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:
May. 12, 1992
Filed:
Jan. 14, 1991
Ary van der Lely, Maasland, NL;
C. van der Lely N.V., Maasland, NL;
Abstract
A mowing machine comprising a main frame has a plurality of driving units and intermediate pieces which are mounted alternately on a tie member. The tie member is under tension thereby pressing the driving units and the intermediate pieces together to provide a main frame which is substantially rigid. The driving units have cutting units with flexible hoods which are driven by a drive shaft through beveled gearing. The drive shaft is an elongated resilient rod of narrow diameter which is capable of substantial torsional displacement before its yield point is reached. The direction of rotation of each cutting unit can be reversed by removing the gear received on the driving shaft and turning it around. A hood is disposed on the cutting member and has peripheral fastening bolts for securing thereto oppositely disposed cutting knifes, the fastening bolts being received in depressed areas in peripheral portions of the hood having upwardly extending portions which define between them such depressed areas, the upwardly extending portions being disposed generally radially towards a raised central portion of the hood whereby the fastening bolts for the cutting knifes are protected by the upwardly extending portions from material that is cut by the mowing machine which passes over the hood and other objects which are encountered by the upper portion of the hood.