Method and means for measuring dynamic and static air pressure on a ground surface beneath a lawn mower system
US5929339A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 25, 1998 |
| Grant date | Jul 27, 1999 |
| Priority date | — |
| Expiry date | Feb 25, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L15/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of measuring dynamic air pressure on a ground surface beneath a lawn mower system which is comprised of a rotatable horizontal blade with a deck unit having a closed top with side walls and an open bottom involves placing the mower on an elevated horizontal platform located in spaced relation to the deck. The blade is then rotated at a speed at which the blade normally would cut grass. Measurements are then made of the air pressure at a plurality of locations adjacent the platform to determine if the air pressure at such locations is such that a blade of grass at each location would be lifted or depressed with respect to the platform. The apparatus for performing the aforesaid method has a horizontal platform with a plurality of apertures therein. The platform is adapted to support a lawn mower deck with a rotatable horizontal blade mounted therein. A plurality of air pressure sensors are mounted in spaced locations on the platform and are located in the lower end of hollow extending tubular pressure taps. The sensors are operatively connected to a monitor to permit the dynamic air pressure to be read adjacent each aperture when a lawn mower with a deck and a rotating blad…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.