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US 12,305,633 B2Granted
Pump
AssigneeNitto Kohki Co., Ltd.
InventorKousei Houguchi
Life of this patent
Estimating the term…
Abstract
The pump has an electromagnet for reciprocating a piston, and a first casing member at least partially accommodating the piston and the electromagnet. The electromagnet has a stator core and coils wound around the stator core. The pump further includes a thermal protector disposed on the stator core. The thermal protector is held between the casing member and the stator core. When the thermal protector detects that the stator core has heated up above a predetermined temperature, the supply of electric power to the electromagnet is interrupted to stop the drive of the piston.
Claims5
A pump comprising:
- a reciprocating pumping member;
- an electromagnet having a stator core and a coil wound around the stator core, the electromagnet being configured to reciprocate the reciprocating pumping member by electromagnetic force;
- an overheat detection element disposed on the stator core;
- a casing member at least partially accommodating the reciprocating pumping member and the electromagnet;
- and
- an elastic retaining member attached to the casing member at a position facing the stator core, the elastic retaining member having a groove for retaining the overheat detection element,
- wherein the overheat detection element and the elastic retaining member are held between and sandwiched by the stator core and the casing member such that the overheat detection element is retained in the groove of the elastic retaining member and the elastic retaining member is compressed between the casing member and the overheat detection element, thereby pressing the overheat detection element against the stator core by elastic force of the elastic retaining member,
- wherein when the overheat detection element detects that the stator core has heated up above a predetermined temperature, drive of the reciprocating pumping member is stopped.
5 more elements
Dependencies are inferred from the claim text.