Tire inflation valve with pressure indicator

Claim 2

For use on and in combination with the rim of a pneumatic tubeless tire, a unified self-contained tire inflation valve and complemental air pressure indicating device comprising, in combination, an elongated rigid valving tube having an axial bore extending therethrough and open at its respective inner and outer ends, a normally closed conventional-type tire valve confined and operatively mounted in the outer end portion of said bore and accessible for attaching an air pump hose thereto, a one-piece conventional type compressibly resilient adapter base adapted to be lodged and retentively anchored in an opening provided therefor in a portion of the aforementioned rim, cylinder means surrounding a predetermined portion of said tube and providing a pressuirzed air trapping chamber, said cylinder means having an inner end portion integrally embedded and secured in a central portion of said adapter base and provided with air passages communicably aligned with said chamber, and a spring-biased pressure responsive piston slidingly confined in said chamber and constituting an air pressure indicator, said cylinder means embodying an outer cylinder having a graduated measuring scale thereon with which said indicator is cooperatively oriented, said cylinder means comprising spaced parallel inner as well as outer concentric cylinders, the space between said cylinders defining said air trapping chamber, the respective inner ends of said cylinders being embedded in the central hub portion of said base, said air passages being located diametrically opposite each other and being of predetermined restricted cross-sectional dimension, and the upper and lower end portions of said inner and outer cylinders being united by integral, radial, circumferentially spaced reinforcing webs.

Claim 3

The device defined in and according to claim 1, and wherein said piston comprises a ring-like collar surrounding said inner cylinder and having an inward peripheral O-ring having an encompassing air-tight but sliding contact with an exterior surface of said inner cylinder and an outward peripheral O-ring also having air-tight but sliding contact with an interior surface of the outer cylinder.

Claim 4

The device defined in claim 1, and wherein an interior surface portion of said outer cylinder is provided with an integral endless annular flange which is located in a plane below the plane of said piston and serves as a seating ledge for said piston.

Claim 5

For use on and in combination with the rim of a pneumatic tubeless tire, a unified self-contained tire inflation valve and complemental air pressure indicating device comprising, in combination, an elongated rigid valving tube having an axial bore extending therethrough and open at its respective inner and outer ends, a normally closed conventional-type tire valve confined and operatively mounted in the outer end portion of said bore and accessible for attaching an air pump hose thereto, a one-piece conventional type compressibly resilient adapter base adapted to be lodged and retentively anchored in an opening provided therefor in a portion of the aforementioned rim, cylinder means surrounding a predetermined portion of said tube and providing a pressurized air trapping chamber, said cylinder means having an inner end portion integrally embedded and secured in a central portion of said adapter base and provided with air passages communicably aligned with said chamber, and a spring-biased pressure responsive piston slidingly confined in said chamber and constituting an air pressure indicator, said cylinder means embodying an outer cylinder having a graduated measuring scale thereon with which said indicator is cooperatively oriented, the outer end of said tube being externally screw-threaded and internally screw-threaded, said tire valve having a screw-threaded outward head portion which is plugged and screwed into said internal screw threads, the upper ends of said inner and outer cylinders being joined by an annulus having air bleeding ports communicating with said chamber, and a manually actuatable nut threaded on said external threads and normally blocking and closing said ports and being capable of being adjusted to a position to open the ports to release such air as is, at the time, trapped in the chamber between the piston and said air exhausting and bleeding ports.

Claim 6

For use on and in combination with the rim of a pneumatic tubeless tire, a unified self-contained tire inflation valve and complemental air pressure indicating device comprising, in combination, an elongated rigid valving tube having an axial bore extending therethrough and open at its respective inner and outer ends, a normally closed conventional-type tire valve confined and operatively mounted in the outer end portion of said bore and accessible for attaching an air pump hose thereto, a one-piece conventional type compressibly resilient adapter base adapted to be lodged and retentively anchored in an opening provided therefor in a portion of the aforementioned rim, cylinder means surrounding a predetermined portion of said tube and providing a pressurized air trapping chamber, said cylinder means having an inner end portion integrally embedded and secured in a central portion of said adapter base and provided with air passages communicably aligned with said chamber, and a spring-biased pressure responsive piston slidingly confined in said chamber and constituting an air pressure indicator, said cylinder means embodying an outer cylinder having a graduated measuring scale thereon with which said indicator is cooperatively oriented, the outer end of said tube being externally screw-threaded and internally screw-threaded, said tire valve having a screw-threaded outward head portion which is plugged and screwed into said internal screw threads, the upper ends of said inner and outer cylinders being joined by an annulus having air bleeding ports communicating with said chamber, and a manually actuatable nut threaded on said external threads and normally blocking and closing said ports and being capable of being adjusted to a position to open the ports to release such air as is, at the time, trapped in the chamber between the piston and said air exhausting and bleeding ports.

Claim 7

A constantly ready-for-use valve stem and companion self-contained air pressure indicating device comprising, in combination, an elongated rigid valving tube having an axial bore extending therethrough and open at its respective inner and outer ends, said tube providing a core, a normally closed conventional-type insertable and removable tire valve telescopingly confined and operatively secured within an outer end portion of said bore and readily accessible for the attachment thereto of an air supply hose, a one-piece compressibly resilient conventional adapter base having an encompassing peripheral groove adapted to be lodged and retentively anchored in an accommodation opening provided therefor in a portion of a tubeless tire rim, cylinder means comprising an inner cylinder commensurate in length with and snugly surrounding an outer peripheral surface of said tube, a complemental outer cylinder spaced from and concentrically surrounding said inner cylinder, an apertured flange joined with and uniting corresponding outer ends of said cylinders, valving means operatively mounted on an outer end portion of the tube and cooperable with said apertured flange, a spring-biased pressure responsive piston slidingly confined for operation in the space between said cylinders, said piston comprising a ring-like collar surrounding and slidable on a coacting surface of said inner cylinder and having an inward peripheral O-ring having an encompassing air-tight but sliding contact with the coordinating exterior surface of said inner cylinder and having an outward peripheral surface provided with an O-ring also having air-tight but sliding contact with an interior surface of the outer cylinder, an interior surface of said outer cylinder being provided with an integral endless annular flange located in a plane below the plane of said piston and providing a seating ledge for said piston, the respective inner end portions of said cylinders being embedded and securely anchored in a cooperating axial portion of said base, an exterior surface of said outer cylinder having a graduated measuring scale thereon with which said indicator is cooperatively oriented.

Claim 8

A constantly ready-for-use valve stem and companion self-contained air pressure indicating device comprising, in combination, an elongated rigid valving tube having an axial bore extending therethrough and open at its respective inner and outer ends, said tube providing a core, a normally closed conventional-type insertable and removable tire valve telescopingly confined and operatively secured within an outer end portion of said bore and readily accessible for the attachment thereto of an air supply hose, a one-piece compressibly resilient conventional adapter base having an encompassing peripheral groove adapted to be lodged and retentively anchored in an accommodation opening provided therefor in a portion of a tubeless tire rim, cylinder means comprising an inner cylinder commensurate in length with and snugly surrounding an outer peripheral surface of said tube, a complemental outer cylinder spaced from and concentrically surrounding said inner cylinder, an apertured flange joined with and uniting corresponding outer ends of said cylinders, valving means operatively mounted on an outer end portion of the tube and cooperable with said apertured flange, a spring-biased pressure responsive piston slidingly confined for operation in the space between said cylinders, said piston comprising a ring-like collar surrounding and slidable on a coacting surface of said inner cylinder and having an inward peripheral O-ring having an encompassing air-tight but sliding contact with the coordinating exterior surface of said inner cylinder and having an outward peripheral surface provided with an O-ring also having air-tight but sliding contact with an interior surface of the outer cylinder, an interior surface of said outer cylinder being provided with an integral endless annular flange located in a plane below the plane of said piston and providing a seating ledge for said piston, the respective inner end portions of said cylinders being embedded and securely anchored in a cooperating axial portion of said base, an exterior surface of said outer cylinder having a graduated measuring scale thereon with which said indicator is cooperatively oriented.