GB2382114A

GB2382114A - Hollow pin

Info

Publication number: GB2382114A
Application number: GB0127465A
Authority: GB
Inventors: Pan-Ching Huang
Original assignee: Joker Industrial Co Ltd
Current assignee: Joker Industrial Co Ltd
Priority date: 2001-11-16
Filing date: 2001-11-16
Publication date: 2003-05-21
Anticipated expiration: 2021-11-16
Also published as: GB0127465D0; GB2382114B; DE20119803U1

Abstract

A hollow pin comprises a hollow stem (30) having a C-shaped cross section with a flange (31) at one end of the stem (30). A longitudinal slit (32) extends along the stem (30) and flange (31). Tongues (36, 37) extend from opposite sides of the slit (32) so that tongues (37) on one side of the slit (32) are arranged to overlap tongues (36) on the another side of the slit (32).

Description

RESILIENT HOLLOW PIN BACKGROUND OF THE INVENTION 1. Field of the Invention The invention relates to an improved resilient hollow pin and particularly a resilient hollow pin that is free from tangling with each other and is easy to nail into an anchor bore when in use.

2. Description of the Prior Art A conventional resilient hollow pin such as the one shown in FIG. 1 mainly has a hollow stem 10 formed in a C-shaped cross section, an enlarged retain flange 11 formed at a rear end of the stem and a longitudinal slit 12 running through the side wall of the stem 10 and the retain flange 11. Referring to FIG. 2, when in use, the hollow stem 10 may be nailed into a bore of a smaller size in a wall 20 and be slightly squeezed to form a forced engagement with the wall to fasten a covering board 21 to the wall 20.

The longitudinal slit 12 usually has a width greater than the wall thickness of the stem 10. Thus when piling on the construction site, the stem 10 is easy to tangle with each other through the slit 12 as shown in FIG. 1. It becomes an annoying and time consuming chore to untangle the pins for use when

construction work is proceeding.

Moreover, the pin has a straight front end which is easy to skew during nailing due to lack of guiding tip and might result in poorer construction quality.

SUMMARY OF THE INVENTION In view of aforesaid disadvantages, the primary object of the invention is to provide an improved resilient hollow pin that has an upper jutting tongue and a lower jutting tongue respectively extending toward each other from two sides of the slit in a stagger manner thereby to effectively prevent the pin from entangling with each other. The staggered tongues allow the slit to shrink smoothly without hitting and interfering with each other to form a forced engagement with the anchor bore.

Another object of the invention is to provide an improved resilient hollow pin that has a tapered front end with a pointed slant guiding surface and notches to facilitate shrinking and nailing of the pin when in use.

To attain the foregoing objects, the invention mainly includes a hollow stem formed in a C-shaped cross section with a rear end enlarged to form a retain flange. A longitudinal slit is formed and runs through the stem wall and retain flange. On the stem forms an upper section and a lower section spaced from the retain flange. In each of the upper and lower sections, there is an

upper recess formed on the stem wall adjacent to one side of the slit and a lower jutting tongue located below the upper recess and extending outwards, and an upper jutting tongue formed on the stem wall on the opposite side of the slit and extending outwards and a lower recess below the upper tongue. The stem has a front end with a pointed slant guide surface which has three equally spaced notches to form a cross shape with the slit.

The foregoing, as well as additional objects, features and advantages of the invention will be more readily apparent from the following detailed description, which proceeds with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a conventional resilient hollow pin.

FIG. 2 is a sectional view of a conventional resilient hollow pin in use.

FIG. 3 is a perspective view of the invention.

FIG. 4 is a fragmentary enlarged perspective view of the invention.

FIG. 5 is a schematic cross section of the invention.

FIG. 6 is a sectional view of the invention in use, nailed in a wall.

FIG. 7 is a cross section of the invention in use, nailed and shrunk in a wall.

DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to FIG. 3, the resilient hollow pin of the invention mainly includes a hollow stem 30 formed in a C-shaped cross section. The stem 30 has a rear end enlarged to form a retain flange 31, a longitudinal slit 32 running through the side wall of the stem 30 and the retain flange 31, and a front end which has a pointed slant guiding surface 33. The slant guiding surface 33 has three equally spaced notches 34 formed by punching and form a cross shape with the slit 32.

Referring to FIG. 4, the stem 30 spaced from the retain flange 31 has an upper section and a lower section, the wall of the stem 30 at one side of the slit 32 has an upper recess 35 formed by punching and a lower jutting tongue 36 located below the upper recess 35 and extending outwards. On the stem wall 30 at another side of the slit 32, there is an upper jutting tongue 37 extending outwards and a lower recess 38 below the upper jutting tongue.

Referring to FIG. 6, when the hollow pin of the invention is in use for nailing to a wall, the pointed slant guiding surface 33 adjacent to the notches 34 at the front end of the stem 30 may be squeezed and shrunk under force, and the slant guiding surface 33 offers piercing guide to allow the stem 30 nailed into the wall 20 easily to fasten the covering board 21 to the wall 20.

Referring to FIG. 7, the lower jutting tongue 36 and the upper jutting tongue 27 are extended towards each other in a staggered manner so that the

stem 30 won't be entangled with each other through the slit 32. The staggered jutting tongues further may be freed from hitting each other when the stem 30 is squeezed and shrunk to make construction easier. The nailed stem 30 thus may be firmly nailed into the anchor bore to fasten the covering board 21 to the wall 20.

By means of the construction and embodiment set forth above, the hollow pin has a pointed guiding surface at the front end to facilitate shrinking and nailing into an anchor bore, and can prevent the pin from entangling with each other through the slit.

While the preferred embodiment of the invention has been set forth for the purpose of disclosure, modifications of the disclosed embodiment of the invention as well as other embodiment thereof may occur to those skilled in the art. Accordingly, the appended claims are intended to cover all embodiments which do not depart from the spirit and scope of the invention.

Claims

I claim : 1. An improved resilient hollow pin comprising a hollow stem formed in a C-shaped cross section, the stem having a rear end enlarged to form a retain flange and a longitudinal slit running through the side wall of the stem and the retain flange; wherein the stem spaced from the retain flange includes an upper section and a lower section, the stem wall on one side the slit having an upper recess and a lower jutting tongue located below the upper recess and extending outwards, the stem wall at another side of the slit having an upper jutting tongue extending outwards and a lower recess below the upper jutting tongue, the lower jutting tongue and the upper jutting tongue being corresponding to each other in a stagger manner and being spaced from each other at a small gap.
2. The improved resilient hollow pin of Claim 1, wherein the stem has a front end formed a pointed slant guiding surface, the slant guiding surface having three equally spaced notches forming a cross shape with the slit.

2. The improved resilient hollow pin of claim 1, wherein the stem has a front end formed a pointed slant guiding surface, the slant guiding surface having three equally spaced notches formed a cross shape with the slit.

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Amendments to the claims have been filed as follows 1. An improved resilient hollow pin comprising a hollow stem formed in a C-shaped cross section, the stem having a rear end enlarged to form a retain flange and a longitudinal slit running through a side wall of the stem and the retain flange, wherein the side wall of the stem spaced from the retain flange includes an upper section and a lower section, in each section the side wall on a first side of the slit having an external recess and an internal jutting tongue located inwardly of the external recess and extending into the slit, the side wall on a second side of the slit opposite the first side having an external jutting tongue extending outwards into the slit and an internal recess inwardly of the external jutting tongue, the internal jutting tongue and the external jutting tongue being disposed in a staggered manner and being spaced from each other at a small gap such that when the stem is squeezed the tongues overlap.