The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 27, 1976
Filed:
Mar. 06, 1975
Anthony Clubley Armstrong, Abergavenny, WA;
Hy-Mac Limited, , WA;
Abstract
A power shovel is described in which the bucket describes a straight line loading movement under power from the luffing rams alone, different straight line movements being obtained by adjustment of the length of the lifting rams which form one side of a deformable quadrilateral. The movements may be level, sloping or vertical. The main arm is shorter than the backet arm so that the loading movements can start close to the chassis of the shovel and the quadrilateral is not deformed into a triangle. A parallelogram linkage for controlling the attitude of the bucket extends from the chassis so that changes in position of the main and bucket arms do not influence the attitude of the bucket.