US3658387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermally activated power brake system and pump therefor
Assignee: Individual
•
Filing: 1970-12-09
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Granted: 1972-04-25
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Expires: 1990-12-09
Abstract
Abstract A power brake system for vehicles wherein thermal energy from the exhaust of the engine of a vehicle is converted into mechanical energy which is used to apply the brakes of the vehicle. In the system, working fluid in the liquid phase is changed to high energy vapor by exhaust heat from the engine. The high evergy vapor is expanded in brake motors to produce mechanical braking energy. The system includes a feed pump for the liquid working fluid which is driven by the high energy vapor of the system. The pumping apparatus and the pump driving apparatus are both contained in a single, totally enclosed, sealed housing.
Inventors
- 👤 John Roper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:14
CPC Classifications
B; B60; B60T; B60T13/00; B60T13/10; B60T13/12; B60T13/16; B60T13/168
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
359 words
A thermally activated power system comprising: a. means for vaporizing a working fluid with heat; b. a brake motor wherein the vaporized working fluid is expanded to produce mechanical power, said motor communicating with said vaporizing means; c. a vehicle brake operatively connected with said brake motor for receiving mechanical power therefrom; d. a condenser for liquifying the working fluid after it has been expanded in said motor, said condenser communicating with said motor; e. a feed pump for moving and pressurizing the working fluiD which has been liquified in said condenser, said feed pump communicating with said vaporizing means and said condenser; f. said feed pump having a housing with a first end and a second end; g. said housing having a first bore portion therein, one end of said first bore being disposed in the vacinity of said first end of said housing; h. said housing having a second bore portion therein, one end of said second bore being disposed in the vacinity of said second end of said housing, said first and second bores joining each other at a point remote from said first and second ends of said housing; i. said feed pump having an elongated rod disposed in said first and second bores and axially movable therein; j. said rod having a plunger attached thereto at the end of said rod nearest said first end of said housing, said plunger being disposed in said first bore and being axially movable therein; k. said rod having a piston attached thereto in spaced apart relation with said plunger, said piston being disposed in said second bore and being axially movable therein; l. said feed pump having an inlet valve means in said housing, said inlet valve means being associated with said second bore for controlling flow into said second bore; and m. said feed pump having a cam means in said second bore, said cam means co-operating with said inlet valve means and said exhaust valve means, said cam means being adapted for movement with said rod, the movement of said cam means being effective to actuate said inlet valve means and said exhaust valve means.
Claim 2
Dependent Claim
359 words
A thermally activated power system comprising: a. means for vaporizing a working fluid with heat; b. a brake motor wherein the vaporized working fluid is expanded to produce mechanical power, said motor communicating with said vaporizing means; c. a vehicle brake operatively connected with said brake motor for receiving mechanical power therefrom; d. a condenser for liquifying the working fluid after it has been expanded in said motor, said condenser communicating with said motor; e. a feed pump for moving and pressurizing the working fluiD which has been liquified in said condenser, said feed pump communicating with said vaporizing means and said condenser; f. said feed pump having a housing with a first end and a second end; g. said housing having a first bore portion therein, one end of said first bore being disposed in the vacinity of said first end of said housing; h. said housing having a second bore portion therein, one end of said second bore being disposed in the vacinity of said second end of said housing, said first and second bores joining each other at a point remote from said first and second ends of said housing; i. said feed pump having an elongated rod disposed in said first and second bores and axially movable therein; j. said rod having a plunger attached thereto at the end of said rod nearest said first end of said housing, said plunger being disposed in said first bore and being axially movable therein; k. said rod having a piston attached thereto in spaced apart relation with said plunger, said piston being disposed in said second bore and being axially movable therein; l. said feed pump having an inlet valve means in said housing, said inlet valve means being associated with said second bore for controlling flow into said second bore; and m. said feed pump having a cam means in said second bore, said cam means co-operating with said inlet valve means and said exhaust valve means, said cam means being adapted for movement with said rod, the movement of said cam means being effective to actuate said inlet valve means and said exhaust valve means.
Claim 3
Dependent Claim
60 words
A thermally activated power system as recited in claim 1, wherein said vaporizing means includes: a. a heat exhange means for conducting heat from the exhaust gases of an engine of a vehicle to said working fluid to vaporize the working fluid; b. a means for directing exhaust gases of an engine of a vehicle to said heat exhange means.
Claim 4
Dependent Claim
71 words
A thermally activated power system as recited in claim 2 further comprising: a. a brake valve communicating with said heat exchange means, said motor and said condenser, said brake valve controlling the flow of working fluid from said heat exchange means to said motor and from said motor to said condenser; b. a reservoir for collecting the working fluid, said reservoir communicating with said heat exchange means and said control valve.
Claim 5
Dependent Claim
28 words
A thermally activated power system as recited in claim 1, having a working fluid which circulates therethrough, said working fluid comprising carbon, chlorine and fluorine in chemical combination.
Claim 6
Dependent Claim
108 words
A thermally activated power brake system comprising: a. means for vaporizing a working fluid; b. a brake motor wherein the vaporized working fluid is expanded to produce mechanical braking power, said brake motor communicating with said vaporizing means; c. a vehicle brake operatively connected with said brake motor for receiving mechanical braking power therefrom; d. a condenser for liquefying the working fluid after it has been expanded in said brake motor, said condenser communicating with said brake motor; and e. a feed pump for moving and pressurizing the working fluid which has been liquified in said condenser, said feed pump communicating with said vaporizing means and said condenser.
Claim 7
Dependent Claim
108 words
A thermally activated power brake system comprising: a. means for vaporizing a working fluid; b. a brake motor wherein the vaporized working fluid is expanded to produce mechanical braking power, said brake motor communicating with said vaporizing means; c. a vehicle brake operatively connected with said brake motor for receiving mechanical braking power therefrom; d. a condenser for liquefying the working fluid after it has been expanded in said brake motor, said condenser communicating with said brake motor; and e. a feed pump for moving and pressurizing the working fluid which has been liquified in said condenser, said feed pump communicating with said vaporizing means and said condenser.
Claim 8
Dependent Claim
29 words
A thermally activated power brake system as recited in claim 5, having a working fluid which circulates therethrough, said working fluid comprising carbon, chlorine and fluorine in chemical combination.
Claim 9
Dependent Claim
17 words
A thermally activated power brake system as recited in claim 6, wherein the working fluid is dichlorodifluoromethane.
Claim 10
Dependent Claim
61 words
A thermally activated power brake system as recited in claim 5, wherein said vaporizing means includes: a. a heat exchange means for conducting heat from the exhaust gases of an engine of a vehicle to said working fluid to vaporize said working fluid; b. a means for directing exhaust gases of an engine of a vehicle to said heat exchange means.
Claim 11
Dependent Claim
21 words
A thermally activated power brake system as recited in claim 8, wherein said heat exchange means is a coil of tubing.
Claim 12
Dependent Claim
55 words
A thermally activated power brake system as recited in claim 8, further comprising a brake valve communicating with said heat exchange means, said vehicle brake and said condenser, said brake valve controlling the flow of said working fluid from said heat exchange means to said vehicle brake and from said vehicle brake to said condenser.
Claim 13
Dependent Claim
45 words
A thermally activated power brake system as recited in claim 10, further comprising: a. a foot pedal connected with said brake valve for actuating said brake valve; b. a reservoir communicating with said heat exchange means and said brake valve for collecting said working fluid.
Claim 14
Dependent Claim
19 words
A thermally activated power brake system as recited in claim 5, wherein said vehicle brake is a disc brake.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-25 | 1975-10-25 | 1976-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-25 | 1979-10-25 | 1980-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-25 | 1983-10-25 | 1984-04-25 | $7700.00 | Window Closed / Lapsed |