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:
Jun. 06, 1989
Filed:
Dec. 28, 1987
Keiichi Iwakoshi, Nasu, JP;
Mitsuru Sato, Shibuya, JP;
Hiroyuki Umeda, Kasukabe, JP;
Toshinori Nishizawa, Mitaka, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Kabushiki Kaisha Machidaseisakujyo, Tokyo, JP;
Abstract
A constant pressure apparatus of an endoscope includes a gas supplying conduit for cleaning an optical observation system, a sucking conduit for constantly holding the inner pressure of a body, and an insertion port for inserting a device for medical treatment into the body. The constant pressure apparatus comprises a pressure detector disposed in a portion of the gas supplying conduit and detecting the pressure in the gas supplying conduit. The pressure detector is electrically connected to a control device for controlling the inner pressure of the body. A gas supplying device for adjusting the inner pressure of the body is disposed in the insertion port and may comprise a fiber for transmitting laser into which a cooling conduit for receiving carbon dioxide is inserted. Electromagnetic valves are disposed in the gas supplying conduit, the sucking conduit and the gas supplying means, respectively, and are operated by signals from the control device.