US3113758A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fulcrum attachment for bladed implements
Assignee: Individual
•
Filing: 1961-07-17
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Granted: 1963-12-10
•
Expires: 1981-07-17
Abstract
No abstract record available.
Inventors
- 👤 Charles M Knowles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:25
CPC Classifications
E; E04; E04D; E04D15/00; E04D15/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A FULCRUM DEVICE FOR USE WITH A SPADE, SAID DEVICE COMPRISING A PAIR OF FULCRUM MEMBERS EACH HAVING A BLADE ENGAGING SURFACE AND A PORTION OVERLYING SAID SURFACE TO DEFINE A GROOVE THEREBETWEEN FOR RECEIVING ONE OF THE OPPOSITE SIDE EDGES OF A SPADE BLADE, SAID MEMBERS EACH HAVING A CURVED FULCRUM SURFACE ADAPTED TO PROJECT FROM ONE FACE OF A BLADE TO WHICH THE DEVICE IS ATTACHED, AND TIE BOLT MEANS EXTENDING BETWEEN SAID FULCRUM MEMBERS AND ADAPTED TO DRAW SAID MEMBERS INTO TIGHT CLAMPING ENGAGEMENT WITH A SPADE BLADE THEREBETWEEN.
Claim 2
Dependent Claim
92 words
A FULCRUM DEVICE FOR USE WITH A SPADE, SAID DEVICE COMPRISING A PAIR OF FULCRUM MEMBERS EACH HAVING A BLADE ENGAGING SURFACE AND A PORTION OVERLYING SAID SURFACE TO DEFINE A GROOVE THEREBETWEEN FOR RECEIVING ONE OF THE OPPOSITE SIDE EDGES OF A SPADE BLADE, SAID MEMBERS EACH HAVING A CURVED FULCRUM SURFACE ADAPTED TO PROJECT FROM ONE FACE OF A BLADE TO WHICH THE DEVICE IS ATTACHED, AND TIE BOLT MEANS EXTENDING BETWEEN SAID FULCRUM MEMBERS AND ADAPTED TO DRAW SAID MEMBERS INTO TIGHT CLAMPING ENGAGEMENT WITH A SPADE BLADE THEREBETWEEN.
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) | 1966-12-09 | 1967-06-10 | 1967-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-09 | 1971-06-10 | 1971-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-09 | 1975-06-10 | 1975-12-10 | $7700.00 | Window Closed / Lapsed |