Rotary-type lawnmower
US4382356A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 5, 1981 |
| Grant date | May 10, 1983 |
| Priority date | — |
| Expiry date | Aug 5, 2001 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01D34/4168
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A rotary-type lawnmower having unique non-metallic cutting elements carried on a rotating disc-like head with a smooth rim and lower exposed surface without significant projections or recesses capable of inflicting injury to human parts. The lawnmower produces a smooth and even cut equal to rotary metal-blade machines. The cutting elements are tapered pins extruded from flexible polymeric material such as Nylon.RTM. polymer. Each cutting pin has a first portion providing supporting surfaces and an enlargement for securing the pin into the head. The cutting pins extend from the head in a tapered free-traveling end portion to a cutting end located at a cutting plane adjacent the ground's surface. The cutting pins are slidably inserted and removed from the disc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.