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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.:

US 9205746 B1

PDFFull Text
Date of Patent:
Dec. 08, 2015

Filed:

Oct. 03, 2012

Electric assist cart

Applicant:

Kayaba Industry Co., Ltd., Minato-ku, Tokyo, JP;

Inventors:

Shinichi Sekine, Fukaya, JP;

Osamu Miyatani, Kani, JP;

Assignee:

KAYABA INDUSTRY CO., LTD., Tokyo, JP;

Attorney:

Hauptman Ham, LLP

Primary Examiner:

Faye M Fleming

Int. Cl.
CPC ...
B60L 7/26 (2006.01); B60L 3/00 (2006.01); B62B 3/00 (2006.01); B62B 5/04 (2006.01); B60L 3/04 (2006.01); B60L 7/12 (2006.01); B60L 11/18 (2006.01); B60L 15/20 (2006.01); B62B 5/00 (2006.01); B60L 1/00 (2006.01);
U.S. Cl.
CPC ...
B60L 3/00 (2013.01); B60L 1/003 (2013.01); B60L 3/0061 (2013.01); B60L 3/0084 (2013.01); B60L 3/04 (2013.01); B60L 7/12 (2013.01); B60L 7/26 (2013.01); B60L 11/1805 (2013.01); B60L 15/2009 (2013.01); B60L 15/2036 (2013.01); B62B 3/00 (2013.01); B62B 3/001 (2013.01); B62B 5/0033 (2013.01); B62B 5/0073 (2013.01); B62B 5/04 (2013.01); B60L 2200/30 (2013.01); B60L 2220/46 (2013.01); B60L 2240/423 (2013.01); B60L 2250/16 (2013.01); B60L 2270/145 (2013.01); B62B 2203/10 (2013.01); B62B 2301/20 (2013.01); Y02T 10/642 (2013.01); Y02T 10/7005 (2013.01); Y02T 10/7275 (2013.01);
Abstract

An electric assist cart includes: a drive wheel provided in a body frame; a control handle used by an operator to input a driving force to the body frame; a torque sensor that detects a driving torque applied to the body frame from the control handle; a controller that computes an assisting force applied to the drive wheel based on the driving torque; an electric motor that applies the assisting force to the drive wheel; a brake that brakes the drive wheel and switches from a braking state to an unbraking state when a predetermined electric current flows; and a brake release switch manipulated by an operator to allow the controller to instruct the predetermined electric current to flow to the brake, wherein the controller maintains the braking state of the brake even when the brake release switch is manipulated without turning on power, and power is then turned on.

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