US3764032A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Container handling device
Assignee: Doosan Bobcat North America Inc
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Filing: 1971-12-09
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Granted: 1973-10-09
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Expires: 1991-12-09
Abstract
Abstract An attachment device especially for lift trucks adapted to engage, lift and transport large freight containers. A support frame is provided for attachment to the lift carriage on the mast of a lift truck so that the horizontal portion of the frame extends forwardly of the truck. An elongated transverse lifting frame is suspended from corner portions of the horizontal portion of the support frame. A pair of oppositely disposed hydraulic cylinder actuators are connected at their one ends to the horizontal frame portion and extend diagonally in opposite directions for operative connection at their other ends to the lifting frame so that the lifting frame may be side shifted in either direction relative to the truck by energizing one or the other of the cylinders.
Inventors
- 👤 W Ward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:40
CPC Classifications
B; B66; B66F; B66F9/00; B66F9/06; B66F9/075; B66F9/12; B66F9/18; B66F9/186
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
109 words
A cargo container handling device comprising an upright frame, a pair of outwardly extending arms secured rigidly to the upper portion of the frame and forming a part of an elevated support frame, an elongated lifting frame having container engaging means for engaging fittings in a cargo container, means suspending said lifting frame from said support frame for limited swingable side shifting movement of the lifting frame, and a pair of diagonal connecting means connected to said support frame and to said lifting frame and extending in diagonally opposed directions therebetween for side shifting said lifting frame, said connecting means including a pair of diagonally oppositely extending hydraulic cylinders.
Claim 2
Dependent Claim
109 words
A cargo container handling device comprising an upright frame, a pair of outwardly extending arms secured rigidly to the upper portion of the frame and forming a part of an elevated support frame, an elongated lifting frame having container engaging means for engaging fittings in a cargo container, means suspending said lifting frame from said support frame for limited swingable side shifting movement of the lifting frame, and a pair of diagonal connecting means connected to said support frame and to said lifting frame and extending in diagonally opposed directions therebetween for side shifting said lifting frame, said connecting means including a pair of diagonally oppositely extending hydraulic cylinders.
Claim 3
Dependent Claim
86 words
A container handling device as claimed in claim 1 wherein said suspension means is flexible and support said lifting frame normally generally parallel to said support frame, said lifting frame being enabled by said flexible suspension means to engage a container which is located on a surface in non-parallel relation to the lifting frame, said suspension means being actuated arcuately with the lifting frame about the locations of connection of the suspension means on the support frame during side shifting movement by said diagonal connection means.
Claim 4
Dependent Claim
31 words
A container handling device as claimed in claim 1 wherein bracket means are connected to the upright frame for attaching the lift frame to the fork carriage of a lift truck.
Claim 5
Dependent Claim
25 words
A container haNdling device as claimed in claim 1 wherein the pair of diagonal connecting means projects a generally X-shaped configuration in a vertical plane.
Claim 6
Dependent Claim
52 words
A container handling device as claimed in claim 1 wherein said pair of hydraulic cylinders operate such that the effective force applied to the lifting frame which controls the side shift position thereof in either direction is only applied by the cylinder effective to exert a pulling force on the lifting frame.
Claim 7
Dependent Claim
65 words
A container handling device as claimed in claim 5 wherein a controlled fluid pressure is applied to the cylinder opposed to the cylinder operative to side shift the lifting frame such that a controlled force opposes side shifting as required to maintain a continuous taut condition of the diagonal connecting means, the side shifting cylinder being operative in retraction and the opposed cylinder in extension.
Claim 8
Dependent Claim
49 words
A container handling device as claimed in claim 1 wherein a relatively sharp angle is formed between the diagonal connecting means and the planes of the support and lifting frames, respectively, the force required to side shift the lifting frame being a function of the cosine of said angle.
Claim 9
Dependent Claim
60 words
A container handling device as claimed in claim 4 wherein each of said diagonally extending hydraulic cylinders is pivotally connected at one end to said support or lifting frame and at the opposite end to a common suspended connector element and a member connected to the suspended connector element and at a remote location to the lifting or support frame.
Claim 10
Dependent Claim
27 words
A container handling device as claimed in claim 8 wherein said connector element comprises a closed loop element, and each of said members comprises an adjustable turnbuckle.
Claim 11
Dependent Claim
71 words
A container handling device as claimed in claim 8 wherein remote ends of the opposed cylinders are pivotally connected to opposite side portions of the support frame, said pair of cylinders at all times applying opposed forces to said suspended connector element whereby to maintain the connector element in continuous tension during operation of the handling device and maintaining with said connector members an operator controlled position of the lifting frame.
Claim 12
Dependent Claim
23 words
A container handling device as claimed in claim 8 wherein the pair of diagonal connecting means are essentially coplanar in a vertical plane.
Claim 13
Dependent Claim
25 words
A container handling device as claimed in claim 1 wherein the pair of diagonal connecting means projects a generally V-shaped configuration in a vertical plane.
Claim 14
Dependent Claim
26 words
A container handling device as claimed in claim 1 wherein the pair of diagonal connecting means projects a generally inverted V-shaped configuration in a vertical plane.
Claim 15
Dependent Claim
27 words
A container handling device as claimed in claim 1 wherein the pair of diagonal connecting means projects a generally truncated inverted V-shaped configuration in a vertical plane.
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) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |