US3932050A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Joint structure
Assignee: General Electric Co
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Filing: 1975-02-03
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Granted: 1976-01-13
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Expires: 1995-02-03
Abstract
Abstract Joint formed by juxtaposed front and rear members fastened together by a self-drilling, self-tapping screw is provided with a slot in the front surface of the rear member. The slot provides space for receiving the chips produced by the drill end of the screw to avoid buildup of chips which might fall between and separate the joint members.
Inventors
- 👤 Theodor G. Yahraus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:51
CPC Classifications
F; F16; F16B; F16B37/00; F16B37/005; F16B25/00; F16B25/10; F16B25/103; Y; Y10; Y10T; Y10T403/00; Y10T403/16; Y10T403/75
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
144 words
Joint structure comprising, in combination, first and second juxtaposed members having mating adjacent surfaces, and a screw passing through and fastening said juxtaposed 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 screw extending through a hole in said second member formed by said drilling portion of said screw, said mating surface of said second member adjacent said first member being formed with an elongated recess intersecting said hole, said tapping portion of said screw being in threaded engagement with said second member adjacent said recess, whereby chips formed by action of said drilling portion of said screw collect in said elongated recess and said mating adjacent surfaces of said juxtaposed members are in close mating engagement.
Claim 2
Dependent Claim
144 words
Joint structure comprising, in combination, first and second juxtaposed members having mating adjacent surfaces, and a screw passing through and fastening said juxtaposed 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 screw extending through a hole in said second member formed by said drilling portion of said screw, said mating surface of said second member adjacent said first member being formed with an elongated recess intersecting said hole, said tapping portion of said screw being in threaded engagement with said second member adjacent said recess, whereby chips formed by action of said drilling portion of said screw collect in said elongated recess and said mating adjacent surfaces of said juxtaposed members are in close mating engagement.
Claim 3
Dependent Claim
25 words
A device as defined in claim 1, the width of said recess being less than the outer diameter of said tapping portion of said screw.
Claim 4
Dependent Claim
47 words
A device as defined in claim 2, said first member having an aperture aligned with said hole through which said screw extends, the diameter of said aperture being smaller than the diameter of said screw head and larger than the diameter of the remainder of said screw.
Claim 5
Dependent Claim
21 words
A device as defined in claim 1, the edges of said mating surface at the entrance of said recess being beveled.
Claim 6
Dependent Claim
28 words
A device as defined in claim 1, the thickness of said second member at said hole being less than the length of said drilling portion of said screw.
Claim 7
Dependent Claim
24 words
A device as defined in claim 5, the depth of said recess being greater than the thickness of said second member at said hole.
Claim 8
Dependent Claim
23 words
A device as defined in claim 1, said recess extending a substantial distance along said second member on opposite sides of said hole.
Claim 9
Dependent Claim
30 words
A device as defined in claim 1, the length of said tapping portion of said screw being at least equal to the combined depth of said recess and said hole.
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) | 1979-01-12 | 1979-07-14 | 1980-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-12 | 1983-07-14 | 1984-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-12 | 1987-07-14 | 1988-01-13 | $7700.00 | Window Closed / Lapsed |