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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-5816635-A, on 6 October 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-2026-000003201

Chock valve for a vacuum lifting device

Published
Permanent URL
Classification
Industrial Motion & Power Transmission › Fluid Power
Inventors
JANSSON RONNY
Assignee
LJUNGBLAD PETRE MASKIN AB
Original source
US-5816635-A, the United States Patent and Trademark Office, 6 October 1998
Document SHA-256
6daac344e1b495b74791701406876b3321100998610971b486c151193e37ecf0

A shock valve for vacuum lifting devices of the type incorporating a suspended flexible hose with suction head and connected to a vacuum source, wherein the lifting motion is effected in that a negative pressure in the hose causes the suction head to retain a load and to raise this due to the contraction of the hose caused by the internal negative pressure, and where the shock valve (6) is intended to prevent uncontrolled throwing movements when a load is dropped during prevailing negative pressure, whereby the shock valve (6) is connected to the interior of the hose adjacent the lower end thereof, and is provided with a body of inertia (16), which forms part of the shock valve, which body of inertia is connected to or constitutes members adapted for exposing large valve openings (11, 12), at momentary immobile condition of the body of inertia caused by the relative motion of the body of inertia in relation to the other parts of the shock valve, which occurs initially at a rapid acceleration of the hose, whereby the vacuum in the hose will cease very rapidly.

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Abstract

A shock valve for vacuum lifting devices of the type incorporating a suspended flexible hose with suction head and connected to a vacuum source, wherein the lifting motion is effected in that a negative pressure in the hose causes the suction head to retain a load and to raise this due to the contraction of the hose caused by the internal negative pressure, and where the shock valve (6) is intended to prevent uncontrolled throwing movements when a load is dropped during prevailing negative pressure, whereby the shock valve (6) is connected to the interior of the hose adjacent the lower end thereof, and is provided with a body of inertia (16), which forms part of the shock valve, which body of inertia is connected to or constitutes members adapted for exposing large valve openings (11, 12), at momentary immobile condition of the body of inertia caused by the relative motion of the body of inertia in relation to the other parts of the shock valve, which occurs initially at a rapid acceleration of the hose, whereby the vacuum in the hose will cease very rapidly.

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Publication information

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Citation

OpenTechnical Publication OT-2026-000003201, “Chock valve for a vacuum lifting device,” published September 15, 2026 at 19:48:31 UTC, https://opentechnical.org/p/OT-2026-000003201.

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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.