Power bowl lift, motor mount and tensioner for mixing machine

• US 6,883,959 B2
• Filed: 12/23/2002
• Issued: 04/26/2005
• Est. Priority Date: 12/23/2002
• Status: Active Grant

• Current Assignee: Premark FEG LLC (Illinois Tool Works Inc.)
• Original Assignee: Premark FEG LLC (Illinois Tool Works Inc.)
• Inventors: Brunswick, Brian A., Donthnier, Thomas S., Bader, Brian E., Schnipke, Janice J., Valentine, Richard Dwight
• Primary Examiner(s): Cooley, Charles E.
• Application Number:
  US10/329,257
• Publication Number:
  US 20040120216A1
• Time in Patent Office: 855 Days
• Field of Search: 366 96- 98, 366/197, 366/203, 366206-207, 366/288, 474/122, 474/130
• US Class Current: 366/203
• CPC Class Codes: A47J 2043/04463 with a mixing unit rigidly fixed on the housing and a movable support for the bowl
• CPC Class Codes: B01F 27/806 with vertical displacement of the stirrer, e.g. in combination with means for pivoting the stirrer about a vertical axis in order to co-operate with different receptacles

Abstract

A mixing machine includes a power bowl lift mechanism that operates independent of a drive motor for mixing operations, and may be formed by a linear actuator. A pivoting motor mount assembly can be used in conjunction with a portable tensioning tool for tensioning a drive belt.

Claims

1. A mixing machine, comprising:

a mixer body;

a head extending outward from the mixer body and over a bowl receiving area, the head including a rotatable output member for receiving a mixer tool;

a drive assembly for effecting rotation of the rotatable output member and including a drive motor with output shaft, an input shaft operatively associated with the rotatable output member, and a belt arrangement operatively connecting the motor output shaft to the input shaft;

a mount bracket, the drive motor connected to the mount bracket;

a fixed support, the mount bracket pivotally connected to the fixed support to permit pivoting of the mount bracket and drive motor about a pivot axis;

a securing mechanism for preventing pivoting of the mount bracket and drive motor about the pivot axis, the securing mechanism having a released state to allow pivoting of the mount bracket and drive motor; and

at least one vibration isolator positioned between the drive motor and the mount bracket for reducing vibrations transmitted therebetween during motor operation.

2. The mixing machine of claim 1 wherein the motor is connected to the mount bracket at a plurality of locations having a corresponding plurality of vibration isolators.

3. The mixing machine of claim 1 wherein the drive motor moves between a non-tensioning position and a tensioning position when the mount bracket pivots, an axis of the output shaft when the drive motor in the non-tensioning position being non-parallel to the axis of the output shaft when the drive motor is in the tensioning position.

4. The mixing machine of claim 3 wherein the axis of the output shaft is substantially vertical when the motor is in the tensioning position.

5. The mixing machine of claim 1 wherein the fixed support comprises a metal casting within the head, the fixed support including a tension indicator on a portion thereof.

6. A portable tensioning tool engaged with the mixing machine of claim 1 while the securing mechanism is in the released state, the tensioning tool comprising:

a rod having a protrusion extending away from an axis of the rod, the protrusion located toward a first end of the rod, the rod being threaded along a portion located toward a second end thereof;

a guide extending about the rod and movable therealong, the guide including a protrusion extending therefrom away from the axis of the rod, the guide including a stop surface at one end thereof;

spring means positioned about the rod and located for contacting the stop surface;

a limiter disposed about the rod and including a first end and a second end, the first end configured to overlap with the spring means, the first end facing the stop surface and including a portion for contacting the stop surface when the limiter in moved toward the stop surface and the spring means is compressed;

a nut positioned along the threaded portion of the rod and for moving the limiter toward the guide stop surface.

7. The portable tensioning tool of claim 6 wherein the spring means comprises one or more spring washers or one or more coil springs or spacer/wave spring combinations.

8. The portable tensioning tool of claim 6 wherein the rod protrusion includes a slot therein.

9. The portable tensioning tool of claim 6 wherein the nut and limiter are unitary with each other.

10. The mixing machine of claim 1 wherein:

the fixed support comprises a metal casting within the head;

the mixer body includes a bowl receiving portion below the head, the bowl receiving portion mounted for movement between a lowered position away from the head and a raised position toward the head; and

a linear actuator connected for powered movement of the bowl receiving portion back and forth between the lowered position and the raised position, an upper portion of the linear actuator is connected with the metal casting.