Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Kenny Y. Tajiri0
Raymond Y. Tajiri0
Date of Patent
September 15, 2009
0Patent Application Number
115304310
Date Filed
September 8, 2006
0Patent Primary Examiner
Patent abstract
A hydraulically-operated ripper tool is mounted as an attachment on a hydraulic arm of a carrier or excavator and used in a method for demolition of large metal walled structures such as storage tanks in a very short time. The ripper tool has a concave, sharp inner edge and is operated by the hydraulic aim in reciprocation so as to provide a shearing force to cut quickly through metal walls in “can-opener” fashion. The ripper tool is employed for making long vertical cuts into the tank wall from top to bottom, so that a series of vertical cuts can be made to weaken a side of the tank and allow the top of the tank structure to be brought down.
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