US2666201A - Nail driver - Google Patents

Description

Jan. 19, 1954 H, 1. VAN ORDEN NAIL DRIVER Filed Feb. l, 1952 AFig.3

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Patented Jan. 19, 1954 UNITED STATES PATENT OFFICE 3 Claims.

This invention relates generally to a nail driver, and more particularly to a nail driver for driving nails into steel, concrete, brick or other hard building materials.

The primary object oi this invention is to pro`1 vide an improved nail ldriving and setting device which is especially designed for driving hard steel nails into hard building materials such as concrete, brick and steel.

Another object of this invention is to provide an improved nail driving and setting tool which includes a hardened sleeve slidably mounted within the body of the tool, said hardened sleeve enclosing the nail during the driving operation whereby the worker using the tool is protected from injury through the nail dying out of the driving tool.

Another object of this invention is to provide an improved tool for driving and setting nails into hard building materials, said tool including a hardened sleeve adapted to telescope within the tool during the driving process.

Another object of this invention is to provide an improved tool for driving and setting nails, said tool being oi simple and comp-act construction whereby it may be easily held in one hand of the user while the other hand is free to drive on the end of same with a conventional hammer.

Another object of this invention is to provide 4 an improved nail driving and setting tool which is of simple and compact construction whereby it may be economically manufactured.

Another object of this invention is to provide a tool for driving nails, said tool including a nail engaging shaft which has mounted in its nail engaging end a permanent magnet for retaining a nail on the end of the driving shaft.

Another object of this invention is to provide an improved nail driving shaft which has a centl'al longitudinally extending bore in its nail engaging end, said bore having a permanent magnet disposed therein for retaining a nail on the end of the driving shaft.

A further object of this invention is to provide 1 struction, combination and arrangement of elements and portions as will be hereinafter described in detail in the specication, particularly pointed out in the appended claims, and illustrated in the accompanying drawings which form a material part of this application and in which:

Figure 1 is an elevational view of the nail driving and setting tool, which is the subject of this invention, and showing the general characteristics thereof;

Figure 2 is a longitudinal vertical sectional view through the center of the tool of Figure 1 and showing the internal construction thereof;

Figure 3 is a longitudinal vertical sectional View through the body and sleeve portion of the nail driving and setting tool of Figures 1 and 2, and showing the tool in the process of driving a nail into a hard building surface; and,

Figure i is a bottom end view of the nail driving and setting tool of Figure 1, the nail being omitted.

Similar characters of reference designate similar or identical elements and portions throughout the specication and throughout the different views of the drawings.

Referring now to the drawings in detail, the nail driving and setting tool includes a tubular body portion I0 having an enlarged internal bore I2 throughout the major portion thereof and a reduced internal bore I4 adjacent the lower end thereof. The transition from the enlarged internal bore I2 to the reduced internal bore I4 results in an annular shoulder i5 adjacent the lower end of the body ID.

Mounted within the body IB is a sleeve I8. The sleeve I8 has an external diameter equal to substantially the diameter of the reduced bore I 4 and is mounted in the lower portion of the body Ii) for sliding movement with respect thereto. The upper end of the sleeve I8 is provided with an enlarged, outwardly extending flange portion 2d having a diameter substantially equal to the diameter of the enlarged internal bore l2, The enlarged portion 2D is disposed within the enlarged internal bore l2 and slidably engages the wall thereof.

It is intended that the sleeve I8 be normally disposed within the body IB with the lower end portion thereof projecting downwardly and outwardly of said body. However, the downward movement of the sleeve iii with respect to the body i3 is limited by the engagement of the lower portion of the enlarged flange portion 2li with the annular shoulder I6.

Slidably mounted within the body portion' I0 is a nail driving shaft 22 having an enlarged upper portion 24 of a diameter substantially equal to the diameter of the enlarged internal bore I2. The nail driving shaft 22 is also provided with a reduced lower portion 2S having a diameter substantially equal to the internal diameter of the sleeve I8 and having the extreme lower end thereof siidably mounted within the sleeve I8.

Mounted within the enlarged internal bore I2 of the body IG is a coil spring 23 which is mounted over the reduced portion 26 of the nail driving shaft 22. The upper end of the coil spring 28 engages an annular shoulder Bil on the nail driving shaft 22 formed by the reduction in diameter of the shaft. The lower end of the coil spring 28 is disposed against the upper surface of the enlarged ange portion 2i) of the sleeve I8 and compressibly urges the enlarged i'iange portion 2d into engagement with the annular shoulder iE.

The nail driving shaft 22 is provided with a reduced upper portion 32 which projects outwardly and upwardly from the 'body portion I0. The driving shaft 22 is provided with an annular shoulder 34 formed by the reducing end thereof to form the reduced upper portion 32. Mounted over the reduced upper end 32 and engaging the annular shoulder 3d is a washer 36. rThe washer 36 is retained on the driving shaft 22 and the driving shaft is retained within the body il? by an inturned annular flange 38 integral with the upper end of the body I0.

In order that a nail, referred to in general by the reference numeral 40, may be retained in engagement with the nail driving shaft 22 for the purpose of driving the same into a hard building material, the nail driving shaft 22 is provided with a permanent magnet 42. While any suitable permanent magnet may be utilized, it is preferred that the magnet 42 be of a hypermagnetic ferrous alloy. The magnet 42 is in the form of a cylindrical core and is received within a non-magnetic sleeve 44 having a closed upper end 46. While it has been found that copper is suitable for forming the sleeve 44 and its closed upper end 46, it is not intended to so limit the invention as other suitable non-magnetic metals and alloys may be used. The magnet 42 is retained within the sleeve 44 by a hardened metal core 48 whose lower end is ush with the lower end of the sleeve 44. It has been found that hard nickel is very satisfactory, but other magnetic attractive metals and alloys which are sufficiently hard and do not become permanently magnetized will be satisfactory. The sleeve 44 and its associated magnet 42 and hard metal corev 48 are mounted within a centrally located longitudinally extending bore 50 in the lower end of the driving shaft 22.

It will be noted that the exterior of the body portion lil is knurled at 52 and 54 to form a Suitable hand gripping surface. However, the knurling shown is merely one suggestive design and it is not intended to limit the invention to such an arrangement.

Referring now to Figure 3 in particular, it will be seen that the nail 40 is retained within the lower portion of the sleeve I8 at all times during the nail driving process whereby the danger of the nail flying out from under the tool and striking the user ofthe tool is eliminated. When the nail 48 is lto be driven into a hard building material, which is illustrated in Figure 3 and referred to by the reference numeral 56, the lower end of the sleeve I8 is placed on the surface of the building material 56 in the desired position. The body portion I0 is then urged towards the building material 56 by the pressure of the hand in which it is held and at the same time the upper end 32 of the nail driving shaft 22 is struck by a conventional hammer 58. When the upper end 32 of the nail driving shaft 22 is struck by the hammer 58, the sleeve i8 telescopes within the body portion Ill and the nail driving shaft 22, the body portion I0 and the nail 40 move downwardly until the point of the nail 4Q engages the surface of the hard building material 56. Due to the additional force exerted thereon and the hardness of the pointed end, the nail 40 penetrates the surface of the hardened building material 56. Since the sleeve I8 cannot move, the nail driving shaft 22 and the body portion I0 move downwardly and the sleeve continues to telescope within the body portion i0 and presses theV coil spring 2B. After the nail 40 has been driven into the building material 5d, pressure is released on the body portion I@ and the sleeve I8 is projected downwardly from the lower end of the body portion by the compression of the coil spring 28 to resume the position illustrated in Figure 2.

It will be understood that the nail 4B is a special hardened nail which is designed specilically for driving into hard building materials such as concrete, brick and steel. The nail 40 is a nail which is commercially sold on the market at the present and is no part of this invention other than the fact that it is used with the improved nail driving and setting device, which is the subject of this invention.

The operation of this device will be understood from the foregoing description of the details thereof, taken in connection with the above recited objects and drawings. Further description would appear to be unnecessary.

Minor modification of the device, varying in minor details from the embodiment of the device illustrated and described here, may be resorted to without departure from the spirit and scope of this invention, as defined in the appended claims.

Having described the invention, what is claimed as new is:

l. A nail driving and setting device comprising an elongated tubular body, a sleeve slidably mounted within said body, a driving shaft slidably mounted within said tubular body and said sleeve, means carried by said driving shaft for retaining nails in engagement therewith, said nail retaining means being a magnet disposed within the lower end of driving shaft, said magnet being seated within a sleeve of non-magnetic material mounted within a bore in the driving shaft, said magnet being retained within said sleeve by a hardened core of magnetic attractive material.

2. A nail driving shaft having a hammer engaging end and a nail engaging end, the nail engaging end having a centrally located longitudinal bore therein, a magnetic core disposed within said bore and retained therein by a hardened core of magnetic attractive material, said magnetic core and said hardened core being mounted Within a sleeve of non-magnetic material.

3. A nail driving and setting device comprising an elongated tubular body, a sleeve slidably mounted within said body, a driving shaft slidably mounted within said tubular body and said sleeve, means carried by said driving shaft for retaining nails in engagement therewith, said 5 nail retaining means being a magnet disposed Within the lower end of driving shaft, said magnet being seated within a sleeve of non-magnetic material mounted within a bore in the driving shaft, said magnet being retained within said sleeve by a hardened core of magnetic attractive material, the upper portion of the driving shaft closely engaging the interior of the tubular body, said driving shaft having a reduced lower portion closely engaging the interior of said sleeve, the upper end of the tubular body being inwardly anged to retain said driving shaft therein, the driving shaft having a reduced upper end pro jecting beyond the upper end of the tubular body for engagement by a hammer.

HOWARD J. VAN ORDEN.

References Cited in the le of this patent UNITED STATES PATENTS Number Name Date 608,555 Nazel Aug. 2, 1898 1,052,846 Price Feb. 11, 1913 1,699,519 Brown Jan. 22, 1929 2,475,936 Allen July 12, 1949 2,543,942 Shai Mar. 6, 1951 2,550,775 Clark May l, 1951

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