# US 10,307,036 B2 · Warewash machine with removable rotating arm and related method

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- Number: US 10,307,036 B2
- Document ID: US10307036B2
- Status: Granted
- Kind: B2
- Application number: 15/682,127
- Filed: 2017-08-21
- Published: 2017-11-30
- Granted: 2019-06-04
- Earliest claimed: 2012-02-14
- Assignees: Premark FEG L.L.C.
- Applicants: Premark Feg L.L.C.
- Inventors: Michael T. Watson; Brian A. Brunswick; Jeffrey R. Newcomer; Gonska Heinrich; Roland Walz
- Web page: https://patentgrep.com/patent/US10307036B2

## CPC

- A47L 15/428: {Rotary nozzles}
- A47L 15/23: moved by means of the sprays
- A47L 15/0078: {with a plurality of fluid recirculation arrangements, e.g. with separated washing liquid and rinsing liquid recirculation circuits}
- A47L: DOMESTIC WASHING OR CLEANING (brushes A46B; cleaning quantities of bottles or of other hollow articles of one kind B08B9/00; laundry D06F); SUCTION CLEANERS IN GENERAL (cleaning in general B08)

## Abstract

A warewash machine arm mechanism includes a liquid supply shaft assembly including a rotatable sleeve bearing mounted thereon, and an arm assembly including an elongated interior liquid flow space along an arm body and one or more liquid ejection orifices. The arm assembly is releasably mounted to the supply shaft assembly via a latch mechanism of the arm assembly that engages the rotatable sleeve bearing such that the arm assembly rotates with the rotatable sleeve bearing during ejection of liquid from the liquid ejection orifices.

## Claims

### Claim 1

A warewash machine arm for ejecting liquid in a warewash machine, the arm comprising:
an arm body formed to provide an elongated interior liquid flow space along an arm axis, the arm body including one or more liquid ejection orifices;
a mount hub connected to the arm body, the mount hub including a mount opening and a releasable latch mechanism that includes a first slidable actuator mounted for linear sliding movement relative to the mount opening and a second slidable actuator mounted for linear sliding movement relative to the mount opening, each of the first slidable actuator and the second slidable actuator having an interior end portion biased toward an axis of the mount opening and an exterior end portion biased away from the axis of the mount opening, such that movement of the exterior end portion toward the axis of the mount opening slides the interior end portion away from the axis of the mount opening, enabling latch mechanism release via a squeezing operation of the exterior end portion of the first slidable actuator toward the exterior end portion of the second slidable actuator.

### Claim 2 (depends on 1)

The warewash machine arm of claim 1 wherein a compression spring is compressed between a portion of the first slidable actuator and a portion of the second slidable actuator.

### Claim 3 (depends on 2)

The warewash machine arm of claim 2 wherein the exterior end portion of the first slidable actuator is diametrically opposed to the exterior end portion of the second slidable actuator.

### Claim 4 (depends on 1)

A warewash machine including the warewash machine arm of claim 1, the machine further comprising a supply shaft assembly including a rotatable sleeve bearing, the arm mounted to the rotatable sleeve bearing via the first and second slidable actuators engaging the rotatable sleeve bearing.

### Claim 5 (depends on 4)

The warewash machine of claim 4 wherein the rotatable sleeve bearing is mounted about a hollow axle shaft having an end portion configured to prevent axial removal of the rotatable sleeve bearing.

### Claim 6 (depends on 5)

The warewash machine of claim 5 wherein the supply shaft assembly extends downward from an upper portion of the warewash machine, the arm is a rinse arm, and a wash arm assembly is also mounted on the supply shaft assembly, the wash arm assembly supported on the supply shaft assembly by the rinse arm.

### Claim 7 (depends on 6)

The warewash machine of claim 6 wherein the wash arm assembly includes a bushing having a lower portion extending downward from an arm body of the wash arm assembly, the bushing including a downwardly facing bearing surface that sits atop an upper portion of the arm mount hub.

### Claim 8 (depends on 1)

The warewash machine arm of claim 1 wherein the exterior end portion of the first slidable actuator and the interior end portion of the second slidable actuator are located on a first side of the mount opening, and the exterior end portion of the second slidable actuator and the interior end portion of the first slidable actuator are located on a second side of the mount opening, the second side being opposite the first side.

### Claim 9

A warewash machine arm for ejecting liquid, comprising:
an elongated arm body including an elongated interior liquid flow space along the elongated arm body and one or more liquid ejection orifices;
an arm mount hub connected with the arm body and having a mount opening and a releasable latch mechanism that includes first and second slidable actuators, each actuator having an interior end portion biased toward an axis of the mount opening and an exterior end portion biased away from the axis, such that sliding the exterior end portion toward the axis slides the interior end portion away from the axis, enabling latch mechanism release via a squeezing operation of the exterior end portions each other with one hand.