US3730038A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Saw blade construction
Assignee: Individual
•
Filing: 1970-12-03
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Granted: 1973-05-01
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Expires: 1990-12-03
Abstract
Abstract A saw blade intended to be mounted on an arbor and rotatably driven thereby. The saw blade includes tungsten carbide tipped teeth; however, these tips are brazed into unique pockets or recesses providing structure that substantially precludes the heretofore hazardous possibility of the teeth being broken loose from the blade or separated from the braze. The saw blade further includes several tungsten carbide side cutting teeth spaced in a unique staggered arrangement about the blade at different distances radially from the center thereof to assure against pinching of the blade when sawing green lumber or the like, and cooling slots which obviate cracked and/or warped blades by allowing for expansion and contraction of the steel blade. It is within these cooling slots that the side cutting teeth are fixedly received in a manner which facilitates free access of an abrading wheel for movement therein to and fro along the length of each side cutting tooth for sharpening the teeth.
Inventors
- 👤 J Farb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:11
CPC Classifications
B; B27; B27B; B27B33/00; B27B33/02; B27B33/08; Y; Y10; Y10T; Y10T407/00; Y10T407/14; Y10T407/19; Y10T407/1952; Y10T407/196; Y10T407/26; Y10T83/00; Y10T83/929; Y10T83/9319; Y10T83/9324; Y10T83/9365; Y10T83/9367
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
350 words
An arbor-driven rotatable circular saw for severing a work piece, said saw comprising an annular planer saw blade provided with a concentric aperture for receiving rotatable structure of the arbor, said blade including a plurality of serrated portions spaced about the periphery of said blade and defining gullets therebetween, said serrated portions having leading and trailing edges with respect to the direction of rotation of said blade, a plurality of tungsten carbide tips for engaging the workpiece as said blade rotates and for removing chips therefrom, said blade being provided with a plurality of grooves disposed respectively adjacent said leading edges of said serrated portions, said grooves respectively fixedly receiving said tips so that respective portions of said tips define in part said gullets, said serrated portions respectively including shoulder portions adjacent said portions of said tungsten carbide tips defining in part said gullets, said shoulder portions defining minute faces directed generally radially outwardly from said concentric aperture of said blade for abruptly redirecting said chips towards said gullets and for causing said chips to be broken into smaller particles, said saw blade additionally being provided with several uniformly spaced radial slots extending inwardly from selected several of said gullets and terminating a predetermined distance radially outwardly from said aperture, and several elongated tungsten carbide slugs, each of said slugs includes remote cutting edges and has a thickness dimension which is at least greater than that of said blade but no greater than that of said plurality of tips, said slugs respectively being centered with respect to the thickness of said blade whereby said cutting edges extend substantially equal distances outwardly from the main surfaces of said blade, said slugs being fixedly attached to the portion of said blade defining the trailing edges of said slots, each of said slots being considerably longer than any of said slugs, and said slugs being arranged at staggered distances radially outwardly from said aperture whereby rotation of the saw is effective to cause each slug to describe a broad generatrix of any one slug is partially overlapped by at least another said generatrix.
Claim 2
Dependent Claim
350 words
An arbor-driven rotatable circular saw for severing a work piece, said saw comprising an annular planer saw blade provided with a concentric aperture for receiving rotatable structure of the arbor, said blade including a plurality of serrated portions spaced about the periphery of said blade and defining gullets therebetween, said serrated portions having leading and trailing edges with respect to the direction of rotation of said blade, a plurality of tungsten carbide tips for engaging the workpiece as said blade rotates and for removing chips therefrom, said blade being provided with a plurality of grooves disposed respectively adjacent said leading edges of said serrated portions, said grooves respectively fixedly receiving said tips so that respective portions of said tips define in part said gullets, said serrated portions respectively including shoulder portions adjacent said portions of said tungsten carbide tips defining in part said gullets, said shoulder portions defining minute faces directed generally radially outwardly from said concentric aperture of said blade for abruptly redirecting said chips towards said gullets and for causing said chips to be broken into smaller particles, said saw blade additionally being provided with several uniformly spaced radial slots extending inwardly from selected several of said gullets and terminating a predetermined distance radially outwardly from said aperture, and several elongated tungsten carbide slugs, each of said slugs includes remote cutting edges and has a thickness dimension which is at least greater than that of said blade but no greater than that of said plurality of tips, said slugs respectively being centered with respect to the thickness of said blade whereby said cutting edges extend substantially equal distances outwardly from the main surfaces of said blade, said slugs being fixedly attached to the portion of said blade defining the trailing edges of said slots, each of said slots being considerably longer than any of said slugs, and said slugs being arranged at staggered distances radially outwardly from said aperture whereby rotation of the saw is effective to cause each slug to describe a broad generatrix of any one slug is partially overlapped by at least another said generatrix.
Claim 3
Dependent Claim
193 words
The saw of claim 1 which is further provided with at least one additional radial slot which is considerably shorter than said several slots, said additional slot extending inwardly from the outer periphery of said saw blade and terminating a distance radially closer to said concentric aperture of said saw blade than does said gullets, and which includes at least one additional elongated tungsten carbide slug, said additional slug includes remote cutting edges and has a thickness substantially equal to that of said several slugs said additional slug being centered with respect to the thickness of said blade whereby said cutting edges extend substantially equal distance outwardly from the main surface of said blade, said additional slug being fixedly attached to the portion of said blade defining the trailing edge of said additional slot and beinG arranged radially outwardly from said concentric aperture whereby rotation of the saw is effective to cause said additional slug to describe a broad generatrix having a diameter different from said generatrices of said several slugs and with the generatrix of said additional slug partially extending overlappingly into at least one of said generatrices of said several slugs.
Claim 4
Dependent Claim
337 words
An arbor-driven rotatable circular saw for severing a workpiece, said saw comprising an annular planar saw blade provided with a concentric aperture for receiving rotatable structure of the arbor, said blade including, a plurality of symmetrically arranged circumferentially disposed serrated portions spaced apart and defining scalloplike gullets about the periphery of said blade, said serrated portions having leading and trailing edges with respect to the direction of rotation of said blade, a plurality of tungsten carbide tips for engaging the workpiece as said blade rotates and for removing slivers therefrom, said serrated portions of said blade respectively being provided with grooves adjacent said leading edges thereof said grooves respectively fixedly receiving said tungsten carbide tips said leading edges of said serrated portions of said blade respectively including shoulder portions defining minute faces directed generally radially outwardly from said concentric aperture of said blade for abruptly redirecting said slivers towards said gullets and for causing said slivers to be broken into small chips, said blade additionally being provided with several radial slots extending inwardly from a point adjacent the periphery of said blade and terminating adjacent said concentric aperture, and several elongated tungsten carbide slugs, each of said slugs including remote cutting edges and a thickness dimension which is at least greater than that of said blade but no greater than that of said plurality of tips said slugs respectively being centered with respect to the thickness of said blade whereby said cutting edges extend equal distance outwardly from the main surfaces of said blade, said slugs being fixedly attached to the portion of said blade defining the trailing edge of said slots, each of said slots being considerably longer than any one of said slugs, and said slugs being arranged at staggered distances radially outwardly from said aperture whereby rotation of the saw is effective to cause each slug to describe a broad generatrix which has a diameter different from the other and the generatrix of any one slug is partially overlapped by at least another generatrix.
Claim 5
Dependent Claim
337 words
An arbor-driven rotatable circular saw for severing a workpiece, said saw comprising an annular planar saw blade provided with a concentric aperture for receiving rotatable structure of the arbor, said blade including, a plurality of symmetrically arranged circumferentially disposed serrated portions spaced apart and defining scalloplike gullets about the periphery of said blade, said serrated portions having leading and trailing edges with respect to the direction of rotation of said blade, a plurality of tungsten carbide tips for engaging the workpiece as said blade rotates and for removing slivers therefrom, said serrated portions of said blade respectively being provided with grooves adjacent said leading edges thereof said grooves respectively fixedly receiving said tungsten carbide tips said leading edges of said serrated portions of said blade respectively including shoulder portions defining minute faces directed generally radially outwardly from said concentric aperture of said blade for abruptly redirecting said slivers towards said gullets and for causing said slivers to be broken into small chips, said blade additionally being provided with several radial slots extending inwardly from a point adjacent the periphery of said blade and terminating adjacent said concentric aperture, and several elongated tungsten carbide slugs, each of said slugs including remote cutting edges and a thickness dimension which is at least greater than that of said blade but no greater than that of said plurality of tips said slugs respectively being centered with respect to the thickness of said blade whereby said cutting edges extend equal distance outwardly from the main surfaces of said blade, said slugs being fixedly attached to the portion of said blade defining the trailing edge of said slots, each of said slots being considerably longer than any one of said slugs, and said slugs being arranged at staggered distances radially outwardly from said aperture whereby rotation of the saw is effective to cause each slug to describe a broad generatrix which has a diameter different from the other and the generatrix of any one slug is partially overlapped by at least another generatrix.
Claim 6
Dependent Claim
304 words
An arbor-driven rotatable circular saw for severing a work piece, said saw comprising an annular planer saw blade provided with a concentric aperture for receiving rotatable structure of the arbor, said blade including a plurality of serrated portions spaced about the periphery of said blade and defining gullets therebetween, said serrated portions having leading and trailing edges with respect to the direction of rotation of said blade, a plurality of tungsten carbide tips for engaging the workpiece as said blade rotates and for removing chips therefrom, said blade being provided with a plurality of grooves disposed respectively adjacent said leading edges of said serrated portions, said grooves respectively fixedly receiving said tips so that respective portions of said tips define in part said gullets, said saw blade additionally, being provided with several uniformly spaced radial slots extending inwardly from selected several of said gullets and terminating a predetermined distance radially outwardly from said aperture, and several elongated tungsten carbide slugs, each of said slugs includes remote cutting edges and has a thickness dimension which is at least greater than that of said blade but no greater than that of said plurality of tips, said slugs respectively being centered with respect to the thickness of said blade whereby said cutting edges extend substantially equal distances outwardly from the main surfaceS of said blade, said slugs being fixedly attached to the portion of said blade defining the trailing edges of said slots, each of said slots being considerably longer than any of said slugs, and said slugs being arranged at staggered distances radially outwardly from said apertures whereby rotation of the saw is effective to cause each slug to describe a broad generatrix having a diameter different from the other and the generatrix of any one slug is partially overlapped by at least another said generatrix.
Claim 7
Dependent Claim
304 words
An arbor-driven rotatable circular saw for severing a work piece, said saw comprising an annular planer saw blade provided with a concentric aperture for receiving rotatable structure of the arbor, said blade including a plurality of serrated portions spaced about the periphery of said blade and defining gullets therebetween, said serrated portions having leading and trailing edges with respect to the direction of rotation of said blade, a plurality of tungsten carbide tips for engaging the workpiece as said blade rotates and for removing chips therefrom, said blade being provided with a plurality of grooves disposed respectively adjacent said leading edges of said serrated portions, said grooves respectively fixedly receiving said tips so that respective portions of said tips define in part said gullets, said saw blade additionally, being provided with several uniformly spaced radial slots extending inwardly from selected several of said gullets and terminating a predetermined distance radially outwardly from said aperture, and several elongated tungsten carbide slugs, each of said slugs includes remote cutting edges and has a thickness dimension which is at least greater than that of said blade but no greater than that of said plurality of tips, said slugs respectively being centered with respect to the thickness of said blade whereby said cutting edges extend substantially equal distances outwardly from the main surfaceS of said blade, said slugs being fixedly attached to the portion of said blade defining the trailing edges of said slots, each of said slots being considerably longer than any of said slugs, and said slugs being arranged at staggered distances radially outwardly from said apertures whereby rotation of the saw is effective to cause each slug to describe a broad generatrix having a diameter different from the other and the generatrix of any one slug is partially overlapped by at least another said generatrix.
References Cited (Backward Citations)
US2694423A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-30 | 1976-10-30 | 1977-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-30 | 1980-10-30 | 1981-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-30 | 1984-10-30 | 1985-05-01 | $7700.00 | Window Closed / Lapsed |