Cartridge relief valve with improved stability

Details Cartridge relief valve with improved stability Cartridge relief valve with improved stability

2006-07-04

2006-07-04

Krishnamurthy, Ramesh (Department: 3753)

Fluid handling

Line condition change responsive valves

Pilot or servo controlled

C137S489000, C137S493700, C251S035000

Reexamination Certificate

active

07069945

ABSTRACT:
A cartridge relief valve uses a piston design. The piston replaces a tube used in prior art relief valves. The piston makes the inventive relief valve easier to manufacture and more stable than prior art relief valves. This is due to the fact that, for a given size valve, the diameter of the piston is smaller than the diameter of the tube that it replaces. Furthermore, the diameter of the pilot seat of the inventive relief valve is also smaller than the diameter of the pilot seat of many prior art valves.

REFERENCES:
patent: 3608576 (1971-09-01), Wilhelm
patent: 4351356 (1982-09-01), Koiwai et al.
patent: 6805155 (2004-10-01), Slawinski et al.

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