Overcenter mechanism for a pressure powered pump
US5941691A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 29, 1995 |
| Grant date | Aug 24, 1999 |
| Priority date | — |
| Expiry date | Dec 29, 2015 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16T1/24
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A pressure powered pump has valve members 18, 20 operated by a float acting through an overcenter mechanism 24. The overcenter mechanism has a valve actuating lever 36, on which are provided actuating pins 46, 48 for engagement with the respective valve members 18, 20. When the valves are closed, there is a substantial clearance a between the actuating pins 46, 48 and the respective valve member or its stem 50. This causes the actuating pin 46, 48 to apply an impact to the-valve member 18, 20, so assisting its opening movement. Stops 58, 60 are provided to arrest the valve actuating member 36 at its stable end position, so avoiding high impacts being applied to the valve members 18, 20 when they close.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.