US 12,305,633 B2
Pump
Kousei Houguchi, Tokyo (JP)
Assigned to NITTO KOHKI CO., LTD., Tokyo (JP)
Filed by NITTO KOHKI CO., LTD., Tokyo (JP)
Filed on Mar. 9, 2023, as Appl. No. 18/181,097.
Application 18/181,097 is a continuation of application No. PCT/JP2021/018447, filed on May 14, 2021.
Claims priority of application No. 2020-161170 (JP), filed on Sep. 25, 2020.
Prior Publication US 2023/0213028 A1, Jul. 6, 2023
Int. Cl. F04B 49/02 (2006.01); F04B 17/03 (2006.01); H02K 5/04 (2006.01); H02K 7/14 (2006.01); H02K 11/25 (2016.01)
CPC F04B 49/02 (2013.01) [F04B 17/03 (2013.01); H02K 5/04 (2013.01); H02K 7/14 (2013.01); H02K 11/25 (2016.01); F04B 2203/0405 (2013.01)] 5 Claims
OG exemplary drawing
 
1. 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.