Patent US3216536A successfully refreshed from Google Patents.
US3216536A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controlled, air operated, retarding device
Assignee: Individual
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Filing: 1965-03-26
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Granted: 1965-11-09
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Expires: 1985-03-26
Abstract
No abstract record available.
Inventors
- 👤 Paul S Henschel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 04:06
CPC Classifications
B; B60; B60T; B60T1/00; B60T1/02; B60T1/04; F; F16; F16D; F16D57/00; F16D57/02; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/877; Y10T137/87708; Y10T137/87772; Y10T137/87917; Y10T137/87981; Y10T137/87997
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
A RETARDING DEVICE FOR MECHANISM HAVING A ROTATABLE SHAFT, WHICH COMPRISES A ROTATABLE AIR IMPELLING FAN, A HOUSING ENCLOSING THE FAN AND HAVING AN AIR INLET PORT AND AN AIR EXHAUST PORT, BOTH OF SAID PORTS COMMUNICATING WITH THE ATMOSPHERE, ADJUSTABLE CLOSURE MEANS FOR EACH OF SAID PORTS, MEANS TO ADJUST SAID PORT CLOSURE MEANS, SAID ADJUSTING MEANS COMPRISING MEANS CONNECTING THE AIR INLET AND EXHAUST PORT CLOSURE MEANS FOR SIMULTANEOUS ADJUSTMENT SO THAT THE RESPECTIVE CLOSURE MEANS ARE MOVED IN REVERSE DIRECTIONS RELATIVE TO THEIR RESPECTIVE PORTS, AND MEANS FOR SELECTIVELY CONNECTING THE FAN IN DRIVING RELATIONSHIP WITH SAID SHAFT.
Claim 2
Dependent Claim
101 words
A RETARDING DEVICE FOR MECHANISM HAVING A ROTATABLE SHAFT, WHICH COMPRISES A ROTATABLE AIR IMPELLING FAN, A HOUSING ENCLOSING THE FAN AND HAVING AN AIR INLET PORT AND AN AIR EXHAUST PORT, BOTH OF SAID PORTS COMMUNICATING WITH THE ATMOSPHERE, ADJUSTABLE CLOSURE MEANS FOR EACH OF SAID PORTS, MEANS TO ADJUST SAID PORT CLOSURE MEANS, SAID ADJUSTING MEANS COMPRISING MEANS CONNECTING THE AIR INLET AND EXHAUST PORT CLOSURE MEANS FOR SIMULTANEOUS ADJUSTMENT SO THAT THE RESPECTIVE CLOSURE MEANS ARE MOVED IN REVERSE DIRECTIONS RELATIVE TO THEIR RESPECTIVE PORTS, AND MEANS FOR SELECTIVELY CONNECTING THE FAN IN DRIVING RELATIONSHIP WITH SAID SHAFT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |