Reciprocating saw blade with tapered tang stem
First Claim
1. A reciprocating saw blade engageable with a chuck of a reciprocating saw for driving the reciprocating saw blade in a reciprocating motion, the reciprocating saw blade comprising:
- a blade portion having a cutting edge located on a side of the blade and defining a plurality of teeth;
a tang engageable with a chuck of a reciprocating saw and including a first front edge, a first side edge and a first back edge; and
a stem located on an opposite side of the tang relative to the blade portion and having a substantially planar second front edge located on the same side of the blade as the cutting edge, a second side edge, a second back edge opposite the second front edge, a first corner at a junction of the first side edge of the tang and the second back edge of the stem, and a second corner at a junction of the second back edge and the second side edge of the stem, wherein the first corner defines a curvilinear corner region extending throughout an arc within the range of about 85°
to about 65°
between a first point of tangency with the first side edge of the tang and a second point of tangency with the second back edge of the stem, the second back edge of the stem tapers inwardly from the second point of tangency to the second corner of the stem at an angle within the range of about 5°
through about 25°
such that the stem defines a tapered shape that extends between a boundary region of the stem and tang and the second side edge of the stem, the stem has a first width at the boundary region and a second width at the second side edge, and the first width is greater than the second width to resist fatigue at the boundary region.
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Accused Products
Abstract
There is provided a reciprocating saw blade having a tapered tang stem. The tang has a tang portion with at least three outer edges and a stem portion with at least three outer edges. The profiles of the tang portion and particularly the stem portion are such that they facilitate the effective and efficient engagement of the saw blade with any of numerous different keyed or keyless chucks of reciprocating saws. The tang/stem profile also advantageously provides for increased strength for resisting failure and/or fatigue stemming from a cutting force applied to the saw blade during use.
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Citations
15 Claims
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1. A reciprocating saw blade engageable with a chuck of a reciprocating saw for driving the reciprocating saw blade in a reciprocating motion, the reciprocating saw blade comprising:
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a blade portion having a cutting edge located on a side of the blade and defining a plurality of teeth; a tang engageable with a chuck of a reciprocating saw and including a first front edge, a first side edge and a first back edge; and a stem located on an opposite side of the tang relative to the blade portion and having a substantially planar second front edge located on the same side of the blade as the cutting edge, a second side edge, a second back edge opposite the second front edge, a first corner at a junction of the first side edge of the tang and the second back edge of the stem, and a second corner at a junction of the second back edge and the second side edge of the stem, wherein the first corner defines a curvilinear corner region extending throughout an arc within the range of about 85°
to about 65°
between a first point of tangency with the first side edge of the tang and a second point of tangency with the second back edge of the stem, the second back edge of the stem tapers inwardly from the second point of tangency to the second corner of the stem at an angle within the range of about 5°
through about 25°
such that the stem defines a tapered shape that extends between a boundary region of the stem and tang and the second side edge of the stem, the stem has a first width at the boundary region and a second width at the second side edge, and the first width is greater than the second width to resist fatigue at the boundary region. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A reciprocating saw blade engageable with a chuck of a reciprocating saw for driving the reciprocating saw blade in a reciprocating motion, the reciprocating saw blade comprising:
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first means for cuffing a work piece by reciprocating movement thereof; second means including a first front edge, a first side edge and a first back edge for releasably connecting the first means to a chuck of a reciprocating saw; and third means located on an opposite side of the second means relative to the first means for supporting the second means within the chuck of a reciprocating saw, wherein the third means includes a substantially planar second front edge located on the same side of the blade as the cutting edge, a second side edge, a second back edge opposite the second front edge, a first corner at a junction of the first side edge of the second means and the second back edge of the third means, and a second corner at a junction of the second back edge and the second side edge of the third means, wherein the third means includes fourth means for resisting fatigue at a boundary region of the second and third means including a curvilinear corner region extending throughout an arc within the range of about 85°
to about 65°
between a first point of tangency with the first side edge of the second means and a second point of tangency with the second back edge of the third means, the second back edge of the third means tapering inwardly from the second point of tangency to the second corner of the third means at an angle within the range of about 5°
through about 25° and
forming a tapered shape that extends between the boundary region of the second and third means and the second side edge of the third means, and the third means having a first width at the boundary region that is greater than a second width at the second side edge. - View Dependent Claims (12, 13, 14, 15)
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Specification