Toaster oven control knob and method of controlling a toaster oven

Patent metadata

Field	Value
Publication number	US-10327591-B2
Application number	US-201615181662-A
Country	US
Kind code	B2
Filing date	Jun 14, 2016
Priority date	Aug 25, 2015
Publication date	Jun 25, 2019
Grant date	Jun 25, 2019

Abstract

A toaster oven comprising a housing defining a food cavity, an opening defined in the housing, a door movably affixed to the housing, a cooking grid selectively mountable within the housing, one or more heating elements within the housing, a timer controlling activation of the heating elements, and a timer control knob engaged with the timer. The timer control knob is selectively rotatable in a second direction from the off position to a third position to activate at least one of the one or more heating elements until the timer control knob is selectively rotated in the first direction back to the off position. The timer control knob has a selectively movable button, such that the timer control knob is only selectively rotatable in the second direction from the off position to the third position when the button is moved from a first position to a second position.

First claim

That which is claimed:

1. A toaster oven comprising:
a housing defining a food cavity;
an opening defined in the housing to enable access to the food cavity;
a door movably affixed to the housing and selectively movable between a closed position closing off the opening thereby blocking access to the food cavity and an open position enabling access to the food cavity;
a cooking grid selectively mountable within the housing;
one or more heating elements within the housing;
a timer controlling activation of the heating elements; and
a timer control knob engaged with the timer, the timer control knob being selectively rotatable in a first direction from an off position to a second position to set the timer and activate at least one of the one or more heating elements for a desired amount of time corresponding to the second position, the timer control knob being selectively rotatable in a second direction from the off position to a third position to activate at least one of the one or more heating elements until the timer control knob is selectively rotated in the first direction back to the off position, the second direction being opposite the first direction, the timer control knob having a selectively movable button;
wherein the timer control knob is only selectively rotatable in the second direction from the off position to the third position when the button is moved from a first position to a second position.

2. The toaster oven of claim 1 , wherein a stationary block projects from the housing;
wherein the timer control knob comprises a lock lever engaged with the button such that moving the button moves the lock lever from a first position to a second position;
wherein, in the first position, the lock lever is aligned with the stationary block to prevent rotation of the timer control knob in the second direction from the off position to the third position; and
wherein, in the second position, the lock lever is not aligned with the stationary block to permit rotation of the timer control knob in the second direction from the off position to the third position.

3. The toaster oven of claim 2 , wherein the lock lever is biased to the first position.

4. The toaster oven of claim 2 , wherein the lock lever slides from the first position to the second position.

5. The toaster oven of claim 2 , wherein the selectively movable button comprises a selectively depressible pushbutton.

6. The toaster oven of claim 5 , further comprising one or more guides;
wherein one or both of the pushbutton and the lock lever are slidably engaged with the one or more guides.

7. The toaster oven of claim 5 , further comprising a cam;
wherein the lock lever depends from the cam;
wherein the cam is slidably movable between a first position and a second position; and
wherein the cam and the pushbutton have correspondingly angled mating surfaces such that selectively depressing the pushbutton slidably moves the cam in a different direction than the pushbutton and therefore moves the lock lever from the first position to the second position.

8. The toaster oven of claim 7 , wherein the correspondingly angled mating surfaces of the cam and the pushbutton are such that selectively depressing the pushbutton slidably moves the cam in a direction perpendicular to the movement of the pushbutton.

9. The toaster oven of claim 7 , further comprising a support post;
wherein the cam is slidably engaged with the support post.

10. The toaster oven of claim 9 , further comprising a biasing spring encircling the support post;
wherein the biasing spring biases the cam toward the first position.

11. The toaster oven of claim 5 , wherein the selectively depressible pushbutton is a first selectively depressible pushbutton;
wherein the timer control knob has a second selectively depressible pushbutton opposite the first selectively depressible pushbutton;
wherein the timer control knob comprises a dummy lock lever engaged with the second pushbutton such that depressing the second pushbutton moves the dummy lock lever from a first position to a second position;
wherein the dummy lock lever does not engage the stationary block in the first position or in the second position.

12. The toaster oven of claim 2 , wherein the selectively movable button comprises a selectively slidable switch, the switch being slidably movable between a first position and a second position; and
wherein the lock lever depends from the switch.

13. The toaster oven of claim 12 , further comprising a support post;
wherein the lock lever is slidably engaged with the support post.

14. The toaster oven of claim 13 , further comprising a biasing spring encircling the support post;
wherein the biasing spring biases the lock lever toward the first position.

15. The toaster oven of claim 2 , wherein the stationary block is sized and positioned such that, when the knob is in the third position, the lock lever is prevented from returning to the first position.

16. The toaster oven of claim 2 , wherein the lock lever has an angled surface that engages with the stationary block as the timer control knob is rotated from the third position in the first direction, such engagement pushing the lock lever from the first position to the second position to permit rotation of the timer control knob in the first direction back to the off position without depressing the pushbutton.

17. The toaster oven of claim 2 , wherein the lock lever has a planar leading edge that is substantially perpendicular to a corresponding engaging edge of the stationary block.

Assignees

• Hamilton Beach Brands Inc

Inventors

• Starr William D

Classifications

• G05G1/08

  Controlling members for hand actuation by rotary movement, e.g. hand wheels · CPC title

• A47J37/0629 Primary

  with electric heating elements · CPC title

• G05G5/005

  for preventing unintentional use of a control mechanism (G05G5/28 takes precedence) · CPC title

• A47J37/0842 Primary

  with electronic timers · CPC title

• A47J37/0814

  with automatic bread ejection or timing means (A47J37/0857 takes precedence) · CPC title