The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 14, 1986
Filed:
Jul. 03, 1984
Karl Trittler, Aldingen, DE;
J. Hengstler KG., Aldingen, DE;
Festo KG, Esslingen, DE;
Abstract
This invention relates to a pneumatically actuated stepping valve for an automatic control of inlets and outlets for a pneumatic fluid. Each stepping movement is performed in response to a feedback signal indicating that an operation controlled by the valve has been completed. A distributing disc is provided for selecting consecutive pairs of ports consisting of an inlet port and an outlet port each. The stepping valve consists mainly of plastic parts, which contain numerous bores and passages and can be made at low cost. In accordance with the invention the valve disc cooperates with a sealing piston, which in response to pressure applied to said piston establishes connections to through passages of the valve disc, whereas when the piston is pressure-relieved it will be urged by spring means to disengage the valve disc so that the latter will not be restrained by the piston during its stepping movement.