Powered reciprocating saw and clamping mechanism
AssigneeBlack & Decker Inc.
InventorsDaniel Bone, Philip Wren
Life of this patent
Estimating the term…
Abstract
The invention relates to a powered reciprocating saw, in particular, to a pruning saw. To simplify use of the saw, a clamping mechanism is provided which holds an object in position while it is sawed. The clamping mechanism includes a clamping arm that is mounted at the front portion of the saw housing near the blade by a one way rotary clutch such that the arm can freely rotate in only one direction. During use, the saw vibrates due to its reciprocating parts. Since the clamping arm has a center of mass spaced apart from the axis of rotation provided by the one way rotary clutch, a progressive rotational movement of the clamping arm results which thereby automatically closes to clamp the object to be cut.
Claims12
A hand-held powered saw comprising:
- a housing;
- a reciprocating cutting blade extending from said housing;
- a clamping arm;
- a first support member attached to the housing for cooperating with said clamping arm to hold an object to be cut;
- and
- a one way rotary clutch rotatably mounting the clamping arm to the first support member for permitting the clamping arm to rotate in only one direction;
- wherein the clamping arm has a center of mass spaced apart from the axis of rotation of said one way rotary clutch so that the vibration of the housing as a whole generated by reciprocation of the cutting blade induces a progressive rotation of the clamping arm in said one direction when the saw is in use.
A hand-held powered saw comprising:
- a housing;
- a reciprocating cutting blade extending from said housing;
- a clamping arm rotatably mounted to the housing;
- and
- a one way rotary clutch rotatably mounting the clamping arm to the housing for permitting the clamping arm to rotate in only one direction;
- wherein the clamping arm has a center of mass spaced apart from the axis of rotation of said one way rotary clutch so that the vibration of the housing as a whole generated by reciprocation of the cutting blade induces a progressive rotation of the clamping arm when the saw is in use.
Dependencies are inferred from the claim text.