Spool

Details Spool Spool

1998-10-20

1999-11-23

Michalsky, Gerald A.

Valves and valve actuation

Reciprocating valve

Piston

13762569, 277552, 277561, 277586, F16K 324, F15B 1302

Patent

active

059885912

ABSTRACT:
A packing mounting groove formed in a spool has a wider portion of a large groove width and a narrower portion of a small groove width, and a packing that is mounted in the packing mounting groove has a first portion that fits in the wider portion and a second portion that fits in the narrower portion. A plurality of fixing protrusions formed concentrically on both sides of the second portion are pressure-contacted with a groove wall of the narrower portion to fixedly mount the packing in the mounting groove.

REFERENCES:
patent: 5002290 (1991-03-01), Pernin
patent: 5171025 (1992-12-01), Stoll et al.
patent: 5513674 (1996-05-01), Frisch
patent: 5609343 (1997-03-01), Asou et al.

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