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. 09, 1991
Filed:
May. 17, 1990
Yukio Obata, Yokohama, JP;
Hitoshi Ogasahara, Yokohama, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A full-automatic washing and drying machine has a drum mounted in an outer tank for rotation about a substantially horizontal axis, a reversible motor operable at a fixed speed for driving the drum, and a power transmission device for transmitting the torque of the motor to the drum axle. The power transmission means include a reduction device. The motor and the reduction device are controlled by a control device such that, during washing and drying operations, the direction of rotation of an output shaft of the motor is switched in short periods while the speed-changing device transmits the rotation of the output shaft of the motor to the drum axle at a reduced speed, whereas, during dehydration operation, the motor operates unidirectionally and the speed-changing device transmits the unidirectional rotation of the motor output shaft to the drum axle with a speed reduction in an initial stage of the dehydration operation and, thereafter, without speed reduction.