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. 01, 1985
Filed:
Apr. 21, 1983
Horst Burkhardt, Truchtlaching, DE;
Dr. Johannes Heidenhain GmbH, Traunreut, DE;
Abstract
An improvement is disclosed for an encapsulated measuring device used for measuring the relative position of two objects. The improvement comprises a pair of sealing lips, each secured at one edge to a housing for the measuring device, and together covering an opening in the housing. The lips each define regions of greater flexibility adjacent to regions of lesser flexibility. A follower passes through the opening between the sealing lips. The sealing lips operate to maintain a seal for the opening while permitting the follower to pass between them. The lips are constructed such that openings adjacent to the follower are minimized or eliminated, and little frictional force is exerted on the follower if it moves in the opening along a measuring direction. The result is that accurate measurement is possible while intrusion of debris into the housing is largely prevented due to the seal.