Fluid handling – Systems – Multi-way valve unit
Reexamination Certificate
2006-06-13
2006-06-13
Rivell, John (Department: 3753)
Fluid handling
Systems
Multi-way valve unit
C137S625220
Reexamination Certificate
active
07059350
ABSTRACT:
An airflow controlling mechanism including: a pneumatic cylinder having a cylinder body, an air chamber being formed in the cylinder body, a forward and a backward vents respectively passing through one end of the cylinder body for communicating the air chamber with outer side; an air valve having an annular body section, one end face of the air valve abutting against one end face of the cylinder body, two extension vents respectively extending through the body section, the openings of two ends of each extension vent being respectively positioned one end face of the body section and an inner circumference of the body section, the openings of the two extension vents positioned on the end face of the body section respectively communicating with the forward and backward vents; and an adjustment member having a base section coaxially accommodated in the body section, whereby the adjustment member can be turned between a clockwise position and a counterclockwise position, the circumference of the base section abutting against the inner circumference of the body section, an air passage radially extending through the base section, an opening of one end of the air passage being an outlet formed on the circumference of the base section for communicating with the air passage and a corresponding extension vent.
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patent: 4800924 (1989-01-01), Johnson
Dennison Schultz Dougherty & MacDonald
Rivell John
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