Straight-line piston fluid engine with wobble drive valve actuation
OwnerRobert R. Greeninventor
Life of this patent
Estimating the term…
Abstract
An axial piston fluid engine having single-acting cylinders incorporating swivel-joint attachment of the cylinders to rotary control valves wherein straight-line piston movement is established for the elimination of side forces on the pistons. The pistons and the control valves are operatively connected to a common wobble drive member and arranged in geometry of lever positions to coactively time the drive fluid into and out of the cylinders intermittently.
Claims8
An axial piston machine comprising at least one single-acting cylinder assembly in swiveled connection to a control valve assembly;
- the cylinder and the valve connected in pivotal operative relation to a wobble drive means including a crank-pin, an elongate piston arm and an elongate valve lever;
- the arm and lever operating as a unit and disposed relatively on the drive means at substantially right angle to central axis of said wobble drive means whereby, the arranged improvement establishes straight-line motion in a piston reciprocally operated within the cylinder by intermittent, timed porting of fluid into and out of the cylinder for providing rotary energy in a main-shaft.
An axial piston machine comprising a plurality of single-acting cylinder assemblies including means establishing straight-line piston movement, a swivel-joint means mounting said cylinders in operative relation to valve assemblies;
- said valve assemblies having control means for porting fluid to and from the cylinders for reciprocally operating a piston within each said cylinder, said piston and valve being operatively connected to a wobble drive means;
- said wobble drive means including a central pivot supported on the center axis of the machine, a wobble drive member supporting a crank-pin rotatably attached to a central main shaft at a predetermined angle through a journaled bell crank, an elongate piston arm and an elongate valve lever operatively corresponding to each valve and cylinder assembly;
- said arm and lever disposed relatively on said wobble drive member at substantially right angles for providing sequential movement wherein, the valve and piston movements are mutually exclusive;
- the improvement includes flexible independent cylinder assemblies combined with a predetermined geometry of coacting valve levers and piston arms wherein the arrangement establishes straight-line motion in said piston reciprocally operated within the cylinders with timed, intermittent porting of fluid into and out of the cylinder for providing rotary power with economy of structure and reduced friction.
An axial piston machine comprising a plurality of single-acting cylinder assemblies connected by swivel-socket joints to valve assemblies to reciprocate pistons operatively connected to a centrally secured wobble drive means;
- said wobble drive means including a wobble drive member on the center axis of the machine by which a crank pin is operatively journaled to a main shaft at a predetermined angle within a bell crank;
- said crank pin being operationally secured to the pivot member supporting an elongate piston arm and an elongate valve lever corresponding to each said cylinder assembly in paired concurrence;
- the paired arms and levers attached perpendicular on said wobble drive member and operationally disposed relatively on the drive member at substantially right angles and linked to said valves and pistons whereby, the arranged improvement establishes intermittent, timed porting of fluid into and out of the cylinder on each power and exhaust stroke of the said piston for producing rotary power with economy of structure and reduced friction.
Dependencies are inferred from the claim text.