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US 6,370,993 B1Granted
Spring loaded self actuating impact driver
OwnerMartin H. Pitstickinventor
Life of this patent
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Abstract
A self-contained impact driver includes an internal hammer, hammer spring and trigger. Pressing the driver against a fastener compresses the spring progressively until the end of the stroke, at which time the hammer is released by the trigger. The trigger both compresses the hammer spring, and releases it. Rotary impact force is applied to the fastener in a selected clockwise or counterclockwise direction.
Claims9
A rotary impact tool for driving fasteners and comprising:
- a handle;
- an outer housing;
- said handle and said outer housing being screwed together;
- a spring-loaded hammer disposed for reciprocating movement within said handle;
- a cammed housing disposed in said outer housing and having a cam slot, said cammed housing movable axially but not rotationally in said outer housing;
- a
- bit housing;
- a pin extending from the bit housing into said cam slot;
- and
- a trigger comprising an elongated stem for urging said spring-loading hammer into a compressed condition when said tool is manually pushed toward a fastener, and for releasing said hammer to drive said cammed housing and impart a rotational impact force to said fastener through said bit housing;
- said hammer remaining within said handle throughout its reciprocating movement.
8 more elements
Dependencies are inferred from the claim text.