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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-5080380-A, on 14 January 1992. 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-2026-000003407

Magnetic chuck

Published
Permanent URL
Classification
Manufacturing & Assembly Equipment › Machining Systems
Inventors
ARISHIRO MASATOSHI, NAKAGAWA TADAHIRO, TAZUKE SHIZUMA
Assignee
MURATA MANUFACTURING CO
Original source
US-5080380-A, the United States Patent and Trademark Office, 14 January 1992
Document SHA-256
9bac88c3a709a304224dc499caace4d413196e8e7af0ecf393756cc89f05ab25

A plurality of vertically extending cylinders are formed in the interior of a chuck body providing a chucking face on its lower surface. Pistons, in which permanent magnets are embedded, are vertically movably provided in respective ones of the cylinders. When compressed air is introduced into upper portions of the cylinders, the pistons are downwardly displaced so that the permanent magnets are relatively approached to the lower surface of the chuck body. Thus, the chucking face is supplied with magnetic force exceeding a prescribed level, to attract a holder holding electronic component chips, for example. When compressed air is introduced into lower portions of the cylinders, on the other hand, the pistons are upwardly displaced so that the permanent magnets are relatively separated from the lower surface of the chuck body. Thus, the chucking face is supplied with no magnetic force exceeding the prescribed level, so that the holder is separated from the chuck body.

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Abstract

A plurality of vertically extending cylinders are formed in the interior of a chuck body providing a chucking face on its lower surface. Pistons, in which permanent magnets are embedded, are vertically movably provided in respective ones of the cylinders. When compressed air is introduced into upper portions of the cylinders, the pistons are downwardly displaced so that the permanent magnets are relatively approached to the lower surface of the chuck body. Thus, the chucking face is supplied with magnetic force exceeding a prescribed level, to attract a holder holding electronic component chips, for example. When compressed air is introduced into lower portions of the cylinders, on the other hand, the pistons are upwardly displaced so that the permanent magnets are relatively separated from the lower surface of the chuck body. Thus, the chucking face is supplied with no magnetic force exceeding the prescribed level, so that the holder is separated from the chuck body.

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Publication information

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Citation

OpenTechnical Publication OT-2026-000003407, “Magnetic chuck,” published September 15, 2026 at 20:23:43 UTC, https://opentechnical.org/p/OT-2026-000003407.

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Terms

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.