Gate valve having reduced friction

Details Gate valve having reduced friction Gate valve having reduced friction

2007-04-10

2007-04-10

Bastianelli, John (Department: 3753)

Valves and valve actuation

Mechanical movement actuator

Particularly packed or sealed

C251S329000, C251S330000, C251S355000

Reexamination Certificate

active

10333609

ABSTRACT:
Valve having a valve housing, a valve member slidable in the valve housing between open and closed positions, and a friction reducer to reduce friction between the valve member and the valve housing. The friction reducer comprises at least one guide shoe made of low friction material, to provide a low friction sliding surface, the guide shoe being removably insertable into a slot in the valve member. The guide shoe is arranged to cooperate with the slot such that the ends of the slot prevent the guide shoe from being extracted from the valve member in the direction of movement of the valve member, when the valve member is in position with the valve housing.

REFERENCES:
patent: 2924233 (1960-02-01), Michaels
patent: 4354425 (1982-10-01), Bruton et al.
patent: 4373700 (1983-02-01), Buchta
patent: 4991619 (1991-02-01), della Porta
patent: 5836569 (1998-11-01), Wurangian
patent: 1 032 992 (1958-06-01), None
patent: 0 171 693 (1986-02-01), None
patent: 0 355 301 (1990-02-01), None
patent: 2 343 953 (1977-08-01), None
patent: 2 070 203 (1981-09-01), None

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