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:
Dec. 12, 1995
Filed:
Dec. 09, 1993
Eitan Zehavi, Kiriat Tivon 36000, IL;
David Chiel, Afula Ilit, IL;
Other;
Abstract
A tree-shaking apparatus that includes a pair of vibration units whose eccentric rotators turn at identical speeds but in opposite directions. During operation, rotation of the eccentric members is coordinated by a controller such that their asymmetric portions align at two diametrically opposed points but lie precisely out of phase during the remainder of the rotation cycle. This action causes the tree to shake along a single axis, specified by the chosen alignment of the rotators, with vibratory forces along all other directions canceling out. A controller systematically alters the direction and frequency of shaking and monitors the resulting change in vibration amplitude, selecting, as a final shaking axis and frequency, those which correspond to the largest amplitude.