US3688933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lifting attachment for fork lift trucks and the like
Assignee: Individual
•
Filing: 1970-12-07
•
Granted: 1972-09-05
•
Expires: 1990-12-07
Abstract
Abstract An article lifting attachment for a fork lift truck or similar hoisting system is provided. The attachment includes a frame equipped with oversize tine-engaging channels and tensible link members for allowing limited longitudinal and lateral movement of the frame upon the fork lift truck tines. Such longitudinal and lateral movement allows the lifting attachment to be centered over the load to be lifted and further allows the effective reach of the fork lift truck to be extended. Embodiments are described for use in lifting standardized load containers, loose elongated articles, or spooled articles having axial recesses.
Inventors
- 👤 James A Rumell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 05:10
CPC Classifications
B; B66; B66F; B66F9/00; B66F9/06; B66F9/075; B66F9/12; B66F9/18; B66F9/186
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
223 words
For use in lifting loads with a fork lift truck having at least one tine member of a given width and depth disposed in a substantially horizontal plane, and tine carriage means carrying the tine for vertical movement through a range of heights, a containerized cargo lifting attachment comprising the combination of frame means, channel means carried upon the frame means and slidably engageable with the truck tine member for allowing motion of the frame means in a longitudinal direction parallel to the length of the tine member, flexible link means connecting said attachment and said carriage means for limiting the motion of the attachment in said longitudinal direction between a first position wherein the tine member is relatively fully inserted into the channel means and a second position wherein the tine member is relatively withdrawn from the channel means to a predetermined extent, said channel means having an interior width substantially greater than the width of said tine member for allowing limited horizontal motion of the frame means on said tine in a direction transverse to the length of said tine, tapered cam members extending downwardly and outwardly from the outer periphery of said frame for camming the attachment into a predetermined location overlying the load to be lifted, and pickup means for selectively engaging and securing the load to the attachment.
Claim 2
Dependent Claim
223 words
For use in lifting loads with a fork lift truck having at least one tine member of a given width and depth disposed in a substantially horizontal plane, and tine carriage means carrying the tine for vertical movement through a range of heights, a containerized cargo lifting attachment comprising the combination of frame means, channel means carried upon the frame means and slidably engageable with the truck tine member for allowing motion of the frame means in a longitudinal direction parallel to the length of the tine member, flexible link means connecting said attachment and said carriage means for limiting the motion of the attachment in said longitudinal direction between a first position wherein the tine member is relatively fully inserted into the channel means and a second position wherein the tine member is relatively withdrawn from the channel means to a predetermined extent, said channel means having an interior width substantially greater than the width of said tine member for allowing limited horizontal motion of the frame means on said tine in a direction transverse to the length of said tine, tapered cam members extending downwardly and outwardly from the outer periphery of said frame for camming the attachment into a predetermined location overlying the load to be lifted, and pickup means for selectively engaging and securing the load to the attachment.
Claim 3
Dependent Claim
82 words
An article lifting attachment according to claim 1 wherein said pickup means includes at least four hook members mounted upon horizontal pivots for rotation in vertical planes adjacent the corners of said frame means for selective engagement with any of a plurality of load containers, each load container being provided with at least a corresponding number of hook-receiving recesses of a width substantially the same as the hook width, and hook pivoting means for pivoting the hooks into engagement with the recesses.
Claim 4
Dependent Claim
90 words
An article lifting attachment according to claim 2 wherein said hook pivoting means includes fluid cylinder means and hook rotating means located at each end of said frame means, each hook rotating means operating at least one guide hook within the line of sight of the fork lift truck operator, other load-engaging hooks connected to the hook rotating means for operation in unison with the guide hook so that the guide hook will engage the load only when all hooks connected to the hook rotating means will engage the load.
Claim 5
Dependent Claim
52 words
An article lifting attachment according to claim 1 wherein said pickup means includes winching means, and a flexible cable member wound upon the winching means, the ends of the cable means being disposed at each end of said frame means for engaging and securing a load to the attachment in a sling.
Claim 6
Dependent Claim
55 words
An article lifting attachment according to claim 1 wherein said pickup means includes a subframe mounted for telescoping motion upon the main frame, a pair of opposed hook members each mounted upon the subframe, and power means for telescopicly moving the subframe and the hooks carried thereupon into and out of engagement with a load.
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) | 1975-09-05 | 1976-03-06 | 1976-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-05 | 1980-03-06 | 1980-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-05 | 1984-03-06 | 1984-09-05 | $7700.00 | Window Closed / Lapsed |