| 摘要 |
1448910 Brake valves WABCO WESTING- HOUSE 23 Dec 1974 [28 Dec 1973] 55589/74 Headings F2F and F2V A dual circuit valve assembly for use for example in controlling heavy vehicle front and rear brakes independently comprises a central operating part capable of transmitting a controlling force to a cross-member 19, which rests at each side on a tappet or plunger 6 of a valve 2, 3, in a direction opposite to reaction pistons formed by pistons 4 each containing a tube 5 which can engage a valve member 7 there being provided a pre-loaded helical compression spring 21 between the cross-member and each tappet and a rod or bolt 28 passing through an opening in the member 19, fixed to the body 1 and having a head 27 to provide a lateral guide for movement of the member 19 and limiting the maximum value of the force transmitted by cross-member 19 to each tappet. A brake lever 11 pivoting on an axle 12 contacts, through a finger 13 a thrust plunger 14 running through a spring 15 enclosed within cups resting on a tappet 16 which rests on a member 18 interposed between the tappet and cross-member 19. |
