US3836073A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heating, cooling and ventilating grills
Assignee: Individual
•
Filing: 1972-12-04
•
Granted: 1974-09-17
•
Expires: 1992-12-04
Abstract
Abstract The invention herein disclosed is concerned with a temperature controlled air ventilation outlet grill. The grill comprises a frame in which are mounted a plurality of pivoted louvres biased towards a closed position with a bimetal actuator sensing the room temperature moving the louvers towards their closed position upon appropriate room temperature changes.
Inventors
- 👤 W Evans
- 👤 I Fraser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:18
CPC Classifications
F; F24; F24F; F24F11/00; F24F11/70; F24F11/72; F24F11/74; F24F11/76; F24F13/00; F24F13/08; F24F13/10; F24F13/14; F24F13/15; G; G01; G01V; G01V1/00; G01V1/24
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
169 words
A grill for heating, cooling or ventilating system and comprising a frame having an air inlet side and an air outlet side, a plurality of interconnected louvres pivotally mounted on and extending across said frame, a temperature sensitive actuator mounted on the frame and connected to said louvres so as to pivot same and adjust the effective flow area through the grill in accordance with a change in temperature, said actuator projecting from the air outlet side of the frame in a direction away from the air inlet side of the frame, whereby, in use, the actuator projects into the space being heated, cooled or ventilated and is sensitive to the ambient temperature of said space, means biassing the pivotally adjustable louvres towards their closed position, and a control member held in the open position of the grill by a catch which includes a bi-metallic element adapted to release the catch at a predetermined temperature, so that the louvres are urged to their closed position by said biassing means.
Claim 2
Dependent Claim
169 words
A grill for heating, cooling or ventilating system and comprising a frame having an air inlet side and an air outlet side, a plurality of interconnected louvres pivotally mounted on and extending across said frame, a temperature sensitive actuator mounted on the frame and connected to said louvres so as to pivot same and adjust the effective flow area through the grill in accordance with a change in temperature, said actuator projecting from the air outlet side of the frame in a direction away from the air inlet side of the frame, whereby, in use, the actuator projects into the space being heated, cooled or ventilated and is sensitive to the ambient temperature of said space, means biassing the pivotally adjustable louvres towards their closed position, and a control member held in the open position of the grill by a catch which includes a bi-metallic element adapted to release the catch at a predetermined temperature, so that the louvres are urged to their closed position by said biassing means.
Claim 3
Dependent Claim
93 words
A grill as claimed in claim 2, in which the control member is a lever having two opposed arms straddling and pivotally connected at one end to a segment secured to the frame, the arms have opposed holes which are aligned with any one of an arcuate series of holes in the segment, the lever at its other end carries a bi-metallic element generally of U-shape, and the free ends of the legs of the U have bosses which project through the holes in said arms into the aligned hole in the segment.
Claim 4
Dependent Claim
34 words
A grill as claimed in claim 3, in which the free ends of the legs of the bi-metallic element are urged towards the arms by a generally U-shaped leaf spring overlying the bi-metallic element.
Claim 5
Dependent Claim
31 words
A grill as claimed in claim 2, in which the louvres are interconnected by a bar which is biassed by a spring to the position in which the louvres are closed.
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) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |