US3172144A - Door stop - Google Patents

Description

March 9, 1965 H. JAMlsoN 3,172,144

nooR sToP Filed Jan. 29. 1962 INVENTOR. Mwy ,JAM/501V Arran/5x United StatesA Patent 0 3,172,144 DOOR STOP Harry Jamison, 162-01 Powell Cove Blvd., Beechhurst, N .Y. Filed Jan. 29, 1962, Ser. No. 169,467 1 Claim. (Cl. 16-86) ting cap is made of resilient material such as polyethylene, v

to act as a shock absorber when struck by the door, and to prevent shattering of the cap.

Still another object of this invention is to provide in a dor stop of the character described, a spline on the rod and a plurality of longitudinal radial grooves in the tubular cap to selectively receive the spline on the rod.

Yet another object of this invention is to provide in a door stop of the character described, a rod having an integral collar or flange at the end of the drive screw to limit penetration of the drive screw into the wall, and to limit movement of the cap onto the rod to keep the outer end of the rod `spaced from the end wall of the cap.

Yet another object of this invention is to provide a door stop of the character described, in which the cap v has radial, inwardly-extending longitudinal ribs, the inner edges of which serve to center the rod within the cap, with the spaces between the ribs forming slots or grooves for the spline on the rod.

A further object of this invention is to provide a door stop of the character described, in which the cap has at its inner, open end, an annular, outwardly-extending flange adapted to contact the wall to which the door stop is attached.

Still a further object of this invention is to provide a strong and durable door stop of the character described, which shall be relatively inexpensive to manufacture, easy to install, in which the cap is replaceable if damaged, and which shall yet be practical and eiiicient to a high degree in use.

Other objects of this invention will in part be obvious and in part hereinafter pointed out.

The invention accordingly consists in the features of construction, combination of elements, and arrangement of parts, which will be exemplified in the construction hereinafter described, and of which the scope of invention will be indicated in the following claim.

In the accompanying drawing, in which is shown an illustrative embodiment of the present invention,

FIG. 1 is a top plan v-iew of a door stop mounted on a wall;

FIG. 2 is an inner end view of the door stop;

FIG. 3 is a cross-sectional View taken on line 3 3 of FIG. 2; and

FIG. 4 is an enlarged cross-sectional view taken on line 4-4 of FIG. 3.

Referring now in detail to the drawing, 10 designates a door stop embodying the invention mounted on a wall 11. Door stop 10 comprises a rod 12 made of metal, preferably case-hardened steel, and a non-metallic, tubular cap 13 demountably mounted on the rod.

The rod 12 comprises a shank 14 of round crosssection having an intermediate, flattened portion 15 passing through the axis of the shank and forming splines 16 extending in opposite directions radially beyond the periphery of said shank.

At the inner'end of the shank is an annular, outwardly extending stop flange 18. Extending beyond the flange 18 is a coaxial drive screw 19 terminating in a point 20 to serve as a penetrating element.

The drive screw may be driven into wall 11 by hammering against the center end 21 of the shank 14, in the manner of driving a nail. The drive screw 19 will penetrate the wall until the flange 18 contacts the wall. The cap 13 may then be slipped onto the shank 14 with its splines 15, 16.

The cap 13 is made of non-rigid material. It is preferably made of synthetic plastic material that has some degree of resiliency, such as polyethylene. Said cap 13 has an end wall 30 at one end, and is open at its opposite end. The cap has an elongated tubular wall 31 formed with a plurality of inwardly-extending, longitudinal, radial ribs 32 of triangular cross-section having inner edges 33 lying in a cylindrical imaginary surface and adapted to contact the outer cylindrical surface of shank 14. Between each pair of adjacent ribs 32 is a radially-extending slot 35. There are an even number of ribs and hence an even number of slots. The slots are hence arranged in opposite pairs to selectively slidably receive splines 16 of the rod. These slots are of substantially equal width throughout. The slots 35 are deeper than the splines 16. Air will not be trapped in the tubular cap, but can flow out through the slots.

At the inner or open end of tubular cap 13 is an outwardly-extending ange 40 having a flat end surface lilla to contact the wall 11. The slots 35, and hence the ribs 32, taper lengthwise to a small degree, decreasing in depth from the open end of the cap to the closed end. The 4inner ends of ribs 32 flare or are inclined radially outwardly toward the open end of the cap, as at 41, and terminate short of the surface 40a to provide a countersink opening 43 to receive the flange 18. The inner edges 33 of ribs 32 are parallel to the axis of the cap, as shown in the drawing.

When the cap is fully mounted on the shank 14, the end 21 of the -shank will be spaced from the end Wall 30 of the cap, as shown in FIG. 3.

If the cap is damaged, it may be removed and replaced easily.

It will thus be seen that there is provided a door stop in which the several objects of the present invention are achieved and which is well adapted to meet the conditions of practical use.

As possible embodiments might be made of the above invention, and as various changes might be made in the embodiment above set forth, it is to be understood that all subject-matter herein set forth or shown in the accompanying drawing, is to be interpreted as illustrative and not in a limiting sense.

I claim:

A door stop comprising a rod having a shank, a wallpenetrating element extending beyond said shank coaxially of the shank, said shank being formed with a radial spline, a tubular cap having an end wall at one end and being open at its opposite end, said cap being mounted on the shank and being formed with internal longitudinal, inwardly-extending ribs having inner edges contacting the outer periphery of the shank, and said ribs being spaced apart angularly forming a plurality of radial grooves to selectively receive said spline, said rod having a wall-engaging stop between the shank and said element to contact the open end of said cap, said ribs being even in number, forming an even number of grooves, said spline being located at an intermediate portion of the shank and comprising a flattened shank por- 3 4 tion forming oppositely extending diametrlc splines to 2,429,731 10/47 Roachell. be received selectively in a pair of opposed grooves. 2,440,170 4/48 Duefrene 16-121 References Cited by the Examiner FOREIlGN PATENTS 593,603 3/59 Ita y. UNJED STATES PATENTS 5 180,915 2/36 switzerland. 918,060 4/09 Kabureck. 1,679,073 7/28 Carmichael 287-128 DONLEY J. STOCKING, Primary Examiner.

2,189,048 2/40 Underhill.

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