Resilient tires and wheels – Tires – resilient – Inflating devices
Patent
1995-05-17
1996-09-24
Ball, Michael W.
Resilient tires and wheels
Tires, resilient
Inflating devices
417211, 417233, B60C 2312, F04B 3100
Patent
active
055587305
ABSTRACT:
A self-inflating tire pump is integrally fixed to a wheel of a vehicle for automatically pumping air into an inflation region of a tire which is mounted on the wheel. The pump includes a piston which is movable radially outward in a cylinder by centrifugal force to draw air from the atmosphere into a compression chamber and is movable radially inward by a biasing element to compress the air in the compression chamber and pump it into the inflation region. The biasing element includes a surface of the piston which is exposed to air pressure in the inflation region, and prevents the piston from moving outward until the wheel rotates above a certain speed, thereby preventing contaminants such as water and dirt from entering the compression chamber during low speed operation of the vehicle in adverse terrain. A stopper mechanism prevents the piston from moving when the tire pressure is above a normal value, thereby reducing frictional wear of the pump.
REFERENCES:
patent: 1254903 (1918-01-01), Hall
patent: 1887715 (1932-11-01), Hester
patent: 4269252 (1981-05-01), Shapiro
patent: 4349064 (1982-09-01), Booth
patent: 4840212 (1989-06-01), Wei
patent: 4922984 (1990-05-01), Dos'joub et al.
patent: 5052456 (1991-10-01), Dos'joub et al.
patent: 5201968 (1993-04-01), Renier
Griffin William S.
Olney Ross D.
Schnelker David E.
Ball Michael W.
Denson-Low W. K.
Duraiswamy V. D.
Hughes Aircraft Company
Lorin Francis J.
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