US3410325A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically operated portable saw guard lifter
Assignee: Vernco Corp of Tennessee
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Filing: 1966-10-06
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Granted: 1968-11-12
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Expires: 1986-10-06
Abstract
No abstract record available.
Inventors
- 👤 Robert O Winther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:09
CPC Classifications
B; B27; B27G; B27G19/00; B27G19/02; B27G19/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
THE COMBINATION WITH A PORTABLE ROTARY SAW UNIT HAVING A UNIT FRAME; A ROTATING SAW BLADE CARRIED BY THE FRAME; AND A GUARD HAVING A PLANAR WALL SECTION WITH A CUPPED PORTION ABOUT A CIRCUMFERENTIAL LENGTH OF THE PERIPHERY OF THE SAW BLADE, THE GUARD BEING ROTATABLY CARRIED BY SAID FRAME AND NORMALLY COVERING THE UNDERSIDE OF SAID PERIPHERY; OF A STATOR CARRIED AND HELD STATIONARY BY SAID FRAME ALONG A SIDE OF SAID WALL; A KEEPER CARRIED AND HELD STATIONARY BY SAID FRAME ALONG THE OTHER SIDE OF SAID WALL OPPOSITE SAID STATOR; SAID WALL BEING ROTATABLE BETWEEN THE STATOR AND THE KEEPER; SAID WALL BEING OF A CONDUCTIVE AND NONMAGNETIZABLE MATERIAL; AND ELECTRICAL MEANS ASSOCIATED WITH SAID STATOR AND SAID KEEPER SETTING UP A TWO-PHASE MAGNETIC FLUX THEREBETWEEN PRODUCING A TORQUE IN CONJUNCTION WITH SAID WALL FOR ROTATING THE GUARD.
Claim 2
Dependent Claim
142 words
THE COMBINATION WITH A PORTABLE ROTARY SAW UNIT HAVING A UNIT FRAME; A ROTATING SAW BLADE CARRIED BY THE FRAME; AND A GUARD HAVING A PLANAR WALL SECTION WITH A CUPPED PORTION ABOUT A CIRCUMFERENTIAL LENGTH OF THE PERIPHERY OF THE SAW BLADE, THE GUARD BEING ROTATABLY CARRIED BY SAID FRAME AND NORMALLY COVERING THE UNDERSIDE OF SAID PERIPHERY; OF A STATOR CARRIED AND HELD STATIONARY BY SAID FRAME ALONG A SIDE OF SAID WALL; A KEEPER CARRIED AND HELD STATIONARY BY SAID FRAME ALONG THE OTHER SIDE OF SAID WALL OPPOSITE SAID STATOR; SAID WALL BEING ROTATABLE BETWEEN THE STATOR AND THE KEEPER; SAID WALL BEING OF A CONDUCTIVE AND NONMAGNETIZABLE MATERIAL; AND ELECTRICAL MEANS ASSOCIATED WITH SAID STATOR AND SAID KEEPER SETTING UP A TWO-PHASE MAGNETIC FLUX THEREBETWEEN PRODUCING A TORQUE IN CONJUNCTION WITH SAID WALL FOR ROTATING THE GUARD.
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) | 1971-11-12 | 1972-05-13 | 1972-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-12 | 1976-05-13 | 1976-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-12 | 1980-05-13 | 1980-11-12 | $7700.00 | Window Closed / Lapsed |