An assembly for a tire inflation system includes a ring portion. The ring portion has an outer surface and an inner surface. A first projection and a second projection each extend from the inner surface. A valve assembly is connected to the ring portion and disposed in from the outer surface.

A tubeless air valve stem has a body, an airtight element, and a sleeve. The body has a passage, a through hole, and at least one side hole. The passage is formed on a top end of the body. The through hole is formed through a bottom end of the body and is in communication with the passage. The at least one side hole is formed through an outer surface of the body and is in communication with the passage. The airtight element is disposed around the body. The sleeve is disposed around the body for closing the at least one side hole. Gas or liquid can be injected into a tubeless tire via the at least one side hole. The intake efficiency of the tubeless air valve stem can be maintained and is not influenced by the remaining reinforcing agent.

An apparatus for filling four or more tires simultaneously with air includes four or more fill hoses, each of the four or more fill hoses being between four and twenty feet in length and each of the four or more fill hoses adapted to connect to a tire fill valve of each of the four or more tires. A common manifold connects each of the four or more fill hoses allowing for passive tire filling through bidirectional communication of the air between the four or more tires. An air-input-port is attached to the common manifold allowing all of the tires to be inflated at the same time using active filling through an external air supply. The apparatus may comprise one or more valves attached to the common manifold. The apparatus may comprise one or more gauges attached to the common manifold.

A system and method of controlling inflation of a tire. Tire pressure may be determined by providing pulses of pressurized gas to a tire valve. The pulses of pressurized gas may not open the tire valve when the tire pressure is greater than or equal to the target tire pressure, thereby inhibiting overinflation.

A system and method of controlling inflation of a tire. Tire pressure may be determined by providing pulses of pressurized gas to a tire valve. The pulses of pressurized gas may not open the tire valve when the tire pressure is greater than or equal to the target tire pressure, thereby inhibiting overinflation.

A multiple chamber pneumatic tire having an upper section and a lower section. A diaphragm separates the upper section from the lower section. The lower section has at least two chambers. The chambers each have a chamber valve, a nail guard layer, a plurality of fibers having an end connected to an inner wall surface of a chamber, and an interconnected barrier connected to at least two portions of a chamber wall surface. The upper section of the tire has at least one linkage located within at least one tube with a primary end connected to a chamber valve of a chamber and a secondary end connected to a tire rim or to a main valve. A tire pressure monitoring system can be in communication with a chamber valve. The tire can have a ring with at least one retractable stud.

An assembly for a tire inflation system includes a tire stem. A housing is engaged with a first end of the tire stem. The housing comprises a fluid conduit extending therethrough and a first adapter secured to a second adapter. The second adapter receives the first end of the tire stem and a first end of the first adapter. The first end of the tire stem and the first end of the first adapter abut each other. A valve is disposed in the fluid conduit and positioned within the first adapter. A depressor member is attacked to the first end of the first adapter and provided in the fluid conduit. The depressor member extends away from the valve and toward the tire stem. A seal member is disposed in a groove in the second adapter and provided around an outer surface of the tire stem.

An aspirator assembly for an inflatable device may have an inner housing disposed about an axis with an outlet formed through the inner housing. An outer housing may also be disposed about the axis with a surface of the outer housing covering the outlet. The outer housing may be translatable relative to the inner housing to expose the outlet in response to a gas pressure within the aspirator assembly being above a threshold.

An inflation valve cap comprises a main body structure (1), a push rod structure, an elastic restoring member (4), and a push rod fixing base (6). The interior of the main body structure (1) is provided with a central cavity. The push rod structure is disposed inside the central cavity. The elastic restoring member (4) is arranged between the upper end of the push rod structure and the push rod fixing base (6). The push rod fixing base (6) is located at a lower portion of the central cavity. A bottom portion of the push rod structure is provided with a push rod seal (5), and in a non-inflated state, the push rod seal (5) presses against an inner inclined face at the middle portion of the inner cavity of the push rod fixing base (6), thereby achieving the sealing in the non-inflated state.

A tire structure disposed at a rim is provided. The tire structure includes a tire body, a flexible sealing member and a nozzle. The tire body is ring-shaped and includes a groove and two beads. The flexible sealing member is connected to the tire body to form an inflating space with the groove, and the flexible sealing member includes a through hole. The nozzle is disposed at the flexible sealing member. The nozzle includes a base and a valve stem. The base includes a screw hole and is disposed at a far side of the flexible sealing member. The screw hole corresponds to the through hole. The valve stem includes a fastening end and an inflating channel. The fastening end is configured to insert into the screw hole, and the inflating channel is configured to allow the gas to pass therethrough.