US3791282A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Weather cap for exhaust pipe
Assignee: Deere and Co
•
Filing: 1972-11-10
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Granted: 1974-02-12
•
Expires: 1992-11-10
Abstract
Abstract A weather cap for an upstanding exhaust pipe includes a cover flap which, in the absence of gas pressure within the exhaust pipe, covers the exhaust port and, in the presence of gas pressure, pivots upwardly to permit escapage of the gas. The cover flap is pivotally secured to the exhaust pipe by a flexible band of variable diameter surrounding the outer wall of the exhaust pipe and held in pressure engagement therewith by a worm carried on one end of the band which worm meshes with aligned slots on the opposite end of the band. Since the diameter of the band is variable, the weather cap has universal application and one weather cap is adaptable to various size exhaust pipes. A counterweight carried on the underside of the cover flap aids in the closing of the cover flap when gas pressure ceases.
Inventors
- 👤 Elhose H Mc
- 👤 W Salow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:54
CPC Classifications
F; F23; F23J; F23J13/00; F23J13/08
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
235 words
An apparatus for covering the outlet port of an exhaust pipe of an internal combustion engine comprising: a. a clamping member having 1. a flexible band surrounding the exhaust pipe adjacent the outlet port thereof and having a portion which possesses a plurality of aligned slots along the length thereof; 2. a worm rotatably attached about a substantially horizontal axis to said flexible band and operably meshing with the slots on said band such that upon rotation of the worm in one direction, the perimeter of the band is drawn into pressure engagement with the outer wall of the exhaust pipe and upon rotation in the opposite direction, the band is disengaged from the outer wall oF the exhaust pipe and whereby rotation of the worm varies the perimeter of the band to adapt the band to exhaust pipes having different outer diameters; said worm having on each end outwardly projecting shaft extension members; and b. a cover flap having a perimeter at least as large as the perimeter of the exhaust pipe and seatable in a normally closed position on the upper end of the exhaust pipe to cover said exhaust pipe; said cover flap being pivotally received about a horizontal axis on said shaft extension members whereby said worm and shaft extension members provide both a pivotal surface for the cover flap and a means for engaging the band to the exhaust pipe.
Claim 2
Independent Claim
235 words
An apparatus for covering the outlet port of an exhaust pipe of an internal combustion engine comprising: a. a clamping member having 1. a flexible band surrounding the exhaust pipe adjacent the outlet port thereof and having a portion which possesses a plurality of aligned slots along the length thereof; 2. a worm rotatably attached about a substantially horizontal axis to said flexible band and operably meshing with the slots on said band such that upon rotation of the worm in one direction, the perimeter of the band is drawn into pressure engagement with the outer wall of the exhaust pipe and upon rotation in the opposite direction, the band is disengaged from the outer wall oF the exhaust pipe and whereby rotation of the worm varies the perimeter of the band to adapt the band to exhaust pipes having different outer diameters; said worm having on each end outwardly projecting shaft extension members; and b. a cover flap having a perimeter at least as large as the perimeter of the exhaust pipe and seatable in a normally closed position on the upper end of the exhaust pipe to cover said exhaust pipe; said cover flap being pivotally received about a horizontal axis on said shaft extension members whereby said worm and shaft extension members provide both a pivotal surface for the cover flap and a means for engaging the band to the exhaust pipe.
Claim 3
Dependent Claim
31 words
An apparatus as in claim 1 wherein said cover flap includes a marginal flange depending downwardly from the periphery thereof and adapted to surround the upper end of the exhaust pipe.
Claim 4
Dependent Claim
184 words
a worm rotatably attached about a substantially horizontal axis to said flexible band and operably meshing with the slots on said band such that upon rotation of the worm in one direction, the perimeter of the band is drawn into pressure engagement with the outer wall of the exhaust pipe and upon rotation in the opposite direction, the band is disengaged from the outer wall oF the exhaust pipe and whereby rotation of the worm varies the perimeter of the band to adapt the band to exhaust pipes having different outer diameters; said worm having on each end outwardly projecting shaft extension members; and b. a cover flap having a perimeter at least as large as the perimeter of the exhaust pipe and seatable in a normally closed position on the upper end of the exhaust pipe to cover said exhaust pipe; said cover flap being pivotally received about a horizontal axis on said shaft extension members whereby said worm and shaft extension members provide both a pivotal surface for the cover flap and a means for engaging the band to the exhaust pipe.
Claim 5
Dependent Claim
184 words
a worm rotatably attached about a substantially horizontal axis to said flexible band and operably meshing with the slots on said band such that upon rotation of the worm in one direction, the perimeter of the band is drawn into pressure engagement with the outer wall of the exhaust pipe and upon rotation in the opposite direction, the band is disengaged from the outer wall oF the exhaust pipe and whereby rotation of the worm varies the perimeter of the band to adapt the band to exhaust pipes having different outer diameters; said worm having on each end outwardly projecting shaft extension members; and b. a cover flap having a perimeter at least as large as the perimeter of the exhaust pipe and seatable in a normally closed position on the upper end of the exhaust pipe to cover said exhaust pipe; said cover flap being pivotally received about a horizontal axis on said shaft extension members whereby said worm and shaft extension members provide both a pivotal surface for the cover flap and a means for engaging the band to the exhaust pipe.
Claim 6
Dependent Claim
20 words
An apparatus as in claim 1 wherein said cover flap covers said worm to protect the worm from the elements.
Claim 7
Dependent Claim
24 words
An apparatus as in claim 1 including a counterweight affixed to said cover flap to facilitate the downward pivotal movement of the cover flap.
Claim 8
Dependent Claim
37 words
An apparatus as in claim 4 wherein said counterweight is affixed to the underside of said cover flap and depends therefrom into the interior of the exhaust pipe when the cover flap is in the closed position.
Claim 9
Dependent Claim
29 words
An apparatus as in claim 1 wherein at least one of said shaft extension members has thereon means for receiving a tool for causing rotative movement of said worm.
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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) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |