Stand mixer with mechanism to lift head

1. A stand mixer, comprising:

a lower assembly comprising a base and a lower support arm assembly extending upwardly from the base;

an upper assembly comprising a generally horizontal head positioned above the base and an upper support arm assembly extending downwardly from the head, the lower and upper support arm assemblies forming a generally vertical support arm, the head configured to provide a mounting location for a beater;

a head-raising mechanism that moves the head relative to the base between raised and lowered positions, the head remaining generally horizontal in the raised position; and

a motor mounted in the lower assembly, a drive train mounted in the upper assembly operatively connected to the beater, a coupling mechanism that couples the drive train to the motor in the lowered position.

2. The stand mixer defined in claim 1 , wherein the coupling mechanism comprises a lower clutch mounted to the motor and an upper clutch mounted to the drive train.

3. The stand mixer defined in claim 1 , wherein the coupling mechanism comprises a sleeve mounted to one of the lower and upper support arms and a rod configured for insertion into the sleeve mounted to the other of the lower and upper support arms.

4. The stand mixer defined in claim 1 , wherein the head-raising mechanism comprises a cam pivotally attached to one of the upper and lower support arm assemblies that bears against the other of the upper and lower support arm assemblies.

5. The stand mixer defined in claim 1 , wherein the head-raising mechanism comprising a toothed rack mounted to the lower support arm assembly and a pinion pivotally mounted to the upper support arm assembly that meshes with the toothed rack.

6. The stand mixer defined in claim 1 , further comprising a lift-assist unit that assists the upper assembly to move to the raised position.

7. The stand mixer defined in claim 6 , wherein the lift-assist mechanism comprises a helical spring.

8. The stand mixer defined in claim 6 , wherein the lift-assist mechanism comprises a pneumatic cylinder.

9. A stand mixer, comprising:

a lower assembly comprising a base, a lower support arm extending upwardly from the base, and a motor;

an upper assembly comprising a generally horizontal head positioned above the base and an upper support arm extending downwardly from the head, the lower and upper support arm assemblies forming a generally vertical support arm, the head configured to provide a mounting location for a beater;

a drive train mounted in the upper assembly operatively connected to the beater;

a head-raising mechanism that moves the head relative to the base between raised and lowered positions, the head remaining generally horizontal in the raised position; and

a coupling mechanism that couples the drive train to the motor in the lowered position and decouples the drive train from the motor in the raised position.

10. The stand mixer defined in claim 9 , wherein the coupling mechanism comprises a lower clutch mounted to the motor and an upper clutch mounted to the drive train.

11. The stand mixer defined in claim 9 , wherein the coupling mechanism comprises a sleeve mounted to one of the lower and upper support arms and a rod configured for insertion into the sleeve mounted to the other of the lower and upper support arms.

12. The stand mixer defined in claim 9 , wherein the head-raising mechanism comprises a cam pivotally attached to one of the upper and lower support arm assemblies that bears against the other of the upper and lower support arm assemblies.

13. The stand mixer defined in claim 9 , wherein the head-raising mechanism comprising a toothed rack mounted to the lower support arm assembly and a pinion pivotally mounted to the upper support arm assembly that meshes with the toothed rack.

14. The stand mixer defined in claim 9 , further comprising a lift-assist unit that assists the upper assembly to move to the raised position.

15. The stand mixer defined in claim 14 , wherein the lift-assist mechanism comprises a helical spring.

16. The stand mixer defined in claim 14 , wherein the lift-assist mechanism comprises a pneumatic cylinder.

17. A stand mixer, comprising:

a lower assembly comprising a base, a lower support arm extending upwardly from the base, and a motor;

an upper assembly comprising a generally horizontal head positioned above the base and an upper support arm extending downwardly from the head, the lower and upper support arm assemblies forming a generally vertical support arm, the head configured to provide a mounting location for a beater;

a drive train mounted in the upper assembly operatively connected to the beater;

a head-raising mechanism that moves the head relative to the base between raised and lowered positions, the head remaining generally horizontal in the raised position, the head-raising mechanism comprising a cam pivotally mounted to the upper support arm assembly that bears against the lower support arm assembly; and

a coupling mechanism that couples the drive train to the motor in the lowered position and decouples the drive train from the motor in the raised position.

18. The stand mixer defined in claim 17 , wherein the coupling mechanism comprises a lower clutch mounted to the motor and an upper clutch mounted to the drive train.

19. The stand mixer defined in claim 17 , wherein the coupling mechanism comprises a sleeve mounted to one of the lower and upper support arms and a rod configured for insertion into the sleeve mounted to the other of the lower and upper support arms.