US4083641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
T-Shaped structural joint
Assignee: YKK Corp
•
Filing: 1977-04-07
•
Granted: 1978-04-11
•
Expires: 1997-04-07
Abstract
Abstract A T-shaped structural joint includes a tubular member connected endwise to a plate member by a screw and a connector press-fitted in a hollow open end of the tubular member, the connector having on its periphery a knurled surface which is held in tight frictional engagement with the interior surface of the open end. The connector has a radially extending slot that allows the connector to contract when forcibly inserted into the tubular member, the connector having a tendency to expand or spring back under its own resiliency upon insertion such that the connector forcibly acts against the interior surface of the tubular member. The connector includes a notched and tapered sleeve that facilitates initial insertion of the connector.
Inventors
- 👤 Yukio Sado
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:11
CPC Classifications
E; E04; E04F; E04F11/00; E04F11/18; E04F11/181; F; F16; F16B; F16B9/00; F16B9/05; F16B9/054; F16B9/056; F16B2200/00; F16B2200/40; F16B2200/403
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
140 words
A T-shaped structural joint, comprising: (a) a first member having a hollow open end; (b) a second member extending transversely to and having a surface disposed flatwise against said open end, said second member having a through hole; (c) a connector disposed coaxially in said first member at its open end with a press fit, said connector having a body with an end face held flatwise against said surface of said second member, said body having on its outer periphery means defining a roughened surface held in frictional engagement with the interior surface of said hollow open end, there being a bore and a slot in said body, said bore being located substantially centrally of said body, and said slot communicating between said bore and said outer periphery; and (d) a screw passing through said hole threadedly into said connector.
Claim 2
Dependent Claim
140 words
A T-shaped structural joint, comprising: (a) a first member having a hollow open end; (b) a second member extending transversely to and having a surface disposed flatwise against said open end, said second member having a through hole; (c) a connector disposed coaxially in said first member at its open end with a press fit, said connector having a body with an end face held flatwise against said surface of said second member, said body having on its outer periphery means defining a roughened surface held in frictional engagement with the interior surface of said hollow open end, there being a bore and a slot in said body, said bore being located substantially centrally of said body, and said slot communicating between said bore and said outer periphery; and (d) a screw passing through said hole threadedly into said connector.
Claim 3
Dependent Claim
21 words
A structural joint according to claim 1, said first member comprising a hollow cylinder and said connector body comprising a cylinder.
Claim 4
Dependent Claim
51 words
A structural joint according to claim 1, said connector including a body having a sleeve at an end thereof opposite to said end face, said sleeve being tapered toward its distal end and having a pair of opposed notches, and a second slot in said sleeve communicating with said first-mentioned slot.
Claim 5
Dependent Claim
41 words
A structural joint according to claim 1, said surface means comprising a knurled surface having a plurality of straight ridges extending lengthwise of said connector, said knurled surface being larger in diameter than said interior surface of said hollow open end.
Claim 6
Dependent Claim
16 words
A structural joint according to claim 1, said second member extending perpendicularly to said first member.
Claim 7
Dependent Claim
13 words
A structural joint according to claim 1, said screw extending into said bore.
Claim 8
Dependent Claim
17 words
A structural joint according to claim 1, said slot in its free state having a vee cross-section.
Claim 9
Dependent Claim
50 words
A structural joint according to claim 1, said body having a second bore communicating with said outer periphery, and a second screw passing through said second member threadedly into said second bore, said second screw having a portion held in self-tapping engagement with said interior surface of said first member.
Claim 10
Dependent Claim
14 words
A structural joint according to claim 8, said second bore communicating with said slot.
Claim 11
Dependent Claim
18 words
A structural joint according to claim 8, said second bore being angularly spaced substantially 90° from said slot.
References Cited (Backward Citations)
US1460928A
Cited
GB683386A
Cited
US2566287A
Cited
US3202245A
Cited
US3427056A
Cited
US3519292A
Cited
US3601501A
Cited
CH567174A5
Cited
US3962774A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-04-10 | 1981-10-10 | 1982-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-10 | 1985-10-10 | 1986-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-10 | 1989-10-10 | 1990-04-11 | $7700.00 | Window Closed / Lapsed |