Patent US3123218A successfully refreshed from Google Patents.
US3123218A
Expired / Lapsed
US
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Self-leveling device
Assignee: —
•
Filing: —
•
Granted: 1964-03-03
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Expires: 1981-03-03
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:06
CPC Classifications
B; B65; B65G; B65G1/00; B65G1/02; B65G1/04; B65G1/06; B65G1/07; A; A47; A47B; A47B81/00; A47B81/04; Y; Y10; Y10S; Y10S414/00; Y10S414/10; Y10S414/102; Y10S414/103; Y10S414/104
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
AN IMPROVED SELF-LEVELING DEVICE COMPRISING IN COMBINATION A BASE MEMBER SUPPORTING AN UPRIGHT FRAME, A VERTICALLY MOVABLE CARRIAGE ASSOCIATED WITH SAID FRAME, SAID CARRIAGE SUPPORTING CARRIER MEANS, TORSION SPRING MEANS, SAID CARRIAGE BEING SUPPORTED BY A FLEXIBLE MEMBER COMMUNICATING BETWEEN SAID UPRIGHT FRAME AND SAID TORSION SPRING MEANS, AND MEANS FOR IMPARTING AN INITIAL SET TO SAID SPRING MEANS, WHEREBY THE TOPMOST PORTIONS OF ARTICLES PROVIDED ON SAID CARRIER MEANS ARE MAINTAINED AT A CONSTANT LEVEL INDEPENDENTLY OF THE NUMBER OF SUCH ARTICLES, SAID TORSION SPRING MEANS BEING NON-LINEAR, AND NON-RESILIENT MEANS OPERABLE IN RESPONSE TO CARRIAGE MOVEMENT TO COMPENSATE FOR SAID NON-LINEARITY.
Claim 2
Dependent Claim
103 words
AN IMPROVED SELF-LEVELING DEVICE COMPRISING IN COMBINATION A BASE MEMBER SUPPORTING AN UPRIGHT FRAME, A VERTICALLY MOVABLE CARRIAGE ASSOCIATED WITH SAID FRAME, SAID CARRIAGE SUPPORTING CARRIER MEANS, TORSION SPRING MEANS, SAID CARRIAGE BEING SUPPORTED BY A FLEXIBLE MEMBER COMMUNICATING BETWEEN SAID UPRIGHT FRAME AND SAID TORSION SPRING MEANS, AND MEANS FOR IMPARTING AN INITIAL SET TO SAID SPRING MEANS, WHEREBY THE TOPMOST PORTIONS OF ARTICLES PROVIDED ON SAID CARRIER MEANS ARE MAINTAINED AT A CONSTANT LEVEL INDEPENDENTLY OF THE NUMBER OF SUCH ARTICLES, SAID TORSION SPRING MEANS BEING NON-LINEAR, AND NON-RESILIENT MEANS OPERABLE IN RESPONSE TO CARRIAGE MOVEMENT TO COMPENSATE FOR SAID NON-LINEARITY.
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) | 1967-03-03 | 1967-09-02 | 1968-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-03 | 1971-09-02 | 1972-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-03 | 1975-09-02 | 1976-03-03 | $7700.00 | Window Closed / Lapsed |