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US 6,664,487 B2Granted
Limit switches
AssigneeOMRON Corporation
InventorsHidemitsu Takenaka, Hiroyuki Kaijo, Tetsuhiko Miyoshi
Life of this patent
Estimating the term…
Abstract
A limit switch has switch areas and a partition wall in between in a switch case for containing switch element units separately and independently. An inner case includes covers for sealing the switch areas. For improving rigidity, a switch unit and a head unit which operates the switch unit are connected by means of a protrusion on one of them and an indentation on the other of them, the protrusion and the indentation being engaged in an embracing fashion for strength.
Claims22
A limit switch comprising:
- an inner switch having a plurality of switch element units;
- and
- an inner case containing said inner switch, said inner case having covers and a switch case including a partition wall and independently provided switch areas which sandwich said partition wall in between, said switch element units being distributed individually into said switch areas, said covers each sealing a corresponding one of said switch areas.
A limit switch comprising:
- a switch unit;
- a head unit which operates said switch unit;
- a protrusion on either one of said switch unit and said head unit;
- and
- an indentation on the other of said switch unit and said head unit, said head unit being connected to said switch unit by engaging said protrusion with said indentation;
- wherein said switch unit comprises a switch main body having shoulders, said protrusion being formed by steps at said shoulders, said head unit having a head case with two legs protruding to form said indentation therebetween.
3 more elements
A limit switch comprising:
- a switch unit;
- a head unit which operates said switch unit;
- a protrusion on either one of said switch unit and said head unit;
- and
- an indentation on the other of said switch unit and said head unit, said head unit being connected to said switch unit by engaging said protrusion with said indentation;
- wherein said head unit includes a head case and a rotary shaft rotatably supported by said head case, said head case displaying two or more set zones, said rotary shaft having a zone indicator for selectively indicating one of said set zones.
3 more elements
A limit switch comprising:
- a switch unit;
- a head unit which operates said switch unit;
- a protrusion on either one of said switch unit and said head unit;
- and
- an indentation on the other of said switch unit and said head unit, said head unit being connected to said switch unit by engaging said protrusion with said indentation;
- wherein said head unit includes an actuator for operating said switch head, said actuator comprising:
- a roller for a mobile member to contact;
- a lever supporting said roller, said lever tilting when said mobile member contacts said roller;
- and
- a weight on said lever opposite to said roller.
7 more elements
Dependencies are inferred from the claim text.