| 摘要 |
<p>536,758. Valves. FIRESTONE TIRE & RUBBER CO. Aug. 15, 1940, No. 13066. Convention date, March 23. [Class 135] [Also in Group XXXIV] In a pneumatic tyre comprising an inner chamber 12, Fig. 2, separated from the normal tread-bearing chamber 13 by a diaphragm 11, both chambers being simultaneously inflated through a common valve, the diaphragm is fitted with a rubber &c. valve 17 which permits free communication whilst the chambers are at substantially equal pressures but automatically restricts the air-flow on a pressure-difference in the chambers. As shown, the diaphragm valve comprises a tubular nipple with an oval mouth 20, Figs. 4, 5, or a notched mouth 22, Fig. 6, in which case the stem-portion 21 may be formed with ribs 24 (or grooves) to prevent complete closure on collapse of the outer chamber 13.</p> |
