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).
Description of the operation of a hydraulic piston mechanism, likely for a suspension damper.
| Identifier | ExFiles\Box 28\1\ Scan091 | |
| Date | 22th June 1926 guessed | |
| -14- A is the high pressure side of the piston. When the piston moves towards A, in other words, when the axle moves away from the frame and the road spring rebounds, oil is forced out through the high pressure valve a' and via the passage C, to the low pressure side B, of the piston. Passage C, is shewn as an external pipe for the sake of clearness, actually it is contained in the casting. When the axle moves towards the buffer the piston moves to the low pressure side B, and the oil being unable to pass the high pressure valve a' which is non-return, flows through the low pressure passage D in the piston and past the low pressure valve b', thus again force filling the high pressure side of the piston. A number of refinements are incorporated in the design which are not shewn in the diagram, among them a means of replenishing both sides of the piston from the reservoir R; | ||