US3308745A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air diffuser
Assignee: Individual
•
Filing: 1965-09-10
•
Granted: 1967-03-14
•
Expires: 1985-09-10
Abstract
No abstract record available.
Inventors
- 👤 Davies Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:22
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/08; F24F13/10; F24F13/14; F24F13/1406; F24F13/02; F24F13/06; F24F13/072; E; E04; E04B; E04B9/00; E04B9/02; E04B2009/026
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
IN AN AIR DIFFUSER, A PAIR OF OPPOSED CONCAVE WALLS DEFINING AN AIR PASSAGE BETWEEN THEM AND ARRANGED SYMMETRICALLY ON OPPOSITE SIDES OF A HORIZONTAL CENTER LINE, THE WALL CURVATURES BEING CONCENTRIC TO SAID LINE, THE UPPER WALL EDGES BEING SPACED TO FORM AN INLET FOR AIR TO BE DIFFUSED, THE LOWER WALL EDGES BEING SPACED TO FORM AN OUTLET, THE SPACING BETWEEN THE LOWER EDGES BEING GREATER THAN THE SPACING BETWEEN THE UPPER EDGES, A SHAFT MOUNTED FOR ROTATIVE ADJUSTMENT ON AN AXIS COINCIDENT WITH SAID CENTER LINE, AND VANES CARRIED BY SAID SHAFT AND EXTENDING RADIALLY IN OPPOSITE DIRECTIONS, THE OUTER EDGES OF SAID VANES BEING ADAPTED TO ENGAGE WITH SAID WALLS WHEN THE SHAFT IS ROTATED, WHEREBY SAID VANES MAY BE OPTIONALLY POSITIONED (A) WITH BOTH VANES OUT OF ENGAGEMENT WITH
Claim 2
Dependent Claim
134 words
IN AN AIR DIFFUSER, A PAIR OF OPPOSED CONCAVE WALLS DEFINING AN AIR PASSAGE BETWEEN THEM AND ARRANGED SYMMETRICALLY ON OPPOSITE SIDES OF A HORIZONTAL CENTER LINE, THE WALL CURVATURES BEING CONCENTRIC TO SAID LINE, THE UPPER WALL EDGES BEING SPACED TO FORM AN INLET FOR AIR TO BE DIFFUSED, THE LOWER WALL EDGES BEING SPACED TO FORM AN OUTLET, THE SPACING BETWEEN THE LOWER EDGES BEING GREATER THAN THE SPACING BETWEEN THE UPPER EDGES, A SHAFT MOUNTED FOR ROTATIVE ADJUSTMENT ON AN AXIS COINCIDENT WITH SAID CENTER LINE, AND VANES CARRIED BY SAID SHAFT AND EXTENDING RADIALLY IN OPPOSITE DIRECTIONS, THE OUTER EDGES OF SAID VANES BEING ADAPTED TO ENGAGE WITH SAID WALLS WHEN THE SHAFT IS ROTATED, WHEREBY SAID VANES MAY BE OPTIONALLY POSITIONED (A) WITH BOTH VANES OUT OF ENGAGEMENT WITH
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) | 1970-03-13 | 1970-09-12 | 1971-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-13 | 1974-09-12 | 1975-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-13 | 1978-09-12 | 1979-03-14 | $7700.00 | Window Closed / Lapsed |