US3918846A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vapor generator feedwater pump
Assignee: Lear Motors Corp
•
Filing: 1973-07-19
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Granted: 1975-11-11
•
Expires: 1993-07-19
Abstract
Abstract The feedpump is capable of efficiently delivering feedwater at high pressure and maintain its positive flow into the boiler of the vapor generator of an automotive power system. Superheated steam is generated, in the order of 1,000*F and 1,000 psi. The mass of the vapor is controlled to drive a mechanical expander, as a turbine, in a Rankline operating cycle. The feedwater is pumped at the order of 1,000 psi, and involves water at inlet temperatures of several hundred degrees Fahrenheit. The pump is of the radial piston type; is quiet, efficient and compact. Further, the actuating fluid, as oil, is maintained completely separate from the working fluid or feedwater that is pumped, both fluids remaining uncontaminated. An important feature is the direct and effective means to variably control the delivery rate of the feedwater to the boiler. The feedpump may be designed for delivery of the working fluid up to 1,500 psi and higher if required. The pump has ample flow rate capability with inherent smoothness. Efficiencies of up to 90% have been attained at full displacement.
Inventors
- 👤 Max K Winkler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:22
CPC Classifications
F; F04; F04B; F04B1/00; F04B1/04; F04B1/0404; F04B1/0421; F04B1/0408; F04B1/0452; F04B43/00; F04B43/02; F04B43/06; F04B43/067
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
135 words
A fluid pump comprising: a plurality of pistons arranged for sequential operation with uniform mechanical strokes; a flexible diaphragm in the vicinity of each piston with fluid at the discharge face thereof and actuating oil between its opposite face and the piston; a cylinder in close fit relation about each piston with a port that coacts with an opening slot in the piston wall; an annular member displaceably mounted in the pump, said member being flat with equi-spaced peripheral slots, and a pin extending from each cylinder into one of the slots; and means for angularly positioning said member to correspondingly control the range in the stroke of oil vented through the piston slot and its port to thereupon establish the effective stroke of the piston in displacing oil under pressure against its associated diaphragm.
Claim 2
Dependent Claim
135 words
A fluid pump comprising: a plurality of pistons arranged for sequential operation with uniform mechanical strokes; a flexible diaphragm in the vicinity of each piston with fluid at the discharge face thereof and actuating oil between its opposite face and the piston; a cylinder in close fit relation about each piston with a port that coacts with an opening slot in the piston wall; an annular member displaceably mounted in the pump, said member being flat with equi-spaced peripheral slots, and a pin extending from each cylinder into one of the slots; and means for angularly positioning said member to correspondingly control the range in the stroke of oil vented through the piston slot and its port to thereupon establish the effective stroke of the piston in displacing oil under pressure against its associated diaphragm.
Claim 3
Dependent Claim
39 words
A fluid pump as claimed in claim 1, further including a limiter plate positioned adjacent each said diaphragm at its oil side to safely limit its respective displacement upon the cylical removal of pressure thereon from its associate piston.
Claim 4
Dependent Claim
32 words
A fluid pump as claimed in claim 2, in which said diaphragms are of elastomer material and normally curved towards their respective fluid chambers, and their respective limiter plates are similarly curved.
Claim 5
Dependent Claim
35 words
A fluid pump as claimed in claim 2, in which each said limiter plate is annularly mounted together with its associated diaphragm and contains apertures for the flow of actuation oil against its said diaphragm.
Claim 6
Dependent Claim
35 words
A fluid pump as claimed in claim 3, in which each said limiter plate is annularly mounted together with its associated diaphragm and contains apertures for the flow of actuation oil against its said diaphragm.
Claim 7
Dependent Claim
36 words
A fluid pump as claimed in claim 1 wherein said diaphragm is circular and supported annularly with its fluid discharge and actuation faces maintaining positive separation between the fluid and oil throughout operation of the pump.
Claim 8
Dependent Claim
39 words
A fluid pump as claimed in claim 6, further including a limiter plate positioned adjacent each said diaphragm at its oil side to safely limit its respective displacement upon the cylical removal of pressure thereon from its associate piston.
Claim 9
Dependent Claim
32 words
The fluid pump as claimed in claim 7, in which said diaphragms are of elastomer material and normally curved towards their respective fluid chambers, and their respective limiter plates are similarly curved.
Claim 10
Dependent Claim
21 words
A fluid pump as claimed in claim 1, in which said means is an annular member displaceably mounted in the pump.
Claim 11
Dependent Claim
41 words
A fluid pump as claimed in claim 9, in which each cylinder is mechanically coupled to said member in a manner to effect the angular resetting of said cylinders in correspondence with the position of said annular member in the pump.
Claim 12
Dependent Claim
32 words
A fluid pump as claimed in claim 1, in which said Annular member is flat and with equi-spaced peripheral slots, and a pin extending from each cylinder into one of the slots.
Claim 13
Dependent Claim
37 words
A fluid pump as claimed in claim 1, in which said port of each cylinder is predeterminedly shaped to effect the desired fluid discharge rate for a given pump speed at corresponding angular settings of said means.
Claim 14
Dependent Claim
37 words
A fluid pump as claimed in claim 10, in which said port of each cylinder is predeterminedly shaped to effect the desired fluid discharge rate for a given pump speed at corresponding angular settings of said member.
Claim 15
Dependent Claim
19 words
A fluid pump as claimed in claim 1, in which each piston is hollow and has an open end.
Claim 16
Dependent Claim
20 words
A fluid pump as claimed in claim 1, in which the wall opening in each piston is a longitudinal slot.
Claim 17
Dependent Claim
56 words
A fluid pump as claimed in claim 1, in which each piston is hollow and has an open end, and the wall opening in each piston is a longitudinal slot, a second longitudinal slot in each piston 180* opposite said first one, and a second port in each cylinder in coaction with the second piston slot.
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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) | 1978-11-10 | 1979-05-12 | 1979-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-10 | 1983-05-12 | 1983-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-10 | 1987-05-12 | 1987-11-11 | $7700.00 | Window Closed / Lapsed |