Replaceable head for an extension tool

Details Replaceable head for an extension tool Replaceable head for an extension tool

2001-12-28

2002-09-24

Cherry, Johnny D. (Department: 3652)

Handling: hand and hoist-line implements

Hand bars and hand barrows

Ball retriever

C294S104000

Reexamination Certificate

active

06454330

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a replaceable head for an extension tool, and more particularly to a replaceable head for an extension tool that can be changed rapidly and easily to increase the versatility of the extension tool.
2. Description of Related Art
With reference to
FIGS. 5 and 6
, a conventional extension tool such as a litter picker is composed of an actuating set (
60
) and a clamp head (
70
).
The actuating set (
60
) consists of a tube (
62
) and a handle (
64
) attached to one end of the tube (
62
), wherein a trigger (
66
) is mounted on the handle (
64
).
The clamp head (
70
) is secured on the other end of the tube (
62
) and is composed of an upper jaw (
72
) and a lower jaw (
74
). The upper jaw (
72
) is firmly attached to the tube (
62
), and the lower jaw (
74
) is pivotally attached to the upper jaw (
72
).
A control wire (
68
) passes through the tube (
62
), and one end is attached to the trigger (
66
). The control wire (
68
) curves around the upper periphery of the lower jaw (
74
), and the other end of the control wire (
68
) is attached to the lower jaw (
74
). Therefore, when the litter picker operates, the trigger (
66
) is squeezed to pull the wire (
68
) whereby the lower jaw (
74
) is pivotally activated to close with the upper jaw (
72
) to pick up objects such as litter.
However, the conventional extension tool has a drawback. Because the control wire (
68
) is securely attached to the actuating set (
60
) and the clamp head (
70
) to activate the lower jaw (
74
), the clamp head (
70
) cannot be separated from the actuating set (
60
). Therefore, the extension tool is limited to a single application.
To allow the extension tool to have multiple capabilities, the present invention has arisen to mitigate and/or obviate the disadvantage of the conventional extension tool.
SUMMARY OF THE INVENTION
The main objective of the present invention is to provide a replaceable head for an extension tool, which can be changed easily and rapidly.
Further benefits and advantages of the present invention will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings.


REFERENCES:
patent: 304669 (1884-09-01), Robie
patent: 1024991 (1912-04-01), Hunt
patent: 3265429 (1966-08-01), Shatt
patent: 3844599 (1974-10-01), Burian
patent: 4483562 (1984-11-01), Schoolman
patent: 5192104 (1993-03-01), Lin
patent: 5590923 (1997-01-01), Berger et al.

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