IP Library Granted Patent US 7,490,469
Granted Patent B2
US 7,490,469 · App. 11/500,117 · Granted Feb 17, 2009

Dual-function stirling engine system

View Patent ↗
Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 7,490,469
App. No.
11/500,117
Granted
Feb 17, 2009
Kind
B2
Abstract

A dual-function system comprising a heat source and a Stirling engine movably secured to a motorized machine, where the Stirling engine is positionable to operate in a refrigeration mode and in a power generation mode. The Stirling engine is configured to transfer heat from an exhaust pipe of the motorized machine in the refrigeration mode, and to transfer heat from the heat source to generate electrical power in the power generation mode.

Claims (27)

1. A dual-function system for use with a motorized machine having an exhaust pipe, the dual-function system comprising:

a heat source; and

a Stirling engine movably secured to the motorized machine, and being positionable to operate in a refrigeration mode in which the Stirling engine is configured to remove heat from at least a portion of the exhaust pipe, the removal of heat causing condensation of water vapor flowing through the exhaust pipe, and being positionable to operate in a power generation mode in which the Stirling engine is configured to receive heat from the heat source to generate electrical power.

2. The dual-function system of claim 1 , further comprising a shaft rotatably secured to the motorized machine, wherein the Stirling engine is secured to the shaft.

3. The dual-function system of claim 2 , further comprising a motorized hub secured to the motorized machine and configured to rotate the shaft.

4. The dual-function system of claim 1 , further comprising a heat exchanger secured to the exhaust pipe and configured to transfer heat from at least a portion of the exhaust pipe to the Stirling engine while the Stirling engine is positioned in the refrigeration mode.

5. The dual-function system of claim 1 , further comprising a battery electrically connected to the Stirling engine.

6. The dual-function system of claim 5 , wherein the Stirling engine is configured to draw electrical power from the battery while positioned in the refrigeration mode.

7. The dual-function system of claim 6 , wherein the Stirling engine is further configured to transmit electrical power to the battery while positioned in the power generation mode.

8. The dual-function system of claim 1 , further comprising an electronic control unit operably connected to the heat source and the Stirling engine.

9. A dual-function system for use with a motorized machine having an exhaust pipe, the dual-function system comprising:

a heat source;

a heat exchanger secured to the exhaust pipe; and

a Stirling engine movably secured to the motorized machine and having a conductive head, wherein the conductive head engages the heat exchanger while the Stirling engine is positioned to operate in a refrigeration mode to remove heat from at least a portion of the exhaust pipe, the removal of heat causing condensation of water vapor flowing through the exhaust pipe, and wherein the conductive head engages the heat source while the Stirling engine is positioned to operate in a power generation mode for transferring heat from the heat source to the Stirling engine, causing the Stirling engine to generate electrical power.

10. The dual-function system of claim 9 , further comprising a shaft rotatably secured to the motorized machine, wherein the Stirling engine is secured to the shaft.

11. The dual-function system of claim 10 , further comprising a motorized hub secured to the motorized machine and configured to rotate the shaft.

12. The dual-function system of claim 9 , further comprising a battery electrically connected to the Stirling engine.

13. The dual-function system of claim 12 , wherein the Stirling engine is configured to draw electrical power from the battery while operating in the refrigeration mode.

14. The dual-function system of claim 13 , wherein the Stirling engine is further configured to transmit electrical power to the battery while operating in the power generation mode.

15. A dual-function system for use with a motorized machine having an exhaust pipe, the dual-function system comprising:

a heat source;

a shaft rotatably secured to the motorized machine;

a Stirling engine secured to the shaft and rotatably positionable between a refrigeration mode and a power generation mode, the Stirling engine being configured to condense water vapor flowing through the exhaust pipe while positioned to operate in the refrigeration mode and to engage with the heat source to generate electrical power while positioned to operate in the power generation mode.

16. The dual-function system of claim 15 , further comprising a heat exchanger secured to the exhaust pipe and configured to transfer heat from the exhaust pipe while the Stirling engine is positioned to operate in the refrigeration mode.

17. The dual-function system of claim 15 , further comprising a battery electrically connected to the Stirling engine.

18. The dual-function system of claim 17 , wherein the Stirling engine is configured to transfer the generated electrical power to the battery while positioned to operate in the power generation mode.

19. The dual-function system of claim 15 , further comprising an electronic control unit operably connected at least to the shaft.

Assignments (10)
TERMINATION AND RELEASE OF SECURITY INTEREST IN PATENTS Recorded Jul 28, 2023
From: BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT (AS SUCCESSOR AGENT TO WELLS FARGO BANK, NATIONAL ASSOCIATION (AS SUCCESSOR-IN-INTEREST TO WACHOVIA BANK, N.A.), AS ADMINISTRATIVE AGENT
To: AEROJET ROCKETDYNE, INC. (AS SUCCESSOR-BY-MERGER TO AEROJET-GENERAL CORPORATION)
Reel/Frame 064424/0087 →
RELEASE OF SECURITY INTEREST Recorded Aug 5, 2016
From: U.S. BANK NATIONAL ASSOCIATION
To: AEROJET ROCKETDYNE, INC. (F/K/A AEROJET-GENERAL CORPORATION)
Reel/Frame 039594/0887 →
RELEASE OF SECURITY INTEREST Recorded Aug 5, 2016
From: U.S. BANK NATIONAL ASSOCIATION
To: AEROJET ROCKETDYNE OF DE, INC. (F/K/A PRATT & WHITNEY ROCKETDYNE, INC.)
Reel/Frame 039597/0890 →
NOTICE OF SUCCESSION OF AGENCY (INTELLECTUAL PROPERTY) Recorded Jun 20, 2016
From: WELLS FARGO BANK, NATIONAL ASSOCIATION, AS THE RESIGNING AGENT
To: BANK OF AMERICA, N.A., AS THE SUCCESSOR AGENT
Reel/Frame 039079/0857 →
MERGER/CHANGE OF NAME Recorded Jul 8, 2013
From: RPW ACQUISITION LLC
To: AEROJET ROCKETDYNE, INC.
Reel/Frame 030754/0248 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 8, 2013
From: UNITED TECHNOLOGIES CORPORATION
To: RPW ACQUISITION LLC
Reel/Frame 030750/0283 →
SECURITY AGREEMENT Recorded Jun 21, 2013
From: PRATT & WHITNEY ROCKETDYNE, INC.
To: U.S. BANK NATIONAL ASSOCIATION
Reel/Frame 030656/0615 →
SECURITY AGREEMENT Recorded Jun 21, 2013
From: AEROJET-GENERAL CORPORATION
To: U.S. BANK NATIONAL ASSOCIATION
Reel/Frame 030656/0667 →
SECURITY AGREEMENT Recorded Jun 17, 2013
From: AEROJET-GENERAL CORPORATION
To: WELLS FARGO BANK, NATIONAL ASSOCIATION
Reel/Frame 030628/0319 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Aug 7, 2006
From: CARROLL, JOSEPH P.
To: UNITED TECHNOLOGIES CORPORATION
Reel/Frame 018140/0973 →