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. 28, 1988
Filed:
Aug. 29, 1986
Forrest A Shook, Fenton, MI (US);
Gerard J DeSantis, Battle Creek, MI (US);
NLB Corporation, Wixom, MI (US);
Abstract
The method and apparatus for removing structural concrete from a road bed includes a vehicle having a frame on wheels movable along a road bed and mounting a pivotal hood having a lowered use position adjacent the road bed and a raised position. A pressure water manifold upon the frame is connected to a source of pressurized water up to 25,000 p.s.i. A feed carriage is reciprocally mounted within the hood and supports a rotating seal and shaft assembly having a body with a water inlet connected to the manifold and a power rotated tubular shaft journaled upon the body receiving pressure water for delivery to a depending nozzle block connected to and depending from the shaft. The nozzle block normally has one or a pair of angularly related elongated bores arranged at an acute angle to the vertical axis of the blaster shaft including converging nozzles whereby the sequential and pulverizing action of water in a rotating pattern impinges against the concrete of the road bed under high pressure and traveling back and forth over the road bed removes structural concrete to a required depth and further removes surface scale and corrosion from the concrete reinforcing bars without damage thereto.