US4485781A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine protection device
Assignee: Individual
•
Filing: 1983-05-16
•
Granted: 1984-12-04
•
Expires: 2003-05-16
Abstract
Abstract An engine protection device to automatically reduce engine speed to low idle or complete stop. Engine speed reduction is accomplished through the instrumentalies associated with the engine throttle rod. The effective length of the engine rod varies in response to an increase in the coolant temperature or a decrease engine oil pressure.
Inventors
- 👤 Richard W. Barnes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:37
CPC Classifications
F; F02; F02D; F02D17/00; F02D17/04
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
246 words
An engine protection device for controlling engine speed of internal combustion engine comprising: a throttle actuator means connectable to an engine speed regulator of the engine; a pressure change responsive means connected between said throttle actuator means and the engine speed regulator; a sensing means connectable to the engine, said sensing means for sensing the increase in engine temperature; and a fluid connecting means connected to said pressure change responsive means and to said sensing means, said fluid connecting means for converting temperature increases from said sensing means to physical regulation through said pressure change responsive means; said pressure change responsive means for varying said engine speed regulator means to idle or shut down the engine by sensing increases in engine temperature such that an undesirable increase in engine temperature varies said pressure change responsive means to effect the engine speed; said throttle actuator means includes a throttle control and said engine speed regulator; and said pressure change responsive means includes a variable fluid link means connected between said throttle control and said engine speed regulator; said undesirable increase in engine temperature varies the pressure change responsive means to reduce the engine speed; said variable link means includes an elongated hydraulic cylinder and a solid cylinder that fits snuggly into said elongated hydraulic cylinder; said solid cylinder moving in response to an increase in engine temperature; said elongated hydraulic cylinder includes a conduit for communication between said pressure change responsive means and said elongated hydraulic cylinder.
Claim 2
Dependent Claim
246 words
An engine protection device for controlling engine speed of internal combustion engine comprising: a throttle actuator means connectable to an engine speed regulator of the engine; a pressure change responsive means connected between said throttle actuator means and the engine speed regulator; a sensing means connectable to the engine, said sensing means for sensing the increase in engine temperature; and a fluid connecting means connected to said pressure change responsive means and to said sensing means, said fluid connecting means for converting temperature increases from said sensing means to physical regulation through said pressure change responsive means; said pressure change responsive means for varying said engine speed regulator means to idle or shut down the engine by sensing increases in engine temperature such that an undesirable increase in engine temperature varies said pressure change responsive means to effect the engine speed; said throttle actuator means includes a throttle control and said engine speed regulator; and said pressure change responsive means includes a variable fluid link means connected between said throttle control and said engine speed regulator; said undesirable increase in engine temperature varies the pressure change responsive means to reduce the engine speed; said variable link means includes an elongated hydraulic cylinder and a solid cylinder that fits snuggly into said elongated hydraulic cylinder; said solid cylinder moving in response to an increase in engine temperature; said elongated hydraulic cylinder includes a conduit for communication between said pressure change responsive means and said elongated hydraulic cylinder.
Claim 3
Dependent Claim
198 words
An engine protection device for controlling engine speed of internal combustion engine comprising: a throttle actuator means connected to the engine to control speed of the engine; a pressure change responsive means connected between said throttle actuator means and the engine; a sensing means connected to the engine; and a fluid connecting means connected to said pressure change responsive means and to said sensing means; said pressure change responsive means for sensing increases in engine temperature such that an undesirable increase in engine temperature varies pressure change responsive means to reduce the engine speed; said throttle actuator means includes a throttle control and an engine fuel regulator; and said pressure change responsive means includes a variable fluid link means connected between said throttle control and said fuel regulator; said undesirable increase in engine temperature shortens the pressure change responsive means to reduce the engine speed; said variable link means includes an elongated hydraulic cylinder and a solid cylinder that fits snuggly into said elongated hydraulic cylinder; said solid cylinder moving in response to an increase in engine temperature; said elongated hydraulic cylinder includes a conduit for communication between said pressure change responsive means and said elongated hydraulic cylinder.
Claim 4
Dependent Claim
198 words
An engine protection device for controlling engine speed of internal combustion engine comprising: a throttle actuator means connected to the engine to control speed of the engine; a pressure change responsive means connected between said throttle actuator means and the engine; a sensing means connected to the engine; and a fluid connecting means connected to said pressure change responsive means and to said sensing means; said pressure change responsive means for sensing increases in engine temperature such that an undesirable increase in engine temperature varies pressure change responsive means to reduce the engine speed; said throttle actuator means includes a throttle control and an engine fuel regulator; and said pressure change responsive means includes a variable fluid link means connected between said throttle control and said fuel regulator; said undesirable increase in engine temperature shortens the pressure change responsive means to reduce the engine speed; said variable link means includes an elongated hydraulic cylinder and a solid cylinder that fits snuggly into said elongated hydraulic cylinder; said solid cylinder moving in response to an increase in engine temperature; said elongated hydraulic cylinder includes a conduit for communication between said pressure change responsive means and said elongated hydraulic cylinder.
Claim 5
Dependent Claim
37 words
An engine protection device for controlling engine speed of internal combustion engine as set forth in claim 2, wherein: said elongated hydraulic cylinder includes a second conduit for communication between the engine and said elongated hydraulic cylinder.
Claim 6
Dependent Claim
55 words
An engine protection device for controlling engine speed of internal combustion engine as set forth in claim 3 wherein: said conduit allowing for the flow of oil between said elongated hydraulic cylinder, said pressure responsive means and said engine; said second conduit allowing for passage of oil between said elongated hydraulic cylinder and said engine.
Claim 7
Dependent Claim
40 words
An engine protection device for controlling engine speed of internal combustion engine as set forth in claim 2, wherein: said conduit allowing for the flow of compressed air between said elongated hydraulic cylinder; said pressure responsive means and said engine.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-12-04 | 1988-06-04 | 1988-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-04 | 1992-06-04 | 1992-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-04 | 1996-06-04 | 1996-12-04 | $7700.00 | Window Closed / Lapsed |