Patent GB-474304-A (GB)
Title: Improved device for stabilising vehicles in particular, motor vehicles
IPC: A01F29/10
Filed: 1936-05-01
Abstract: 474,304. Vehicle stabilizing-devices; hydraulic springs. HOME, H. May 1, 1936, No. 12455. Convention date, May 6, 1935. [Classes 108 (ii) and 108 (iii)] In stabilizing-devices for road vehicles having stabilizing means mounted on both sides of the vehicle, a portion of the difference of the spring movement on both sides of the vehicle is taken up by a supplementary device and only when the difference exceeds a certain amount does the stabilizing-device stabilize the vehicle. As shown in Figs. 1 and 3, devices 2, 4 are mounted on the sides of the vehicles and connected to the springs 5 by rods 9, 45 (which in Fig. 3 are shown out of their parallel pendant positions). If the rod 9 is moved upwardly by the vehicle wheel passing over an elevation on the road, the spindle 11 is moved clockwise causing the piston 14 to move to the left. The liquid in space 16 then passes into space 18 of the supplementary device and the piston 54 moves to the right against the pressure of the spring 21 and the liquid from the space 23 passes into space 22 through spring-pressed valve 27. The pressure in space 18 is also transmitted by pipe 41 to space 42 but for small pressures does not overcome the spring-pressed valve 43 to move the piston 46 and consequently the wheel corresponding to rod 45 is not acted upon. If, however, the rod 45 is raised by its wheel, liquid is forced out of space 47 through pipe 50 into space 23, the liquid from space 18 passing through pipe 41 to space 42, thence through the spring-pressed valve 43 into space 51, the rod 9 meanwhile not being acted upon. Figs. 5 and 6 show a modification in which the pistons 14, 46 are replaced by rotary vanes 56, 64. As before, upward movement of the rod '9 causes vane 56 to move to the left forcing liquid through pipe 58 to the left-hand side of the supplementary piston 19 which consequently moves to the right and the liquid in space 60 passing through pipe 61 and spring-pressed valve 69 in space 63. Similar operations occur when rod 45 is moved upwardly. If, however, the body rotates to the right in its longitudinal axis, say in cornering, rod 9 moves upwardly and rod 45 downwardly, both movements causing liquid to be displaced into space 59 and moving piston 19 to the right, the liquid in space 60 being displaced into spaces 63, 65. When this occurs, movement of the piston 19 continues until balanced by the spring in space 60 and no further rotational movement of the body can take place, the same spring returning the body to normal position when the centrifugal force on the body is relieved. Fig. 9 shows an arrangement employing two cylinders 72 ... 75 with pistons at each side and the operation of the supplementary piston 19 is similar to the other modifications. In the pipe 90, however, is arranged a spring-pressed plunger 91 adapted to cut out the operation of the supplementary piston 19 by a plunger 97 acting on pressure fluid in cylinder 96 and if desired the device may be operated by the driver. Other means for cutting out the supplementary device by the driver are described including electrical means.