Mask for the safe delivery of inhalation gases to small laboratory animals

US4332244A · kind A · utility

Assignee

• The Government of the United States as represented by the Secretary of Department of Health and Human Services · US

Inventors

• David Levy · Netanya, IL
• Alfred Zwies · New York, US
• Thomas E. Duffy · San Diego, US

Key dates

• Filing date: Oct 8, 1980
• Grant date: Jun 1, 1982
• Expiry date: Oct 8, 2000

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S128/91
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

An anesthesia mask for laboratory animals comprising a supply tube having a generally conical mask at one end into which the animal's snout is inserted. Pressurized anesthesia gas is delivered through the tube and is prevented from leaking into the ambient environment by means of a second tube which concentrically surrounds the supply tube and is annularly spaced therefrom so that the space can be evacuated by a vacuum source. A holding bar is slidable transversely into the mask to hook onto the animal's incisors.