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. 23, 2013
Filed:
Jun. 13, 2008
Keigo Yamamoto, Tokyo, JP;
Keigo Yamamoto, Tokyo, JP;
Mitsubishi Electric Corporation, Tokyo, JP;
Abstract
To alleviate the ear block discomfort of passengers without causing any undue reduction in the operational efficiency of an elevator. A travel distance calculating sectioncalculates a travel distance of a car roombased on destination floor informationand a car position command signal, and output travel distance informationto a speed pattern generating section. The speed pattern generating sectioncompares the travel distance with a predetermined distance, generates a speed patternof a normal operation if the travel distance is short, and generates the speed patternof a partially low speed operation if the travel distance is long. The predetermined distance indicates a difference in height corresponding to a difference in air pressure that causes the Eustachian tube to open against ear block discomfort by a passenger. A speed control sectionmakes the car roommove up and down based on the speed pattern. This allows the car roomto move at low speed after the first opening of the Eustachian tube, and therefore an interval in time when the car roommoves of a distance of the difference in height causing another ear block discomfort is made long. The ear block discomfort of passengers may thus be alleviated.