Lawn mower blade control apparatus
US4035994A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 27, 1975 |
| Grant date | Jul 19, 1977 |
| Priority date | — |
| Expiry date | May 27, 1995 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01D2101/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Mounting and control apparatus for a driven element such as a lawn mower blade mounted coaxially on an engine drive shaft, in an arrangement in which, under control of a deadman lever, the driven element is normally de-clutched from the shaft and stopped by a brake, as when the driving engine is idled, and for operation is released by the brake and clutched by a centrifugal clutch to the drive shaft, as when the engine is speeded up. The compact nested assembly includes a driven drum element having an outer cylindrical brake and clutch drum and an inner bearing ring which lies within the axial length of the drum and is mounted on the outer race of a ball bearing carried by a reduced-diameter bearing sleeve on a main hub fixed to the motor shaft. A clutch carrier plate on the hub carries centrifugal shoes engageable with the inside of the drum and partially nested between it and the bearing ring. The hub carries a flywheel when the engine is designed to depend on the mower blade for flywheel mass. A protective bowl about the assembly forms a mounting platform for an arcuate brake-mounting plate which supports an elongated brake band about the drum. One band end straddles and is anch…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.