PURPOSE: To provide a discharge pump for concrete cutter which employs a light-weight generator and is highly efficient.
CONSTITUTION: A discharge pump for concrete cutter is provided with a cylinder 11, a hollow piston 12 which is provided in the cylinder 11 with a sufficient gap between inner walls of the cylinder, a seal member 13 whose tip contacts outer wall of the hollow piston 12 and which shuts off a flow passage which is formed between the cylinder 11 and the hollow piston 12, a suction valve 14 which forms the flow passage by opening and closing a hollow section of the hollow piston 12 when the hollow piston 12 reciprocates, and a discharge valve 16 which is inserted into a piston rod 15 and opens and closes a discharge passage in conjunction with the piston rod 15.
| JPH11257174 | FUEL PUMP DEVICE |
| JPH05196151 | SEATED VALVE |
YOKOYAMA TSUGIO
MOROOKA YOSHIHIDE
TAKAHASHI MASAMI
| JPS6119983A | 1986-01-28 |