Water-driven oscillating monitor
US4789101A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 4, 1987 |
| Grant date | Dec 6, 1988 |
| Priority date | — |
| Expiry date | Mar 4, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B3/16
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A water-driven monitor is provided as a stand-by pre-aimed fire fighting device installed at a fixed location for fire protection of a structure or equipment, such as aircraft, in a hanger structure. The monitor is oscillated by providing a diversion of a minor flow of the water or water/foam to be discharged from the monitor, to reciprocate an annular piston in an annular cylinder in up and down directions. A pair of concentric barrel cams having helical cam tracks therein and a cam ring with attached cam rollers interconnect a fixed base assembly containing the piston and cylinder and a water or water/foam discharge assembly, such that linear piston motion includes oscillatory motion which is transferred to the discharge assembly. A four-way spool valve controls fluid flow to opposite sides of a piston head and a toggle action shuttle actuates the valve spool to reverse the piston movement and the direction of discharge tube oscillation. A series of four torsion springs, two at each end of the shuttle, provide stored spring energy for the toggle action of the shuttle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.