Drip irrigation valve with helical flow path

Details Drip irrigation valve with helical flow path Drip irrigation valve with helical flow path

1975-08-08

1976-12-21

Artis, Henry K.

Pipes and tubular conduits

With flow regulators and/or baffles

Restrictors

251121, 251126, 138 46, F15D 102

Patent

active

039982440

ABSTRACT:
A drip irrigation valve comprising an outer member having a passageway and an inner member mounted in the passageway for axial movement. An axially and circumferentially extending rib is provided on a first of the members and cooperates with a confronting surface of a second of the members to provide a helical flow path. Dams are provided in the flow path to increase the resistance to fluid flow. To increase the flow rate, the members are moved axially to take one or more of the restrictions out of the flow passage. To make the valve pressure compensating, one of the member is resilient and can be resiliently deformed by the fluid at inlet pressure to increase the resistance to flow provided by the restrictions.

REFERENCES:
patent: 3095006 (1963-06-01), Smith
patent: 3693657 (1972-09-01), Olson
patent: 3729142 (1973-04-01), Rangel-Garza et al.
patent: 3780946 (1973-12-01), Smith et al.
patent: 3806036 (1974-04-01), Olson
patent: 3815636 (1974-06-01), Menzel
patent: 3841354 (1974-10-01), McDonnell
patent: 3897009 (1975-07-01), Rangel-Garza et al.
patent: 3948479 (1976-04-01), Bedo et al.

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