US3826183A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor-powered self-opening and closing ventilators
Assignee: Individual
•
Filing: 1973-01-02
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Granted: 1974-07-30
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Expires: 1993-01-02
Abstract
Abstract Motor-powered ventilators having a domed top or lid which is opened by air pressure therebeneath when the ventilator is operating and which closes when the ventilator is not operating. The ventilators are of completely symmetrical form.
Inventors
- 👤 K Rudine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:39
CPC Classifications
F; F04; F04D; F04D25/00; F04D25/02; F04D25/08; F04D25/12; F04D25/14; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7904; Y10T137/7908; Y10T137/7909; Y10T137/7913; Y10T137/7915; Y10T137/7918
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
203 words
Ventilator, comprising an upwardly concave lower body and a downwardly concave lid adapted to fit upon and to close the upper side of said lower body, said lid serving both as the top cover of said ventilator and as a damper to close said ventilator, one or the other of said body and lid having plural parallel peripherally disposed rod means extending therefrom each slidably received through a separate hole through the periphery of the other and permitting said lid to be moved levelly straight upward from said body to an open position centered above said body by sliding of said rod means through said holes responsive to air movement against the underside of said lid from said lower body, said rod means having end enlargements to retain said rod means in said holes, tubular air inlet means disposed upwardly centrally through said body, and means for impelling air upwardly through said air inlet means to impinge against the underside of said lid, the pressure of air entering through said air inlet means when said impelling means is operating moving said lid upward to open position, said lid moving down to closed position when by gravity when said impelling means is not operating.
Claim 2
Dependent Claim
203 words
Ventilator, comprising an upwardly concave lower body and a downwardly concave lid adapted to fit upon and to close the upper side of said lower body, said lid serving both as the top cover of said ventilator and as a damper to close said ventilator, one or the other of said body and lid having plural parallel peripherally disposed rod means extending therefrom each slidably received through a separate hole through the periphery of the other and permitting said lid to be moved levelly straight upward from said body to an open position centered above said body by sliding of said rod means through said holes responsive to air movement against the underside of said lid from said lower body, said rod means having end enlargements to retain said rod means in said holes, tubular air inlet means disposed upwardly centrally through said body, and means for impelling air upwardly through said air inlet means to impinge against the underside of said lid, the pressure of air entering through said air inlet means when said impelling means is operating moving said lid upward to open position, said lid moving down to closed position when by gravity when said impelling means is not operating.
Claim 3
Dependent Claim
35 words
The combination of claim 1, said air inlet means comprising tube means fixed vertically through an opening through the bottom of said body at its center and extending upwardly above said bottom of said body.
Claim 4
Dependent Claim
59 words
The combination of claim 2, said lid having protruding means extending around its interior spaced uniformly from its center, air entering through said air inlet means striking the underside of said lid centrally thereof and flowing outwardly in all directions across said protruding means to maintain said lid floating levelly above said body when said impelling means is operating.
Claim 5
Dependent Claim
17 words
The combination of claim 3, said body, inlet tube, lid and protruding means being circular and concentric.
Claim 6
Dependent Claim
42 words
The combination of claim 4, said inlet tube terminating upwardly above the upper edge of said body, said ventilator including upwardly conically convergent annular plate means connected between the upper end of said inlet tube and the upper edge of said body.
Claim 7
Dependent Claim
21 words
The combination of claim 5, said air impelling means comprising electric motor driven blower means disposed within said inlet tube means.
Claim 8
Dependent Claim
41 words
The combination of claim 6, the lower end of said inlet tube means being connectable to a roof jack of the type used to mount rotary ventilators whereby said ventilator may be installed on a said roof jack without modification thereof.
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) | 1977-07-29 | 1978-01-28 | 1978-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-29 | 1982-01-28 | 1982-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-29 | 1986-01-28 | 1986-07-30 | $7700.00 | Window Closed / Lapsed |