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:
Feb. 28, 1978
Filed:
Oct. 30, 1975
Krystian H Eyman, Warsaw, PO;
Politechnika Warszawska, Warsaw, PO;
Abstract
The invention relates to a method of obtaining mechanical periodic oscillations shocks, used particularly in vibrators for compaction of concrete mixes and other materials. A method according to the invention consisting in setting into rotary motion of at least two eccenters is characterized in that the eccenters are set into rotary motion with various speeds and phase displacements so that the sum of centrifugal forces in the set-up direction provides periodical oscillating motion in whose each period at least once all centrifugal forces of revolving eccenters, or the plurality of centrifugal forces coincide simultaneously with the set-up sense and operation direction, or directions parallel to each other.