| 摘要 |
535,164. Pneumatic tyres. UNITED STATES RUBBER CO. Feb. 15, 1940, No. 2896. Convention date, March 8, 1939. Addition to 522,188. [Class 144 (ii)] The slits 6 within the ribs 4 of a tyre tread are now arranged obliquely to the tyre axis. The slits, which are preferably omitted from the extreme shoulder ribs, may terminate above or bellow the bottoms of the grooves between the ribs. As shown, the slits in adjacent ribs may be oppositely inclined.
|
