Fluid handling – Inflatable article – With pressure-responsive pressure-control means
Patent
1990-02-20
1991-07-09
Rivell, John
Fluid handling
Inflatable article
With pressure-responsive pressure-control means
1374933, 1374936, 1374939, F16K 1520, F16K 1726
Patent
active
050296043
ABSTRACT:
A safety core (10) for a tire valve comprises a head portion (12) screwed into the valve's housing (28) so that it is sealed against the inner wall of the housing by compressing a seal ring (36) located in an annular groove (34) formed in a tapered portion (32) of the head part. Inserted into the head part is a cylindrical body (14) which contains a ball-type check valve (20). A ball (84) of the valve is constantly pressed to a seat (80) installed on the rear end of an adjustment pipe (16), the latter being screwed into the rear end of the body (14). The rear end protrudes through the head portion (12) and has a stop (58) on its end. A spring (62), located between the stop (58) and the outer end face of the head portion (12), constantly urges the front end of the head portion (12) to a valve seat formed on a shoulder (68) of a large-diameter portion (66) of the cylindrical body. A spring (86), which keeps the check valve normally in a closed state, is adjusted to a predetermined maximum allowable pressure of the tire. When this pressure is exceeded, e.g., because of an extraordinary load, sustained high-speed drawing, or high temperature, the air in the tire opens the check valve and is released through gaps in the safety core.
REFERENCES:
patent: 1335976 (1920-04-01), Leach
patent: 1934572 (1933-11-01), Sutton
patent: 2254655 (1941-09-01), Hollowell
patent: 2517917 (1950-08-01), Payne
patent: 2606570 (1952-08-01), Buenik
patent: 3450147 (1969-06-01), Webb
Gozokhovsky Mark
Spektor Semyon
Zhabokrug Ilya
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