| 摘要 |
Hydraulic spring drive apparatus comprising: a rotatable cam shaft having fixed thereon a number of cams; a number of rocker arms, one following each cam, each pivotally attached at one end to a pressure bar and at another to an expansible, compressible connecting means in turn connected to a crank p ortion of a crank shaft. The cams, crank shaft, and expansible compressible connecting means are arranged so that a number of connecting means expand ag ainst the compression of one connecting means. The pressure bar is movable t o position the rocker arms for a selected degree of connecting means compres sion.
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