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US 5,605,397 AGranted
System for mixing cement and aggregate
AssigneePort-A-Pour, Inc.
InventorsNeil G. Oberg, Jerome J. Doherty
Life of this patent
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Abstract
A system and method for mixing particulate cement with mineral aggregate(s) so as to minimize the formation and escape of dust. The system involves dispensing aggregate(s) downwardly from a hopper and simultaneously dispensing the cement particles from a tube within the aggregate hopper above the hopper opening. The cement particles adhere to moisture on the surface of the aggregate(s).
Claims11
A method for mixing cement particles with aggregate having moisture on its surface, comprising the steps of:
- (a) providing an aggregate hopper having a bottom gate section with an opening therein;
- (b) providing an elongated tube for conveying particulate cement to a point within the aggregate hopper above said opening in said hopper;
- (c) dispensing said aggregate and cement though said opening in said hopper while simultaneously dispensing particulate cement from said elongated tube, wherein said particulate cement becomes adhered to the surface of said aggregate.
A system for mixing cement particles with aggregate having moisture on its surface, the system comprising:
- (a) an aggregate hopper having a bottom gate section with an elongated opening therein;
- (b) a cement hopper;
- (c) an elongated tube extending from said cement hopper to a point within the aggregate hopper above said opening in said aggregate hopper;
- wherein said tube is adapted to convey particulate cement from said cement hopper to said point beneath said opening.
1 more element
Dependencies are inferred from the claim text.