Safety apparatus determining whether a detected presence is a work piece or a human
US5428279A · kind A · utility
6Cited by
10References
7Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Mar 2, 1994 |
| Grant date | Jun 27, 1995 |
| Priority date | — |
| Expiry date | Mar 2, 2014 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16P3/144
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A safety apparatus wherein a sensor (10.sub.n through 15.sub.n, 16) for transmitting object (M) detection information as a reduction in the output signal energy, is used as a human detection sensor, while a sensor (21-26) for transmitting object (M) detection information as an increase in the output signal energy is used as a work piece detection sensor, and drive of a mechanical moving portion is permitted only when the logical OR output of both sensors has a logical value of "1" corresponding to the high energy condition, thereby reliably ensuring excellent operator safety in a fail-safe manner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.