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US 4,974,477 AGranted
Speed wrench
AssigneeCooper Industries, Inc.
InventorAlan D. Anderson
Life of this patent
Estimating the term…
Abstract
The speed wrench includes a plastic handle and a S-curve shaped shaft with a mount to receive tool driving or drilling inserts. The S-curve shaped shaft causes the axis of the tool to intersect the axis of the handle, thereby causing a cone-shaped pattern of rotation. The shaft permits the user to rotate the handle with wrist motion, thereby rotating the tool insert.
Claims7
A hand tool, comprising:
- a handle having a bore therein
- an offset S-curved shaft having one end received within said bore;
- a mounting fixture disposed at the other end of said shaft having means for axially inserting and removing tool inserts therein
- a tool insert mounted to said mounting fixture;
- said mounting fixture including opposed longitudinal slots which receive opposed splines disposed about the exterior of said tool insert;
- said mounting fixture including an inner snap ring disposed about said mounting fixture and an outer snap ring disposed about said inner snap ring and said mounting fixture.
3 more elements
A hand tool for connection and rotation of a tool comprising;
- a handle having opposed ends;
- a shaft rotatably disposed on one of said ends of said handle;
- said shaft having a first straight portion, a second straight portion, and a third portion, said first and second straight portions connected by a first curve and said second and third straight portions connected by a second curve, said straight portions and curves causing said shaft to have a generally S-curve shape between its ends;
- said end of said shaft adjacent said first straight portion being rotatably disposed in said end of said handle and said shaft end adjacent said third straight portion having means for attaching the tool insert;
- the axes of said handle and said first straight portion being collinear and the axes of said third straight portion and the tool being collinear;
- said handle axis intersecting the third straight portion axis at the handle, thereby causing a cone pattern of rotation;
- said attachment means including a snap ring mount for attaching the tool to said shaft;
- and
- said snap ring mount including an inner and an outer snap ring surrounding said end of the tool.
6 more elements
A hand tool for connection and rotation of a tool, comprising:
- a handle having at least one end;
- a shaft rotatably disposed on said end of said handle;
- said shaft having a first straight portion, a second straight portion, and a third straight portion, said first and second straight portions connected by a first curve and said second and third straight portions connected by a second curve, said straight portions and curves causing said shaft to have a generally S-curve shape;
- a first end of said first straight portion being rotatably disposed on said end of said handle and the tool being mounted on a second end of said third straight portion;
- the axes of said handle and said first straight portion being collinear and the axes of said third straight portion and the tool being collinear;
- said handle axis and the axis of said third straight portion intersecting at an angle of between 9 and 21 degrees;
- said third straight portion including a snap ring mount for attaching the tool to said handle;
- and
- said snap ring mount including an inner and an outer snap ring surrounding said end of the tool.
6 more elements
Dependencies are inferred from the claim text.