Bi-component drip emitter
US8317111B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 31, 2010 |
| Grant date | Nov 27, 2012 |
| Priority date | — |
| Expiry date | Jan 2, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/494
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A drip emitter formed from an elastomer component and a rigid polymer component for welding to the inner surface of an irrigation hose. The drip emitter has a fluid flow pathway including a flow restriction, typically in the form of a labyrinth, formed at least partially within the elastomer to provide a variable geometry flow restriction. The flow restriction may include under-tooth bypass spaces located between the base and the sequence of baffles, over-tooth bypass clearances or may employ baffles with a thickened root portion which forms a sloped transition region between an upright upper wall portion and the base. In each case, flow through the drip emitter when deployed is regulated by pressure-responsive deformation of the elastomer component. Some implementations employ a thermoset elastomer component such as silicone with mechanical interlocking between the components.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.