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:
May. 17, 2016
Filed:
Mar. 26, 2013
Yui Masuda, Shizuoka, JP;
Makoto Muramatsu, Shizuoka, JP;
Yui Masuda, Shizuoka, JP;
Makoto Muramatsu, Shizuoka, JP;
NTN CORPORATION, Osaka, JP;
Abstract
A parking brake has the function of monitoring a malfunction of the parking brake, thereby preventing accidents. The parking brake includes an electric motor and a linear motion mechanism which are connected together through a speed reduction mechanism. The parking brake further includes a locking pin which can be brought into engagement with the speed reduction mechanism by a solenoid. The parking brake further includes a monitor for detecting a change in reactance of the solenoid. Since the change in reactance as detected corresponds to a displacement of a plunger, it is possible to prevent accidents by monitoring deteriorated sliding properties of the locking pin based on the displacement detected.