US4121796A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Supporting elements for ducting
Assignee: Individual
•
Filing: 1977-08-30
•
Granted: 1978-10-24
•
Expires: 1997-08-30
Abstract
Abstract A supporting element for use in supporting ducting, particularly air ducting used in air-conditioning installations, comprises a metal strip shaped with transverse bends. The metal strip has a first minor extent of its length formed as curved bearing surfaces spaced around an arc at least approximately conforming to a semi-circle and a second minor extent of its length formed as fastening flanges extending radially outwards of said semi-circle substantially at the diametrically opposed ends of the arc. In use a pair of such elements are arranged in opposed relationship on opposite sides of a ducting having rounded lateral sides with tie-rods connecting the opposed fastening flanges. It is preferred that isolating pads of heat and/or sound insulating material are provided on each said bearing surface.
Inventors
- 👤 George Alfred Forbes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 00:56
CPC Classifications
F; F16; F16L; F16L3/00; F16L3/08; F16L3/10; F16L3/11
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
106 words
A supporting element for use in supporting air ducting and comprising a metal strip having a major central portion of its length formed into an at least approximate semi-circular shape and its two end portions turned back on the inside of the semi-circular central portion in spaced parallel relationship thereto, whereby to provide the supporting element with two spaced hollow limbs, two intermediate portions of the strip between the central portion and the respective end portions each being substantially flat and connected to said central portion and the respective end portion through right-angled bends, whereby to form flat ends on said hollow limbs constituting fastening flanges.
Claim 2
Dependent Claim
106 words
A supporting element for use in supporting air ducting and comprising a metal strip having a major central portion of its length formed into an at least approximate semi-circular shape and its two end portions turned back on the inside of the semi-circular central portion in spaced parallel relationship thereto, whereby to provide the supporting element with two spaced hollow limbs, two intermediate portions of the strip between the central portion and the respective end portions each being substantially flat and connected to said central portion and the respective end portion through right-angled bends, whereby to form flat ends on said hollow limbs constituting fastening flanges.
Claim 3
Dependent Claim
28 words
A support element as claimed in claim 1, wherein the inside surface of each turned back end portion of the supporting element is provided with an isolating pad.
Claim 4
Dependent Claim
19 words
A support element as claimed in claim 2, wherein each pad is made of sound and/or thermal insulating material.
Claim 5
Dependent Claim
83 words
A system for supporting modified rectangular ducting, comprising two supporting elements as claimed in claim 1 are arranged in opposed relationship on opposite sides of the ducting, and clamped together with the ducting between them by means of a pair of tie rods extending parallel to the major dimension of the section of the ducting in spaced relation to the walls thereof, the respective tie rods being tightened up between the respective opposed flat ends of the hollow limbs of the supporting elements.
Claim 6
Dependent Claim
22 words
A system as claimed in claim 4, wherein the upper tie rod is rigidly suspended from a bracket on a building structure.
References Cited (Backward Citations)
US360782A
Cited
US957571A
Cited
US1864651A
Cited
US2099756A
Cited
US2325616A
Cited
US2509503A
Cited
US3244388A
Cited
US3462104A
Cited
US3606218A
Cited
US3944175A
Cited
US4056679A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-10-23 | 1982-04-24 | 1982-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-23 | 1986-04-24 | 1986-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-23 | 1990-04-24 | 1990-10-24 | $7700.00 | Window Closed / Lapsed |