Anti-shock structure of a hammer handle

Details Anti-shock structure of a hammer handle Anti-shock structure of a hammer handle

1999-12-14

2001-05-01

Eley, Timothy V. (Department: 3723)

Tools

Hammer

Having shock absorbing means

C081S027000, C081S490000

Reexamination Certificate

active

06223627

ABSTRACT:

BACKGROUND OF INVENTION
1. Field of the Invention
The present invention relates to an anti-shock structure of a hammer handle. Especially, it relates to a hammer handle having a special elastic element inside so that an excellent holding effect and anti-shock function can be achieved.
2. Description of the Prior Art
As shown in
FIG. 1
, it is a conventional hammer structure. It includes a hammer head
10
and wooden handle
20
connected with. Because the wooden handle
20
is made from the trunk of a tree. It does not contain any anti-shock structure. During the knocking procedure, it is very possible to cause the holding is hard and to cause the user's hand numb due to the reactive force (or shock).
Another convention hammer structure was invented. Referring to
FIGS. 2
to
4
, a U-shaped air bag
30
is disposed between the main rod
10
and the handle sleeve
20
. There is some air
31
sealed inside the air bag
30
. Therefore, the air bag
30
between the main rod
10
and the handle sleeve
20
will absorb the reactive force during knocking. Thus, an anti-shock effect is achieved.
However, before knocking something, the user will swing he hammer up a little as a preparation step. Because this winging movement and according to the lever's law, a reactive force will apply on the connecting portion
41
between the thumb and the index finger, the ring finger
42
and the little finger
43
. Thus, many recesses
50
are occurred corresponding to the positions of the connecting portion
41
, the ring finger
42
, and the little finger
43
. Furthermore, it makes a little gap
60
is created on the holding portion of the hand
40
. This will influence the holding effect between the hand
40
and the handle
20
. And, there is a centrifugal force during the swinging movement before knocking. It will cause the risk of the hand
40
sliding out. If increasing the handle's thickness over he air bag
30
, the absorbing and shrinking speed becomes slow and further influences its shock absorbing amount. Therefore, it is a dilemma about the anti-shock design.
SUMMARY OF THE INVENTION
The main object is to provide an anti-shock structure of a hammer handle comprising a main rod, a handle sleeve, an elastic element, and a plug; a longitudinal storing slot being disposed inside said handle sleeve, the elastic element being disposed in the longitudinal storing slot, one end of the elastic element having a U-shaped portion, the elastic element's cross-sectional width being less than the longitudinal storing slot's cross-sectional width. So, during the swinging movement before knocking, a U-shaped portion of the elastic element will resist the reactive force so as to ensure the excellent holding effect. After the knocking, an opened portion of the elastic element will absorb the shock. Thus, excellent holding effect and the anti-shock function are achieved.


REFERENCES:
patent: 4738166 (1988-04-01), Yamaguchi
patent: 5490437 (1996-02-01), Hebert et al.
patent: 5926911 (1999-07-01), Chen

Affiliated with

Also associated with

Rating

Anti-shock structure of a hammer handle does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Anti-shock structure of a hammer handle, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Anti-shock structure of a hammer handle will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2523268