Controlling mechanism for sprinkler system
US4203459A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 20, 1978 |
| Grant date | May 20, 1980 |
| Priority date | — |
| Expiry date | Jan 20, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86895
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
Automatic valve for controlling the passage of an in-feed pressure fluid to be delivered in predetermined quantities into one receiver. After delivery of the predetermined quantity, the flow to the one receiver is cut off and the flow is directed to the next receiver. The receivers may be sequential nozzles of a sprinkler system. The automatic control valve comprises two tandem-joined piston cylinders. The first piston cylinder comprises two cavities of different volumes. The second piston cylinder comprises only one cavity. There is placed a piston in each of the cavities of the first piston cylinder, which pistons have different diameters and the circumferential surfaces spaced from the inside walls defining the respective cavities of the first piston cylinder to afford flow of pressure fluid past the pistons. The cavity of the second piston cylinder comprises a shock-absorbing device, or dash pot connected with a common piston rod carrying also both the pistons in the cavities of the first piston cylinder. The piston in the cavity of bigger volume of the first piston cylinder is fixed to the common piston rod, whereas the piston in the cavity of smaller volume of the first pisto…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.