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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-5752729-A, on 19 May 1998. 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-2026-000003214

Vacuum lifting device

Published
Permanent URL
Classification
Lifting, Positioning & Manipulation › Hoists and Cranes
Inventors
CROZIER CHRISTOPHER LUKE, LISTON BRIAN JOSEPH, STEWART KARL WILLIAM
Assignee
COMALCO ALU
Original source
US-5752729-A, the United States Patent and Trademark Office, 19 May 1998
Document SHA-256
0b85a7b52210c03e7bc9080e3f560ba2b335d291efd4efec8a76903057b71e4d

A vacuum lifting device that is particularly suitable for lifting refractory slabs used to line aluminum smelting cells incudes suction cups which engage the object to be lifted. A plurality of mechanical supports can be moved so that they extend at least partly underneath the object being lifted when the object is raised from the ground. The mechanical supports can hold the object in case of vacuum failure and improve the safety of the device. An optional automatic override can ensure that the mechanical supports are in the down position in the case of vacuum failure.

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Abstract

A vacuum lifting device that is particularly suitable for lifting refractory slabs used to line aluminum smelting cells incudes suction cups which engage the object to be lifted. A plurality of mechanical supports can be moved so that they extend at least partly underneath the object being lifted when the object is raised from the ground. The mechanical supports can hold the object in case of vacuum failure and improve the safety of the device. An optional automatic override can ensure that the mechanical supports are in the down position in the case of vacuum failure.

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Publication information

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Citation

OpenTechnical Publication OT-2026-000003214, “Vacuum lifting device,” published September 15, 2026 at 19:50:51 UTC, https://opentechnical.org/p/OT-2026-000003214.

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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.