US3200422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of forming a screw with a slot in the shank
Assignee: Long-Lok Corp
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Filing: 1962-07-09
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Granted: 1965-08-17
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Expires: 1982-07-09
Abstract
No abstract record available.
Inventors
- 👤 L D Willmon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:20
CPC Classifications
F; F16; F16B; F16B39/00; F16B39/22; F16B39/28; F16B39/34; B; B21; B21K; B21K1/00; B21K1/44; B21K1/54
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
179 words
A METHOD OF ACCURATELY FABRICATING A SCREW OF A GIVEN DIAMETER WITH A LONGITUDINAL PERIPHERAL GROOVE IN A SHANK PORTION OF THE SCREW TO SEAT AN INSERT, CHARACTERIZED BY THE STEP OF: FORMING A BLANK SCREW WITH A SHANK PORTION THAT IS OVERSIZED WITH RESPECT TO SAID DIAMETER; CONFINING SAID SHANK PORTION OF THE BLANK SCREW IN A CAVITY OF THE SAME CONFIGURATION AS THE SHANK PORTION OF THE BLANK SCREW BUT OF SLIGHTLY LARGER DIAMETER TO COMPENSATE FOR THE CROSS SECTIONAL AREA OF THE DESIRED GROOVE; DRIVING INTO THE MATERIAL OF THE CONFINED SHANK PORTION A FORMING MEMBER, THE TRANSVERSE CROSS SECTION OF WHICH IS THE SAME AS THE LONGITUDINAL CROSS SECTION OF THE GROOVE, TO FORM THE GROOVE IN THE SHANK PORTION BY DISPLACEMENT OF THE MATERIAL WITH THE DISPLACEMENT CONFINED CIRCUMFERENTIALLY BY THE SURROUNDING WALL OF THE CAVITY AND WITH CONSEQUENT INCREASE IN THE DIAMETER OF THE SHANK PORTION; AND THEN REMOVING THE EXCESS MATERIAL OF THE SHANK PORTION AND AT THE SAME TIME FORMING A SCREW THREAD ON THE SHANK PORTION BY A GRINDING OPERATION.
Claim 2
Independent Claim
179 words
A METHOD OF ACCURATELY FABRICATING A SCREW OF A GIVEN DIAMETER WITH A LONGITUDINAL PERIPHERAL GROOVE IN A SHANK PORTION OF THE SCREW TO SEAT AN INSERT, CHARACTERIZED BY THE STEP OF: FORMING A BLANK SCREW WITH A SHANK PORTION THAT IS OVERSIZED WITH RESPECT TO SAID DIAMETER; CONFINING SAID SHANK PORTION OF THE BLANK SCREW IN A CAVITY OF THE SAME CONFIGURATION AS THE SHANK PORTION OF THE BLANK SCREW BUT OF SLIGHTLY LARGER DIAMETER TO COMPENSATE FOR THE CROSS SECTIONAL AREA OF THE DESIRED GROOVE; DRIVING INTO THE MATERIAL OF THE CONFINED SHANK PORTION A FORMING MEMBER, THE TRANSVERSE CROSS SECTION OF WHICH IS THE SAME AS THE LONGITUDINAL CROSS SECTION OF THE GROOVE, TO FORM THE GROOVE IN THE SHANK PORTION BY DISPLACEMENT OF THE MATERIAL WITH THE DISPLACEMENT CONFINED CIRCUMFERENTIALLY BY THE SURROUNDING WALL OF THE CAVITY AND WITH CONSEQUENT INCREASE IN THE DIAMETER OF THE SHANK PORTION; AND THEN REMOVING THE EXCESS MATERIAL OF THE SHANK PORTION AND AT THE SAME TIME FORMING A SCREW THREAD ON THE SHANK PORTION BY A GRINDING OPERATION.
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) | 1968-08-16 | 1969-02-15 | 1969-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-16 | 1973-02-15 | 1973-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-16 | 1977-02-15 | 1977-08-17 | $7700.00 | Window Closed / Lapsed |