Ultrasonic fork height measuring apparatus
US4280205A · kind A · utility
6Cited by
4References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 16, 1979 |
| Grant date | Jul 21, 1981 |
| Priority date | — |
| Expiry date | Jul 16, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66F9/0755
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The height to which the forks of a lift truck are raised is measured by an ultrasonic height measuring arrangement including a downward facing transmitting transducer, positioned on the truck platform in fixed position with respect to the forks, and a downward facing ultrasonic receiving transducer which receives ultrasonic acoustic energy waves reflected by an upward facing parabolic reflector. The receiving transducer is positioned in a casing substantially at the focal point of the parabolic reflector and is mounted by means of springs which provide vibration isolation between the casing and the transducer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.