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:
Aug. 07, 1990
Filed:
May. 22, 1989
Raj Paul, Calgary, CA;
Esso Resources Canada Limited, Calgary, CA;
Abstract
A bucket wheel assembly for excavating solid material from the ground which can be slurried with water has a series of buckets mounted on a framework rotatable about a substantially horizontal axis, the buckets, being secured to the framework at spaced positions around the periphery, and each bucket having a leading edge portion engagable with the ground as the framework rotates to cause material to be scooped from the ground into the bucket. Sets of nozzles are mounted around the framework, each set of nozzles being located between an adjacent pair of buckets and spaced in the direction of movement of the buckets from the leading edge portion of a following bucket. A rotary valve is connected to the nozzles and to a source of liquid under pressure. The rotary valve is operated by rotation of the framework to cause liquid under pressure to be selectively supplied from the source of liquid under pressure to each set of nozzles in turn when the set of nozzles and its following bucket are approaching the ground to cause liquid from the set of nozzles to impinge on the ground and form a slurry of the material which is subsequently scooped into a following bucket.