US4898086A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Living space ventilation
Assignee: Individual
•
Filing: 1988-07-05
•
Granted: 1990-02-06
•
Expires: 2008-07-05
Abstract
Abstract At dawn the outside air is coolest over the 24 hour daily cycle. A photo electric device actuates a fan just after dawn to ventilate the house and is later switched off by a time delay device. Existing fans may be used.
Inventors
- 👤 Alan H. Norris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:58
CPC Classifications
F; F24; F24F; F24F11/00; F24F11/0001
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
83 words
A method of ventilating living space with the coolest outside air obtainable in the 24 hour daily cycle by utilising a photoelectric device to provide a signal when the outside light is increasing at dawn, at which time the outside air is at its coolest, and using this signal to actuate electrical contacts which start operating an air moving device propelling air into or out of the living space so as to exchange inside air with outside air thus effecting ventilation of the
Claim 2
Independent Claim
83 words
A method of ventilating living space with the coolest outside air obtainable in the 24 hour daily cycle by utilising a photoelectric device to provide a signal when the outside light is increasing at dawn, at which time the outside air is at its coolest, and using this signal to actuate electrical contacts which start operating an air moving device propelling air into or out of the living space so as to exchange inside air with outside air thus effecting ventilation of the
Claim 3
Dependent Claim
57 words
The method of claim 1 wherein the photoelectric device signal actuates a timing device which then starts the air moving device operating, thus starting ventilation of the living space, and which timing device, after a predetermined time, further actuates electrical contacts inhibiting the operation of the air moving device thus stopping the ventilation of the living space.
Claim 4
Dependent Claim
15 words
The method of claim 1 wherein the air moving device is a bathroom ventilating fan.
Claim 5
Dependent Claim
17 words
The method of claim 1 wherein the air moving device is part of a cooking equipment hood.
Claim 6
Dependent Claim
17 words
The method of claim 1 wherein the air moving device is part of a clothes drying machine.
References Cited (Backward Citations)
US2104088A
Cited
US3235247A
Cited
US3337992A
Cited
US4099047A
Cited
US4105015A
Cited
US4251026A
Cited
FR2492062A1
Cited
JPS61130741A
Cited
JPS6217545A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-02-05 | 1993-08-07 | 1994-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-05 | 1997-08-07 | 1998-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-05 | 2001-08-07 | 2002-02-06 | $7700.00 | Window Closed / Lapsed |