereof and overlapping the other section, the tabs located in one plane transverse to the shield extending circumferentially in one direction and the tabs located in another plane transverse to the shield extending circumferentially in the opposite direction, and means within the shield coacting with said tabs to maintain the sections in parallelism so that the tabs retain the sections together.

14:. An expansion shield comprising a pair of sections, each section having a plurality of tabs spaced longitudinally and circumferentially thereof and overlapping the other section, the tabs located in one plane transverse to the shield extending circumferentially in one direction and the tabs located in another plane transverse to the shield extending circumferentially in the opposite direction, and a nut within the shield engaging the inner surface of both sections 'coacting with said tabs to retain the sections together. 1

In witness whereof, I have hereunto set my hand this 21st day of November, 1922. RALPH ED'WARD OGDEN.

In witness whereof, I have hereunto set my hand this 21st day of November, 1922. CHARLES C. TOMKINSON.