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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-4909493-A, on 20 March 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-2026-000003463

Cylinder type hydraulic clamp

Published
Permanent URL
Classification
Tools & Tooling › Clamping Tools
Inventors
YONEZAWA KEITARO
Assignee
KOSMEK KK
Original source
US-4909493-A, the United States Patent and Trademark Office, 20 March 1990
Document SHA-256
294758b610d93ce5831d253384953dc9cf597807de8c9de18461a86936655f74

A cylinder type hydraulic clamp having a clamping mechanism is adapted to be actuated by means of a hydraulic cylinder, and has a piston rod projected through the cylinder body of the hydraulic cylinder and is equipped at its leading end portion with the clamping means. The clamping means is arranged concentrically with the piston rod and is adapted to be resiliently urged by means of a contraction spring toward its contracted position to be pushed by means of an expansion slant cam toward its expanded position. At the time of the clamping actuation, when the clamping means is hydraulically actuated toward the cylinder body through the piston and the piston rod, the clamping means is first expanded diametrically by means of the expansion slant cam against the resilient force of the contraction spring and then a member to be clamped is fixedly pressed between the cylinder body and the clamping means expanded as mentioned above.

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Abstract

A cylinder type hydraulic clamp having a clamping mechanism is adapted to be actuated by means of a hydraulic cylinder, and has a piston rod projected through the cylinder body of the hydraulic cylinder and is equipped at its leading end portion with the clamping means. The clamping means is arranged concentrically with the piston rod and is adapted to be resiliently urged by means of a contraction spring toward its contracted position to be pushed by means of an expansion slant cam toward its expanded position. At the time of the clamping actuation, when the clamping means is hydraulically actuated toward the cylinder body through the piston and the piston rod, the clamping means is first expanded diametrically by means of the expansion slant cam against the resilient force of the contraction spring and then a member to be clamped is fixedly pressed between the cylinder body and the clamping means expanded as mentioned above.

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Publication information

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Citation

OpenTechnical Publication OT-2026-000003463, “Cylinder type hydraulic clamp,” published September 15, 2026 at 20:31:03 UTC, https://opentechnical.org/p/OT-2026-000003463.

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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.