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:
Jul. 21, 1981
Filed:
Jul. 16, 1979
Applicant:
Inventor:
Ned E Dammeyer, New Bremen, OH (US);
Assignee:
Crown Controls Corporation, New Bremen, OH (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01S / ; B66B / ;
U.S. Cl.
CPC ...
367119 ; 367127 ; 187 / ; 116226 ;
Abstract
The height to which the forks of a lift truck are raised is measured by an ultrasonic height measuring arrangement including a downward facing transmitting transducer, positioned on the truck platform in fixed position with respect to the forks, and a downward facing ultrasonic receiving transducer which receives ultrasonic acoustic energy waves reflected by an upward facing parabolic reflector. The receiving transducer is positioned in a casing substantially at the focal point of the parabolic reflector and is mounted by means of springs which provide vibration isolation between the casing and the transducer.