From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Promotional document explaining the Duodraulic Double Acting Shock Absorber's patented control valves.
| Identifier | ExFiles\Box 28\1\ Scan179 | |
| Date | 13th December 1930 guessed | |
| Piston Clce .003 X832 ILLUSTRATING SIMPLICITY OF DESIGN. MOVING PARTS OPERATE IN BATH OF OIL. DOWNWARD CONTROL VALVE (PATENTED) UPWARD CONTROL VALVE The ideal control of spring action, both downward and upward, is accomplished through the application of the hydraulic principle, using a special oil of low viscosity. An exclusive feature of the Duodraulic is the patented Lovejoy relief valving which gives separate and independent valve adjustment for both upward and downward control of the spring action. Once properly installed, to meet the requirements of the individual car and the preferences of its owner, Lovejoy Duodraulics remain in permanent adjustment—winter and summer. Duodraulic piston and cylinder design, while more costly to manufacture, results in the advantages of unvarying efficiency and long life. Duodraulic Double Acting Shock Absorbers are engineered and built for those who want the finest shock absorbing equipment it is possible to obtain. | ||