×

Cryogenic breathing system

  • US 4,211,086 A
  • Filed: 03/12/1979
  • Issued: 07/08/1980
  • Est. Priority Date: 10/11/1977
  • Status: Expired due to Term
First Claim
Patent Images

1. A cryogenic breathing system comprising a first storage container including a first outer casing and a first inner container, the first casing and first container each having a small opening, a first tubular connection between the openings of the first casing and first container, and means between the first casing and first container inhibiting heat transfer therebetween, said storage container providing an evacuable space between its outer casing and its inner container,a first gas-tight closure for said openings fastened to the first outer casing and carrying within the first inner container a first withdrawal tube, the first gas-tight closure carrying outside the first outer casing a first connecting means in communication with the first withdrawal tube and including a first complementary surface, and first means to control flow through the first withdrawal tube and first connecting means, anda second portable container including a second outer casing and a second inner container, the second outer casing and second inner container having a small opening, a second tubular connection between the openings of the second outer casing and second inner container, and further means between the second casing and second inner container inhibiting heat transfer therebetween, said portable container providing an evacuable space between the second outer casing and the second inner container,a second gas-tight closure for said second openings carrying within the second inner container a liquid level indicating means, a withdrawal tube, and means encircling the liquid level indicating means, the second gas-tight closure carrying outside the second outer casing a transparent sight gauge into which the liquid level indicating means extends, a second connecting means including a normally closed check valve in communication with the second inner container and including a second complementary surface adapted to engage the first connecting means of the first storage container, a breathing coil in communication with the second withdrawal tube and a second means to control flow through the second withdrawal tube and breathing coil,said portable container being connectable to and fillable from said storage container through said first and second connecting means by rotating the portable container and engaging the first and second complementary surfaces of the two connecting means and allowing the portable container to return to its vertical position, to open the check valve of the second connecting means, and to lock the second portable container to the first storage container for filling.

View all claims
  • 5 Assignments
Timeline View
Assignment View
    ×
    ×