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Drip-feed-device-for-irrigation-purposes

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Drip feed device for irrigation purposes

Details

Inventors: Tucker, Alfred D.;
Assignee: RIS Irrigation Systems Pty. Ltd. (Elizabeth, AU)
Primary Examiner:
Assistant Examiner:
Attorney, Agent or Firm:

A drip feed device for irrigation purposes comprising a body having an inlet on one side and an annular wall on the other, engaged by a cup having an outlet on one side and an annular wall on the other, to engage the annular wall on the body and housing in a chamber formed between them a button having circular flow paths on each side with flow-restricting baffles which overlap in the flow paths to give counter direction flow around the baffles.

DETAILED DESCRIPTION I claim: 1.
A drip feed device for irrigation purposes in which a body (25) has a cylindrical wall (27) closed at one end by a transverse first wall (26) having on it an inlet member (32) for fluids, and a cap (17) is fitted to the body (25) having a cylindrical wall (20) and across it an intermediate transverse second wall (19) parallel to the first wall (26) and having through it an outlet aperture (18), the said body (25) and the said cap (17) forming between them a closed chamber (16) communicating on one side with the said inlet membrane (32) and on the other side with the said outlet aperture (18), in which chamber (16) is a circular flow-restricting button (1) having flow-restricting channels (5) on each side of it connected in series between the said inlet member (32) and the said outlet aperture (18) of the said chamber (16), and having inwardly projecting flow-restricting baffles (10) and outwardly projecting flow-restricting baffles (11) extending into the said flow-restricting channels (5), characterised in that the said chamber is bounded on the outside by the said cylindrical wall (20) of the said cap (17) and the said button (1) has the inwardly projecting flow-restricting baffles (10) project into the space between and overlap the ends of the said outwardly projecting flow-restricting baffles (11) whereby flow is in counter direction around the ends of both the said inwardly flow-restricting baffles (10) and the said outwardly projecting flow-restricting baffles (11), and further characterised by the outwardly projecting flow-restricting baffles (11) having expanded ends (13) to increase resistance to flow in spaces (12) formed between the inwardly projecting flow-restricting baffles (10).
2.
A drip feed device according to claim 1 further characterised by a second cylindrical outer wall (21) on the cap (17) outside of the said inner wall (20) with a space therebetween to receive the cylindrical wall (27) of the body (25), and interengaging screw threads (22 and 30) on the said outer cylindrical wall (21) and the cylindrical wall (27) on the said body (25), said cylindrical wall 20 and/or said cylindrical wall 27 tapering slightly at the interface to provide an interference fit to prevent leakage therebetween

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