Coupling device

Details Coupling device Coupling device

2001-05-21

2002-08-06

Sakran, Victor (Department: 3677)

Buckles, buttons, clasps, etc.

Separable-fastener or required component thereof

Including member having distinct formations and mating...

C024S601200, C024S600900, C024S371000, C024S580110

Reexamination Certificate

active

06427296

ABSTRACT:

BACKGROUND OF THE INVENTION
The present invention relates to a coupling device. More particularly, the present invention relates to a coupling device which has a safety clamp device.
Referring to
FIGS. 1 and 1A
, a conventional coupling device
10
′ has a shackle
11
′, a hook
12
′ connected to the shackle
11
′, a safety clamp plate
20
′ disposed on the shackle
11
′, a spring
40
′ disposed between the shackle
11
′ and the safety clamp plate
20
′, and a rivet
30
′ fastening the safety clamp plate
20
′, the spring
40
′, and the shackle
11
′ together. However, a hole should be formed on the shackle
11
′ in order to receive the rivet
30
′. Therefore, a structure of the shackle
11
′ is weakened.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a coupling device which has a safety clamp device surrounding a shackle without damaging a structure of the shackle.
Another object of the present invention is to provide a coupling device which has a safety clamp device surrounding a shackle stably.
Accordingly, a coupling device comprises a shackle, a hook connected to the shackle, and a safety clamp device surrounding the shackle. The safety clamp device has a central reinforced rib, a flap bar, a slot, a plurality of clamp teeth, and a flexible plate. The flexible plate has a curved portion and a guide recess. The flap bar is inserted in the slot of the safety clamp device.


REFERENCES:
patent: 62194 (1867-02-01), Hayden
patent: 504039 (1893-08-01), Kempshall
patent: 3354522 (1967-11-01), Amon
patent: 5832572 (1998-11-01), Norrby
patent: 5913479 (1999-06-01), Westwood, III
patent: 0128412 (1919-06-01), None
patent: 0136230 (1919-12-01), None

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