Balance arm for flat weighing machines
AssigneeBizerba-Werke Wilhelm Kraut GmbH & Co. KG
InventorsErnst Kuhnle, Josef Schwarz
Life of this patent
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Abstract
A balance arm for flat weighing machines has a rigid frame formed by girder-section rails extending between side beams. A pair of knife-edges are attached to each rail to extend parallel to the longitudinal axis thereof with the sharp edges of each pair of knife-edges in alignment. The rails are secured to the side beams such that all the sharp edges lie in a common plane. The configuration of the rails enables all the knife-edges to be precision ground on a common grinding machine after attachment to the inside of the rails and before the side beams are attached to the rails.
Claims4
Balance arm for flat weighing machines comprising two spaced side beams, at least two girder section rails each having a U-shaped cross-section along its entire length and open ends, said U-shaped cross-section comprising a base and two spaced sides extending at right angles with respect to said base, the open ends of said rails being secured to said side beams by screw means to form a rigid frame, in which said rails are arranged in spaced parallel relation, and a pair of knife-edges attached to the base of each said rail between said sides such that each knife-edge extends parallel to the longitudinal axis of the respective rail, wherein each knife-edge has a sharp edge and the sharp edges of the knife-edges of each pair are in alignment, and wherein each rail is secured to the side beams such that the sharp edges of all the knife edges lie in a common plane.
Dependencies are inferred from the claim text.