US3574378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Strengthening insert and fastener for tubular constructions
Assignee: Individual
•
Filing: 1969-05-26
•
Granted: 1971-04-13
•
Expires: 1989-05-26
Abstract
Abstract A strengthening insert and fastener for a tubular construction including one portion having expandable members engageable in one tube and an attached movable fastener extending outwardly therefrom and engaging a fixed elongated complementary fastener and reinforcing member in another tube.
Inventors
- 👤 James H Heywood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:59
CPC Classifications
F; F16; F16B; F16B7/00; F16B7/04; F16B7/044; F16B7/0446; F16B12/00; F16B12/40; Y; Y10; Y10T; Y10T403/00; Y10T403/46; Y10T403/4602
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
142 words
In a strengthening insert and fastener for tubular constructions including a U-shaped body member having a base portion and spaced arm portions, said base portion having a projecting shoulder of desirable configuration and said arm portions having a pair of oppositely disposed longitudinally extending expansion members secured thereto in spaced relation, said flanges being apertured to receive metal screws for distorting said flanges to increase the effective spacing thereof, and a bolt positioned through the base of said U-shaped body member and extending in a direction opposite to said expansion members, an elongated nut on said bolt, an apertured channel, at least one V-shaped support in said channel, support and elongated nut adapted to be positioned in a first tubular member and said U-shaped body member with the longitudinally extending expansion members being adapted to be positioned in a second tubular member.
Claim 2
Dependent Claim
142 words
In a strengthening insert and fastener for tubular constructions including a U-shaped body member having a base portion and spaced arm portions, said base portion having a projecting shoulder of desirable configuration and said arm portions having a pair of oppositely disposed longitudinally extending expansion members secured thereto in spaced relation, said flanges being apertured to receive metal screws for distorting said flanges to increase the effective spacing thereof, and a bolt positioned through the base of said U-shaped body member and extending in a direction opposite to said expansion members, an elongated nut on said bolt, an apertured channel, at least one V-shaped support in said channel, support and elongated nut adapted to be positioned in a first tubular member and said U-shaped body member with the longitudinally extending expansion members being adapted to be positioned in a second tubular member.
Claim 3
Dependent Claim
34 words
The strengthening insert and fastener set forth in claim 1 and wherein said apertured channel has inturned secondary flanges and said V-shaped support is engaged against said inturned secondary flanges and said eLongated nut.
Claim 4
Dependent Claim
39 words
The strengthening insert and fastener of claim 1 and wherein said apertured channel and said elongated nut are of a greater length than the total width of said base portion and spaced arm portions of said U-shaped body member.
Claim 5
Dependent Claim
53 words
The strengthening insert and fastener of claim 1 and wherein the desirable configuration of said projecting shoulder of said base portion takes the form of a pair of spaced projecting tabs for registry in apertures in said second tubular member on either side of an aperture therein through which said bolt is positioned.
Claim 6
Dependent Claim
119 words
The strengthening insert and fastener of claim 1 and wherein the tubular constructions comprise cross-sectionally square metal tubing and the U-shaped body member, its base portion and spaced arm portions are engaged axially in the end of one of said cross-sectionally square metal tubes with the projecting shoulder extending out of the end thereof and the apertured channel elongated nut and V-shaped support are telescopically engaged in the other of said cross-sectionally square metal tubes with the opening in said elongated nut in which said bolt is engaged registering with an aperture in said other cross sectionally square metal tube and the projecting shoulder of desirable configuration comprising tabs engaging secondary apertures in said other cross-sectionally square metal tube.
References Cited (Backward Citations)
US2004727A
Cited
US2238111A
Cited
US2717061A
Cited
US3051517A
Cited
US3118694A
Cited
US3275356A
Cited
US3353853A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-12 | 1974-10-12 | 1975-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-12 | 1978-10-12 | 1979-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-12 | 1982-10-12 | 1983-04-13 | $7700.00 | Window Closed / Lapsed |