Hydraulic transmission
AssigneesDana E. Keech, Ronald S. Mullisen
InventorRoger A. Keech
Life of this patent
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Abstract
A co-axial co-planar combined hydraulic vane pump and motor having an interposed annular unitary common connecting element functioning as both pump stator and motor rotor and subject to manipulation as a unit to vary the speed ratio between said pump and motor while presenting continuous smooth annular surfaces interiorly to the pump vanes and exteriorly to the motor vanes. At the same time said novel common element presents unbroken annular polar sealing faces to the confining end walls of the main transmission operating chamber.
Claims8
In a co-axial co-planar combined central hydraulic radial vane pump and peripheral hydraulic radial vane motor functioning in a common cylindrical chamber to form a hydraulic positive displacement power transmission, the combination of:
- a flexible, unitary annular common element interposed within said chamber to surround and be engaged by the vanes of said pump and be surrounded and engaged by the vanes of said motor;
- said element having continuous internal and external annular surfaces continually engaging the vanes respectively of said pump and said motor;
- said element having continuous parallel polar surfaces making continuous sealing engagement respectively between each of said polar surfaces and one of the end faces of said chamber,
- co-axial drive and driven shafts connected respectively to said pump and said common element;
- and
- means operable through said driven shaft to flex the material of said common element to coordinately modify said continuous annular internal and external surfaces thereof and thereby convert said transmission from one drive ratio to another.
An endless integrally bonded common element adapted to jointly function in a common cylindrical chamber as the co-planar co-axial stator of an axial vane pump rotor and as the co-planar co-axial rotor of a peripheral vane motor stator,
- said element having continuous internal and external radial vane engaging annular surfaces,
- said element having continuous parallel polar surfaces approximately co-planar with the end faces of said chamber,
- said element having nodal imperforate fluid sealing areas and, interspersed therebetween, radial fluid, suction and discharge ports.
Dependencies are inferred from the claim text.