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:
Mar. 24, 1981
Filed:
Dec. 18, 1978
Hugo S Ferguson, Averill Park, NY (US);
Frank E Raymond, Grafton, NY (US);
Duffers Associates, Inc., Poestenkill, NY (US);
Abstract
A cross flow rotary mower has a rotor with horizontal outer cutting edges and upwardly extending blower vanes. A conduit having upper, lower and side walls cooperates with the rotor to form a cross flow blower. The rear semi-circle of travel of the rotor is within the conduit. The inlet opens forwardly and has a lateral extent preferably as great as the diameter of the tip circle of the rotor. The cutting edges extend forward of the lower wall, and preferably the lower wall extends to the cutting edges. An extension of the upper wall extends forwardly beyond the tip circle with front and side skirt portions. Means for producing and strengthening vortex air flow are described, and also inlet air flow control vanes. A number of rotors and conduit arrangements with advantageous features are described. These include dual blower vane arrangements. Force-controlled retractable blades mounted on a blade carrier are described which avoid undue cutting forces and also enable the use of thin blades requiring no sharpening.