GB191207101A - Improvements in and relating to Shock Absorbers. - Google Patents

Abstract

7101. Werner, W. A. P. March 22. [Cognate Application, 8729/12.] Composite and pneumatic springs; connexions and attachments applicable generally for tensile and compressive springs. - Relates to shockabsorbers for motor - vehicles of the type described in Specification 20,389/08, and consists in a combination of two pump-cylinders, one of which pumps air into the other which in turn delivers air into a reservoir or to the atmosphere. In the form shown in Fig. 1, the cylinders a, d are arranged side by side on the vehicle frame and communicate at the top through a non - return valve c. A piston - rod b<1> in the cylinder a is connected by a lever f and a resilient link g with the vehicle axle, so that, when this receives a shock, air is driven from the cylinder a through the valve c into the cylinder d by the piston b, which is similar to the piston of a cycle pump. The main cylinder d is provided with an inlet port d<2> communicating with the atmosphere, and with exhaust ports d<1> communicating through a non-return valve with a reservoir from which the horn or other signal may be operated. These ports are so placed that they are covered by the main piston in its normal position and are uncovered only when the pressure in the cylinder d exceeds a certain value. An additional exhaust valve may also be provided, communicating with a separate air reservoir. The piston-rod in the main cylinder is made resilient by forming it of a cylinder h<2> in which works a piston governed by a helical spring, the rod h of this piston being joined to the main piston. The link g connecting the piston b with the axle is also made resilient so that the piston b is inoperative except for larger shocks; and this piston is constantly returned to the retracted position by a helical spring c<1>. In a modification, the piston b discharges air into the main cylinder on the downward stroke; and, in a further modification, the two pistons are arranged in tandem. In the form shown in Fig. 4, which is adapted to be interposed between the ends of the laminar plate springs of a vehicle, the auxiliary cylinder i telescopes into the main cylinder and acts as the main piston. The piston-rod l<1> of the auxiliary cylinder is bolted at its lower end to the outer cylinder. Non-return valves m, m<1>, m<2> are provided in the cylinder i and piston l, so that the relative movements of the two cylinders as the vehicle passes over a rough road serve to draw air in from the atmosphere through the valve m and transfer it in succession through the valves m<1>, m<2>, finally discharging it through holes n, which are arranged to operate in the same manner as the holes d<1> shown in Fig. 1. The piston-rod l<1> in a modification is passed through a stuffing-box in the lower end of the main cylinder and is connected by a lever and suitable links to the part of the vehicle to which the cylinder i is connected.