Variable eccentricity mass for mechanical shakers

US4776156A · kind A · utility

Assignee

• The United States of America, as represented by the Secretary of Agriculture · US

Inventors

• Galen K. Brown · Okemos, US
• Henry A. Affeldt · East Lansing, US
• Thomas Esch · Kaarst, DE
• Richard J. Wolthuis · Haslett, US

Key dates

• Filing date: May 13, 1987
• Grant date: Oct 11, 1988
• Expiry date: May 13, 2007

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A01D46/26
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

Means to control imbalance of an eccentric mass connected to a rotating shaft in a shaker housing wherein the eccentric mass is adjacent to but is not fixedly connected to the shaft, wherein a first end of the mass is connected to a mass moving means which can move one end of the mass to a plurality of different distances from the rotating shaft, and is able to hold that end of the mass at each of these distances during rotation; wherein a second end of the mass is restrained from centrifugal movement during rotation of the shaft.