Patent US3606245A successfully refreshed from Google Patents.
US3606245A
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Control damper
Assignee: Philips Industrial Components Inc
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Filing: 1969-06-30
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Granted: 1971-09-20
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Expires: 1989-06-30
Abstract
Abstract A DAMPER HAVING A RECTANGULAR FRAME PROVIDED WITH A LONGITUDINAL GROOVE IN EACH FRAME SIDE MEMBER. A PIVOTED BLADE HAS TUBULAR, CYLINDRICAL HUBS EXTENDING INTO THE GROOVES AND A SEAL IN EACH GROOVE IS CONFIGURED TO SEALINGLY ENGAGE THE ARCUATE OUTER SURFACE OF A CORRESPONDING HUB THROUGHOUT THE MOVEMENT OF THE BLADES TO INSURE ADEQUATE SEALING BETWEEN THE FRAME AND BLADE WHEN THE LATTER IS IN ITS BLOCKING POSITION.
Inventors
- 👤 William A Reichow
- 👤 Thomas D Hill
- 👤 James R Root
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:48
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/16; F16K1/165; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87265; Y10T137/8741; Y10T137/87442; Y10T137/8745; Y10T137/87523; Y10T137/87531
Claims Analysis
Total Claims: 0
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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) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |