US3168284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hoist mechanism
Assignee: Individual
•
Filing: 1962-07-18
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Granted: 1965-02-02
•
Expires: 1982-07-18
Abstract
No abstract record available.
Inventors
- 👤 James L Fisher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:09
CPC Classifications
B; B66; B66F; B66F11/00; B66F11/04; B66F11/048
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A HOIST MECHANISM COMPRISING: A SUPPORTING BASE; A BOOM PIVOTALLY SUPPORTED FOR VERTICAL SWINGING MOVEMENT ON SAID BASE; HYDRAULIC ELEVATING MEANS INCLUDING A VALVE FOR EFFECTING RAISING, LOWERING AND STATIONARY POSITIONING OF SAID BOOM; A MEMBER OPERATIVELY CONNECTED TO SAID ELEVATING MEANS FOR MOVEMENT PROPORTIONAL TO VERTICAL MOVEMENT OF SAID BOOM; SAID MEANS INCLUDING ADJUSTABLE LIMIT STOP MEANS ON SAID MEMBER FOR OPERATING SAID VALVE TO TERMINATE MOVEMENT OF SAID BOOM IN RESPONSE TO PREDETERMINED VERTICAL MOVEMENT OF THE BOOM.
Claim 2
Dependent Claim
80 words
A HOIST MECHANISM COMPRISING: A SUPPORTING BASE; A BOOM PIVOTALLY SUPPORTED FOR VERTICAL SWINGING MOVEMENT ON SAID BASE; HYDRAULIC ELEVATING MEANS INCLUDING A VALVE FOR EFFECTING RAISING, LOWERING AND STATIONARY POSITIONING OF SAID BOOM; A MEMBER OPERATIVELY CONNECTED TO SAID ELEVATING MEANS FOR MOVEMENT PROPORTIONAL TO VERTICAL MOVEMENT OF SAID BOOM; SAID MEANS INCLUDING ADJUSTABLE LIMIT STOP MEANS ON SAID MEMBER FOR OPERATING SAID VALVE TO TERMINATE MOVEMENT OF SAID BOOM IN RESPONSE TO PREDETERMINED VERTICAL MOVEMENT OF THE BOOM.
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) | 1968-02-02 | 1968-08-03 | 1969-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-02 | 1972-08-03 | 1973-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-02 | 1976-08-03 | 1977-02-02 | $7700.00 | Window Closed / Lapsed |