US3329291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Material handling apparatus
Assignee: Warner and Swasey Co
•
Filing: 1965-08-27
•
Granted: 1967-07-04
•
Expires: 1985-08-27
Abstract
No abstract record available.
Inventors
- 👤 Daniel F Przybylski
- 👤 William M Shook
- 👤 Lester H Kline
- 👤 Roy E Rice
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:38
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/28; E02F3/283; E02F3/286
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
200 words
A MATERIAL HANDLING APPARATUS COMPRISING A SUPPORT PLATFORM ROTATABLE ABOUT A VERTICAL AXIS, A BOOM SUPPORT MEANS PIVOTALLY CARRIED BY SAID SUPPORT PLATFORM, A BOOM STRUCTURE ADAPTED TO CARRY A DIGGING TOOL ON THE OUTER END THEREOF, SAID BOOM STRUCTURE BEING SUPPORTED BY SAID BOOM SUPPORT MEANS FOR LINEAR MOVEMENT RELATIVE THERETO IN A DIRECTION PARALLEL TO THE EXTENT OF SAID BOOM STRUCTURE AND OPERABLE TO EFFECT DIGGING AT A PREDETERMINED MAXIMUM DIGGING DEPTH, SAID BOOM STRUCTURE COMPRISING A PAIR OF TELESCOPING BOOM SECTIONS WITH ONE BOOM SECTION BEING HOLLOW AND THE OTHER BEING MOVABLE INTO SAID ONE BOOM SECTION, POWER MEANS TO EFFECT MOVEMENT OF SAID BOOM STRUCTURE TO A VERTICAL POSITION WHEREIN THE LONGITUDINAL AXIS OF THE BOOM STRUCTURE EXTENDS VERTICALLY RELATIVE TO SAID SUPPORT PLATFORM, AND MEANS FOR MOVING SAID BOOM STRUCTURE LINEARLY RELATIVE TO SAID BOOM SUPPORT MEANS WHEN SAID BOOM STRUCTURE IS IN ITS VERTICAL POSITION BETWEEN A POSITION WHEREIN THE TOOL ON THE OUTER END THEREOF IS ABOVE GROUND TO A POSITION WHEREIN THE TOOL ON THE OUTER END THEREOF IS LOCATED AT SAID PREDETERMINED MAXIMUM DIGGING DEPTH INCLUDING POWER MEANS FOR MOVING SAID OTHER BOOM SECTION INTO AND FROM SAID ONE BOOM SECTION.
Claim 2
Dependent Claim
200 words
A MATERIAL HANDLING APPARATUS COMPRISING A SUPPORT PLATFORM ROTATABLE ABOUT A VERTICAL AXIS, A BOOM SUPPORT MEANS PIVOTALLY CARRIED BY SAID SUPPORT PLATFORM, A BOOM STRUCTURE ADAPTED TO CARRY A DIGGING TOOL ON THE OUTER END THEREOF, SAID BOOM STRUCTURE BEING SUPPORTED BY SAID BOOM SUPPORT MEANS FOR LINEAR MOVEMENT RELATIVE THERETO IN A DIRECTION PARALLEL TO THE EXTENT OF SAID BOOM STRUCTURE AND OPERABLE TO EFFECT DIGGING AT A PREDETERMINED MAXIMUM DIGGING DEPTH, SAID BOOM STRUCTURE COMPRISING A PAIR OF TELESCOPING BOOM SECTIONS WITH ONE BOOM SECTION BEING HOLLOW AND THE OTHER BEING MOVABLE INTO SAID ONE BOOM SECTION, POWER MEANS TO EFFECT MOVEMENT OF SAID BOOM STRUCTURE TO A VERTICAL POSITION WHEREIN THE LONGITUDINAL AXIS OF THE BOOM STRUCTURE EXTENDS VERTICALLY RELATIVE TO SAID SUPPORT PLATFORM, AND MEANS FOR MOVING SAID BOOM STRUCTURE LINEARLY RELATIVE TO SAID BOOM SUPPORT MEANS WHEN SAID BOOM STRUCTURE IS IN ITS VERTICAL POSITION BETWEEN A POSITION WHEREIN THE TOOL ON THE OUTER END THEREOF IS ABOVE GROUND TO A POSITION WHEREIN THE TOOL ON THE OUTER END THEREOF IS LOCATED AT SAID PREDETERMINED MAXIMUM DIGGING DEPTH INCLUDING POWER MEANS FOR MOVING SAID OTHER BOOM SECTION INTO AND FROM SAID ONE BOOM SECTION.
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) | 1970-07-03 | 1971-01-02 | 1971-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-03 | 1975-01-02 | 1975-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-03 | 1979-01-02 | 1979-07-04 | $7700.00 | Window Closed / Lapsed |