Riding trowel for concrete finishing
US5238323A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 22, 1992 |
| Grant date | Aug 24, 1993 |
| Priority date | — |
| Expiry date | Jan 22, 2012 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04F21/247
- WIPO fieldCivil engineering
- WIPO sectorOther fields
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 cen…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.