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This is a record of a document published elsewhere, first published by the United States Patent and Trademark Office, as US-4822237-A, on 18 April 1989. OpenTechnical did not first disclose it. The identifier, hashes and timestamps below record what this library served and when, not when the material became public. View the original.

OT-2026-000003488

Extended reach materials handling apparatus

Published
Permanent URL
Classification
Lifting, Positioning & Manipulation › Lift Tables and Positioners
Inventors
FRANK JOHN H, MEYER JOSEPH A
Assignee
GRADALL COMPANY
Original source
US-4822237-A, the United States Patent and Trademark Office, 18 April 1989
Document SHA-256
549111a1e89e5aeb7aa2005325b8d5756114738d94d708ff6349121510bdcebd

Extended-reach lift apparatus for remote accessing of low-clearance areas is provided. The apparatus includes a vehicle whose frame supports a vertically pivotable telescoping boom which is elevatable by means of hydraulic rams. An extended tilt head is provided on the free end of the boom which includes parallel upper and lower link members of equal length. A work implement support having a discrete work implement tilting cylinder is attached to the remote ends of the upper and lower links of the tilt head. A hydraulic cylinder extending between the boom and the lower link of the tilt head provides separate tiltability of the tilt head while the design of the tilt head mechanically assures the maintenance of the attitude of the work implement without requiring additional hydraulic compensation during such tilting.

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Abstract

Extended-reach lift apparatus for remote accessing of low-clearance areas is provided. The apparatus includes a vehicle whose frame supports a vertically pivotable telescoping boom which is elevatable by means of hydraulic rams. An extended tilt head is provided on the free end of the boom which includes parallel upper and lower link members of equal length. A work implement support having a discrete work implement tilting cylinder is attached to the remote ends of the upper and lower links of the tilt head. A hydraulic cylinder extending between the boom and the lower link of the tilt head provides separate tiltability of the tilt head while the design of the tilt head mechanically assures the maintenance of the attitude of the work implement without requiring additional hydraulic compensation during such tilting.

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Publication information

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Citation

OpenTechnical Publication OT-2026-000003488, “Extended reach materials handling apparatus,” published September 15, 2026 at 20:33:59 UTC, https://opentechnical.org/p/OT-2026-000003488.

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