Pumps – Condition responsive control of drive transmission or pump... – Disconnectable drive element
Reexamination Certificate
2006-04-25
2006-04-25
Freay, Charles G. (Department: 3746)
Pumps
Condition responsive control of drive transmission or pump...
Disconnectable drive element
C417S270000, C417S319000, C417S440000, C417S490000
Reexamination Certificate
active
07033143
ABSTRACT:
This invention relates to a pumping system. The design of the system is such that bi-directional operation can be achieved using a significantly smaller and hence lighter unit than those currently available. It uses the direction of rotation of the drive shaft to control the opening and closure of the by-pass means for controllably returning the fluid to the first reservoir.
REFERENCES:
patent: 6179574 (2001-01-01), Yie
patent: 924674 (1963-05-01), None
patent: WO 99/01338 (1999-01-01), None
Bennett Mark Arwyn
Mead Colin Andrew
Parsons Alan Thomas
Pointer Stephen Arthur
Boehnen McDonnell
Dwivedi Vikansha
Freay Charles G.
Hulbert & Berghoff LLP
QinetiQ Limited
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