Sealing valve

Details Sealing valve Sealing valve

2007-11-01

2010-06-15

Fristoe, Jr., John K (Department: 3753)

Valves and valve actuation

With means to increase head and seat contact pressure

Gate valve

C251S203000

Reexamination Certificate

active

07735804

ABSTRACT:
A sealing valve is disclosed. The valve comprises a valve seat, a power element and an elevation section. The valve seat is provided with through hole from front to rear, and the upper end of the valve seat is connected to a guiding body having a guiding slot and a directional slot. The power element is mounted at the upper end of the valve seat to control the elevating movement of the elevation section. The elevation section is downward extended to mount within a sealing element. The sealing element is driven to the through hole to seal the hole or to be driven away from the through hole, this avoid wearing within the valve seat in the course of sliding.

REFERENCES:
patent: 5626324 (1997-05-01), Nakamura et al.
patent: 6237892 (2001-05-01), Ito
patent: 6390449 (2002-05-01), Ishigaki et al.
patent: 7066443 (2006-06-01), Ishigaki
patent: 7100892 (2006-09-01), Iwabuchi
patent: 7198251 (2007-04-01), Kondoh
patent: 7234679 (2007-06-01), Ishigaki

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