Plastic servovalve

Details Plastic servovalve Plastic servovalve

1995-11-13

1996-09-03

Michalsky, Gerald A.

Fluid handling

Systems

Multi-way valve unit

13762569, 156 731, 251366, F15B 1304, F16K 1107

Patent

active

055514820

ABSTRACT:
Disclosed is a direct drive servovalve having a molded plastic housing. A metal sleeve having a spool valve slidably disposed therein is placed within opposed cavities formed within opposite housing halves. The housing halves are brought together under pressure and an ultrasonic horn is activated. Energy directing beads formed on the housing halves as well as interfering surfaces about the periphery melt under a pressure and ultrasonic energy allowing the two housing halves to move toward each other and mate. Upon deactivation of the ultrasonic horn, the molten plastic material cools and forms a seal about flow ports in the metallic sleeve as well as a fusion bond about the periphery of the housing.

REFERENCES:
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patent: 3587156 (1971-06-01), Sorenson
patent: 3680593 (1972-08-01), Sorenson
patent: 3883114 (1975-05-01), Harris et al.
patent: 3952996 (1976-04-01), Hart
patent: 3960166 (1976-06-01), Linser
patent: 4021016 (1977-05-01), Hart
patent: 4530486 (1985-07-01), Rusnak
patent: 4632148 (1986-12-01), Stark et al.
patent: 5004011 (1991-04-01), Linder et al.
patent: 5222715 (1993-06-01), Framberg
patent: 5341846 (1994-08-01), Framberg

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