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. 11, 2003
Filed:
Jan. 29, 2001
Steve K. Yates, Scotland, PA (US);
Vern E. Martin, Shippensburg, PA (US);
Ingersoll-Rand Company, Woodcliff Lake, NJ (US);
Abstract
The eccentric assembly includes a shaft, first and second eccentric weights, and a member. The first and second eccentric weights are rotatably coupled to the shaft such that they generate vibrations which are transferred to the drum assembly of the vibration compacting machine when the shaft is rotated by a motor. The eccentric weights are also coupled to the shaft by the member which moves the eccentric weights between a first position where the eccentric weights are in phase and a second position where the eccentric weights are out-of-phase. When the eccentric weights are in phase the eccentric assembly generates a maximum moment of eccentricity about the shaft. As the rotational speed of the shaft increases to generate higher frequency vibrations, the eccentric weights move more out of phase reducing the moment of eccentricity generated by the rotating shaft.