Reciprocating tool
OwnerErik P. Henricksoninventor
Life of this patent
Estimating the term…
Abstract
An arcuate action tool attachment is adapted to receive an input and to convert that input into reciprocating output motion along an arcuate path. The tool may be adapted to be combined with an existing linear reciprocating device or a rotary device, or the tool may comprise a single unit including a linear reciprocating device or a rotary device. The tool may be fitted with one or more curved or arc-shaped accessories, such as saw blades or the like, that reciprocate along the arcuate paths that may have substantially the same radius of curvature as the accessory.
Claims18
A reciprocating saw adapted to reciprocally drive at least one saw blade along an arcuate path, said saw comprising:
- a drive input member, said drive input member adapted to receive a drive input;
- an arcuate converting mechanism comprising a longitudinally curved rod attached to said drive input member and movable along an arcuate path in an extension stroke and a retraction stroke responsive to reciprocating movement of said drive input member, and further comprising a saw blade holder attached to said curved rod and movable therewith, said arcuate converting mechanism converting said drive input into arcuate reciprocating movement of said saw blade holder;
- and at least one saw blade having an arcuate working surface, said saw blade mounted to said saw blade holder and reciprocally movable in an arcuate saw blade path via said arcuate converting mechanism, wherein both the extension stroke and the retraction stroke of said curved rod are along substantially the same arcuate path as one another, and wherein a curvature of said arcuate working surface of said at least one saw blade is substantially the same as or substantially parallel to a curvature of the arcuate path of said curved rod, whereby said arcuate working surface of said at least one saw blade traverses substantially the same arcuate path in both the extension stroke and the retraction stroke, said saw blade and curved rod both curving in the same direction, the curvature of said saw blade and said curved rod together extending over an angle of at least 90 degrees.
An attachment for converting a drive input from a powered drive device into an arcuate output path, said attachment comprising:
- a mounting portion for mounting said attachment to the powered drive device;
- a converting mechanism comprising a longitudinally curved rod for converting said drive input from the powered drive device to an arcuate reciprocating motion of a saw blade along the arcuate output path, said curved rod being movable along an arcuate path in an extension stroke and a retraction stroke responsive to reciprocating movement of said drive input;
- and a saw blade holder attached to said curved rod, said saw blade holder being coupled to a saw blade with an arcuate working surface, said saw blade holder being movable along the arcuate output path via said converting mechanism when said attachment is mounted to the drive device and when the drive device is actuated to generate said drive input, wherein both the extension stroke and the retraction stroke of said curved rod are along substantially the same arcuate path as one another, and wherein a curvature of said arcuate working surface of said at least one saw blade is substantially the same as or substantially parallel to a curvature of the arcuate path of said curved rod, whereby the arcuate working surface of the saw blade traverses substantially the same arcuate output path in both the extension stroke and the retraction stroke, said saw blade and curved rod both curving in the same direction, the curvature of said saw blade and said curved rod together extending over an angle of at least 90 degrees.
Dependencies are inferred from the claim text.