US3927950A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Half-lapped tube joint
Assignee: Individual
•
Filing: 1975-01-24
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Granted: 1975-12-23
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Expires: 1995-01-24
Abstract
Abstract The joinder of crossed members by the formation in at least one member of a notch established by the piercing and shearing of one flat wall and the bending of adjacent walls to a bottom plane displaced from the remaining flat wall, a second member being received in said notch, and advantageously employed by the formation of like notches in both crossed members and which are complementary, the crossed members thereby retaining their structural continuity without the production of scrap, and adapted to be integrally welded one to the other.
Inventors
- 👤 John R Herrmann
- 👤 Robert L Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:53
CPC Classifications
F; F16; F16B; F16B7/00; A; A47; A47B; A47B2230/00; A47B2230/0074; A47B2230/0085; F16B2200/00; F16B2200/67; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49945; Y10T403/00; Y10T403/49; Y10T403/4966; Y10T403/70; Y10T403/7001
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
101 words
A notch in an elongated hollow member having a planar top wall and spaced planar and parallel side walls depending from the top wall, portions of the top wall and spaced side walls being displaced along transverse and vertically disposed shear lines respectively, the center of the top wall being folded downwardly, the displaced side wall portions being folded inwardly to a plane disposed beneath and parallel to the remaining top wall, and the displaced top wall portion being disposed in the form of a fold depending from the notch bottom established by the two displaced and juxtaposed side wall portions.
Claim 2
Dependent Claim
101 words
A notch in an elongated hollow member having a planar top wall and spaced planar and parallel side walls depending from the top wall, portions of the top wall and spaced side walls being displaced along transverse and vertically disposed shear lines respectively, the center of the top wall being folded downwardly, the displaced side wall portions being folded inwardly to a plane disposed beneath and parallel to the remaining top wall, and the displaced top wall portion being disposed in the form of a fold depending from the notch bottom established by the two displaced and juxtaposed side wall portions.
Claim 3
Dependent Claim
30 words
The notch in an elongated member as set forth in claim 1, wherein the shear lines are parallel transverse lines continuing vertically into the shear lines of the side walls.
Claim 4
Dependent Claim
43 words
The notch in an elongated member as set forth in claim 1, wherein said member is tubular with a bottom wall spaced from the top wall, and wherein the displaced portion of the top wall depends into stopped engagement with the bottom wall.
Claim 5
Dependent Claim
62 words
The notch in an elongated member as set forth in claim 1, wherein the said member is tubular with a bottom wall spaced from the top wall, wherein the shear lines are parallel transverse lines continuing vertically into the shear lines of the side walls, and wherein the displaced portion of the top wall depends into stopped engagement with the bottom wall.
Claim 6
Dependent Claim
189 words
A pair of complementary hollow crossed elongated members each notched to receive a portion of the other and each having a planar top wall and spaced planar and parallel side walls depending from the top wall, portions of the top wall and spaced side walls being severed and displaced along transverse and vertically disposed shear lines respectively, the remaining, undisplaced, adjaceNt portions of said walls forming opposed notch edge, the center of the top wall being folded downwardly, the displaced side wall portions being folded inwardly to a plane disposed beneath and parallel to the remaining top wall, and the displaced top wall portion being disposed in the form of a fold depending from the notch bottom established by the two displaced and juxtaposed side wall portions, the notched portion of each member being received in the notched portion of the other member crossed therewith respectively, the axial spacing between the opposed edges of each notch being less than the width of the other member inserted therein, whereby when the members are joined the edges of each notch engage the other member inserted therein, with a tight, force-fitting grip.
Claim 7
Dependent Claim
189 words
A pair of complementary hollow crossed elongated members each notched to receive a portion of the other and each having a planar top wall and spaced planar and parallel side walls depending from the top wall, portions of the top wall and spaced side walls being severed and displaced along transverse and vertically disposed shear lines respectively, the remaining, undisplaced, adjaceNt portions of said walls forming opposed notch edge, the center of the top wall being folded downwardly, the displaced side wall portions being folded inwardly to a plane disposed beneath and parallel to the remaining top wall, and the displaced top wall portion being disposed in the form of a fold depending from the notch bottom established by the two displaced and juxtaposed side wall portions, the notched portion of each member being received in the notched portion of the other member crossed therewith respectively, the axial spacing between the opposed edges of each notch being less than the width of the other member inserted therein, whereby when the members are joined the edges of each notch engage the other member inserted therein, with a tight, force-fitting grip.
Claim 8
Dependent Claim
39 words
The complementary crossed members as set forth in claim 1, wherein the displacement of the said notch bottom from the top wall of one member is equal to the remaining depth of the notched portion of the other member.
Claim 9
Dependent Claim
69 words
The complementary crossed members as set forth in claim 1, wherein the elongated members are tubular with spaced top and bottom walls, and wherein the displacement of the said notch bottom from the top wall of one member is equal to the remaining depth of the notched portion of the other member, the top wall of one member being co-planar with the bottom wall of the other member respectively.
Claim 10
Dependent Claim
39 words
The complementary crossed members as set forth in claim 1, wherein the displacement of the said notch bottom from the top wall of one member is equal to the remaining depth of the notched portion of the other member.
Claim 11
Dependent Claim
69 words
The complementary crossed members as set forth in claim 1, wherein the elongated members are tubular with spaced top and bottom walls, and wherein the displacement of the said notch bottom from the top wall of one member is equal to the remaining depth of the notched portion of the other member, the top wall of one member being co-planar with the bottom wall of the other member respectively.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-22 | 1979-06-23 | 1979-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-22 | 1983-06-23 | 1983-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-22 | 1987-06-23 | 1987-12-23 | $7700.00 | Window Closed / Lapsed |