Low-stress cam-driven piston machines
US4048906A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 19, 1969 |
| Grant date | Sep 20, 1977 |
| Priority date | — |
| Expiry date | Mar 19, 1989 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01B1/0648
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A hydrostatic piston-and-cylinder machine includes an array of cylinders and a piston movable in each cylinder, a sinuous cam track and a cam-follower associated with the pistons engaging the cam track in a manner such that the pistons move to and fro along the axes of their cylinders on movement of the cylinder array along the cam track. For the relief of stresses due to high mutual convexity of the cam and cam follower the cam is shaped to give a relatively low velocity change rate for the pistons along the cylinder bores when the cam follower is negotiating the crests of the cam and a relatively high velocity change rate when the cam follower is negotiating the troughs of the cam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.