US3605781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic relay
Assignee: Honeywell Inc
•
Filing: 1970-07-16
•
Granted: 1971-09-20
•
Expires: 1990-07-16
Abstract
Abstract A PNEUMATIC RELAY UTILIZING DIAPHRAGM LOGIC FOR PROVIDING AN OUTPUT PRESSURE TO A FRESH AIR DAMPER MOTOR OR THE LIKE. THE DAMPER IS HELD CLOSED UNTIL THE INPUT PRESSURE TO THE RELAY REACHES A FIRST LEVEL WHEREUPON THE DAMPER IS OPENED TO A PRESELECTED POSITION ADMITTING A PRESELECTED PERCENTAGE OF FRESH AIR, WHICH POSITION IS MAINTAINED UNTIL THE INPUT PRESSURE REACHES A PRESELECTED SECOND LEVEL, WHEREAFTER THE DAMPER CONTINUES TO OPEN AS THE INPUT PRESSURE CONTINUES TO INCREASE UNTIL 100% FRESH AIR IS ADMITTED.
Inventors
- 👤 Frederick D Joesting
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:22
CPC Classifications
F; F24; F24F; F24F11/00; F24F11/70; F24F11/72; F24F11/74; F24F11/76; Y; Y10; Y10T; Y10T137/00; Y10T137/2278; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2605; Y10T137/2617; Y10T137/262
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |