US1100661A - Expansion-anchor. - Google Patents

Description

J. KENNEDY. EXPANSION ANCHOR. APPLIOATION FILED JULY 20,1912.

1, 1 00,661 Patented June 16, 1914.

ZWITNESSES I zy ATTORNEY NTTED STATES PATENT OFFICE.

JOSEPH KENNEDY, OF NEW YORK, N. Y., ASSIGNOR TO THE CLEMENTS COMPANY, A CORPORATION OF NEW YORK.

EXPANSION-ANCHOR.

Specification of Letters Patent.

Patented June 16, 1914.

Application filed July 20, 1912. Serial No. 710,589.

To all whom it may concern:

Be it known that I, JOSEPH KENNEDY, a citizen of the United States, and a resident of the city, county, and State of New York, have invented certain new and useful Improvements in Expansion-An chors, of which the following is a specification, reference being had to the accompanying drawings forming a part thereof.

My invention relates to improvements in expansion anchors of the character employed for obtaining anchorage in brick or stone walls or the like, of which the material is of a character not adapted to directly receive and hold a threaded bolt.

A feature of the present invention contemplates in addition to the provision of a longitudinally segmental anchor having its outer surface corrugated or ribbed for a portion of its length which makes it better adapted to engage the sides of the hole in the wall when forced apart by its expander, the construction of the anchor which provides for the bolt which is used with it acting upon an expander and also engaging the inner end of the anchor itself in the manner which is illustrated in the accompanying drawings which I describe in the following specification and the novel features of which I will set forth in appended claims.

Referring to the drawings :Figure 1 is a side elevation of an anchor constructed in accordance with my invention together with a bolt. Fig. 2 is a transverse vertical section of the same parts taken on the line 22 of Fig. 1 and drawn on a somewhat larger scale. Fig. 3 is a central longitudinal elevation of the bolt and anchor with the an chor and its expander shown in section, the view being taken at right angles to that shown in Fig. 1. Fig. 4 is a transverse vertical section on an enlarged scale taken on the line 44 of Fig. 3. Fig. 5 is a central longitudinal section showing the anchor expanded. Fig. 6 is a side elevation on an enlarged scale of a conical expanding member or nut.

Like characters of reference designate corresponding parts in all of the figures.

The anchor comprises a shell divided longitudinally throughout its length into two parts 10 and 11. This shell has a longitudinal bore of which the forward portion 12 is cylindrical and smooth and but slightly greater than the diameter of the bolt which is to be used therewith. At the inner end of this cylindrical part of the bore is a portion 14 which may be conical with its sides diverging from the end of the cylindrical portion toward the inner or rear end of the anchor. The anchor or larger end of this conical portion 14 is joined with a shallow beveled recess 15 formed in the inner end wall 16 of the anchor. Through the end of this end wall a hole 17 is provided which is somewhat smaller than the diameter of the bolt.

At the line of joinder of the two parts of the shell the inner portion of it is provided with a pair of substantially diamond shaped recesses 19. These recesses are adapted to receive correspondingly shaped ears or lu s 20 which project laterally from the perip 1- ery of a nut 21 which in this case is conical and is adapted to be held within the conical bore 14. This nut and its lugs 20 are of such size and shape that they allow the two parts 10 and 11 of the shell to lie together before expansion. The sides of the lugs 20 are undercut as shown at 22. This is for the purpose of preventing the sides of the shell at recesses 19 being pushed out over the lugs by lateral bending. In fact this construc tion gives the metal of the shell a tendency to grip the lugs of the expander more tightly and to prevent loss of expansion due to the spreading of the sides of the shell. This feature is set forth and claimed in my copending application Serial No. 696,675 filed May 11, 1912, and is not an essential part of my present invention. The nut 21 is threaded to receive a bolt 23.

In use a hole is drilled in the wall or other structure of sufiicient size to permit the insertion of the anchor. The bolt is then screwed into the nut 21 and through it until it engages the rigid inner end wall 16 of the shell. A further rotation of the bolt forces the nut forward and as the lugs 20 prevent the expanding nut from turning their wedge-like or tapered form causes the desired expansion to be effected. When the the inner ends of the two parts of the shell bending in toward each other, thereby providing a holding bearing at the rear end of the shell and establishing a bearing against the surfaces of the hole in the wall throughout the length of the shell. As soon as the nut has advanced a sufficient amount to ob-.

tain :a holding effect of the shell upon the wall, the .bolt may be advanced through the nut to tighten any object which may be between the head of the bolt and the surface of the wall, against such surface without the necessity of having any thrust bearing upon the outer end of the shell. If such parts become loose, a further turning of the bolt will produce a further expansion to obtain a new hold upon the surface of the hole and to again tighten the object.

If desired the end walls may be made beveled as shown so that the pressure of the end of the bolt against them also tends to force the two parts of the shell apart. The corrugations on the outside of the shell pre sent a .rough surface which .aids in preventing the withdrawal of the anchor from the wall especially when the device is used in comparatively soft material such as brick or concrete.

What I claim is l. A bolt anchor comprising a tubular shell split longitudinally, an internally threaded longitudinally movable expander within said shell, and rigid members integral with the parts of said shell forming a transverse bearing surface, said members being constructed to form a central opening smaller than the bolt which is to be used with said anchor, the sides of said opening forming bearing surfaces for the bolt after the parts of'the shell are expanded.

2. A bolt anchor comprising a tubular shell split longitudinally, an internallyi threaded longitudinally movable expander within said shell, means for preventing rotation of said expander relative to the shell, and rigid members integral with the parts- :of the shell forming a transverse bearing inner end of the shell near the end of said pocket, said members being constructed to form a central opening smaller than the bolt which is to be used with said anchor, the sides of said opening forming bearing surfaces for the bolt after the parts of the shell are expanded; an internally threaded expander in said pocket, and wedge-shaped lugs projecting transversely from opposite sides of the expander through the sides of the shell.

4. Abolt anchor comprising a tubular shell split longitudinally, said shell being constructed with a conical pocket flaring toward the inner end of the shell, rigid members integral with the parts of said shell forming a bearing surface across the inner end of the shell near the end of said pocket, said members being constructed to form a central opening smaller than the bolt which is to be used with said anchor, the sides of said opening forming bearing surfaces for the bolt after the parts of the shell are expanded; an internally threaded expander in said pocket and wedge-shaped lugs projecting transversely from opposite sides of the expander through the sides of the shell.

5. A bolt anchor comprising a tubular shell split longitudinally, said shell being constructed with a pocket, and a pair of opposed apertures from said pocket through the sides of the shell at the division lines thereof, said apertures having converging walls, rigid members integral with the parts of said shell formingabearing surface across the inner end of the shell near the end of said pocket, said members being constructed to form a central opening smaller than the bolt which is to be used with said anchor, the sides of said opening forming bearing surfaces for the bolt after the parts of the shell are expanded; an internally threaded expander in said pocket, and a pair of wedge-shaped lugs forming bearing surfaces projecting transversely from opposite sides of the expander into said apertures.

6. The combination with a bolt anchor comprising a tubular shell split longitudinally, said shell being constructed with a conical pocket flaring toward the inner end of the shell, and a pair of opposed substantially diamond-shaped apertures from said pocket through the shell at the division lines thereof, rigid integral members projecting inwardly to form a beveled bearing surface across the inner end of the shell, said members being constructed to form a central opening smaller than the bolt which is to be used with said anchor, the sides of said opening forming bearing surfaces for the bolt after the parts of the shell are expanded; an internally threaded expanding member of conical exterior within said pocket having diamond-shaped lugs forming bearing surfaces entering sa-ic apertures and adapted to pass through the opening in said a portion protruding beyond the outer end Wall When the anchor is expanded, and corof the shell. 10 rugat-ions on the outer periphery of the In Witness whereof, I have hereunto set shell; of a bolt having the threaded portion my hand this 19th day of July 1912.

thereof passing through and fitted into the JOSEPH KENNEDY. threaded portion of the expander and pro- WVitnesses:

jeoting beyond the expander into contact ELIZABETH ALEXANDER,

with the said rigid members and having I. B. MOORE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner 01' Patents, Washington, D. G.

Images