Electricity: electrothermally or thermally actuated switches – Electrothermally actuated switches – With bimetallic elements
Reexamination Certificate
2007-12-04
2007-12-04
Vortman, Anatoly (Department: 2835)
Electricity: electrothermally or thermally actuated switches
Electrothermally actuated switches
With bimetallic elements
C337S110000, C337S097000
Reexamination Certificate
active
11179141
ABSTRACT:
An enclosed motor protector has a housing formed by a base (10) and a cover (12) received on the base and enclosing a recess (10a) formed in the base. A first terminal (14) extends through an opening in the housing and mounts a stationary contact (14c) within the recess. An elongated movable contact arm (18) is cantilever mounted at one end in the recess and mounts a second movable contact (18a) on a free end of the arm which is adapted to move into and out of engagement with the stationary contact. A heater (20) is mounted in the recess in heat transfer relation with a snap acting thermostatic disc (22) disposed adjacent to the movable contact arm so that upon reaching a preselected temperature the disc will snap from one dished configuration to an opposite dished configuration with its motion transferred to the movable contact arm to move the contacts out of engagement. The cover is formed with a first multiple wall barrier (122) in the form of a triangular body when seen in a lateral cross section closing a first terminal receiving opening and a second multiple wall barrier (124) closing a second terminal receiving opening to interrupt the travel of arcs and the inlet of explosive gas to the enclosure. These features also diminish air supply in the enclosure to thereby weaken any combustion.
REFERENCES:
patent: 3452313 (1969-06-01), Perry
patent: 3564185 (1971-02-01), Bauer
patent: 3579167 (1971-05-01), Grable
patent: 3590174 (1971-06-01), Williams, III
patent: 3601568 (1971-08-01), Sorenson
patent: 3959762 (1976-05-01), Senor
patent: 4551701 (1985-11-01), Ubukata et al.
patent: 4555686 (1985-11-01), Pejouhy et al.
patent: 4701824 (1987-10-01), Beggs et al.
patent: 4706152 (1987-11-01), DeFilippis et al.
patent: 4780697 (1988-10-01), Cobb et al.
patent: 4812799 (1989-03-01), Cobb et al.
patent: 4827233 (1989-05-01), Cobb, III
patent: 4837545 (1989-06-01), Cobb et al.
patent: 4937548 (1990-06-01), Sdunek
patent: 5107241 (1992-04-01), Ubukata et al.
patent: 0 773 560 (1997-05-01), None
patent: 0 890 967 (1999-01-01), None
patent: 1 567 567 (1980-05-01), None
patent: 2063566 (1981-06-01), None
patent: 2002260507 (2002-09-01), None
Brodeur Russell P.
Lim Adrian W.
Baumann Russell E.
Sensata Technologies, Inc.
Vortman Anatoly
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