Patent US4314489A successfully refreshed from Google Patents.
US4314489A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Screwdrivers
Assignee: Individual
•
Filing: 1979-11-15
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Granted: 1982-02-09
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Expires: 1999-11-15
Abstract
Abstract A screwdriver and screw adapted so that at least one of them has a bore extending into it for receiving a pin held by the other so that in use the pin engages in the bore to hold the screwdriver and screw against lateral movement relative to one another.
Inventors
- 👤 Aldo Arcangeli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:10
CPC Classifications
B; B25; B25B; B25B15/00; B25B15/001; B25B15/004; B25B15/007
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
In combination, a screwdriver, a screw and a pin, in which the screwdriver has a working end adapted to engage a head of the screw, the screwdriver and screw each having bore means for slidably receiving the pin whereby in use the working end of the screwdriver is held against lateral movement across the head of the screw and wherein the pin extends through the screw and moves upwardly into the screwdriver as the screw penetrates a workpiece.
Claim 2
Dependent Claim
78 words
In combination, a screwdriver, a screw and a pin, in which the screwdriver has a working end adapted to engage a head of the screw, the screwdriver and screw each having bore means for slidably receiving the pin whereby in use the working end of the screwdriver is held against lateral movement across the head of the screw and wherein the pin extends through the screw and moves upwardly into the screwdriver as the screw penetrates a workpiece.
References Cited (Backward Citations)
US1069312A
Cited
US2804894A
Cited
US2936010A
Cited
US3289290A
Cited
US3424212A
Cited
US3891017A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-02-08 | 1985-08-10 | 1986-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-02-08 | 1989-08-10 | 1990-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-02-08 | 1993-08-10 | 1994-02-09 | $7700.00 | Window Closed / Lapsed |