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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-6305228-B1, on 23 October 2001. 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-2026-000003090

Pressure sensor device and suction release apparatus

Published
Permanent URL
Classification
Lifting, Positioning & Manipulation › Hoists and Cranes
Inventors
KAGAYA KOUKI, KIMURA MASAHITO, SATO YUTAKA
Assignee
MYOTOKU KK
Original source
US-6305228-B1, the United States Patent and Trademark Office, 23 October 2001
Document SHA-256
97ca19b56fd0737df6d9dc84525194ad60f52cb1cbda8bb63ffa5dd0a84bc8ef

When a suction/breakdown instruction signal is changed over from a high state to a low state, a vacuum generating electro-magnetic valve is turned on (the vacuum release electro-magnetic valve is closed). If the negative pressure in the pressure tube is equal to or greater than a determining value, suction breakdown confirmation output is turned on. When the delay time has lapsed from this time, the vacuum generating electro-magnetic valve is turned off. When the pressure in the pressure tube is smaller by a predetermined value than the suction determining value, the output of the suction breakdown confirmation is turned off. When the delay time has lapsed since the change-over time from the low state to the high state, the vacuum release electro-magnetic valve is turned on. When the positive pressure in the pressure tube is equal to or greater than the breakdown determining value, the output of the suction breakdown confirmation is set to the high state. When the breakdown time has passed from this time T 6, the vacuum release electro-magnetic valve is turned off.

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Abstract

When a suction/breakdown instruction signal is changed over from a high state to a low state, a vacuum generating electro-magnetic valve is turned on (the vacuum release electro-magnetic valve is closed). If the negative pressure in the pressure tube is equal to or greater than a determining value, suction breakdown confirmation output is turned on. When the delay time has lapsed from this time, the vacuum generating electro-magnetic valve is turned off. When the pressure in the pressure tube is smaller by a predetermined value than the suction determining value, the output of the suction breakdown confirmation is turned off. When the delay time has lapsed since the change-over time from the low state to the high state, the vacuum release electro-magnetic valve is turned on. When the positive pressure in the pressure tube is equal to or greater than the breakdown determining value, the output of the suction breakdown confirmation is set to the high state. When the breakdown time has passed from this time T 6, the vacuum release electro-magnetic valve is turned off.

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Publication information

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Citation

OpenTechnical Publication OT-2026-000003090, “Pressure sensor device and suction release apparatus,” published September 15, 2026 at 19:26:36 UTC, https://opentechnical.org/p/OT-2026-000003090.

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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.