US3713556A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lifting apparatus
Assignee: Individual
•
Filing: 1970-08-31
•
Granted: 1973-01-30
•
Expires: 1990-08-31
Abstract
Abstract A load lifting attachment for use with a fork lift truck for lifting container loads from above, comprising a horizontal main frame having at one or both ends an extension slidable longitudinally with respect to the frame, locking means for retaining the extensions in the frame, power operated means for moving the extension into and out of the frame, load engaging means at the corners of the extensions, a pair of translatable fork elements on the main frame and engageable by the forks, power operated means for moving the frame with respect to said forks.
Inventors
- 👤 J Tredray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:51
CPC Classifications
B; B66; B66F; B66F9/00; B66F9/06; B66F9/075; B66F9/12; B66F9/18; B66F9/186
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
346 words
A load lifting attachment for use with a fork lift truck for lifting container loads from above, comprising in combination: a substantially horizontal main frame having longitudinally extending channel means opening onto at least one end thereof; extension means slidably received in said channel means; a pair of transverse elements at the opposite ends of said main frame, one of which is fixed to said extension means whereby the transverse elements are relatively movable with respect to each other; means for retaining said extension means in selected positions with respect to said main frame; load engaging means at each end of each transverse element for selectively engaging the corners of a container; a pair of fork receiving means for longitudinal movement along said main frame, said fork receiving means presenting tunnel portions receiving said main frame and each having opposite side portions having aligned openings below said main frame for receiving respective forks of a fork lift truck; bearing means in said opposite side portions aligned below said main frame for engaging upper surfaces of the forks; first power operated means connected between said main frame and at least one of said fork receiving means for effecting longitudinal movement thereof with respect to said main frame; second power operated means for shifting said attachment along said forks; said main frame comprising a rectangular frame formed of two horizontal elongated hollow elements separated and secured together by transoms and mounted on said fork receiving elements, said extension being U -shaped in form, the arms of which are movable within channels in said main frame elongated elements, power operated means being provided to telescope said extension arms into and out of said channels of said main frame, said power operated means comprising a rod connected to said extension element and extending along said main frame, an endless chain running round sprockets mounted on said main frame, a prime mover driving said sprocket, said chain being connected to said rod whereby on operation of said power operated means said extension is telescoped into or out of said main frame.
Claim 2
Dependent Claim
346 words
A load lifting attachment for use with a fork lift truck for lifting container loads from above, comprising in combination: a substantially horizontal main frame having longitudinally extending channel means opening onto at least one end thereof; extension means slidably received in said channel means; a pair of transverse elements at the opposite ends of said main frame, one of which is fixed to said extension means whereby the transverse elements are relatively movable with respect to each other; means for retaining said extension means in selected positions with respect to said main frame; load engaging means at each end of each transverse element for selectively engaging the corners of a container; a pair of fork receiving means for longitudinal movement along said main frame, said fork receiving means presenting tunnel portions receiving said main frame and each having opposite side portions having aligned openings below said main frame for receiving respective forks of a fork lift truck; bearing means in said opposite side portions aligned below said main frame for engaging upper surfaces of the forks; first power operated means connected between said main frame and at least one of said fork receiving means for effecting longitudinal movement thereof with respect to said main frame; second power operated means for shifting said attachment along said forks; said main frame comprising a rectangular frame formed of two horizontal elongated hollow elements separated and secured together by transoms and mounted on said fork receiving elements, said extension being U -shaped in form, the arms of which are movable within channels in said main frame elongated elements, power operated means being provided to telescope said extension arms into and out of said channels of said main frame, said power operated means comprising a rod connected to said extension element and extending along said main frame, an endless chain running round sprockets mounted on said main frame, a prime mover driving said sprocket, said chain being connected to said rod whereby on operation of said power operated means said extension is telescoped into or out of said main frame.
Claim 3
Dependent Claim
346 words
A load lifting attachment for use with a fork lift truck for lifting container loads from above, comprising in combination: a substantially horizontal main frame having longitudinally extending channel means opening onto at least one end thereof; extension means slidably received in said channel means; a pair of transverse elements at the opposite ends of said main frame, one of which is fixed to said extension means whereby the transverse elements are relatively movable with respect to each other; means for retaining said extension means in selected positions with respect to said main frame; load engaging means at each end of each transverse element for selectively engaging the corners of a container; a pair of fork receiving means for longitudinal movement along said main frame, said fork receiving means presenting tunnel portions receiving said main frame and each having opposite side portions having aligned openings below said main frame for receiving respective forks of a fork lift truck; bearing means in said opposite side portions aligned below said main frame for engaging upper surfaces of the forks; first power operated means connected between said main frame and at least one of said fork receiving means for effecting longitudinal movement thereof with respect to said main frame; second power operated means for shifting said attachment along said forks; said main frame comprising a rectangular frame formed of two horizontal elongated hollow elements separated and secured together by transoms and mounted on said fork receiving elements, said extension being U -shaped in form, the arms of which are movable within channels in said main frame elongated elements, power operated means being provided to telescope said extension arms into and out of said channels of said main frame, said power operated means comprising a rod connected to said extension element and extending along said main frame, an endless chain running round sprockets mounted on said main frame, a prime mover driving said sprocket, said chain being connected to said rod whereby on operation of said power operated means said extension is telescoped into or out of said main frame.
Claim 4
Dependent Claim
346 words
A load lifting attachment for use with a fork lift truck for lifting container loads from above, comprising in combination: a substantially horizontal main frame having longitudinally extending channel means opening onto at least one end thereof; extension means slidably received in said channel means; a pair of transverse elements at the opposite ends of said main frame, one of which is fixed to said extension means whereby the transverse elements are relatively movable with respect to each other; means for retaining said extension means in selected positions with respect to said main frame; load engaging means at each end of each transverse element for selectively engaging the corners of a container; a pair of fork receiving means for longitudinal movement along said main frame, said fork receiving means presenting tunnel portions receiving said main frame and each having opposite side portions having aligned openings below said main frame for receiving respective forks of a fork lift truck; bearing means in said opposite side portions aligned below said main frame for engaging upper surfaces of the forks; first power operated means connected between said main frame and at least one of said fork receiving means for effecting longitudinal movement thereof with respect to said main frame; second power operated means for shifting said attachment along said forks; said main frame comprising a rectangular frame formed of two horizontal elongated hollow elements separated and secured together by transoms and mounted on said fork receiving elements, said extension being U -shaped in form, the arms of which are movable within channels in said main frame elongated elements, power operated means being provided to telescope said extension arms into and out of said channels of said main frame, said power operated means comprising a rod connected to said extension element and extending along said main frame, an endless chain running round sprockets mounted on said main frame, a prime mover driving said sprocket, said chain being connected to said rod whereby on operation of said power operated means said extension is telescoped into or out of said main frame.
Claim 5
Dependent Claim
57 words
A load lifting attachment according to claim 1, wherein said main frame comprises a pair of spaced substantially horizontal frame elements and said end portions of said transverse elements have substantially horizontal extension elements perpendicular thereto slidable with respect to said main frame elements to form a rectangular frame extensible in length at least at one end.
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) | 1976-01-30 | 1976-07-31 | 1977-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-30 | 1980-07-31 | 1981-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-30 | 1984-07-31 | 1985-01-30 | $7700.00 | Window Closed / Lapsed |