Patent US3172339A successfully refreshed from Google Patents.
US3172339A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic lift truck
Assignee: Yale and Towne Inc
•
Filing: 1962-10-02
•
Granted: 1965-03-09
•
Expires: 1982-10-02
Abstract
No abstract record available.
Inventors
- 👤 George F Quayle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:41
CPC Classifications
F; F15; F15B; F15B15/00; F15B15/08; F15B15/14; F15B15/16; B; B66; B66F; B66F9/00; B66F9/06; B66F9/075; B66F9/08; B66F9/20; B66F9/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
IN A LIFT TRUCK HAVING VERTICAL UPRIGHTS AND A LOAD CARRIAGE MOUNTED FOR VERTICAL MOVEMENT ON SAID UPRIGHTS. A VERTICALLY EXTENDING RAM FOR LIFTING SAID LOAD CARRIAGE ON SAID UPRIGHTS, SAID RAM HAVING AN OUTER CYLINDER, A TUBULAR PISTON SLIDABLY RECEIVED WITHIN SAID CYLINDER, AND AN INNER PISTON SLIDABLY RECEIVED WITHIN SAID TUBULAR PISTON, SAID INNER PISTON HAVING AN OUTER DIAMETER SUBSTANTIALLY THE SAME AS THE INNER DIAMETER OF THE TUBULAR PISTON, AND
Claim 2
Dependent Claim
73 words
IN A LIFT TRUCK HAVING VERTICAL UPRIGHTS AND A LOAD CARRIAGE MOUNTED FOR VERTICAL MOVEMENT ON SAID UPRIGHTS. A VERTICALLY EXTENDING RAM FOR LIFTING SAID LOAD CARRIAGE ON SAID UPRIGHTS, SAID RAM HAVING AN OUTER CYLINDER, A TUBULAR PISTON SLIDABLY RECEIVED WITHIN SAID CYLINDER, AND AN INNER PISTON SLIDABLY RECEIVED WITHIN SAID TUBULAR PISTON, SAID INNER PISTON HAVING AN OUTER DIAMETER SUBSTANTIALLY THE SAME AS THE INNER DIAMETER OF THE TUBULAR PISTON, AND
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) | 1968-03-08 | 1968-09-07 | 1969-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-08 | 1972-09-07 | 1973-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-08 | 1976-09-07 | 1977-03-09 | $7700.00 | Window Closed / Lapsed |