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:
Nov. 24, 1998
Filed:
May. 06, 1996
Daniel P Strauser, Elgin, IL (US);
Robert E Field, Newark, OH (US);
Elgin Sweeper Company, Elgin, IL (US);
Abstract
A street sweeper is provided including a vacuum pick-up head having a relatively low noise level and high sweeping efficiency resulting from the careful control of the velocity and direction of the air flow. In order to control the air flow, the internal contour of the pick-up head is optimized to accommodate the streamline flow pattern to minimize turbulence and boundary layer separation. The cross sectional area of the internal contour of the pick-up head is designed to be substantially constant or slightly converging. A support assembly for supporting a nozzle assembly is provided which minimizes damage to the pick-up head and minimizes infiltration into the pick-up head. A suction tube is also provided which minimizes the noise level and increases the efficiency of the pick-up head and the fan.