US3754782A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corner device for duct joints
Assignee: Cleats Manufacturing Inc
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Filing: 1971-06-18
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Granted: 1973-08-28
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Expires: 1991-06-18
Abstract
Abstract A corner device for connecting together rectangular ducts in end-to-end relation across a transverse joint comprising angle means adapted to extend longitudinally of the ducts along a corner and across the joint. The angle means includes a pair of flanges adapted to extend along interconnecting walls of the ducts, and each flange has inside end surfaces at opposite ends adapted to be attached to an adjacent duct wall. Corner rib means extends transversely of said angle means outwardly of the flanges away from the duct walls along the joint and includes a rib receiving recess defined therein for receiving an end portion of a joint connector used for interconnecting the adjacent edges of the duct walls.
Inventors
- 👤 Lord E De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:56
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/02; F24F13/0209; F16; F16L; F16L23/00; F16L23/12; F16L23/14
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
216 words
A corner cap for use with a pair of elongated slip joint connectors for interconnecting the ends of a pair of rectangular duct sections in end to end relation, said cap including a corner angle having right angle flanges extending longitudinally along a corner of said duct sections in opposite directions transversely of said slip joint connectors, each of said flanges including an inside surface with a pair of Spaced apart outer end portions adapted to abut and be secured to an adjacent duct wall, said outer end portions defining opposite ends of first recesses formed between said inside surfaces of said flanges and said duct walls and open along outer edges of said flanges for receiving the ends of said slip joint connectors; said cap including a rib extending transversely outward of said flanges and spaced between opposite ends thereof, said rib having a pair of opposite outer end faces at right angles and each aligned with an outer edge of one of said flanges, a pair of second recesses defined in the opposite end faces of said rib for receiving the ends of said slip joint connectors, each second recess intersecting and normal to a first recess for forming a T-shaped slot for receiving the end portion of one of said slip joint connectors.
Claim 2
Dependent Claim
216 words
A corner cap for use with a pair of elongated slip joint connectors for interconnecting the ends of a pair of rectangular duct sections in end to end relation, said cap including a corner angle having right angle flanges extending longitudinally along a corner of said duct sections in opposite directions transversely of said slip joint connectors, each of said flanges including an inside surface with a pair of Spaced apart outer end portions adapted to abut and be secured to an adjacent duct wall, said outer end portions defining opposite ends of first recesses formed between said inside surfaces of said flanges and said duct walls and open along outer edges of said flanges for receiving the ends of said slip joint connectors; said cap including a rib extending transversely outward of said flanges and spaced between opposite ends thereof, said rib having a pair of opposite outer end faces at right angles and each aligned with an outer edge of one of said flanges, a pair of second recesses defined in the opposite end faces of said rib for receiving the ends of said slip joint connectors, each second recess intersecting and normal to a first recess for forming a T-shaped slot for receiving the end portion of one of said slip joint connectors.
Claim 3
Dependent Claim
42 words
The corner cap of claim 1 wherein each of said first recesses includes an inner end face in substantial alignment with a corner of the ducts and a wall thereof for limiting travel of said slip joint connectors transversely of said ducts.
Claim 4
Dependent Claim
245 words
In combination, an assembly for interconnecting the ends of a pair of rectangular duct sections in end to end relation comprising one or more elongated slip joint connectors having side flanges on opposite sides for engaging and connecting end portions of adjacent duct walls of said pair of duct sections, said slip joint connectors including upstanding stiffening ribs extending outwardly of said flanges and normal thereto; a corner cap including a corner angle having right angle flanges extending longitudinally along a corner of said duct sections in opposite directions transversely of said slip joint connectors, at least one of said flanges including an inside surface having a pair of opposite end portions spaced on opposite sides of a slip joint connector adapted to abut and be secured to an adjacent duct wall, said outer end portions defining opposite ends of a first recess formed between said inside surface and said walls of said duct sections and open along an outer edge to receive the ends of said side flanges of said slip joint connector, said cap including a corner rib extending transversely outwardly of said corner angle flanges spaced between opposite ends thereof, said corner rib having a pair of opposite end faces at right angles and aligned with an outer edge of said corner flange, a second recess defined in said corner rib intersecting and normal to said first recess forming a T-shaped slot for receiving the end portion of said slip joint connector.
Claim 5
Dependent Claim
245 words
In combination, an assembly for interconnecting the ends of a pair of rectangular duct sections in end to end relation comprising one or more elongated slip joint connectors having side flanges on opposite sides for engaging and connecting end portions of adjacent duct walls of said pair of duct sections, said slip joint connectors including upstanding stiffening ribs extending outwardly of said flanges and normal thereto; a corner cap including a corner angle having right angle flanges extending longitudinally along a corner of said duct sections in opposite directions transversely of said slip joint connectors, at least one of said flanges including an inside surface having a pair of opposite end portions spaced on opposite sides of a slip joint connector adapted to abut and be secured to an adjacent duct wall, said outer end portions defining opposite ends of a first recess formed between said inside surface and said walls of said duct sections and open along an outer edge to receive the ends of said side flanges of said slip joint connector, said cap including a corner rib extending transversely outwardly of said corner angle flanges spaced between opposite ends thereof, said corner rib having a pair of opposite end faces at right angles and aligned with an outer edge of said corner flange, a second recess defined in said corner rib intersecting and normal to said first recess forming a T-shaped slot for receiving the end portion of said slip joint connector.
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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) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |