US3782056A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Joint structure
Assignee: General Electric Co
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Filing: 1972-04-27
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Granted: 1974-01-01
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Expires: 1992-04-27
Abstract
Abstract Joint formed by superposed members fastened together by a selfdrilling, self-tapping screw is provided with a recess in the surface of the member where the screw exits. The recess provides space for receiving the shavings produced by the drill end of the screw while the portion of the joint member adjacent the recess is threadably engaged by the self-tapping portion of the screw to provide increased holding strength for the screw.
Inventors
- 👤 M Osteen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:26
CPC Classifications
F; F16; F16B; F16B5/00; F16B5/02; F16B25/00; F16B25/001; F16B25/0031; F16B25/10; F16B25/103; Y; Y10; Y10T; Y10T403/00; Y10T403/16
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
166 words
Joint structure comprising, in combination, first and second superposed members, and a screw passing through and fastening said superposed members together, said screw comprising a shank having a head at one end adjacent said first member, a drilling portion at the other end, and a tapping portion between said head and said drilling portion, said first and second members having aligned holes formed therein by said drilling portion, said second member being formed at its surface adjacent said other end of said screw with a recess having a lateral dimension larger than the diameter of said drilling portion of said screw, the tapping portion of said screw intersecting said recess and being at least partially in threaded engagement with at least one side wall of said recess in said second member, the thickness of said second member at said recess being less than the thickness thereof adjacent said recess, said tapping portion of said screw passing through said aligned holes in said first and second members.
Claim 2
Dependent Claim
166 words
Joint structure comprising, in combination, first and second superposed members, and a screw passing through and fastening said superposed members together, said screw comprising a shank having a head at one end adjacent said first member, a drilling portion at the other end, and a tapping portion between said head and said drilling portion, said first and second members having aligned holes formed therein by said drilling portion, said second member being formed at its surface adjacent said other end of said screw with a recess having a lateral dimension larger than the diameter of said drilling portion of said screw, the tapping portion of said screw intersecting said recess and being at least partially in threaded engagement with at least one side wall of said recess in said second member, the thickness of said second member at said recess being less than the thickness thereof adjacent said recess, said tapping portion of said screw passing through said aligned holes in said first and second members.
Claim 3
Dependent Claim
29 words
Joint structure as defined in claim 1, tHe thickness of said second member at said recess being not greater than the length of said drilling portion of said screw.
Claim 4
Dependent Claim
50 words
Joint structure as defined in claim 2, said recess being in the form of a slot extending along the outer surface of said second member and being slightly narrower than the outer diameter of said tapping portion of said screw, said tapping portion threadably engaging opposite sides of said slot.
Claim 5
Dependent Claim
52 words
Joint structure as defined in claim 2, said recess being formed by a step in said second member having a wall portion extending transverse said surface of said second member, said tapping portion of said screw intersecting said recess and being in threaded engagement with said wall portion partially around its circumference.
Claim 6
Dependent Claim
29 words
Joint structure as defined in claim 2, the length of said tapping portion of said screw being equal to at least about the overall thickness of said second member.
Claim 7
Dependent Claim
60 words
Joint structure as defined in claim 2, said recess being a hole extending partially into said second member and receiving said other end of said screw, the diameter of said hole being slightly greater than the diameter of said drilling portion and slightly smaller than the diameter of said tapping portion of said screw for threadably engaging the latter portion.
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) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |