US3259369A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Load lifting apparatus
Assignee: READY LIFT Manufacturing CO
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Filing: 1964-11-12
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Granted: 1966-07-05
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Expires: 1984-11-12
Abstract
No abstract record available.
Inventors
- 👤 William W Gridley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:45
CPC Classifications
B; B66; B66F; B66F7/00; B66F7/06; B66F7/065; B66F7/0666; B66F7/0625; B66F7/08; Y; Y10; Y10S; Y10S187/00; Y10S187/90
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
A LOAD LIFTING APPARATUS COMPRISING: FIRST AND SECOND FRAMES; UPPER AND LOWER CROSSED LEVER MEANS PIVOTALLY INTERPOSED BETWEEN SAID FRAMES, THE INNER ENDS OF SAID LEVER MEANS BEING PIVOTALLY INTERCONNECTED TO DEFINE A CENTREL PARALLELLOGRAM PORTION WHEN SAID FRAMES ARE IN A PARTIALLY EXTENDED CONDITION WITH THE EXTENDING OUT ENDS OF SAID LEVER MEANS COUPLED TO SAID FIRST AND SECOND FRAMES, RESPECTIVELY; DRIVE BAR MEANS COUPLED TO OPPOSITE SIDES OF SAID PARALLELLOGRAM; AND EXPANSIBLE RAM MEANS COUPLED TO AN INTERMEDIATE POINT ON SAID DRIVE BAR MEANS DISPLACED LATERALLY FROM A STRAIGHT LINE DRAWN BETWEEN THE ENDS OF SAID DRIVE BAR MEANS AND TO A POINT ON ONE OF SAID CROSSED LEVER MEANS DEFINING A REMAINING SIDE OF SAID PARALLELOGRAM SO THAT SAID CROSS LEVER MEANS MAY COLLAPSE IN SCISSORING FASHION TO A SUBSTANTIALLY FLAT COMFIGURATION WITH THE DISPLACED INTERMEDIATE POINT EXTENDING LATERALLY FROM THE PLANE OF SAID FLAT CONFIGURATION.
Claim 2
Dependent Claim
149 words
A LOAD LIFTING APPARATUS COMPRISING: FIRST AND SECOND FRAMES; UPPER AND LOWER CROSSED LEVER MEANS PIVOTALLY INTERPOSED BETWEEN SAID FRAMES, THE INNER ENDS OF SAID LEVER MEANS BEING PIVOTALLY INTERCONNECTED TO DEFINE A CENTREL PARALLELLOGRAM PORTION WHEN SAID FRAMES ARE IN A PARTIALLY EXTENDED CONDITION WITH THE EXTENDING OUT ENDS OF SAID LEVER MEANS COUPLED TO SAID FIRST AND SECOND FRAMES, RESPECTIVELY; DRIVE BAR MEANS COUPLED TO OPPOSITE SIDES OF SAID PARALLELLOGRAM; AND EXPANSIBLE RAM MEANS COUPLED TO AN INTERMEDIATE POINT ON SAID DRIVE BAR MEANS DISPLACED LATERALLY FROM A STRAIGHT LINE DRAWN BETWEEN THE ENDS OF SAID DRIVE BAR MEANS AND TO A POINT ON ONE OF SAID CROSSED LEVER MEANS DEFINING A REMAINING SIDE OF SAID PARALLELOGRAM SO THAT SAID CROSS LEVER MEANS MAY COLLAPSE IN SCISSORING FASHION TO A SUBSTANTIALLY FLAT COMFIGURATION WITH THE DISPLACED INTERMEDIATE POINT EXTENDING LATERALLY FROM THE PLANE OF SAID FLAT CONFIGURATION.
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) | 1969-07-04 | 1970-01-03 | 1970-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-04 | 1974-01-03 | 1974-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-04 | 1978-01-03 | 1978-07-05 | $7700.00 | Window Closed / Lapsed |