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. 25, 1992
Filed:
Jun. 14, 1991
Thomas G Artzberger, Hartford, WI (US);
M-B-W Inc., Slinger, WI (US);
Abstract
A high velocity pneumatic device for excavating and removing material such as soil. The device includes a pressure tube having an inlet connected to a source of gas, such as air, under pressure and an outlet end connected to the distal end of a removal conduit. An annular member is secured in the distal end of the removal conduit and defines an annular chamber that communicates with the outlet end of the pressure tube. A plurality of first nozzles communicate with the chamber and face outwardly of the distal end of the removal conduit, while a plurality of second nozzles communicate with the chamber and face inwardly of the conduit. A manually operated valve member is disposed in the chamber and rotation of the valve member will selectively discharge air through the first nozzles to provide an excavating action, or through the second nozzles to provide an aspirating action for the removal of material or through both the first and second nozzles to create both an excavating and removal mode of operation.