Overcenter mechanism for a pressure powered pump

Details Overcenter mechanism for a pressure powered pump Overcenter mechanism for a pressure powered pump

1995-12-29

1999-08-24

Thorpe, Timothy S.

Pumps

One fluid pumped by contact or entrainment with another

Liquid pumped by supplying or exhausting gaseous motive...

417131, 417134, F04F 106

Patent

active

059416912

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.

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