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:
Jun. 02, 1987
Filed:
Dec. 27, 1985
Applicant:
Inventor:
Jack J Kolle, Seattle, WA (US);
Assignee:
Flow Industries, Inc., Kent, WA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
E21C / ;
U.S. Cl.
CPC ...
299 16 ; 299 20 ; 102313 ; 102328 ;
Abstract
A technique for fragmenting rock or other relatively hard and/or compact material without the use of explosives is disclosed herein. In accordance with this technique, an elongated, blind opening is provided in the rock or other material to be fragmented and a pulse of water having a relatively high peak pressure and a relatively rapid rise time is directed into the elongated opening without the use of explosives to produce the pulse, whereby to produce a shock wave in the rock or other material sufficient to fragment it. In an actual embodiment, this explosion free pulse of water has a peak pressure of about 80,000 psi and a rise time of about one millisecond.