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US 5,326,232 AGranted
Two stage pump assembly with mechanical disconnect
AssigneeGeneral Motors Corporation
InventorsDavid A. McDonnel, Karl L. Swartout
Life of this patent
Estimating the term…
Abstract
A two stage main pump has a first pump portion that is drivingly connected to an input shaft and a second pump that is drivingly connectable with the input shaft by a speed sensitive mechanism. The speed sensitive mechanism is urged by a resilient member to connect the second pump portion with the input shaft as well as to a centrifugal flyweight mechanism that is responsive to the rotary speed of the input shaft in order to urge a disconnection of the second pump from the input shaft.
Claims5
A two stage pump comprising:
- a first pump assembly continuously drivingly connected to a rotatable input shaft;
- a second pump assembly being selectively operable in conjunction with said first pump assembly;
- a selectively operable speed sensitive means having a longitudinal axis and having drive tang means being positionable radially with respect to said longitudinal axis for selectively engaging and disengaging a portion of the second pump assembly for operatively connecting the second pump assembly to the input shaft.
A two stage pump comprising:
- a first pump assembly continuously drivingly connected to a rotatable input shaft;
- a second pump assembly being selectively operable in conjunction with said first pump assembly;
- selectively operable drive control means having a longitudinal axis and having drive tang means being positionable radially with respect to said longitudinal axis for selectively engaging and disengaging a portion of the second pump assembly for operatively connecting the second pump assembly to the input shaft;
- and,
- operating means including a control member movable axially along said longitudinal axis for positioning said drive tang means;
- and,
- means for selectively controlling the axial position of said control member.
4 more elements
Dependencies are inferred from the claim text.