Patent ID: 11931752
Assignee: SUZHOU HSEN-MEZ AUTOMATION CO., LTD.
Field: Surface technology, coating (Chemistry)
Classification: CPC B | IPC B

Claim 0:
1. A non-contact precision pneumatic injection valve comprising:
a cylinder;
a needle disposed inside the cylinder; and
an adjustable stroke limiting component comprising:
a thread-toothed column threadedly engaging an upper end of the cylinder;
a spring-limiting column disposed inside and fixedly attached to the thread-toothed column, the spring-limiting column comprising a first protrusion ring;
a spring column axially movably disposed inside the spring-limiting column and comprising a second protrusion ring, a lower end of the spring column defining a stroke of the needle; and
a spring, one end of the spring fixedly engaging the first protrusion ring and the other end of the spring fixedly engaging the second protrusion so that the spring keeps the spring column at least partially inside the spring-limiting column, the spring biasing the lower end of the spring column toward the needle.