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:
Jun. 18, 1991
Filed:
Aug. 18, 1989
Fritz Muller, Ingelfinger-Criesbach, DE;
Other;
Abstract
A piston drive e.g. for actuating a valve includes a piston which reciprocates in axial direction within a housing between two end positions, with one end position being defined by a worm drive including a manually actuated worm which actuates a worm wheel movable in axial direction and defining a stop for the piston. The other end position is defined by a gear which is arranged in the path of movement of the piston and is provided with an internal gear meshing with the external thread of a stationary connecting piece of the housing. The gear is turned relative to the connecting piece and thus moved in axial direction by a tool which is insertable through a bore in the housing from the outside.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile