Chamber for housing animals during anaesthetic procedures

摘要

The present invention provides a chamber having at least one operator hand access port; the port comprising a port aperture located within the chamber wall; and at least two flexible non-resilient lightweight sealing gas-tight flaps(SFs), disposed the same plane of the port aperture in an overlapping manner, entirely enclosing the port aperture; each of the SFs is defined by a port aperture edge and chamber edges; the chamber edges are anchored to the chamber wall along more than half of the perimeter of the flap, at a distance from the center of the port greater than the radius of the port and beyond its perimeter; the port aperture edge of each flap is stretched across an entire chord of the port aperture; stretched port apertures edges define an interior access zone, disposed the same plane of the port aperture, characterized solely by the port aperture edges.

主权项

1. A method for enabling an operator to access and manipulate subjects located within a closed chamber having a positive pressure of gas there inside without gas escaping from the chamber, the method comprising:
providing at least one a fluid-tight operator hand access port in a wall of said chamber, wherein said at least one a fluid-tight operator hand access port comprises:
a port aperture located within a chamber wall;at least two first partially overlapping flexible and elastic lightweight sealing gas-tight flaps (SFs) disposed on and entirely enclosing said port aperture, said at least two first partially overlapping SFs form at least one first overlapping area; andat least two second partially overlapping SFs overlaid on said at least two first SFs in contact therewith, forming at least one second overlapping area, said at least one first and at least one second overlapping areas are orthogonal to each other;wherein each of said SFs is defined by a port aperture edge and chamber edges, said chamber edges are anchored to said chamber wall and said port aperture edge is stretched across an entire chord of said port aperture;wherein said at least one first and least one second overlapping areas are formed between respective aperture edges of said at least two first and at least two second partially overlapping SFs such that said port aperture edges define at least two interior access zones, and wherein access into said chamber through said at least two interior access zones is provided by at least one change of direction of said operator's hand.