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专利名称：SHOCK ABSORBING MOUNTINGS申请号：AU3786672申请日：19720113公开号：AU4741B2公开日：19750904
摘要：1377221 Highway crash barriers DUNLOP Ltd 13 Jan 1972 [16 Jan 1971] 2202/71Heading E1G [Also in Division F2] A shock absorbing device for mounting a highway crashbarrier (not shown) comprises a deformable member (ductile steel tube 30 or tubes 7, 8or plates 17), and a primary deforming means (plunger 5 with enlarged head 6 or ball-bearings 16) and a secondary deforming means (a rigid sleeve 31 surrounding and movingwith the plunger or a sleeve 9a, 10a or layer 19 of elastomeric material) acting onopposite surfaces of the deformable member. A shock load applied to the device causesthe deformable member to be deformed by the primary deforming means andsubsequently redeformed by the secondary deforming means. In Fig. 1, an axial shockload causes the head 6 of the plunger 5 to deform the tubes 7, 8. Since the elastomericsleeve 9a, 10a is confined and therefore substantially incompressible, as the plungermoves on and forms another bulge in the tubes 7, 8, the preceding bulge is forced out bythe elastomeric sleeve 9a, 10a. On a transverse load ball bearings 16 deform a plate 17,which is re-deformed by the elastomeric layer 19. In Fig. 3, the head 6 of the plunger 5expands the ductile tube 30 and then the tapered end of the sleeve 31 squeezes it backinto shape.
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