Patent US3888152A successfully refreshed from Google Patents.
US3888152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable angle double cutting mitre cut-off saw
Assignee: Individual
•
Filing: 1974-02-06
•
Granted: 1975-06-10
•
Expires: 1994-02-06
Abstract
Abstract A cut-off saw is provided including a base having means defining a workpiece support surface and a workpiece guiding fence adjacent, extending along and projecting outwardly from the workpiece support surface. A pair of driven rotary saw blades are provided and supported in relatively angulated planes disposed generally normal to the workpiece support surface with corresponding marginal portions of the blades closely adjacent each other and the line along which the planes in which the blades are disposed intersect. The structure supporting the blades enables the blades to be moved in the aforementioned relatively angulated planes toward and away from the workpiece supporting surface and those planes to be adjustably angularly displaced relative to each other about coinciding axes at least closely adjacent and generally paralleling the line along which the planes intersect. The rotary saw blades may be selectively and independently moved toward and away from the workpiece support surface as well as simultaneously moved toward and away from the workpiece support surface.
Inventors
- 👤 Glen B Barton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:29
CPC Classifications
B; B23; B23D; B23D45/00; B23D45/14; B23D45/143; B23D45/146; B23D47/00; B23D47/128; B23D47/132; Y; Y10; Y10T; Y10T83/00; Y10T83/768; Y10T83/7684; Y10T83/7722; Y10T83/7755; Y10T83/7763; Y10T83/7768; Y10T83/7772
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
87 words
A cut-off saw including a base provided with means defining a workpiece support surface, a pair of driven saw blades, mounting means supporting said blades in relatively angulated planes generally normal to said surface and with corresponding marginal portions of said blades closely adjacent each other and the line along which said planes intersect, for movement in said planes toward and away from said surface, and for angular displacement of said blades relative to said surface about axes at least closely adjacent and generally paralleling said line.
Claim 2
Dependent Claim
87 words
A cut-off saw including a base provided with means defining a workpiece support surface, a pair of driven saw blades, mounting means supporting said blades in relatively angulated planes generally normal to said surface and with corresponding marginal portions of said blades closely adjacent each other and the line along which said planes intersect, for movement in said planes toward and away from said surface, and for angular displacement of said blades relative to said surface about axes at least closely adjacent and generally paralleling said line.
Claim 3
Dependent Claim
61 words
The combination of claim 1 including a workpiece guiding fence adjacent, extending along and projecting outwardly from said surface, said mounting means for movement of said blades toward and away from said surface including means swingably supporting said blades for angular displacement about axes generally paralleling said surface, disposed substantially normal to said planes and spaced considerably outwardly from said fence.
Claim 4
Dependent Claim
9 words
The combination of claim 1 wherein said axes coincide.
Claim 5
Dependent Claim
12 words
The combination of claim 3 wherein said axes and said line coincide.
Claim 6
Dependent Claim
17 words
The combination of claim 4 wherein said planes extend along the remote sides of said saw blades.
Claim 7
Dependent Claim
62 words
The combination of claim 1 including a workpiece guiding fence adjacent, extending along and projecting outwardly from said surface, adjustment means releasably connected between said mounting means and said support surface operative to inversely angularly displace said saw blades about said axes with said saw blades maintained equally oppositely angulated relative to a center plane normal to said surface and said fence.
Claim 8
Dependent Claim
31 words
The combination of claim 6 wherein either of said blades, upon disconnection of said adjustment means, may be angularly adjusted to a position at least substantially coinciding with said center plane.
Claim 9
Dependent Claim
106 words
The combination of claim 1 wherein said axes at least substantially coincide, said mounting means including a pair of mounting blocks guidingly supported from said base for movement along an arcuate path disposed in a plane generally paralleling said support surface and having said axes as its center of curvature, said mounting blocks each including an arm projecting generally radially inwardly toward said axes, said saw blades being journaled from the inner end portions of said arms, said arms each being pivotally supported at the outer end portions from said blocks for angular displacement about axes generally normal to the planes in which said blades rotate.
Claim 10
Dependent Claim
45 words
The combination of claim 8 including arm displacing means operatively connected to said arms for angularly displacing the latter relative to said blocks, said arm displacing means including remote actuating means selectively operable to independently and simultaneously angularly displace said arms relative to said blocks.
Claim 11
Dependent Claim
23 words
The combination of claim 9 including motor means mounted on the outer end portions of said arms drivingly coupled to said saw blades.
Claim 12
Dependent Claim
57 words
The combination of claim 10 wherein said saw blades are mounted on spindles journaled from the inner ends of said arms, said motor means including rotary output shafts generally paralleling said spindles, corresponding spindles and shafts having aligned driven and drive wheels mounted thereon, and an endless flexible drive member trained about each pair of aligned wheels.
Claim 13
Dependent Claim
88 words
The combination of claim 1 wherein said mounting means include a pair of radius arms having one pair of corresponding ends thereof pivotally anchored to said base for angular displacement about said axes, said radius arms generally paralleling said support surface, said saw blades being journaled from corresponding ends of a pair of support arms having the other ends thereof pivotally supported from the free ends of said radius arms for rotAtion about axes generally paralleling said support surface and extending transversely of said support and radius arms.
Claim 14
Dependent Claim
60 words
The combination of claim 1 including a shiftable actuator for each of said saw blades operable to shift the corresponding saw blade toward and away from said support surface, and means operatively associated with said actuators operative to couple the latter together for simultaneous movement to effect simultaneous shifting of said saw blades toward and away from said support surface.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-09 | 1978-12-09 | 1979-06-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-09 | 1982-12-09 | 1983-06-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-09 | 1986-12-09 | 1987-06-10 | $7700.00 | Window Closed / Lapsed |