US3759623A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stand
Assignee: Individual
•
Filing: 1971-03-10
•
Granted: 1973-09-18
•
Expires: 1991-03-10
Abstract
Abstract A stand comprising several sections connected together, the sections being tubular at least at their ends, a connecting bolt engaging with a clamping action in the ends of adjacent sections, said bolt having at least one naturally resilient clamping member located therearound, which enlarges the cross-section of said bolt, the clamping member being adapted to press against the inner wall of a section, and having several outwardly projecting clamping surfaces.
Inventors
- 👤 K Hesse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:18
CPC Classifications
F; F21; F21V; F21V21/00; F21V21/10; F21V21/12; F16; F16B; F16B7/00; F16B7/04; F16B7/0406; F16B7/0413; F21S; F21S6/00; Y; Y10; Y10T; Y10T403/00; Y10T403/55; Y10T403/559
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
194 words
A connector for axially joining together two tubular sections, comprising: a. a solid cylindrical member adapted to be inserted into the axially aligned ends of the two tubular sections, b. a collar rigidly mounted on the central longitudinal portion of the cylindrical member and completely surrounding the member, said collar extending radially outward from the cylindrical member a uniform distance to limit the depth of insertion of the member into the tubular sections, c. a pair of resilient compression sleeves positioned on and generally surrounding the cylindrical member, each compression sleeve located between the collar and one end of the member, d. each sleeve comprising a rectangular strip of sheet metal bent into the cross-sectional shape of an open circle having a longitudinal slot extending over the length of the sleeve in an axial direction, said slot serving to accommodate the inward compression of the sleeve as the cylindrical member is inserted into the end of a tubular section, and e. a plurality of outwardly projecting frictional engagement surfaces uniformly distributed over the circumference of each sleeve, each surface being longitudinally oriented and extending over a substantial portion of the length of the sleeve.
Claim 2
Dependent Claim
194 words
A connector for axially joining together two tubular sections, comprising: a. a solid cylindrical member adapted to be inserted into the axially aligned ends of the two tubular sections, b. a collar rigidly mounted on the central longitudinal portion of the cylindrical member and completely surrounding the member, said collar extending radially outward from the cylindrical member a uniform distance to limit the depth of insertion of the member into the tubular sections, c. a pair of resilient compression sleeves positioned on and generally surrounding the cylindrical member, each compression sleeve located between the collar and one end of the member, d. each sleeve comprising a rectangular strip of sheet metal bent into the cross-sectional shape of an open circle having a longitudinal slot extending over the length of the sleeve in an axial direction, said slot serving to accommodate the inward compression of the sleeve as the cylindrical member is inserted into the end of a tubular section, and e. a plurality of outwardly projecting frictional engagement surfaces uniformly distributed over the circumference of each sleeve, each surface being longitudinally oriented and extending over a substantial portion of the length of the sleeve.
Claim 3
Dependent Claim
40 words
A connector as recited in claim 5, wherein said tubular sections form a stand, said stand comprising a plurality of tubular sections having adjacent ends between each of two set tubes joined together by one of said connectors inserted therebetween.
Claim 4
Dependent Claim
33 words
A connector as recited in claim 5, wherein said collar has the same cross-section as that of the tubular sections, and wherein the two ends of said cylindrical member are chamfered and tapered.
Claim 5
Dependent Claim
46 words
A connector as recited in claim 1 further comprising an annular groove in each half of the cylindrical member having a width at least equal to the axial height of a sleeve, whereby a sleeve may be accommodated within a corresponding annular groove upon inward compression.
Claim 6
Dependent Claim
17 words
A connector as recited in claim 1 wherein the frictional engagement surfaces have a generally oval outline.
Claim 7
Dependent Claim
17 words
A connector as recited in claim 4, wherein the frictional engagement surfaces have a generally oval outline.
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) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |