US3738512A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Material handling equipment
Assignee: R Barker & Co Ltd
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Filing: 1972-02-03
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Granted: 1973-06-12
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Expires: 1992-02-03
Abstract
Abstract An attachment for a lifting vehicle, particularly a fork lift truck, comprising a rear frame having means for attachment to a vehicle; a mid-frame; a first hinge between the rear frame and mid-frame; means for opening the first hinge to pivot the midframe away from and towards a first lateral side of the attachment, and for closing the first hinge; means for moving the first hinge laterally back and forth across the rear frame; a front plate having attachment points for one or more material handling members; a second hinge between the mid-frame and the front plate; means for opening the second hinge to pivot the front plate away from the mid-frame and towards a second lateral side of the attachment, and for closing the second hinge; and means for moving the second hinge laterally back and forth across the mid-frame. The load handling member may thus be moved to work in a straight-ahead position or a position pointing to either side of a vehicle to which the attachment is fitted.
Inventors
- 👤 G Marsden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:32
CPC Classifications
B; B66; B66F; B66F9/00; B66F9/06; B66F9/075; B66F9/12; B66F9/14; B66F9/147; B66F9/149
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
149 words
An attachment for a lifting vehicle, particularly a fork lift truck, comprising a rear frame having means for attachment to a vehicle; a mid-frame; a first hinge between the rear frame and the mid-frame; means for opening the first hinge to pivot the mid-frame away from and towards a first lateral side of the attachment, and for closing the first hinge; means for moving the first hinge laterally back and forth across the rear frame; a front plate having attachment points for one or more material handling members; a second hinge between the mid-frame and the front plate; means for opening the second hinge to pivot the front plate away from the mid-frame and towards a second lateral side of the attachment, and for closing the second hinge; and means for bodily shifting the second hinge laterally back and forth across and along the longitudinal axis of the mid-frame.
Claim 2
Dependent Claim
149 words
An attachment for a lifting vehicle, particularly a fork lift truck, comprising a rear frame having means for attachment to a vehicle; a mid-frame; a first hinge between the rear frame and the mid-frame; means for opening the first hinge to pivot the mid-frame away from and towards a first lateral side of the attachment, and for closing the first hinge; means for moving the first hinge laterally back and forth across the rear frame; a front plate having attachment points for one or more material handling members; a second hinge between the mid-frame and the front plate; means for opening the second hinge to pivot the front plate away from the mid-frame and towards a second lateral side of the attachment, and for closing the second hinge; and means for bodily shifting the second hinge laterally back and forth across and along the longitudinal axis of the mid-frame.
Claim 3
Dependent Claim
31 words
An attachment according to claim 1 in which the means for attachment to a vehicle comprise means for securing the rear frame to the carriage plate of a fork lift truck.
Claim 4
Dependent Claim
40 words
An attachment according to claim 1 and including first and second locks for locking respectively the mid-frame to the rear frame at the second lateral side, and for locking the front plate to the mid-frame at the first lateral side.
Claim 5
Dependent Claim
42 words
An attachment according to claim 3 in which the locks are linked to the hinge opening means so that the first lock is released before the first hinge is opened and the second lock is released before the second hinge is opened.
Claim 6
Dependent Claim
51 words
An attachment according to claim 4 in which each hinge is mounted on a carrier plate movable laterally across the respective frame, each hinge opening means comprises a pivotally mounted hydraulic ram operating between the respective carrier plate and the mid-frame or front plate respectively, and the locks are hydraulically operated.
Claim 7
Dependent Claim
45 words
An attachment according to claim 5 in which each lock comprises a catch member biased into locking engagement with the mid-frame or front plate respectively and hydraulically operated means for moving the catch against the biasing force to move said catch out of locking engagement.
Claim 8
Dependent Claim
88 words
An attachment according to claim 5 in which each ram comprises a cylinder pivoted to the carrier plate and a piston with a piston rod pivoted to the mid-frame or front plate respectively, and each cylinder is pivoted by a stem fitting between two sections of a clevis and a hinge pin passing through the stem and the clevis sections, the hinge pin being formed with passages for feeding hydraulic fluid from bores formed in the clevis sections to bores formed in the cylinder stem and vice versa.
Claim 9
Dependent Claim
54 words
An attachment according to claim 5 in which the carrier plate of the first hinge is mounted for lateral movement over the rear frame by rollers journalled at the upper and lower parts of the carrier plate and running respectively on upper and lower faces of upper and lower tracks on the rear frame.
Claim 10
Dependent Claim
37 words
An attachment according to claim 8 in which the upper rollers have flanges engaging the upper track on the front face thereof and the lower rollers have flanges engaging the lower track on the rear face thereof.
Claim 11
Dependent Claim
57 words
An attachment according to claim 8 in which the upper and lower parts of the carrier plate have further rollers journalled thereon with axes of rotation at right angle to said rollers, the upper further rollers engaging the rear face of the upper track and the lower further rollers engaging the front face of the lower track.
Claim 12
Dependent Claim
55 words
An attachment according to claim 5 in which the carrier plate of the second hinge has slides engaging slideways on the front face of the mid-frame to allow the carrier plate to slide laterally on the mid-frame, the slide and slideways interlocking to hold the carrier plate out of any further contact with the mid-frame.
Claim 13
Dependent Claim
158 words
An attachment according to claim 5 in which the means for moving the hinges laterally back and forth across the respective ones of the rEar frame and mid-frame each comprise fixed pairs of hydraulic rams, each pair comprising a first hydraulic ram having a cylinder fixed at one lateral side of the plate and extending substantially half-way across the frame, a second hydraulic ram having a cylinder fixed at the other lateral side of the frame below the level of the cylinder of the first hydraulic ram and extending substantially halfway across the frame, each ram having a piston and a piston rod extendable in opposite direction across the frame, the piston rods each carrying a pulley at their free end, and a chain anchored at its ends adjacent to the ends of the cylinders nearer the center of the frame and extending around the pulleys and secured in its run between the pulleys to the carrier plate.
Claim 14
Dependent Claim
58 words
An attachment according to claim 12, in which is such that pivotal movement of the mid-frame away from the rear frame occurs simultaneously with lateral movement of the first hinge across the rear frame, and that pivotal movement of the front plate away from the mid-frame occurs simultaneously with lateral movement of the second hinge across the mid-frame.
Claim 15
Dependent Claim
87 words
An attachment according to claim 13 wherein said simultaneous pivotal movement of the mid-frame and lateral movement of the first hinge is effected by simultaneous extension of the respective pivotally mounted hydraulic ram, and an appropriate one of the respective fixed pair of hydraulic rams, and said simultaneous pivotal movement of the front plate and lateral movement of the second hinge is effected by simultaneous extension of the other respective pivotally mounted hydraulic ram and an appropriate one of the other respective fixed pair of hydraulic rams.
Claim 16
Dependent Claim
74 words
An attachment according to claim 14 and including sequence valves for delaying application of fluid under pressure until the pressure is the full system pressure, said sequence valves controlling fluid flow to extend the pivotally mounted rams and controlling fluid flow to those ones of the respective pairs of fixed rams which extend to give lateral movement of the mid-frame and front plate respectively from their normal positions directly ahead of the rear frame.
References Cited (Backward Citations)
US2945610A
Cited
US3659733A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |