| 摘要 |
<p>1,162,483. Marine propellers. ERIKSBERGS MEK. VERKSTADS A.B. 2 April. 1968, No. 15761/68. Heading B7V. A marine propeller 1 has a boss 3 provided with a tapering bore 4 to fit the tapering end 5 of a propeller shaft 2, in which boss is cast a passage 7 for a heating fluid, the inlet and the outlet 8, 9 of the passage being radially arranged and directed toward the external surface of the boss between its inner and outer ends. The passage may comprise loops, or, as shown, may follow a helical path.</p> |
