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1. (WO2018205015) HYDROSTATIC VARIATOR BASED ON RADIAL PISTON MACHINES

Pub. No.:    WO/2018/205015    International Application No.:    PCT/CA2018/050528
Publication Date: Fri Nov 16 00:59:59 CET 2018 International Filing Date: Fri May 04 01:59:59 CEST 2018
IPC: F16H 39/28
F01B 13/06
F04B 1/04
F16H 48/18
F16H 61/4035
F16H 61/423
Applicants: KINETICS DRIVE SOLUTIONS INC.
Inventors: DYCK, Gerald
DRIES, Paul
SCHEPER, Derek
SCHEPER, Ron
CZEPAK, John
Title: HYDROSTATIC VARIATOR BASED ON RADIAL PISTON MACHINES
Abstract:
A hydrostatic drive system comprises a housing, two hydrostatic radial piston machines within the housing and fluidly coupled to each other, and an intermediate control plate element common to each of the two hydrostatic radial piston machines. Each of these hydrostatic radial piston machines comprises a radial cylinder block comprising a plurality of bores, a plurality of pistons corresponding to the plurality of bores, a cam ring, two control plate elements in which one of the two control plate elements is the intermediate control plate element, and a plurality of pass through channels in the radial cylinder block. Each of the two control plate elements in each of the two hydrostatic radial piston machines includes a total of at least two control ports. Further, the intermediate control plate element is rotationally fixed in the housing between the radial cylinder blocks in the two hydrostatic radial piston machines. A power split and continuously variable transmission comprising the hydrostatic drive system.