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Saitama, Japan

Trademark
Iwaki Co. | Date: 2016-05-17

Measuring or testing machines and instruments, namely, durability testing apparatus for auxiliary artificial hearts; Medical apparatus and instruments, namely, cardiac function simulators.


Trademark
Iwaki Co. | Date: 2016-04-08

Pumps, namely, pumps as part of machines; centrifugal pumps; compressed air pumps; lubricating pumps; rotary pumps; positive displacement reciprocating pumps; vacuum pumps; pumps for machines.


Trademark
Iwaki Co. | Date: 1991-11-26

PUMPS; NAMELY, CENTRIFUGAL PUMPS, AXIAL FLOW PUMPS, MIXED FLOW PUMPS, ROTARY PUMPS, RECIPROCATING PUMPS AND VACUUM PUMPS; AND BLOWERS; NAMELY, ROTARY BLOWERS, AXIAL FLOW BLOWERS, CENTRIFUGAL BLOWERS, AND TURBO BLOWERS.


Trademark
Iwaki Co. | Date: 1991-12-17

PUMPS; NAMELY, CENTRIFUGAL PUMPS, AXIAL FLOW PUMPS, MIXED FLOW PUMPS, ROTARY PUMPS, RECIPROCATING PUMPS AND VACUUM PUMPS; AND BLOWERS; NAMELY, ROTARY BLOWERS, AXIAL FLOW BLOWERS, CENTRIFUGAL BLOWERS, AND TURBO BLOWERS.


Patent
Iwaki Co. | Date: 2010-10-08

A reciprocating pump introduces a liquid into a pump chamber through a suction valve and discharges the liquid from the pump chamber through a discharge valve by reciprocating movement of a reciprocating member facing the pump chamber. The suction valve and the discharge valve include: a body portion having therein a flow path for a liquid; a valve seat portion provided at an entrance side of the flow path of the body portion and having therein a hole through which the liquid flows; a valving element provided in the body portion and able to open and close the hole of the valve seat portion; and a spring provided in the body portion for pressing the valving element into the hole of the valve seat portion. The spring has projections which are formed on an outer circumferential portion of its surface to project toward the inner wall of the body portion.

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