| 摘要 |
697,233. Shores. KWIKFORM, Ltd. May 1, 1951 [May 8, 1950; Feb. 21, 1951], Nos. 11336/50 and 4170/51. Class 20(ii) An adjustable shore comprises a member 10 on which screws a nut 13 rotatably connected with a thrust member 19 for engaging the ground &c., another thrust member 25 non-rotatably connected with a member 11 adjustable inside the member 10 by means of a pin 32 and apertures 30, 31 in the two members, the final clamping adjustment being produced by turning the nut 13 relatively to the member 10 by means of the handle, 28. The nut 13 is welded to tubes 15, 16 protecting the thread on the tube 10 and forming the rotatable connection with the thrust member 19. Complete withdrawal of the member 11 is prevented by rings 34, 35, on the two members or as shown in a modification the opposite ends of the members 10, 11 may be contracted and expanded respectively. In a further modification the nut engages a screw thread on the inner member 11 and the member 10 is correspondingly shortened and connected to the non-rotatable thrust member. |
