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US 4,054,076 AGranted
Rolling cut type shear
AssigneeIshikawajima-Harima Jukogyo Kabushiki Kaisha
InventorSatoru Kumabe
Life of this patent
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Abstract
Disclosed is a rolling cut type shear wherein a downwardly curved upper blade is moved in such a way that the midpoint thereof in the longitudinal direction passes a cycloidal path, whereby the slip of the upper blade relative to a steel plate to be cut may be prevented.
Claims1
A rolling cut type shear wherein a lower blade is securely attached to a stand and a downwardly curved upper blade is attached to an upper blade holder which swings upon rotation of crankshafts, and
- the point on the upper blade holder which corresponds substantially to the midpoint of the upper blade in the longitudinal direction thereof and a shear frame which is the starting side of the cutting work are interconnected with a connecting rod which extends substantially in parallel with the lower blade through spherical bearings.
Dependencies are inferred from the claim text.