US3306135A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill-chip guard
Assignee: Individual
•
Filing: 1963-08-08
•
Granted: 1967-02-28
•
Expires: 1983-08-08
Abstract
No abstract record available.
Inventors
- 👤 Sterling C Denton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:35
CPC Classifications
B; B23; B23Q; B23Q11/00; B23Q11/08; Y; Y10; Y10S; Y10S408/00; Y10S408/71; Y10T; Y10T408/00; Y10T408/50; Y10T408/96
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A CHIP GUARD COMPRISING TWO ELONGATE COPLANAR AND COACTING PROTECTIVE BLADES HAVING IN PART STRAIGHT, CONTACTING INNER EDGES WHEN IN CLOSED POSITION, AND HAVING OPPOSED NOTCHES SO FORMED THAT A WORK PIECE THEREIN MAY BE PERIPHERALLY SURROUNDED BY THE BLADES, PLATES ON THE PROXIMAL PORTIONS OF BOTH FACES OF THE TWO BLADES, BOTH PLATES FIXEDLY SECURED TO ONE AND THE SAME BLADE, THE OTHER BLADE PIVOTALLY CONNECTED TO THE PLATES INTERMEDIATE ITS ENDS, AND A FLAT, BOWED, COMPRESSED SPRING BETWEEN THE BLADES EXERTING PRESSURE TO CLOSE THEM AT THEIR DISTAL ENDS, SAID PROXIMAL PORTIONS OF SAID BLADES BEING SPACED A DISTANCE SUFFICIENT TO ALLOW SAID DISTAL ENDS TO SEPARATE AN AMOUNT AT LEAST EQUAL TO THE MAXIMUM DISTANCE BETWEEN SAID NOTCHES WHEN IN SAID CLOSED POSITION.
Claim 2
Dependent Claim
126 words
A CHIP GUARD COMPRISING TWO ELONGATE COPLANAR AND COACTING PROTECTIVE BLADES HAVING IN PART STRAIGHT, CONTACTING INNER EDGES WHEN IN CLOSED POSITION, AND HAVING OPPOSED NOTCHES SO FORMED THAT A WORK PIECE THEREIN MAY BE PERIPHERALLY SURROUNDED BY THE BLADES, PLATES ON THE PROXIMAL PORTIONS OF BOTH FACES OF THE TWO BLADES, BOTH PLATES FIXEDLY SECURED TO ONE AND THE SAME BLADE, THE OTHER BLADE PIVOTALLY CONNECTED TO THE PLATES INTERMEDIATE ITS ENDS, AND A FLAT, BOWED, COMPRESSED SPRING BETWEEN THE BLADES EXERTING PRESSURE TO CLOSE THEM AT THEIR DISTAL ENDS, SAID PROXIMAL PORTIONS OF SAID BLADES BEING SPACED A DISTANCE SUFFICIENT TO ALLOW SAID DISTAL ENDS TO SEPARATE AN AMOUNT AT LEAST EQUAL TO THE MAXIMUM DISTANCE BETWEEN SAID NOTCHES WHEN IN SAID CLOSED POSITION.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-27 | 1970-08-29 | 1971-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-27 | 1974-08-29 | 1975-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-27 | 1978-08-29 | 1979-02-28 | $7700.00 | Window Closed / Lapsed |