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. 24, 1993
Filed:
Jan. 22, 1992
J Dewayne Allen, Paragould, AR (US);
Hugh L Adams, Bassett, AR (US);
Allen Engineering Corporation, Paragould, AR (US);
Abstract
A riding trowel used for concrete finishing includes a dolly wheel lifting system. The lifting system elevates the trowel out of contact with the concrete surface when transporting, adjusting, or maintenancing the trowel. The trowel comprises a rigid metallic frame normally offset from the concrete surface to be finished by a pair of downwardly projecting, bladed rotors. A pair of primary steering control levers is linked to the rotors beneath the frame for trowel operation. Each rotor assembly comprises a rotatable blade assembly depending downwardly into contact with the concrete surface. The wheel system comprises a cooperating pair of spaced apart, dolly wheel assemblies which are removably fitted to the front and back of the frame, so that the trowel may be pushed around for loading and unloading purposes in directions generally coincident with its longitudinal axis. Each dolly wheel assembly comprises an upright, extensible stanchion supported upon a rigid cross piece extending between a pair of spaced apart wheels. The stanchion mounts a pair of rigid, spaced apart rods that are adapted to be mated to suitable mandrels formed in the frame front and rear, about the trowel center of gravity. The stanchion comprises upper and lower tubular members that are telescoped together and which may be axially displaced or retracted by an internal screw jack to raise or lower the trowel. When the trowel is raised above the concrete surface, the blades are safely exposed for servicing.