Concrete aggregate collecting apparatus

Patent 5082553 Issued on January 21, 1992. Estimated Expiration Date:

December 18, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

2315281

2942731

Machine for salvaging waste concrete material
Patent #: 4127478
Issued on: 11/28/1978
Inventor: Miller

Concrete mixing plants with elevator wheel
Patent #: 4435081
Issued on: 03/06/1984
Inventor: Del Fabbro

Device for separating coarse and fine particles from ultrafines
Patent #: 4543180
Issued on: 09/24/1985
Inventor: Riker

Drum screening machine Patent #: 4636304
Issued on: 01/13/1987
Inventor: Hoppe

Inventor

Tanii, Masao

Application

No. 629143 filed on 12/18/1990

US Classes:

209/3, PRECEDENT PREPARATION OF ITEMS OR MATERIALS TO FACILITATE SEPARATION209/239, With weighting209/240, Feeding and discharging209/270, Drum209/288, Rotating209/369, Rotating209/379, Clearers366/18, By weight366/60, With specified actuating or control means366/601MOTOR CONTROL

Examiners

Primary: Hajec, Donald T.

Attorney, Agent or Firm

Wood, Phillips, Mason, Recktenwald & Van Santen

International Classes

B07B 001/22
B07B 001/50

Abstract

An aggregate collecting apparatus. A meter which measures the gross weight of the rotary drum is linked to the speed change gear for the rotary drum in such a manner as to be operationally connectable therewith so that the speed of rotation of the drum can be varied in accordance with variations in the amount of sludge charged in the drum. The upstream and downstream edges of a trommel in the rotary drum are intermittently twisted in each of opposite directions so that gravel clogging the trommel is automatically removed.