Patent US509975A successfully refreshed from Google Patents.
US3716004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory damper for high temerature or corrosive gases
Assignee: Community Bank
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Filing: 1972-03-27
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Granted: 1973-02-13
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Expires: 1992-03-27
Abstract
Abstract A recirculating dryer system is disclosed wherein combustion gases from a waste wood-fired furnace are circulated through a wood veneer dryer or lumber dry kiln and returned to a mixing chamber for exposure to the hot gases leaving the furnace, causing incineration of volatile hydrocarbons and wood fiber picked up by the gas stream in its passage over the veneer or lumber. A novel form of damper construction is employed to provide a damper in elevated position between the fuel cell of the furnace and said mixing chamber. The damper comprises an apertured block of refractory material having an inverted pendulum support provided by a pair of pivotal columns.
Inventors
- 👤 A Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:25
CPC Classifications
F; F26; F26B; F26B9/00; F26B9/06; F26B2210/00; F26B2210/16
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
74 words
A damper comprising a block of refractory material having openings therethrough; a horizontal beam supporting said block; and an inverted pendulum support for said beam comprising a pair of columns at opposite ends of said beam, pivotal connections between said beam and the upper ends of said columns, and pivotal supports for the lower ends of said columns; and means for moving the damper horizontally in the vertical plane of said beam and columns.
Claim 2
Dependent Claim
74 words
A damper comprising a block of refractory material having openings therethrough; a horizontal beam supporting said block; and an inverted pendulum support for said beam comprising a pair of columns at opposite ends of said beam, pivotal connections between said beam and the upper ends of said columns, and pivotal supports for the lower ends of said columns; and means for moving the damper horizontally in the vertical plane of said beam and columns.
Claim 3
Dependent Claim
74 words
A damper comprising a block of refractory material having openings therethrough; a horizontal beam supporting said block; and an inverted pendulum support for said beam comprising a pair of columns at opposite ends of said beam, pivotal connections between said beam and the upper ends of said columns, and pivotal supports for the lower ends of said columns; and means for moving the damper horizontally in the vertical plane of said beam and columns.
Claim 4
Dependent Claim
74 words
A damper comprising a block of refractory material having openings therethrough; a horizontal beam supporting said block; and an inverted pendulum support for said beam comprising a pair of columns at opposite ends of said beam, pivotal connections between said beam and the upper ends of said columns, and pivotal supports for the lower ends of said columns; and means for moving the damper horizontally in the vertical plane of said beam and columns.
Claim 5
Dependent Claim
81 words
A damper as defined in claim 1, said pivotal connections between said beam and the upper ends of said columns each comprising an upstanding yoke on the upper end of the column encircling said beam, arcuate bearing plates on top of said yoke, vertical bolts in said beam projecting upward through the top of said yoke and said arcuate bearing plates, and bearing members on the upper ends of said bolts resting on said arcuate bearing plates and supporting said beam.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-13 | 1976-08-14 | 1977-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-13 | 1980-08-14 | 1981-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-13 | 1984-08-14 | 1985-02-13 | $7700.00 | Window Closed / Lapsed |