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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-4925225-A, on 15 May 1990. 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-2026-000003454

Vacuum lifting device for handling sheet material

Published
Permanent URL
Classification
Lifting, Positioning & Manipulation › Hoists and Cranes
Inventors
DOST JAMES A
Assignee
DOST INC
Original source
US-4925225-A, the United States Patent and Trademark Office, 15 May 1990
Document SHA-256
26ed03dc83874a5a3d5a5bf8b59477511cb42dd32bfb838b03a3731ff29850c0

A vacuum lifting device is attachable to a crane and operates to lift and subsequently release a sheet of material. The device comprises a support assembly including an eyebolt at its upper end for attachment to the hook, a threaded rod and a coupling nut securing the eyebolt and rod together. The lower end of the rod is connected to a vacuum pad. A cover member is fixedly secured to the eyebolt by entrapment between the coupling nut and the eyebolt to provide a protective housing. A vacuum pump is mounted within the housing. In operation, with the device resting on the sheet and with the vacuum release valve closed, actuation of the motor switch starts the motor and vacuum pump so as to create a vacuum in the vacuum chamber whereby the sheet adheres to the vacuum pad.

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Abstract

A vacuum lifting device is attachable to a crane and operates to lift and subsequently release a sheet of material. The device comprises a support assembly including an eyebolt at its upper end for attachment to the hook, a threaded rod and a coupling nut securing the eyebolt and rod together. The lower end of the rod is connected to a vacuum pad. A cover member is fixedly secured to the eyebolt by entrapment between the coupling nut and the eyebolt to provide a protective housing. A vacuum pump is mounted within the housing. In operation, with the device resting on the sheet and with the vacuum release valve closed, actuation of the motor switch starts the motor and vacuum pump so as to create a vacuum in the vacuum chamber whereby the sheet adheres to the vacuum pad.

1. Drawings

[0001]Sheet 1.

[0002]Sheet 2.

Publication information

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Citation

OpenTechnical Publication OT-2026-000003454, “Vacuum lifting device for handling sheet material,” published September 15, 2026 at 20:29:34 UTC, https://opentechnical.org/p/OT-2026-000003454.

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This record reproduces a document published elsewhere and is provided for reference and study. Rights in the original remain with its owner. See the publication policy.