| 摘要 |
640,418. Hinges. THOMPSON PRODUCTS, Inc. March 13, 1948, No. 7712. Convention date, Oct. 24. 1947. [Class 65(ii)] [Also in Group XXXI] A swivel joint comprises a stud having a tapered head 29c and a cylindrical shank 29d, and a housing having a tapered bearing portion 30 for the head, a cylindrical bearing portion 31 for the shank, and a lubricant reservoir 32. having a passage 33 communicating externally, between said bearing portions. A spring, 37, bearing upon a dust cap 35, urges the head against its bearing portion. |
