Method of forming a handle connection for impact tools

Details Method of forming a handle connection for impact tools Method of forming a handle connection for impact tools

1975-01-30

1976-06-08

Hoag, Willard E.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

To produce composite, plural part or multilayered article

264262, 264266, 264267, 264271, 264328, B32B 3100

Patent

active

039623998

ABSTRACT:
A method of forming a handle connection for an impact tool such as a hammer is disclosed which includes the steps of forming the metallic tool head with a handle-receiving eye in which a portion of the eye spaced from the entrance end increases in cross-section toward the exit end, inserting a non-metalic handle having an end portion within the eye dimensioned to form a tight fit with the entrance end of the eye but having a clearance between it and the portion of the eye which increases in cross-section, said end portion in addition having a peripheral indentation or recess in its outer surface, injecting a tough, hard and rigid molding thermoplastic, preferably glass-filled, into the space between the end portion of the handle and the eye, the plastic being in a heated flowable state and being injected under sufficient pressure to compress the end portion of the handle, and permitting the plastic to solidify while maintaining said pressure whereby the plastic forms a tight mechanical interlock with the handle and has intimate wedging engagement with the portion of the eye of increasing cross-section thus effectively locking the parts against looseness and separation.

REFERENCES:
patent: 1172396 (1916-02-01), Schlieder
patent: 2592296 (1952-04-01), Kutik
patent: 2831202 (1958-04-01), Lay
patent: 2955338 (1960-10-01), Gough
patent: 3287485 (1966-11-01), McCord
patent: 3764647 (1973-10-01), McDow

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