Safety shut-down device for two-component sprayer systems
US4934598A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 7, 1989 |
| Grant date | Jun 19, 1990 |
| Priority date | — |
| Expiry date | Jul 7, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B12/085
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A component deficiency safety device for two-component sprayer systems comprised of pneumatic and hydraulic/mechanical detection and actuation members. The safety device is adapted for placement in the compressed air line of a spray system, in particular, in the compressed air line that powers the spray component air motors and pumps. A pneumatically controlled main valve cuts-off the compressed air to the air motors upon detection of a deficiency condition. The main valve is controlled through a pneumatic control input which is fed from the output of an OR valve having a start-up input and a normal operation/safety shut-down input. Individual pressure transducer/valve assemblies are associated with each component supply line. The outputs from these assemblies form separate inputs to an AND valve which, in turn, enables the main valve only when both transducer/valve assemblies indicate the presence of proper component supply pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.