| 摘要 |
A power transfer unit for transferring power between two separate hydraulic circuits comprising a casing, a pair of cylinder blocks in the casing, cylinders within each cylinder block, a piston in each cylinder, a leakage chamber within the casing, cam means located in said chamber for causing joint reciprocation of the pistons, pistons or extensions thereof extending from the cylinders to the cam means in the chamber, first valve means co-operating with the cylinders of the first block, second valve means co-operating with the cylinders of the second block, first leakage collecting means for the first valve means separate from said chamber, second leakage collecting means for the second valve means separate from said chamber, and a vent for said chamber separate from said leakage collecting means.
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