US3822803A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Material handling equipment
Assignee: R Barker & Co Ltd
•
Filing: 1973-03-22
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Granted: 1974-07-09
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Expires: 1993-03-22
Abstract
Abstract An attachment for a lifting vehicle, comprising a rear frame having means for attachment to a vehicle, a mid-frame rotatably mounted on the rear frame for rotation relative thereto about an axis substantially perpendicular to the plane of the rear frame, a front plate hinged at one side thereof to the mid-frame, means for opening and closing the hinge to pivot the front plate away from and towards the mid-frame, means for moving the hinge longitudinally of the mid-frame from side to side thereof and mounting means at both opposite longitudinal edges of the front plate to which material handling members may be attached.
Inventors
- 👤 R Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:34
CPC Classifications
B; B66; B66F; B66F9/00; B66F9/06; B66F9/075; B66F9/12; B66F9/125; B66F9/14; B66F9/147; B66F9/149; B66F9/16; B66F9/20; B66F9/205
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
104 words
An attachment for a lifting vehicle, comprising a rear frame having means for attachment to a vehicle, a mid-frame rotatably mounted on the rear frame for rotation relative thereto about an axis substantially perpendicular to the plane of the rear frame, a front plate hinged at one side thereof to the mid-frame, means for opening and closing the hinge to pivot the front plate away from and towards the mid-frame, means for moving the hinge longitudinally of the mid-frame from side to side thereof and mounting means at both opposite longitudinal edges of the front plate to which material handling members may be attached.
Claim 2
Dependent Claim
104 words
An attachment for a lifting vehicle, comprising a rear frame having means for attachment to a vehicle, a mid-frame rotatably mounted on the rear frame for rotation relative thereto about an axis substantially perpendicular to the plane of the rear frame, a front plate hinged at one side thereof to the mid-frame, means for opening and closing the hinge to pivot the front plate away from and towards the mid-frame, means for moving the hinge longitudinally of the mid-frame from side to side thereof and mounting means at both opposite longitudinal edges of the front plate to which material handling members may be attached.
Claim 3
Dependent Claim
28 words
An attachment according to claim 1 in which the attachment means are means for securing the rear frame to the standard carriage plate of a fork lift truck.
Claim 4
Dependent Claim
66 words
An attachment according to claim 1 in which first fluid-operated means are mounted on the rear frame, rack sections are operatively connected to said first fluid operated means to be driven longitudinally across the rear frame, a pinion engages said rack sections and is secured to said mid-frame whereby longitudinal movement of said rack sections causes said rotation of said mid-frame relative to said rear frame.
Claim 5
Dependent Claim
47 words
An attachment according to claim 3 in which the means for opening and closing the hinge are second fluid-operated rams having cylinders pivotally secured to a carrier plate movable longitudinally of the mid-frame from side to side thereof, and piston rods pivotally secured to the front plate.
Claim 6
Dependent Claim
21 words
An attachment according to claim 4 in which the carrier plate is moved longitudinally of the mid-frame by third fluid-operated rams.
Claim 7
Dependent Claim
103 words
An attachment according to claim 5 in which the third fluid-operated rams comprise two oppositely extending rams one above and longitudinally offset from the other, each having a cylinder secured to the mid-frame and a piston rod carrying a pulley at its free end, and a flexible element extends from an anchorage above the upper cylinder, around the pulley of the upper piston rod, between the levels of the piston rods, around the pulley of the lower piston rod and to an anchorage below the lower cylinder, the flexible element being secured to the carrier plate in its run between the two pulleys.
Claim 8
Dependent Claim
62 words
An attachment according to claim 5 in which the pinion is fixed to a hollow shaft rotatably mounted about a pin secured to the rear frame, and fluid for the second and third fluid-operated rams is transmitted from conduits on the rear plate to conduits on the mid-frame by cOmmunicating axial and radial channels formed in the pin and the hollow shaft.
Claim 9
Dependent Claim
47 words
An attachment according to claim 5 in which supply of fluid to the second and third fluid-operated rams is controlled so that whenever there is pivotal movement of the front plate away from the mid-frame there is simultaneous longitudinal movement of the carrier plate on the mid-frame.
Claim 10
Dependent Claim
83 words
An attachment according to claim 1 in which the mounting means for the load handling members include hinges to which the load handling means are secured so that when the hinges are on the uppermost edge of the front plate the load handling members hang down substantially parallel to and in contact with the front plate, and when the hinges are on the lowermost edge of the front plate the load handling members project forwardly from the front plate and substantially normal thereto.
Claim 11
Dependent Claim
43 words
An attachment according to claim 9 in which the pivotal axes of the hinges are inclined to the longitudinal edges of the front plate so that load handling members mounted on the hinges will not contact each other when moving about their hinges.
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) | 1977-07-08 | 1978-01-07 | 1978-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-08 | 1982-01-07 | 1982-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-08 | 1986-01-07 | 1986-07-09 | $7700.00 | Window Closed / Lapsed |