# US 12,214,527 B2 · Saw cart

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- Number: US 12,214,527 B2
- Document ID: US12214527B2
- Status: Granted
- Kind: B2
- Application number: 18/063,180
- Filed: 2022-12-08
- Published: 2023-04-06
- Granted: 2025-02-04
- Earliest claimed: 2018-07-17
- Assignees: Milwaukee Electric Tool Corporation
- Applicants: Milwaukee Electric Tool Corporation
- Inventors: Terry L. Timmons; Dane Laitinen; Mitchell Carlson; Bradley S. Helm; Paul W. Eiche
- Web page: https://patentgrep.com/patent/US12214527B2

## CPC

- B28D 7/00: Accessories specially adapted for use with machines or devices of the preceding groups {(B28D5/0058 takes precedence)}
- B28D 1/045: {Sawing grooves in walls; sawing stones from rocks; sawing machines movable on the stones to be cut}
- B62B 3/02: involving parts being adjustable, collapsible, attachable, detachable or convertible
- B62B 3/10: characterised by supports specially adapted to objects of definite shape
- B62B 3/12: characterised by three-wheeled construction
- B62B 5/064: {adaptable for different users, e.g. by means of pivoting elements}
- B62B 2202/48: Tools
- B28D: WORKING STONE OR STONE-LIKE MATERIALS
- B62B: HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES (characterised by animal propulsion B62C; propulsion of sledges by driver or engine B62M)

## Abstract

A cart for carrying a cut-off saw having a saw blade. The cart includes a frame with upper and lower portions, a wheel arm pivotably coupled to the lower portion about a first axis, and a rear wheel assembly coaxial with the first axis and coupled to the frame and the wheel arm. The cart includes a front wheel coupled to an end of the wheel arm opposite the rear wheel assembly, an adjustment lever pivotably coupled to the upper portion about a second axis, and a link having a first end pivotably coupled to the adjustment lever and spaced from the second axis, and a second end pivotably coupled to the wheel arm between the first axis and the front wheel. Pivoting the adjustment lever about the second axis pivots the wheel arm about the first axis to adjust a vertical position of the front wheel relative to the upper portion.

## Claims

### Claim 1

A cart for carrying a cut-off saw having a saw blade, the cart comprising:
a frame including an upper portion and a lower portion;
a wheel arm pivotably coupled to the lower portion of the frame about a first axis;
a rear wheel assembly coaxial with the first axis and coupled to the frame and the wheel arm;
a front wheel coupled to an end of the wheel arm opposite the rear wheel assembly;
an adjustment lever pivotably coupled to the upper portion of the frame about a second axis; and
a link having a first end pivotably coupled to the adjustment lever at a location spaced from the second axis, and a second end pivotably coupled to the wheel arm at a location between the first axis and the front wheel;
wherein pivoting the adjustment lever about the second axis pivots the wheel arm about the first axis to adjust a vertical position of the front wheel relative to the upper portion of the frame, and therefore a vertical position of the saw blade relative to a support surface of the cart.

### Claim 2 (depends on 1)

The cart of claim 1, wherein the front wheel moves relative to the upper portion of the frame along an arc having an origin intersected by the first axis.

### Claim 3 (depends on 1)

The cart of claim 1, wherein the first axis is parallel with the second axis.

### Claim 4 (depends on 1)

The cart of claim 1, wherein the adjustment lever includes a bracket, wherein the first end of the link is pivotably coupled to a lower end of the bracket.

### Claim 5 (depends on 4)

The cart of claim 4, wherein the adjustment lever includes a handle in which the bracket is at least partially received, and wherein the second axis is located between the handle and the lower end of the bracket.

### Claim 6 (depends on 5)

The cart of claim 5, further comprising a gear coupled to the upper portion of the frame adjacent the bracket, the gear including a plurality of gear teeth, wherein the adjustment lever further comprises an actuator having an upper end that protrudes from an internal opening in the handle and an opposite, lower end that is engageable with the gear teeth to maintain the adjustment lever in one of a plurality of orientations relative to the gear that coincide with different positions of the wheel arm relative to the frame.

### Claim 7 (depends on 5)

The cart of claim 5, further comprising:
a handle configured to be grasped by a user pushing the cart; and
a joint for securing the handle in a desired rotational position relative to the frame,
wherein the joint is coaxial with the second axis.

### Claim 8 (depends on 1)

The cart of claim 1, wherein pivoting the adjustment lever toward the front wheel pivots the wheel arm towards the upper portion of the frame, thereby lowering the position of the saw blade relative to the support surface, and wherein pivoting the adjustment lever away from the wheel arm pivots the front wheel away from the upper portion of the frame, thereby raising the position of the saw blade relative to the support surface.

### Claim 9 (depends on 1)

The cart of claim 1, wherein the wheel arm is pivotable between a first extreme position in which the saw blade is at a maximum vertical position relative to the support surface and a second extreme position in which the saw blade is at a minimum vertical position relative to the support surface.

### Claim 10 (depends on 9)

The cart of claim 9, wherein a vertical distance between the front wheel at the first extreme position of the wheel arm and the front wheel at the second extreme position of the wheel arm is greater than a maximum plunge depth of the saw blade.

### Claim 11

A cart for carrying a cut-off saw having a saw blade, a motor drivably coupled to the saw blade, and a trigger for varying the rotational speed of the motor and saw blade, the cart comprising:
a frame;
a handle coupled to the frame;
a throttle lever pivotably coupled to the handle;
a throttle cable having a first end and a second end opposite the first end, the first end proximate the trigger to selectively pull the trigger, thereby varying the rotational speed of the motor and saw blade; and
an actuator supported by the handle and movable between a first position, in which pivoting movement of the throttle lever is incapable of tensioning the throttle cable for pulling the trigger, and a second position, in which pivoting movement of the throttle lever tensions the throttle cable for pulling the trigger.

### Claim 12 (depends on 11)

The cart of claim 11, wherein the throttle cable extends through a portion of the handle and/or the frame.

### Claim 13 (depends on 11)

The cart of claim 11, wherein the actuator is a push button.

### Claim 14 (depends on 11)

The cart of claim 11, further comprising a resilient member biasing the actuator toward the first position.

### Claim 15 (depends on 11)

The cart of claim 11, further comprising an interlock system including the actuator, a first bracket coupled to the throttle lever for co-rotation therewith, and a second bracket that is coupled to the second end of the throttle cable.

### Claim 16 (depends on 15)

The cart of claim 15, wherein moving the actuator from the first position to the second position rotationally unitizes the first and second brackets such that pivoting movement of the throttle lever tensions the throttle cable for pulling the trigger.

### Claim 17 (depends on 11)

The cart of claim 11, further comprising an actuator arm coupled to the first end of the throttle cable, wherein the actuator arm is configured to depresses the trigger in response to the throttle lever tensioning the throttle cable.

### Claim 18 (depends on 17)

The cart of claim 17, further comprising a mount, coupled to the frame, within which a rear handle of the cut-off saw is receivable, wherein the actuator arm is pivotably coupled to the mount.

### Claim 19 (depends on 18)

The cart of claim 18, wherein the mount includes
a housing coupled to the frame,
a cover removably coupled to the housing and defining a cavity with the housing within which the rear handle of the cut-off saw is receivable, and
a latch for securing the cover in a closed position.