Animal gas mask assembly

Claim 1

A gas mask assembly for snouted animals comprising: a. means defining a rigid nose cap member for covering the nostirls and anterior portion of the animal's snout and having a generally circular marginal portion and means defining an opening in said nose cap member for the attachment of a breathing tube; b. abutment means in said nose cap member for preventing the animal's nostrils from becoming occluded by said nose cap member, said abutment means comprising a member positioned symmetrical with respect to an axis through the center of the opening defined by said circular marginal portion of said nose cap and intersecting the center of the end of said nose cap and defining a surface spaced from the inner surfaces thereof; c. a flexible sleeve member formed from substantially gas-impermeable material and shaped to fit around the animal's snout, said sleeve member being joined to the marginal portion of said nose cap member; and d. immobilizing cinch means secured to the open end of said sleeve member and including a rope lock for securing and sealing said sleeve member to the animal's snout and for restraining the animal's head and allowing the cinch to tighten as the animal struggles against said immobilizing cinch means.