US977232A - Expansion-bolt. - Google Patents

Description

G. 0. SMITH.

EXPANSION BOLT.

APPLICATION FILED APR.11, 1910.

977,232. Patented Nov. 29, i910.

; 4 Attorney;

GROVER C. SMITH, OF LA GROSSE, KANSAS.

EXPANSION-BOLT.

Specification of Letters Patent.

Patented Nov. 29, 1910.

Application filed April 11, 1910. Serial No. 554,818.

To all whom at may concern:

Be it known that I, GRovnR C. SMITH, a citizen of the United States, residing at La Crosse, in the county of Rush and State of Kansas, have invented a new and useful Ex pansion-Bolt, of which the following is a specification.

It is the aim of the present invention to provide an improved construction of expansion bolt and the bolt of the present invention is designed primarily for use in securing metallic elements such as the attaching portions of foot scrapers and the like, upon stone or other bases of masonry. More specifically, the invention aims to provide a bolt of this type and for this purpose which will not be liable to become rusted nor to be otherwise affected by the elements.

It is a further aim of the invention, inasmuch as such devices are subjected tocorrosion by the elements and by accumulations of mud, to so construct the nut for the bolt that it will house all portions of the bolt above the plane of the said attaching portions of the scraper.

With the above and other objects in View, the invention consists in the general arrangement and construction of parts shown in the accompanying drawings, in which,-

Figure 1 is a front elevation of a foot scraper secured in place by the expansion bolts embodying the present invention, one of the said bolts being shown in elevation and one being shown in 'vertical section. Fig. 2 is a plan view of one of the attaching portions ofthe scraper, the upper end of one of the expansive-shell sections being illustrated in full lines in the position it assumes with relation to the said attaching portion when the nut of the bolt is tightened and in .dotted lines, the position it is caused to assume when about to be disengaged from the said portion. Fig. 3 is a perspective view of one of the expansive-shell sections.

In the drawings, there is shown an ordinary form of foot scraper, indicated in general .by the reference character A and this scraper includes the usual standards or side members which at their lower ends are bent to afford attaching portions or cars 5. For a purpose which will be presently explaine each of the ears 5 is formed withan opening which is not, however, circular as is usually the case in such devices, but, while circular in general outline, as indicated bythe numeral 6, is formed with diametrically oppositely located lateral rectangular slot extensions 7 The means for securing the foot scraper in place upon its base is, as heretofore stated, in the form of an expansion bolt includingan expansive sleeve, an expanding bolt, and a nut. Of these several elements, the expansive sleeve consists of two sections including each a body 8, a shank 9 and a head 10 and the body of each saidsection, except for certain slight variations in contour to be presently described, is generally semi-cylindrical and the plane side of this body is hollowed out or formed with a groove 11 which, as illustrated in the drawings, is increased in depth from its upper to its lower end in a gradual manner, the true bottom of the groove extending in-a curved line. Th said section is of the same width throughout its body from edge to edge ofthe plane fa'co thereof, but in a plane at right angles to the plane of this face the body is tapered toward its lower end and its convex face is formed, at its lower end, with an outstanding beveled shoulder 12 having a sharp biting edge 13. The shank 9 of the section is of dimensions less than the cross-scctional dimensions of the body and is substantially rectangular, as illustrated in Fig. 3 of the drawings, although that face which corresponds to and is presented in the same direction as the plane face of the body, is grooved in a manner similar to the said body. The head 10 which is located at the upper end of this shank is of about the same dimensions in top plan and also of about the same contour, when so viewed, as is the upper end of the body 8, there being a shoulder 14 formed at the juncture of the lower end of the shank with the body and a shoulder 15 formed atthe uncture of the upper end of the shank with the said head 10.

The expanding bolt includes a'threaded shank 16 and a head 17 which is rectangular in cross section and is gradually expanded or enlarged from its point of juncture with the lower end of the shank, to its lower end. The nut which is to be threaded upon this bolt and tightened to draw the same upwardly between the sections of the expansive sleeve for the purpose of relatively separating or expanding thesev sections has a sleeve portion 18 and a hollow cylindricalbody 19 at the lower end of its heads 10 of the expansive sleeve sections when the said sections are assembled about the bolt.

It will be observed that the openings 6 at their intermediate or mid portions are of such dimensions as to permit of the insertion therethrough-of the heads 10 of the sections of the expansive sleeves, the said sec-- tions being inserted into place one ata time. Subsequent to the disposal of the shanks of the expansive sleeve sections in the rectangular slot extensions of the openings 6, the threaded shank 16 of the expanding bolt is inserted between the said expansive sleeve sections and the nut 18 is partly threaded upon the bolt, the foot scraper A being then disposed upon the base B with the bodies of the expansive sleeve sections and the lower or head end of the expanding bolt depending into the usual bore or socket 20 formed in the said base. The nut 18 is then tightened so as to cause the attaching portion 5 of the foot scraper to bear firmly against the upper face of the said base. It will be observed that the distance between the shoulders 14 and 15 is greater than the thickness of the attaching portion of the foot scraper and that before the nut 18 is tightened upon the bolt, the expansive sleeve sections will drop by gravity with their shoulders 15 resting against the edges of the extensions of the opening in the said attaching portion and that their shoulders 14 will not come into engagement with the under side of the said portion so that when the nut 18 is tightened, the full tension force created by such manipulation of the nut will be to draw upwardly upon the bolt 16 and fully expand the said sleeve sections. In this respect, the sleeve sections of the de vice differ from the corresponding members of similar devices and there is no likelihood of the tension or wedging action of the bolt being lost or impaired.

lVhat is claimed is.

1. In a device of the class described, an

expanding bolt, expansive sleeve sections fitted upon the bolt, each section comprising a body, a shank, and a head; and a nut threaded upon the bolt and having a hollow body portion receiving and housing the said heads of the expansive sleeve sections.-

2. In a. device of the class described, an expanding bolt, expansive sleeve sections fit ted. upon the bolt, each section comprising a shouldered body, a shank, and a head at the upper end of the shank; and a nut threaded upon the shank of the bolt and housing the upper portion of the said shank, the nut having a hollow cylindrical body portion housing the heads of the expansive sleeve sections.

3. In a device of the class described, an expanding bolt, expansive sleeve sections fit.- ted upon the bolt, each section comprising a body; a shank; and a head, the said shank, being located between the body and head and affording shoulders at the points of its juncture with the body and the head, the distance between the shoulders being greater than the thickness of element to be secured, gnld a nut threaded upon the shank of the 4:. In a device of the class described, an expanding bolt, expansive sleeve sections fitted upon the bolt, each section comprising a body, a shank, and a head, the said shank being located between the body and head and affording shoulders at the points of its juncture with the body and the head, the distance between the shoulders being greater than the thickness of an element to besecured, and a nut threaded upon the shank of the bolt, the shoulder at the juncture'of the shank and the head being designed to rest upon the edges of the opening in an element to be secured, through which opening the shanks of the sections engage.

In testimony that I claim the foregoing as my own, I have hereto aflixed my signature in the presence of two Witnesses.

GROVER C. SMITH. lVitnesses HARRY T. FISH, A. P. SMITH.

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