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:
Mar. 13, 1990
Filed:
May. 09, 1988
Carlo Dall'aglio, Volta Reno di Argelato, IT;
Franco Danielli, Zola Predosa, IT;
Guido Golinelli, Bologna, IT;
Marposs Societa per Azioni, S. Marino di Bentivoglio, IT;
Abstract
An apparatus for checking diametral dimensions comprises a resilient protection element, with a substantially tubular shape, for protecting an internal arm-set by preventing any foreign matter, like chips, from entering inside. In order to obtain a protection element that occupies little space and is particularly resistant to wear, blows, chemical etching etc., the element, substantially cylindrical, is made of a lamina of metal--preferably steel for springs, or nickel, or chromium--, or other materials with similar characteristics. Two feelers are placed at diametrically opposite points of the cylindrical element and as a consequence of the lamina flexions move in a diametral direction. The displacement of the feelers is transmitted to a position transducer. The invention mainly applies to plug gauges used in transfer lines for checking small diameter holes.