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US 6,601,882 B1Granted
Door latch mechanism and associated components for a self-cleaning oven
AssigneeEmerson Electric Co.
InventorRonald E. Cole
Life of this patent
Estimating the term…
Abstract
A door latching or locking mechanism or module for a self-cleaning oven includes latching linkage of the door latch module that enables use of lighter duty, less expensive motor. The mechanical advantage and vector optimization of the latching linkage avoids stalling especially from a locked position. The latching mechanism includes a plurality of switches having a corresponding plurality of terminals. The terminals are grouped or ganged to allow connection with a single connector interface. The switches are selectively actuable/de-actuable by a cam and cam plate that utilizes linear motion translated from rotational motion of a driven (motor) to selectively actuate and/or de-actuate the switches.
Claims29
A latch mechanism comprising:
- a rotating member;
- a drive arm having a first end connected to the rotating member and a second end;
- first and second coupling arms each having a first end connected to the second end of the drive arm at an interconnection;
- and
- an L-bracket having a first end rotatably mounted to a first fixed pivot point and having a second end for engaging a latch member;
- wherein a second end of the first coupling arm is connected to the L-bracket, a second end of the second coupling arm is rotatably mounted to a second fixed pivot point, and the interconnection is rotatable around a connecting member that floats in association with movement of the rotating member.
3 more elements
A latch mechanism for a self-cleaning oven comprising:
- a support;
- a rotational member maintained by said support;
- latch linkage maintained by said support and coupled to said rotational member, said latch linkage having a hook on a hook member operative to move into a first position and into a second position during rotation of said rotational member, the latch linkage including a scissors mechanism coupling the rotational member with said hook member, wherein said scissors mechanism comprises (i) a first arm having a first end, (ii) a second arm having a first end, (iii) said first and second arms pivotally connected at said first ends, and (iv) said first arm further having a second end pivotally fixed to said support;
- and
- a drive arm coupled to said rotational member and said pivotal connection of said first ends of said first and second arms.
2 more elements
A latching mechanism for a self-cleaning oven comprising:
- a support;
- a motor maintained on said support;
- a hook member maintained on said support and operative to be in a latched position and an unlatched position;
- and
- latch linkage operatively coupling said motor with said hook member and adapted to actuate said hook member into said latched and unlatched positions, said latch linkage including a scissors mechanism coupling said motor with said hook member, wherein said scissors mechanism comprises (i) a first arm having a first end, (ii) a second arm having a first end, (iii) said first and second arms pivotally connected at said first ends, and (iv) said first arm further having a second end pivotally fixed to said support;
- and
- a drive arm coupled to said rotational member and said pivotal connection of said first ends of said first and second arms.
4 more elements
A self-cleaning oven, comprising:
- a motor operable to rotate a drive member in response to said oven being placed in a self-cleaning mode of operation;
- a latch mechanism movable from an unlatched position to a latched position in response to rotation of said drive member, said latch mechanism including:
- a latch housing;
- a drive link having (i) a first end portion movably coupled to said drive member, and (ii) a second end portion;
- a first link arm having (i) a first end portion pivotally coupled to said latch housing, and (ii) a second end portion pivotally coupled to said second end portion of said drive link;
- a second link arm having (i) a first end portion, and (ii) a second end portion pivotally coupled to said second end portion of said drive link;
- a latch arm having (i) a first end portion having a locking contact portion, and (ii) a second end portion pivotally coupled to said first end portion of said second link arm;
- and
- a swing arm having (i) a first end portion pivotally coupled to said latch housing, and (ii) a second end portion pivotally coupled to said first end portion of said second link arm.
6 more elements
A self-cleaning oven, comprising:
- a motor operable to rotate a drive shaft in response to said oven being placed in a self-cleaning mode of operation;
- a latch mechanism movable between an unlatched position and a latched position in response to rotation of said drive shaft, said latch mechanism including:
- a latch housing;
- a drive link having (i) a first end portion mechanically coupled to said drive shaft whereby rotation of said drive shaft causes movement of said drive link, and (ii) a second end portion;
- a first link arm having (i) a first end portion pivotally coupled to said latch housing, and (ii) a second end portion pivotally coupled to said second end portion of said drive link;
- a second link arm having (i) a first end portion, and (ii) a second end portion pivotally coupled to said second end portion of said drive link;
- and
- a latch arm having (i) a first end portion having a locking contact portion, and (ii) a second end portion pivotally coupled to said first end portion of said second link arm.
5 more elements
Dependencies are inferred from the claim text.