US 11,795,011 B2
Vacuum lifting arrangement and method for providing a such
John Carlsson, Vessigebro (SE)
Assigned to TAWI AB, Kungsbacka (SE)
Appl. No. 17/792,075
Filed by TAWI AB, Kungsbacka (SE)
PCT Filed Jan. 13, 2021, PCT No. PCT/SE2021/050015
§ 371(c)(1), (2) Date Jul. 11, 2022,
PCT Pub. No. WO2021/145815, PCT Pub. Date Jul. 22, 2021.
Claims priority of application No. 2050020-3 (SE), filed on Jan. 14, 2020.
Prior Publication US 2023/0104207 A1, Apr. 6, 2023
Int. Cl. B65G 47/91 (2006.01); B66C 1/02 (2006.01)
CPC B65G 47/91 (2013.01) [B66C 1/0293 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A vacuum lifting apparatus comprising:
a vacuum pump;
a valve arrangement;
a support structure; and
a flexible lifting tube comprising a suction foot, wherein the vacuum pump is connected to the valve arrangement and to the flexible lifting tube, wherein the valve arrangement is configured to extend and retract the flexible lifting tube, the valve arrangement is configured to separate from the suction foot, between the vacuum pump and the suction foot, wherein the suction foot comprises a movable valve plate configured to close against a seal during operation of the vacuum pump when no load is attached to the suction foot.