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(11) | EP 0 143 521 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Pump having piston and cylinder rotatable respectively about spaced axes transverse to the reciprocating axis |
| (57) A pump assembly (10) including a piston (12) connected to a rotating wheel (30) by
a pin (32) radially offset from the axis of rotation of the wheel and a cylinder (14)
in reciprocating telescoping relationship with the piston (12) and supported by a
hollow shaft (26) for rotation in a housing member (24) so that the piston (12) rotates
about the axis of a supporting shaft (22) extending transversely to the reciprocating
movement while the cylinder (14) rotates about another axis transverse to the reciprocating
movement with the distance between the two axes being adjustable to vary the displacement
of the pumping chamber (16) between zero when the two axes coincide to a maximum degree
when the two axes are spaced the maximum amount. The housing (24) rotatably supporting
the hollow shaft (26) of the cylinder (14) includes two fixed fluid ports (50, 52)
which alternately communicate with an axially aligned radial port (48) in the hollow
shaft (26). |