Water control valve core with a segmented locking fuction

Details Water control valve core with a segmented locking fuction Water control valve core with a segmented locking fuction

2008-04-01

2011-10-04

Hepperle, Stephen M (Department: 3753)

Fluid handling

Removable valve head and seat unit

Retained by bonnet or closure

C137S315130

Reexamination Certificate

active

08028714

ABSTRACT:
The present invention provides a lateral draft tube for a water control valve core, which is defined by a through-type groove and upper and lower openings. The through-type groove is sleeved around the shell of the water control valve core. The upper and lower portions have different diameters on the external wall of the draft tube. A ring flange is formed on the upper portion, and a guide ring surface is formed on the lower portion. The ring flange is provided with a sealing ring, and a drainage portion is arranged at the lower end of the draft tube to connect the through-type groove and guide ring surface. The draft tube can be located higher than the water control valve core, such that upward flow of the guide ring surface is not limited by the water control valve core. Thus, the upward flow of the water control valve core improves.

REFERENCES:
patent: 4313350 (1982-02-01), Keller et al.
patent: 4478249 (1984-10-01), Fleischmann
patent: 4813455 (1989-03-01), Iqbal
patent: 4901749 (1990-02-01), Hutto

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