Patent ID: 8109548
Filing Date: 2012-02-07
Classification: B66C

Abstract:
1. A vacuum lifting device for lifting and handling of objects, comprising: a suction tube suspended from an upper end of the vacuum lifting device; a suction cup fitted at a lower end of the suction tube; a low pressure presenting flexible hose communicating with an interior of the suction tube, wherein the suction tube is extensible and contractible in response to a vacuum prevailing therein, a valve house protruding laterally from the suction cup, an interior of the valve house communicating with the interior of the suction tube, and a valve device with a hand grip rotatably mounted on the valve house for adjustable opening and closing of at least one aperture in a valve house wall by a regulating device actuated by the hand grip and comprising a closing member movable in relation to the aperture, wherein the regulating device is provided with a cam disc rotatable together with the hand grip, and the cam disc has a periphery configured to continuously displace the closing member an adjustable distance substantially perpendicular to a turning axis of the cam disc based on a turning angle of the hand grip, and wherein the closing member has a shutter shape covering the aperture in the valve house wall and has a hinge at one edge of the shutter and at an opposed edge has a shoulder against which the cam disc is arranged to act in an opening direction.