04439197 is referenced by 152 patents and cites 4 patents.

A medical capsule device includes a capsule body provided with a chamber inside and a communicating path for communicating the chamber with the outside, a movable member arranged in the chamber and movable between a liquid-pushing position at which the volume of the chamber is made smallest and a liquid-receiving position at which the volume of the chamber is made largest, a coiled operating member made of a shape memory alloy for selectively moving the movable member to the liquid-receiving or -pushing position according to temperature changes of the operating member itself, and a switching circuit and power supply source arranged in the capsule body and adjusting the temperature of the operating member to selectively move the movable member to the liquid-pushing or -receiving position.

Title
Medical capsule device
Application Number
6/358112
Publication Number
4439197
Application Date
March 15, 1982
Publication Date
March 27, 1984
Inventor
Koji Kambara
Tokyo
JP
Kazuo Misawa
Tokyo
JP
Kitijiro Kohri
Tokyo
JP
Koichi Matsui
Tokyo
JP
Mikio Honda
Tokyo
JP
Assignee
Olympus Optical
JP
IPC
A61M 7/00
View Original Source