Food product slicer with knife sharpener and associated knife guard

• US 7,134,937 B1
• Filed: 12/19/2005
• Issued: 11/14/2006
• Est. Priority Date: 12/19/2005
• Status: Active Grant

• Current Assignee: Premark FEG LLC (Illinois Tool Works Inc.)
• Original Assignee: Premark FEG LLC (Illinois Tool Works Inc.)
• Inventors: Shariff, Shahram, Chen, Shiyu
• Primary Examiner(s): NGUYEN, DUNG V
• Application Number:
  US11/311,062
• Time in Patent Office: 330 Days
• Field of Search: 451/11, 451/45, 451/57, 451/65, 451/187, 451/193, 451/196, 451/198, 451/224, 451/229, 451/234, 451/293, 451/420, 831/74, 831/741
• US Class Current: 451/11
• CPC Class Codes: B26D 7/12 by sharpening the cutting member
• CPC Class Codes: B26D 7/22 Safety devices specially adapted for cutting machines safety devices in general F16P
• CPC Class Codes: B26D 7/225 for food slicers

Abstract

A food product slicer with a rotatable slicer knife includes a knife sharpener and an associated knife guard assembly with a guard member positioned for protecting the edge of the knife when the sharpener is positioned in its standby, or non-sharpening state.

Claims

1. A slicer for use in slicing a food product, the slicer comprising:

a slicer body;

a slicer knife mounted for rotation relative to the slicer body, the knife having a peripheral cutting edge defining a cutting plane;

a guard assembly connected to the slicer body, the guard assembly including a knife guard member pivotable about a pivot axis between a cutting edge guarding position and a cutting edge sharpening position, the pivotable knife guard member includes a first portion to a first side of the pivot axis and a second portion to a second side of the pivot axis, when in the cutting edge sharpening position the first portion of the knife guard member moves to a first side of the cutting plane and the second portion of the knife guard member moves to a second side of the cutting plane; and

a sharpener assembly mounted proximate the guard assembly and having a sharpening member that is movable between a sharpening position and a standby position, an actuator operatively connected for enabling a user to move the sharpener member;

the sharpener assembly interacts with the guard assembly such that when the sharpening member is moved from the standby position to the sharpening position, the knife guard member moves from the cutting edge guarding position to the cutting edge sharpening position.

2. The slicer of claim 1 wherein the sharpener assembly is removable from the slicer and the slicer further includes an interlock member that holds the knife guard member in the cutting edge guarding position when the sharpener assembly is removed from the slicer.

3. The slicer of claim 2, wherein the interlock member disengages the knife guard member when the sharpener assembly is mounted on the slicer.

4. The slicer of claim 3, wherein the interlock member is biased to engage the knife guard member.

5. The slicer of claim 4, wherein the interlock member pivots about a pivot axis.

6. The slicer of claim 1, wherein the sharpening member includes a sharpening wheel carried by a shaft.

7. The slicer of claim 1 wherein the sharpener assembly further includes a second sharpening member movable between a sharpening position and a standby position.

8. The slicer of claim 1, wherein the sharpening member is biased toward the standby position.

9. A slicer for use in slicing a food product, the slicer comprising:

a slicer body;

a slicer knife mounted for rotation relative to the slicer body, the slicer knife having a peripheral cutting edge;

a sharpener assembly mounted in an operating position on the slicer body and having a sharpening member movable between a standby position and a sharpening position, the sharpener assembly removable from the slicer body;

a movable knife guard member having a cutting edge guarding position in which the knife guard member is positioned along a portion of the cutting edge proximate a sharpening location at which sharpening occurs, and a cutting edge sharpening position in which the knife guard member is spaced away from the sharpening location to permit the sharpening member to move into the sharpening position;

an interlock for maintaining the knife guard member in the cutting edge guarding position when the sharpener assembly is removed from the slicer body.

10. The slicer of claim 9 wherein the interlock comprises an interlock member having a locking position in which the interlock member engages the knife guard member and holds it in the cutting edge guarding position, the interlock member movable to a non-locking position in which the interlock member does not prevent movement of the knife guard member out of the cutting edge guarding position.

11. The slicer of claim 10 wherein, when the sharpener assembly is removed from the slicer body, the interlock member is biased to stay in the locking position absent application of an external force to the interlock member.

12. The slicer of claim 11 wherein the interlock member is biased into the locking position when the sharpener assembly is mounted in the operating position, when the sharpener assembly is actuated for sharpening, a portion of the sharpener assembly engages the interlock member to move the interlock member to the non-locking position.

13. The slicer of claim 10, wherein the interlock member pivots about a pivot axis.

14. The slicer of claim 13, wherein the knife guard member pivots about a pivot axis that is substantially perpendicular to the pivot axis of the interlock member.

15. The slicer of claim 9 wherein the interlock comprises a powered actuator operatively connected for moving the knife guard member, when the sharpener assembly is removed from the slicer body operation of the powered actuator is disabled.

16. The slicer of claim 15 wherein, when the knife sharpening assembly is mounted in the operating position, operation of the powered actuator moves the knife guard member from the cutting edge guarding position to the cutting edge sharpening position.

17. The slicer of claim 16 wherein a powered actuator is associated with the sharpening member for moving the sharpening member from the standby position to the sharpening position.

18. The slicer of claim 9 wherein the sharpener assembly includes a powered actuator for moving the sharpening member from the standby position to the sharpening position.

19. The slicer of claim 15 wherein the interlock further comprises an interlock member having a locking position in which the interlock member blocks movement of the knife guard member out of the cutting edge guarding position, the interlock member movable to a non-locking position in which the interlock member permits movement of the knife guard member out of the cutting edge guarding position.

20. A method of protecting a peripheral cutting edge of a circular slicer knife of a slicer, and permitting sharpening of the cutting edge by a removable sharpener assembly, the method comprising:

providing a knife guard member that is movable between a cutting edge guarding position and a cutting edge sharpening position;

providing an interlock for preventing movement of the knife guard member from the cutting edge guarding position to the cutting edge sharpening position;

when the removable sharpener assembly is mounted in an operating position on the slicer, the interlock is disabled at least during a sharpening operation of the sharpener assembly;

when the removable sharpener assembly is removed from the slicer, the interlock continues to prevent movement of the knife guard member from the cutting edge guarding position to the cutting edge sharpening position.

21. The method of claim 20 wherein the interlock comprises a powered actuator for moving the knife guard member, when the sharpener assembly is removed from the slicer, operation of the powered actuator is disabled.

22. The method of claim 21 wherein the interlock further comprises a movable interlock member that is biased into a locking position that prevents movement of the knife guard member from the cutting edge guarding position to the cutting edge sharpening position, the interlock member movable to a non-locking position that permits movement of the knife guard member from the cutting edge guarding position to the cutting edge sharpening position.

23. The method of claim 20 wherein the interlock comprises a movable interlock member that is biased into a locking position that prevents movement of the knife guard member from the cutting edge guarding position to the cutting edge sharpening position, the interlock member movable to a non-locking position that permits movement of the knife guard member from the cutting edge guarding position to the cutting edge sharpening position, when the sharpener assembly is mounted in the operating position on the slicer and is actuated for sharpening, a portion of the sharpener assembly engages the interlock member to move the interlock member to the non-locking position.