Patent US4381744A successfully refreshed from Google Patents.
US4381744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid temperature monitor
Assignee: Individual
•
Filing: 1980-12-08
•
Granted: 1983-05-03
•
Expires: 2000-12-08
Abstract
Abstract A fluid temperature monitor coupled into the engine coolant fluid circuit of an internal combustion engine includes a thermostat which is responsive to overheating of the fluid to operate a plunger so as to actuate a first switch upon overheating of the fluid to sound a warning alarm and a second switch to turn off the engine.
Inventors
- 👤 D. A. Terry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:57
CPC Classifications
F; F01; F01P; F01P11/00; F01P11/14; F01P11/16
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
114 words
A fluid temperature monitor for monitoring the temperature of a fluid comprising: thermostat means operable in response to the temperature of the fluid, warning means, first switch means having first contacts which are actuated by said thermostat means to close and complete an electrical circuit to actuate said warning means when the temperature of said fluid reaches a predetermined level, prime mover cutoff means, second switch means having second contacts which are actuated by said thermostat means to close and complete an electrical circuit to actuate said prime mover cutoff means after said warning means has been actuated, and means for bathing said thermostat means and said contacts directly in said fluid being monitored.
Claim 2
Dependent Claim
114 words
A fluid temperature monitor for monitoring the temperature of a fluid comprising: thermostat means operable in response to the temperature of the fluid, warning means, first switch means having first contacts which are actuated by said thermostat means to close and complete an electrical circuit to actuate said warning means when the temperature of said fluid reaches a predetermined level, prime mover cutoff means, second switch means having second contacts which are actuated by said thermostat means to close and complete an electrical circuit to actuate said prime mover cutoff means after said warning means has been actuated, and means for bathing said thermostat means and said contacts directly in said fluid being monitored.
Claim 3
Dependent Claim
33 words
The monitor of claim 1 wherein the fluid is the coolant fluid of an internal combustion engine and said monitor includes coupling means for coupling said monitor into the engine coolant fluid circuit.
Claim 4
Dependent Claim
26 words
The monitor of claim 1 wherein the prime mover cutoff means interrupts the ignition circuit of an internal combustion engine when said cutoff means is actuated.
Claim 5
Dependent Claim
41 words
The monitor of claim 1 wherein said first and second switch means comprise a movable plunger, said plunger actuating said warning means when contacted by said thermostat means and actuating said prime mover cutoff means when moved by said thermostat means.
Claim 6
Dependent Claim
40 words
The monitor of claim 1, wherein said means for bathing said thermostat means and contact means includes housing means enclosing said thermostat means and contact means, said fluid filling said housing means and surrounding said thermostat means and contact means.
Claim 7
Dependent Claim
102 words
The monitor of claim 1 wherein said fluid is a fluid associated with an internal combustion engine and said prime mover cutoff means interrupts the operation of the engine when it is actuated, said first and second switch means comprise a movable plunger, said plunger actuating said warning means when contacted by said thermostat means and actuating said prime mover cutoff means when moved by said thermostat means, said means for bathing said thermostat means and contact means includes housing means enclosing said thermostat means and contact means, said fluid filling said housing means and surrounding said thermostat means and contact means.
Claim 8
Dependent Claim
31 words
The monitor of claim 6 wherein the fluid is the coolant fluid of the engine and said monitor includes coupling means for coupling said monitor into the engine coolant fluid circuit.
Claim 9
Dependent Claim
105 words
A fluid temperature monitor for monitoring the temperature of a fluid comprising; thermostat means operable in response to the temperature of the fluid; warning means; prime mover cutoff means; switch means having contacts which are actuated by said thermostat means to actuate said warning means when the temperature of said fluid reaches a predetermined level; delay means for actuating said prime mover cutoff means after said warning means is actuated; and housing means containing said thermostat means and said contacts, said housing means receiving said fluid to be monitored, said thermostat means and said contacts being bathed directly in said fluid in said housing means.
Claim 10
Dependent Claim
105 words
A fluid temperature monitor for monitoring the temperature of a fluid comprising; thermostat means operable in response to the temperature of the fluid; warning means; prime mover cutoff means; switch means having contacts which are actuated by said thermostat means to actuate said warning means when the temperature of said fluid reaches a predetermined level; delay means for actuating said prime mover cutoff means after said warning means is actuated; and housing means containing said thermostat means and said contacts, said housing means receiving said fluid to be monitored, said thermostat means and said contacts being bathed directly in said fluid in said housing means.
Claim 11
Dependent Claim
31 words
The monitor of claim 8, wherein the fluid is the coolant fluid of an engine and said monitor includes coupling means for coupling said monitor into the engine coolant fluid circuit.
Claim 12
Dependent Claim
32 words
The monitor of claim 8, wherein said thermostat means contacts said switch means to actuate said warning means and moves said switch means after contact to actuate said prime mover cutoff means.
References Cited (Backward Citations)
US2389103A
Cited
US2930365A
Cited
US1478084A
Cited
US1478090A
Cited
US2450739A
Cited
US2618248A
Cited
US3893108A
Cited
US4019489A
Cited
US4147151A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-05-02 | 1986-11-01 | 1987-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-02 | 1990-11-01 | 1991-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-02 | 1994-11-01 | 1995-05-03 | $7700.00 | Window Closed / Lapsed |