Patent ID: 11912545
Assignee: MILWAUKEE ELECTRIC TOOL CORPORATION
Field: Handling (Mechanical engineering)
Classification: CPC B | IPC B

Claim 6:
7. A wireless hoist system comprising:
a first hoist device having a first motor and a first wireless transceiver;
a second hoist device having a second motor and a second wireless transceiver, wherein the second wireless transceiver is in wireless communication with the first wireless transceiver, and the first hoist device and the second hoist device are configured to be coupled to a workpiece to raise or lower the workpiece, wherein the first hoist device is coupled to the workpiece by a first chain and the second hoist device is coupled to the workpiece by a second chain;
a controller in wireless communication with the first wireless transceiver of the first hoist device, wherein the controller is configured to:
receive user input and determine a first operation parameter based on the user input,
provide, wirelessly, a first control signal to the first hoist device,
provide, wirelessly, a second control signal to the second hoist device, wherein the second control signal is based on the first control signal,

wherein, the first hoist device operates based on the first control signal and the second hoist device operates based on the second control signal, and
wherein the first hoist device further includes:
a sensor for detecting a chain length of the first chain indicative of a length of chain released from the first hoist device; and
a motor drive coupled to the sensor and the first motor and configured to:
receive the detected chain length from the sensor,
receive the first control signal from the controller, and
drive the first motor based on the first control signal and the chain length.