Actuating valve for bidirectional pneumatic cylinder and use...

Details Actuating valve for bidirectional pneumatic cylinder and use... Actuating valve for bidirectional pneumatic cylinder and use...

2005-02-01

2005-02-01

Matecki, Kathy (Department: 3654)

Winding, tensioning, or guiding

Support for a strand material holder

For bobbins

C242S129000, C242S591000, C242S474000, C242S559100, C091S420000, C091S465000

Reexamination Certificate

active

06848641

ABSTRACT:
An actuating valve has two relay valves connected to a compressed air source and a pneumatic cylinder with two pressure chambers. When one relay valve is actuated, one pressure chamber is pressure-loaded and the other is relieved. Two 3/2 port directional control valves are arranged upstream of the pneumatic cylinder. Two check valves are positioned in branch lines connecting the relay valves and the directional control valves. A control line connects the branch line to the other directional control valve, respectively. The directional control valves are moveable between a first position allowing compressed air to pass and a pressure relief position. When the relay valves are inactive, the directional control valves are in the first position and the relay valves are in a venting position for the branch lines. When one relay valve is actuated, it assumes a position allowing passage of air to the branch line connected to it.

REFERENCES:
patent: 4162025 (1979-07-01), Achelpohl et al.
patent: 4163357 (1979-08-01), Greive et al.
patent: 4175717 (1979-11-01), Mathiolon et al.
patent: 4493244 (1985-01-01), Stillfried et al.
patent: 4614148 (1986-09-01), Bates
patent: 4730466 (1988-03-01), Tenconi
patent: 6003428 (1999-12-01), Mundie et al.
patent: 6059221 (2000-05-01), Broger et al.
patent: 6065288 (2000-05-01), Glomeau
patent: 2794136 (1999-05-01), None

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