Matsushita Electric Industrial Co., Ltd.

Ryohei Yoshida

Masahiro Kimura

Seiji Yamaguchi

Hidenori Kitamura

Saburo Kajikawa

Masaki Shibuya

Hiroyuki Uratani

Masakuni Soejima

Kouichi Fujita

Yasushi Kondo

Haruka Ishikawa

Yoshihiro Taniguchi

Yoshitaka Hayashi

A vacuum cleaner includes an electric blower for generating a suction air flow, a suction head in communication with the electric blower for drawing in dirt, a filter bag communication with the electric blower for capturing and collecting dirt, an exhaust unit for discharging exhaust air from the electric blower to atmosphere, and an ion generator for generating negative ions and/or positive ions. The ion generator is placed between the suction head and the filter bag.

Vacuum cleaner having an ion generator

A shredder comprises a cutter unit including a pair of rotary cutters for shredding a material therebetween while the rotary cutters are rotating in a normal direction, a reversible motor for rotating the rotary cutters through a speed reducer, and a switch unit for selectively causing the motor to rotate the rotary cutter in the normal direction or reversing the motor to rotate the rotary cutters in a reverse direction to remove the material from the rotary cutters when the material is jammed in the rotary cutters. An electrical control circuit is responsive to actuation of the switch unit for enabling the motor to produce a larger torque while rotating in the reverse direction than the torque produced while rotating in the normal direction, thereby reliably releasing the rotary cutters from biting engagement with the material when jammed. The switch unit has means for generating a time delay while switching between rotation of the motor in the normal direction and rotation of the motor in the reverse direction, so that the motor and the speed reducer are protected against an undue load when starting to rotate in the reverse direction.

Shredder with increased reversed unlocking torque

Growing community of inventors

Shiga, Japan

Ryohei Yoshida