Abstract: Closed circuit emergency breathing apparatus is disclosed which is comprised of concentrically associated oxygen container and scrubber components, and a flow control valve assembly mounted on the open end of the compressed oxygen container and against the corresponding end of the scrubber. Unique valve structures enable the provision of all valve functions by valve components provided in a common support arrangement by which the valve assembly is mounted on the compressed oxygen container and structurally interrelated with the corresponding end of the scrubber. Breathing hose, pressure gauge and burst valve components are also mounted on the common support, and a breathing bag is mounted on the scrubber between the opposite ends thereof.

Abstract: Closed circuit emergency breathing apparatus is disclosed which is comprised of concentrically associated oxygen container and scrubber components, and a flow control valve assembly mounted on the open end of the compressed oxygen container and against the corresponding end of the scrubber. Unique valve structures enable the provision of all valve functions by valve components provided in a common support arrangement by which the valve assembly is mounted on the compressed oxygen container and structurally interrelated with the corresponding end of the scrubber. Breathing hose, pressure gauge and burst valve components are also mounted on the common support, and a breathing bag is mounted on the scrubber between the opposite ends thereof.

Abstract: Portable emergency breathing apparatus is disclosed which is comprised of a compressed breathing gas container having a housing mounted on the open end thereof which supports a pressure gauge, a pressure reducing valve assembly, and burst valve, fill valve and needle valve components. The pressure reducing valve controls the flow of breathing gas from the container to a breathing hose attached to the housing and leading to a face mask or hood worn by the user. The housing has a flat axially outer end relative to the container and a radially outer periphery which is within the cylindrical plane of the side wall of the container, and the housing is structured for mounting on the container so as to optimize compactness of the apparatus and protection of the pressure gauge and the pressure reducing, burst, fill and needle valves from damage during storage and use.

Abstract: Portable emergency breathing apparatus is disclosed which is comprised of a unitary, generally flat manifold having opposite ends and top and bottom sides and a manifold passageway between the opposite ends. Three parallel, laterally juxtaposed compressed gas containers are mounted on the bottom side of the manifold by means of coupling components extending through the manifold from the top side and into internally threaded necks of the containers. Each of the coupling components provides flow communication between the interior of the corresponding container and the manifold passageway, and a shut-off and pressure reducing valve assembly is mounted on the manifold between two of the containers. The valve assembly has upper and lower portions respectively, adjacent the top and bottom sides of the manifold with the lower portion disposed in the space between the necks of the two adjacent containers.

Abstract: A vehicle wheel assembly carrying a pneumatic tire includes a hub rotatably mounted on a fixed axle component and provided with an internal air flow passageway. One end of the passageway communicates with the interior of the tire through a pneumatically actuated check valve, and the other end of the passageway is adapted to be connected to an air pressure control system carried by the vehicle. The latter connection is through a sealing arrangement between the rotating hub and fixed axle component and which includes a displaceable seal on the fixed axle component normally maintained out of contact with the rotatable hub. The displaceable seal is adapted to be moved into engagement with the hub by air under pressure from the air pressure control system after which the vehicle tire can be inflated, deflated or checked for pressure through the operation of appropriate controls in the air pressure control system.

Abstract: A lightweight portable, self-contained, closed-type breathing apparatus comprises an oxygen pressure cylinder having connected thereto manually actuated oxygen flow control means. Included is a carbon dioxide scrubber having connected thereto breathing means including check valves and a breathing tube. A flexible breathing bag is provided, as are means for mounting the oxygen cylinder, the flow control means, the scrubber and check valves in fixed mutual relationship, with the oxygen cylinder and scrubber disposed within the breathing bag. The flow control means is constructed upon actuation, to meter flow of oxygen from the cylinder into the breathing bag. The check valves cause a user's exhaled breath to pass through the scrubber before entering the breathing bag, while causing a user to inhale directly from the breathing bag, bypassing the scrubber. An external canister protects the bag from accidental damage.

Abstract: Emergency shutoff valve apparatus, including a gate valve assembly actuated to a closed position by fluid pressure acting on an actuator piston, such actuation causing the piston to exert a force through a liquid medium on a power piston to store energy in a spring device or other energy storing means. Relieving of the fluid pressure acting on the piston causes the energy storing means to act through the power piston and liquid medium to shift the actuator piston to a position closing the gate valve assembly. The gate valve assembly can also be shifted to a closed position by supplemental fluid pressure acting on the power piston or on an override piston.