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:
Nov. 04, 2025
Filed:
Nov. 09, 2021
Kito Corporation, Yamanashi, JP;
Yusaku Ido, Nakakoma-gun, JP;
Takuma Isshiki, Nakakoma-gun, JP;
KITO CORPORATION, Nakakoma-gun, JP;
Abstract
An upper and lower limit detecting apparatus and method for a load suspending device of an electric chain block capable of easily and rapidly detecting reaching of the load suspending device to a lower limit without providing a lower limit reaching detection limit switch. In an electric chain block including electric motor, friction clutch, electromagnetic brake, speed reduction gear mechanism, load sheave, load chain, load suspending device, etc., the reaching of the load suspending device to the upper limit is detected by an upper-limit reaching detection limit switch, and the reaching of the load suspending device to the lower limit is detected by judging, with an electric power type overload limiter, that the power consumption of the electric motor has exceeded a predetermined value as a result of a stopper abutting against a chain guide and the friction clutch being dragged by rotational force of the electric motor.