Combined timing gear and pump for rotary mechanisms
US4008987A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 7, 1976 |
| Grant date | Feb 22, 1977 |
| Priority date | — |
| Expiry date | Jan 7, 1996 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01C21/04
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A rotary mechanism including a housing defining an operating chamber, a shaft journalled in the housing and having an eccentric within the chamber, a rotor within the chamber and journalled on the eccentric, a timing gear carried by the housing and within the chamber and having a predetermined number of teeth, an internal ring gear carried by the rotor and meshed with the timing gear, the ring gear having a number of teeth greater than the predetermined number of the timing gear whereby a crescent-shaped gap between the gears exist. A crescent-shaped pad is carried by the eccentric within the gap and an inlet port is provided in the eccentric adjacent one corner of the pad for supplying hydraulic fluid to the gap. An outlet port is located in the eccentric adjacent the other corner of the pad for conveying pressurized hydraulic fluid to a point of use within the mechanism. The invention provides high pressure hydraulic fluid through unique use of the timing and ring gears necessary in such mechanisms.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.