Sprayer having pressure build-up discharge
US5522547A · kind A · utility
22Cited by
13References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 31, 1994 |
| Grant date | Jun 4, 1996 |
| Priority date | — |
| Expiry date | Oct 31, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B11/1011
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A two stage pressure build-up discharge valve assembly is mounted within the end of the discharge nozzle surrounded by a nozzle cap of a trigger actuated pump sprayer, and includes a spring biased discharge valve element having a high pressure throttle valve fixed to a second stage low pressure valve piston to provide a predetermined pressure threshold which when exceeded by fluid pressure generated by the pumping force applied during trigger actuation unseats immediately permitting the fluid pressure to act upon the low pressure secondary valve piston rapidly snapping the valve element to a full open flow position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.