Vacuum lifter
AssigneeBartholomy & Co.
InventorAdolf Schmidt
Life of this patent
Estimating the term…
Abstract
The invention concerns a vacuum lifter to transport loads with an adhesion surface and comprises at least one suction head with at least one projecting annular seal on its suction side, where the vacuum chamber(s) enclosed by the annular seal(s) is (are) hooked up to a main vacuum source and where additionally a battery-fed emergency vacuum source is provided which can be started by an emergency switch. In order to avert as much as possible crashes when using such a vacuum lifter, a pressure pickup (67) is associated with the or at least one of the vacuum chambers (13) and is coupled in such a way with a malfunction alarm (69) that when a preset limit pressure is exceeded during vacuum operation, the malfunction alarm (69) shall be turned ON.
Claims18
A vacuum lifter, comprising:
- a) a suction plate assembly;
- b) at least first and second seals projecting from sid assembly and defining therebetween a vacuum chamber;
- c) a main vacuum source operatively associated with said assembly for applying a vacuum to said vacuum chamber;
- d) an emergency vacuum source operatively associated with said assembly for selectively applying a vacuum to said vacuum chamber, said emergency vacuum source being electrically operable during application of the vacuum thereof;
- e) means operatively associated with said vacuum chamber for monitoring the vacuum therein;
- and
- f) means operatively associated with said monitoring means and with said emergency vacuum source for causing automatic electrical operation of said emergency vacuum source when said monitoring means detects in said vacuum chamber a vacuum pressure less than a preselected limit.
A vacuum lifter, comprising:
- a) a vacuum vessel comprising upper and lower plates and a peripheral wall extending therebetween;
- b) at least first and second resilient seals extending from and about said lower plate for defining therebetween a vacuum chamber;
- c) a main vacuum source and an emergency vacuum source, each of said sources communicating with the interior of said vessel for applying a vacuum thereto, wherein said emergency vacuum source is electrically operable during application of the vacuum thereof;
- d) a measurement pick-up operatively associated with said vessel for monitoring the vacuum therein;
- e) a vacuum supply extending between said vessel and said chamber for causing the vacuum inside said vessel to be selectively applied to said chamber;
- and
- f) control means operatively associated with said emergency vacuum source and said pick-up for causing automatic electrical operation of said emergency vacuum source when said monitoring means detects in said vacuum chamber a vacuum pressure less than a preselected limit.
Dependencies are inferred from the claim text.