Tool driving or impacting – Impacting devices – Hammer head driven by spring
Patent
1993-10-29
1995-09-12
Rada, Rinaldi I.
Tool driving or impacting
Impacting devices
Hammer head driven by spring
173205, 173120, B25D 1110
Patent
active
054490448
ABSTRACT:
A miniature impact tool in which a cam is utilized for moving a striker backward by converting rotary motion of a drive shaft to a linear motion. The striker is in contact with a spring/plunger assembly and is moved away from a surface to be struck during a portion of the rotation cycle of the cam. On further rotation the cam surface is cut away and spring action drives the striker forward, causing impact of a cutting tool (chisel) against a workpiece. Excessive wear of the drive shaft is eliminated using a specific design of a shelf upon which the striker moves, as well as a sleeve bearing around the drive shaft in the area of possible wear. The striker is provided with a guide structure (such as a recess) into which the nose of the plunger fits in order to provide controlled guidance of the striker in its longitudinal movement. The output shaft of the tool accepts removable collets of varying shapes in order to accommodate chisel tools having different shank geometries and sizes.
REFERENCES:
patent: 4030556 (1977-02-01), Phillips
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