Bit or tool extension and method of making same
OwnerDavid L. Henderson, Robert E. McFarlin, Jr.inventors
Life of this patent
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Abstract
An apparatus, method and system for extending working tool or bit from a source of rotary power, including a body with a shank, blind bore for the shank of the tool or bit, a tangential bore, a clamping member insertable through one end of the clamping bore, the clamping member having an internal threaded bore, a threaded fastener inserted through the other end of the clamping bore into the threaded bore of the clamping member, an opening into the blind bore into which a wedging section of the clamping member can be drawn tangentially by action of the threaded member.
Claims24
A bit extension for releasably clamping a bit or tool in an extended fashion from a rotational power source comprising:
- a. a body comprising a shank adapted for removable connection to a rotational power source and an opposite end having a blind bore with a radius of curvature extending inwardly of the opposite end;
- b. a generally tangential clamping bore intersecting with the blind bore through a sidewall of the opposite end of the body, the clamping bore including a clamping sleeve section from one side of the body inwardly to an inner section of reduced diameter and a third section opposite the clamping sleeve section from the inner section terminating with an opening on another side of the body;
- c. a clamping sleeve slideably insertable into the clamping sleeve section of the clamping bore;
- the clamping sleeve including an internal threaded through-bore and an eccentric periphery relative to a centerline of the through-bore including a clamping surface that is adapted to follow the general radius of curvature of the blind bore but enter the blind bore at the intersection of the blind bore and the clamping bore;
- d. a threaded fastener insertable through the third section of the clamping bore into mating threadable engagement with the threaded through-bore of the clamping sleeve, the threaded fastener being rotatable by a single tool through a tool interface;
- e. so that the clamping sleeve can be drawn towards the intersection of the clamping bore with the blind bore to provide clamping action to a bit in the blind bore.
A clamping mechanism for releasably clamping a bit or tool in an extended fashion from a rotational power source comprising:
- a. a body having a shank adapted for removable connection to a rotational power source and an opposite end having a blind bore with a radius of curvature extending inwardly of the opposite end;
- b. a generally tangential clamping bore to the blind bore through a sidewall of an upper portion of the body, the clamping bore including a clamping sleeve section from one side of the body inwardly to an inner section of reduced diameter and a third section opposite the clamping sleeve section from the inner section terminating with an opening on another side of the body;
- c. a clamping sleeve slideably insertable into the clamping sleeve section of the clamping bore;
- the clamping sleeve including an internal threaded through-bore and an eccentric periphery relative to a centerline of the through-bore including a clamping surface that is adapted to follow the general radius curvature of the blind bore but enter the blind bore at the intersection of the blind bore and the clamping bore;
- d. a threaded fastener insertable through the third section of the clamping bore into mating threadable engagement with the threaded through-bore of the clamping sleeve, the threaded fastener being rotatable by a single tool through a tool interface;
- e. so that the clamping sleeve can be drawn towards an inner section of the clamping bore with the blind bore and having a clamping surface that is adapted to follow the general radius curvature of the blind bore but enter the blind bore to provide clamping action to a bit in the blind bore.
A clamping mechanism for releasably clamping a bit or tool in operative connection to a rotational power source comprising:
- a. a body having a bit or tool shank receiving bore;
- b. a generally tangential clamping bore to the bit or tool receiving bore, the clamping bore having opposite ends;
- C. a clamping sleeve slidably inserted into one opposite end of the clamping bore, the clamping sleeve including an internal threaded through-bore and a clamping surface that enters an opening in the tool or bit receiving bore;
- d. a threaded fastener insertable through the other opposite end of the clamping bore, and having a threaded end engageable with the internal threaded through-bore of the clamping sleeve and a head end;
- e. a shoulder in the clamping bore towards which the clamping sleeve and head end of the threaded fastener can be moved from opposite directions by rotation of the threaded fastener;
- f. so that the clamping sleeve can be drawn towards the opening in the tool or receiving bit bore to bring the clamping surface into engagement with a tool or bit shank in the tool or bit receiving bore.
Dependencies are inferred from the claim text.