IP Library Granted Patent US 12,431,764
Granted Patent B2
US 12,431,764 · App. 18/342,490 · Granted Sep 30, 2025

Power takeoff-driven refrigeration

Inventor: Rustee Stubbs (Williston, ND)
Assignee: Lovis, LLC
H02K7/1815B60H1/00014B60H1/00428H02J7/14H02J7/35H02K9/19H02K11/0094H02K11/04H02K11/33H02S10/20H02S10/40Y02T10/88
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Quick Facts
Patent No.
US 12,431,764
App. No.
18/342,490
Granted
Sep 30, 2025
Kind
B2
Abstract

A system for PTO-driven refrigeration includes a generator that is configured to be mechanically connected to a power takeoff (PTO) and a converter that is configured to receive AC power from the generator and is operable to convert the AC power to DC power. The generator is connected to a charge controller that is connected to an energy storage element. The energy storage element is connected to a controller configured to receive DC power and provide AC power to a motor. The motor may be mechanically connectable to a refrigeration system. The energy storage element is further configured to receive power from a second charge controller that receives power via an AC power input or solar system. In some examples, the energy storage element provides power to auxiliary systems within a cab of a semi-truck.

Claims (34)

1. A system for power takeoff-driven refrigeration, comprising:

a generator configured to mechanically couple to a power takeoff (PTO);

a converter configured to receive Alternating Current (AC) power from the generator, the converter being operable to convert the AC power to Direct Current (DC) power, the converter configured to send a first portion of the DC power to a DC regulator and a second portion of the DC power to a computing system that has one or more processors and one or more computer-readable hardware storage media;

the DC regulator configured to receive the DC power from the converter and configured to charge a battery bank;

a solar panel coupled to the semi-truck and configured to charge the battery bank;

an AC charge controller configured to receive AC power, wherein the AC charge controller is configured to charge the battery bank;

an inverter coupled to the battery bank configured to invert DC power to AC power, the inverter configured to provide AC power to a motor;

the motor mechanically coupled to a compressor of a refrigeration system of a semi-trailer; and

a first cooling system in fluid communication with the generator, and a second cooling system in fluid communication with the motor;

wherein the computing system is configured to communicate with one or more sensors associated with the generator, the motor, or the refrigeration system; and

wherein the computer-readable hardware storage media comprises computer-executable instructions being executable by the one or more processors to cause the computing system to selectively activate or deactivate the motor or the generator in response to a triggering event.

2. A system for power takeoff-driven refrigeration, comprising:

a generator configured to mechanically couple to a power takeoff (PTO), wherein a drive shaft of the PTO is in constant mechanical communication with a PTO driver gear of a transmission of a semi-truck when the PTO is mounted to the transmission of the semi-truck;

a converter configured to receive Alternating Current (AC) power from the generator, the converter being operable to convert the AC power to Direct Current (DC) power, the converter configured to send a first portion of the DC power to a DC regulator and a second portion of the DC power to a computing system that has one or more processors and one or more computer-readable hardware storage media;

the DC regulator configured to receive the DC power from the converter and configured to charge a battery bank;

an AC charge controller configured to receive AC power, wherein the AC charge controller is configured to charge the battery bank; and

an inverter coupled to the battery bank configured to invert DC power to AC power, the inverter configured to provide AC power to auxiliary systems of the semi-truck when a state of charge of the battery bank exceeds a predetermined threshold value.

3. The system of claim 2 wherein the inverter coupled to the power bank provides power to the generator, thereby generating rotational force to the PTO to increase fuel efficiency.

4. The system of claim 2 , wherein the auxiliary systems comprise climate control.

5. A method for operating a power takeoff-driven (PTO) refrigeration system, comprising:

a. using a computing system to monitor:

i. a state of charge of a battery bank,

ii. a temperature of a semi-trailer,

iii. an operational status of an engine of a diesel-truck,

iv. a voltage of one or more solar panels, and

v. energy consumption levels;

b. generating AC power with a generator that is mechanically connected to the PTO;

c. providing AC power to a converter that converts at least a portion of the AC power to DC power;

d. providing at least a portion of the DC power to a controller configured to invert at least a portion of the DC power to AC power;

e. providing, via the controller, AC power to a motor that is mechanically connected to a refrigeration system;

f. driving the refrigeration system with the motor; and

g. when the power stored in the battery bank is above a predetermined threshold and the temperature of the semi-trailer is below a predetermined threshold, providing power to one or more of:

i. auxiliary systems, and

ii. the generator for generating rotational force to aid the PTO.

Assignments (1)
NUNC PRO TUNC ASSIGNMENT Recorded Jun 17, 2025
From: STUBBS, RUSTEE
To: LOVIS, LLC
Reel/Frame 071434/0178 →
Continuity (4)
Continuation In Part 17129421 · Dec 21, 2020
Continuation In Part 17086692 · Nov 2, 2020
Provisional Application 62951505 · Dec 20, 2019
Related Publication 20230344308A1 · Oct 26, 2023
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