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:
Oct. 04, 1983
Filed:
Jan. 29, 1981
Dieter Boeder, Duesseldorf, DE;
Karl-Josef Wiemers, Bochum, DE;
Rheinmetall GmbH, Duesseldorf, DE;
Abstract
An internal diameter measuring and scanning device for pipes, gun barrels and the like, wherein the arrangement is slidably axially movable through the pipe. The arrangement includes a guide body which is rotatably mounted in the pipe. A plurality of feeler fingers are mounted on the guide body and are outwardly biased so as to contact the internal wall surface of the pipe. The feeler fingers are operatively connected to stretch measuring strips which are adapted to emit electrical pulses in accordance with the measurements carried out by the feeler fingers. The electrical pulses are processed in a processing and evaluation unit. A measuring sled is connected to the guide body and is centered in the pipe by leaf springs or brush rings. A step-motor is connected to the guide body to stepwise advance it through the pipe from measuring region to measuring region.