US3086552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Counterbalance mechanism
Assignee: FMC Corp
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Filing: 1960-05-20
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Granted: 1963-04-23
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Expires: 1980-05-20
Abstract
No abstract record available.
Inventors
- 👤 Beverly P Ragsdale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:14
CPC Classifications
B; B67; B67D; B67D7/00; B67D7/002; B67D9/00; B67D9/02; F; F16; F16L; F16L27/00; F16L27/08; F16L27/0861; Y; Y10; Y10S; Y10S137/00; Y10S137/903; Y10T; Y10T137/00; Y10T137/8593; Y10T137/8807
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
146 words
A COUNTERBALANCE FOR A LOADING ARM STRUCTURE COMPRISING A FIRST CONDUIT AND A SECOND CONDUIT PROJECTING FORWARD THEREFROM AND CONNECTED THERETO FOR PIVOTAL MOVEMENT ABOUT A HORIZONTAL AXIS, SAID COUNTERBALANCE COMPRISING A HOUSING FIXED TO ONE OF SAID CONDUITS, SPRING MEANS WITHIN SAID HOUSING AND AFFIXED THERETO, A CHAIN TENSIONED BY SAID SPRING MEANS, A BRACKET MOUNTED ON THE OTHER OF SAID CONDUITS, A PIVOT PIN CARRIED BY SAID BRACKET ABOVE AND TO THE REAR OF SAID HORIZONTAL AXIS ABOUT WHICH SAID SECOND CONDUIT PIVOTS, A LINK CONNECTED TO SAID PIVOT PIN, SAID CHAIN BEING PIVOTALLY CONNECTED TO SAID LINK, AND A STOP SCREW ON SAID LINK ADAPTED TO CONTACT SAID BRACKET AT A PREDETERMINED ELEVATION OF SAID SECOND CONDUIT WHEREBY THE TURNING MOMENT APPLIED TO SAID SECOND CONDUIT BY SAID SPRING MEANS AND CHAIN IS INCREASED BY SHIFTING OF THE PIVOT POINT FOR SAID CHAIN.
Claim 2
Dependent Claim
146 words
A COUNTERBALANCE FOR A LOADING ARM STRUCTURE COMPRISING A FIRST CONDUIT AND A SECOND CONDUIT PROJECTING FORWARD THEREFROM AND CONNECTED THERETO FOR PIVOTAL MOVEMENT ABOUT A HORIZONTAL AXIS, SAID COUNTERBALANCE COMPRISING A HOUSING FIXED TO ONE OF SAID CONDUITS, SPRING MEANS WITHIN SAID HOUSING AND AFFIXED THERETO, A CHAIN TENSIONED BY SAID SPRING MEANS, A BRACKET MOUNTED ON THE OTHER OF SAID CONDUITS, A PIVOT PIN CARRIED BY SAID BRACKET ABOVE AND TO THE REAR OF SAID HORIZONTAL AXIS ABOUT WHICH SAID SECOND CONDUIT PIVOTS, A LINK CONNECTED TO SAID PIVOT PIN, SAID CHAIN BEING PIVOTALLY CONNECTED TO SAID LINK, AND A STOP SCREW ON SAID LINK ADAPTED TO CONTACT SAID BRACKET AT A PREDETERMINED ELEVATION OF SAID SECOND CONDUIT WHEREBY THE TURNING MOMENT APPLIED TO SAID SECOND CONDUIT BY SAID SPRING MEANS AND CHAIN IS INCREASED BY SHIFTING OF THE PIVOT POINT FOR SAID CHAIN.
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) | 1966-04-22 | 1966-10-22 | 1967-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-22 | 1970-10-22 | 1971-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-22 | 1974-10-22 | 1975-04-23 | $7700.00 | Window Closed / Lapsed |