US3348378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High pressure fail-safe gate-operating apparatus
Assignee: Individual
•
Filing: 1966-04-25
•
Granted: 1967-10-24
•
Expires: 1986-04-25
Abstract
No abstract record available.
Inventors
- 👤 Kenneth F Lemley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:42
CPC Classifications
B; B65; B65D; B65D90/00; B65D90/54; B65D90/58; B65D90/582; B65D2590/00; B65D2590/54; B65D2590/66; B65D2590/664
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
IN FAIL-SAFE GATE-OPERATING APPARATUS HAVING A RESERVOIR CONTAINING COMPRESSED AIR THAT IS USED ONLY FOR CLOSING A GATE IN EMERGENCIES, AND A SOURCE OF COMPRESSED AIR FOR CHARGING THE RESERVOIR, OF A PRESSURE INTENSIFIER CONNECTED WITH SAID RESERVOIR FOR INCREASING THE AIR PRESSURE IN THE RESERVOIR INCLUDING A CYLINDER CONBY SAID SOURCE, SAID INTENSIFIER INCLUDING A CYLINDER CONTAINING A PISTON FOR OPERATING THE INTENSIFIER, A PAIR OF CONDUITS CONNECTED WITH THE CYLINDER AT OPPOSITE SIDES OF THE PISTON, A REVERSING VALVE CONNECTED WITH SAID SOURCE FOR CONNECTING IT WITH SAID CONDUITS ALTERNATELY TO RECIPROCATE THE PISTON, AND MEANS FOR OPERATING THE VALVE.
Claim 2
Dependent Claim
102 words
IN FAIL-SAFE GATE-OPERATING APPARATUS HAVING A RESERVOIR CONTAINING COMPRESSED AIR THAT IS USED ONLY FOR CLOSING A GATE IN EMERGENCIES, AND A SOURCE OF COMPRESSED AIR FOR CHARGING THE RESERVOIR, OF A PRESSURE INTENSIFIER CONNECTED WITH SAID RESERVOIR FOR INCREASING THE AIR PRESSURE IN THE RESERVOIR INCLUDING A CYLINDER CONBY SAID SOURCE, SAID INTENSIFIER INCLUDING A CYLINDER CONTAINING A PISTON FOR OPERATING THE INTENSIFIER, A PAIR OF CONDUITS CONNECTED WITH THE CYLINDER AT OPPOSITE SIDES OF THE PISTON, A REVERSING VALVE CONNECTED WITH SAID SOURCE FOR CONNECTING IT WITH SAID CONDUITS ALTERNATELY TO RECIPROCATE THE PISTON, AND MEANS FOR OPERATING THE VALVE.
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) | 1970-10-23 | 1971-04-24 | 1971-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-23 | 1975-04-24 | 1975-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-23 | 1979-04-24 | 1979-10-24 | $7700.00 | Window Closed / Lapsed |