Coupling tube for a screwdriver head

Details Coupling tube for a screwdriver head Coupling tube for a screwdriver head

2006-01-17

2006-01-17

Ashley, Boyer D. (Department: 3722)

Chucks or sockets

Socket type

Radially reciprocating jaws

C279S082000

Reexamination Certificate

active

06986517

ABSTRACT:
The invention relates to a coupling tube for a screwdriver head having a main body, a socket, a spring element and two engaging rings. One end of the main body is formed with an engaging seat for fixing a screwdriver's head therein by use of an engaging element. The engaging element made of steel bar is bent in the shape of a semicircular ring. The main body has an external annular slot for receiving the engaging element. The middle part of the annular slot is opened for communicating with the engaging seat of the main body. Accordingly, the prearranged engaging face of the engaging element can project into the engaging seat for improving the stability when the screwdriver's head is inserted into the engaging seat.

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patent: 2004/0188959 (2004-09-01), Chen

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