US3902819A
Expired / Lapsed
US
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Method and apparatus for cooling a turbomachinery blade
Assignee: RTX Corp
•
Filing: 1973-06-04
•
Granted: 1975-09-02
•
Expires: 1993-06-04
Abstract
Abstract A turbomachinery blade operating at elevated temperature and in a strong centrifugal field is cooled by a coolant loop located within the blade constituting an open, mixed convection, thermosyphon system utilizing water as the coolant and establishing density differentials in the coolant within the loop by injecting cooler water into one portion of the loop and extracting coolant fluid from another portion of the loop to maintain system pressure and coolant mass at desired levels to thereby establish continuous coolant recirculation within the coolant loop.
Inventors
- 👤 Jacob Holchendler
- 👤 David Japikse
- 👤 William F Laverty
- 👤 James J Wesbecher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:19
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/12; F01D5/14; F01D5/18; F01D5/185; Y; Y02; Y02T; Y02T50/00; Y02T50/60
Claims Analysis
Total Claims: 126
Claim 1
Independent Claim
170 words
A turbomachinery blade adapted to be mounted for rotation on a disc and to have hot gas pass thereover so as to thereby be subjected to both centrifugal force and high temperature including: 1. a coolant loop within the blade, 2. a cooling fluid filling said loop, 3. heat sink establishing means acting upon the cooling fluid in one portion of said loop to establish a temperature and hence a density differential between the cooling fluid in different parts of said coolant loop to thereby establish a continuous circulatory flow and recirculation of cooling fluid within the coolant loop utilizing the thermal syphon principle, and 4. wherein said heat sink establishing means comprises a means for injecting a coolant at lesser temperature than the cooling fluid into said coolant loop at a selected location, and means to discharge cooling fluid from the coolant loop at the same rate that coolant is being injected into the coolant loop to thereby maintain selected pressure level and coolant mass in the coolant loop.
Claim 2
Dependent Claim
170 words
A turbomachinery blade adapted to be mounted for rotation on a disc and to have hot gas pass thereover so as to thereby be subjected to both centrifugal force and high temperature including: 1. a coolant loop within the blade, 2. a cooling fluid filling said loop, 3. heat sink establishing means acting upon the cooling fluid in one portion of said loop to establish a temperature and hence a density differential between the cooling fluid in different parts of said coolant loop to thereby establish a continuous circulatory flow and recirculation of cooling fluid within the coolant loop utilizing the thermal syphon principle, and 4. wherein said heat sink establishing means comprises a means for injecting a coolant at lesser temperature than the cooling fluid into said coolant loop at a selected location, and means to discharge cooling fluid from the coolant loop at the same rate that coolant is being injected into the coolant loop to thereby maintain selected pressure level and coolant mass in the coolant loop.
Claim 3
Dependent Claim
6 words
a cooling fluid filling said loop,
Claim 4
Dependent Claim
6 words
a cooling fluid filling said loop,
Claim 5
Dependent Claim
30 words
A blade according to claim 1 wherein the cooling fluid is steam above critical temperature and pressure and wherein the coolant is water above critical pressure and at low temperature.
Claim 6
Dependent Claim
17 words
filling said passages with fluid which will be in the supercritical state at blade operating conditions, and
Claim 7
Dependent Claim
17 words
filling said passages with fluid which will be in the supercritical state at blade operating conditions, and
Claim 8
Dependent Claim
60 words
a blade airfoil section shaped to define the blade tip, the blade leading edge and trailing edge and attached to the blade root to extend radially outwardly therefrom when the blade is mounted on the disc and shaped to dEfine therewithin a passage system including a series of substantially radially extending passages joining an outboard header and an inboard header,
Claim 9
Dependent Claim
60 words
a blade airfoil section shaped to define the blade tip, the blade leading edge and trailing edge and attached to the blade root to extend radially outwardly therefrom when the blade is mounted on the disc and shaped to dEfine therewithin a passage system including a series of substantially radially extending passages joining an outboard header and an inboard header,
Claim 10
Dependent Claim
23 words
means to extract fluid from said passage system at the same rate that the cooling fluid is being introduced to said passage system.
Claim 11
Dependent Claim
23 words
means to extract fluid from said passage system at the same rate that the cooling fluid is being introduced to said passage system.
Claim 12
Dependent Claim
94 words
means to extract fluid from said passage system at the same rate that the cooling fluid is being introduced to said passage system, and, further, wherein said blade has at least one aperture in the blade trailing edge and wherein the extracted fluid is discharged through apertures in the blade trailing edge to cool the blade trailing edge, and, still further, wherein said fluid extraction means includes an orifice joining one of said headers to a blade trailing edge header which is connected to the hot gas stream through said blade trailing edge apertures.
Claim 13
Dependent Claim
94 words
means to extract fluid from said passage system at the same rate that the cooling fluid is being introduced to said passage system, and, further, wherein said blade has at least one aperture in the blade trailing edge and wherein the extracted fluid is discharged through apertures in the blade trailing edge to cool the blade trailing edge, and, still further, wherein said fluid extraction means includes an orifice joining one of said headers to a blade trailing edge header which is connected to the hot gas stream through said blade trailing edge apertures.
Claim 14
Dependent Claim
60 words
a blade airfoil section shaped to define the blade tip, the blade leading edge and trailing edge and attached to the blade root to extend radially outwardly therefrom when the blade is mounted on the disc and shaped to define therewithin a passage system including a series of substantially radially extending passages joining an outboard header and and inboard header,
Claim 15
Dependent Claim
60 words
a blade airfoil section shaped to define the blade tip, the blade leading edge and trailing edge and attached to the blade root to extend radially outwardly therefrom when the blade is mounted on the disc and shaped to define therewithin a passage system including a series of substantially radially extending passages joining an outboard header and and inboard header,
Claim 16
Dependent Claim
60 words
a blade airfoil section shaped to define the blade tip, the blade leading edge and trailing edge and attached to the blade root to extend radially outwardly therefrom when the blade is mounted on the disc and shaped to define therewithin a passage system including a series of substantially radially extending passages joining an outboard header and an inboard header,
Claim 17
Dependent Claim
60 words
a blade airfoil section shaped to define the blade tip, the blade leading edge and trailing edge and attached to the blade root to extend radially outwardly therefrom when the blade is mounted on the disc and shaped to define therewithin a passage system including a series of substantially radially extending passages joining an outboard header and an inboard header,
Claim 18
Dependent Claim
103 words
means to extract fluid from said passage system at the same rate that the cooling fluid is being introduced to said passage system, and, further, wherein said blade has at least one aperture in the blade trailing edge and wherein the extracted fluid is discharged through apertures in the blade trailing edge to cool the blade trailing edge, and, still further, wherein said fluid extraction means includes an orifice joining one of said headers to a blade trailing edge header which is connected to the hot gas stream through said blade trailing edge apertures, and wherein said one header is the inboard header.
Claim 19
Dependent Claim
103 words
means to extract fluid from said passage system at the same rate that the cooling fluid is being introduced to said passage system, and, further, wherein said blade has at least one aperture in the blade trailing edge and wherein the extracted fluid is discharged through apertures in the blade trailing edge to cool the blade trailing edge, and, still further, wherein said fluid extraction means includes an orifice joining one of said headers to a blade trailing edge header which is connected to the hot gas stream through said blade trailing edge apertures, and wherein said one header is the inboard header.
Claim 20
Dependent Claim
105 words
means to extract fluid from said passage system at the same rate that the cooling fluid is being introduced to said passage system, and, further, wherein said blade has at least one aperture in the blade trailing edge and wherein the extracted fluid is discharged through apertures in the blade trailing edge to cool the blade trailing Edge, and, still further, wherein said fluid extraction means includes an orifice joining one of said headers to a blade trailing edge header which is connected to the hot gas stream through said blade trailing edge apertures, and wherein said orifice is caused to operate in chocked condition.
Claim 21
Dependent Claim
105 words
means to extract fluid from said passage system at the same rate that the cooling fluid is being introduced to said passage system, and, further, wherein said blade has at least one aperture in the blade trailing edge and wherein the extracted fluid is discharged through apertures in the blade trailing edge to cool the blade trailing Edge, and, still further, wherein said fluid extraction means includes an orifice joining one of said headers to a blade trailing edge header which is connected to the hot gas stream through said blade trailing edge apertures, and wherein said orifice is caused to operate in chocked condition.
Claim 22
Dependent Claim
60 words
a blade airfoil section shaped to define the blade tip, the blade leading edge and trailing edge and attached to the blade root to extend radially outwardly therefrom when the blade is mounted on the disc and shaped to define therewithin a passage system including a series of substantially radially extending passages joining an outboard header and an inboard header,
Claim 23
Dependent Claim
60 words
a blade airfoil section shaped to define the blade tip, the blade leading edge and trailing edge and attached to the blade root to extend radially outwardly therefrom when the blade is mounted on the disc and shaped to define therewithin a passage system including a series of substantially radially extending passages joining an outboard header and an inboard header,
Claim 24
Dependent Claim
60 words
a blade airfoil section shaped to define the blade tip, the blade leading edge and trailing edge and attached to the blade root to extend radially outwardly therefrom when the blade is mounted on the disc and shaped to define therewithin a passage system including a series of substantially radially extending passages joining an outboard header and an inboard header,
Claim 25
Dependent Claim
60 words
a blade airfoil section shaped to define the blade tip, the blade leading edge and trailing edge and attached to the blade root to extend radially outwardly therefrom when the blade is mounted on the disc and shaped to define therewithin a passage system including a series of substantially radially extending passages joining an outboard header and an inboard header,
Claim 26
Dependent Claim
5 words
filling said passages with fluid,
Claim 27
Dependent Claim
5 words
filling said passages with fluid,
Claim 28
Dependent Claim
5 words
filling said passages with fluid,
Claim 29
Dependent Claim
5 words
filling said passages with fluid,
Claim 30
Dependent Claim
5 words
filling said passages with fluid,
Claim 31
Dependent Claim
5 words
filling said passages with fluid,
Claim 32
Dependent Claim
5 words
filling said passages with fluid,
Claim 33
Dependent Claim
5 words
filling said passages with fluid,
Claim 34
Dependent Claim
62 words
a blade airfoil section shaped to define the blade tip, the blade leading edge and trailing edge and attached to the blade root to extend radially outwardly therefrom when the blade is mounted on the disc and shaped to define therewithin a selectively shaped passage system including a series of substantially radially extending passage joining an outboard header and an inboard header,
Claim 35
Dependent Claim
62 words
a blade airfoil section shaped to define the blade tip, the blade leading edge and trailing edge and attached to the blade root to extend radially outwardly therefrom when the blade is mounted on the disc and shaped to define therewithin a selectively shaped passage system including a series of substantially radially extending passage joining an outboard header and an inboard header,
Claim 36
Dependent Claim
58 words
means to extract fluid from said passage system at the same rate that the cooling fluid is being introduced to said passage system, and, further, wherein said blade has at least one aperture in the blade trailing edge and wherein the extracted fluid is discharged through apertures in the blade trailing edge to cool the blade trailing edge.
Claim 37
Dependent Claim
58 words
means to extract fluid from said passage system at the same rate that the cooling fluid is being introduced to said passage system, and, further, wherein said blade has at least one aperture in the blade trailing edge and wherein the extracted fluid is discharged through apertures in the blade trailing edge to cool the blade trailing edge.
Claim 38
Dependent Claim
60 words
a blade airfoil section shaped to define the blade tip, the blade leading edge and trailing edge and attached to the blade root to extend radially outwardly therefrom when the blade is mounted on the disc and shaped to define therewithin a passage system including a series of substantially radially extending passages joining an outboard header and an inboard header,
Claim 39
Dependent Claim
60 words
a blade airfoil section shaped to define the blade tip, the blade leading edge and trailing edge and attached to the blade root to extend radially outwardly therefrom when the blade is mounted on the disc and shaped to define therewithin a passage system including a series of substantially radially extending passages joining an outboard header and an inboard header,
Claim 40
Dependent Claim
52 words
means to extract fluid from said passage system at the same rate that the cooling fluid is being introduced to said passage system, and wherein said system circulatory fluid is steam above critical pressure and temperature and wherein said lower temperature cooling fluid is water above critical pressure and at low temperature.
Claim 41
Dependent Claim
52 words
means to extract fluid from said passage system at the same rate that the cooling fluid is being introduced to said passage system, and wherein said system circulatory fluid is steam above critical pressure and temperature and wherein said lower temperature cooling fluid is water above critical pressure and at low temperature.
Claim 42
Dependent Claim
17 words
a blade tip located at the end of the blade airfoil section opposite to the blade root,
Claim 43
Dependent Claim
17 words
a blade tip located at the end of the blade airfoil section opposite to the blade root,
Claim 44
Dependent Claim
120 words
establishing a density differential between the fluid in at least one of said passages and the fluid in the remaining passages to establish continuous circulation and recirculation of fluid radially inwardly through the passages having the less dense fluid and radially outwardly through the passage having the more dense fluid to thereby cool the blade, and wherein said last step includes cooling the temperature of the fluid in at least one of the passages by direct heat sink injection to increase its density so that, in accordance with the thermosyphon principle, the more dense fluid will flow radially outwardly to the tip header and the less dense fluid will flow radially inwardly to the root header establish blade coolant circulation.
Claim 45
Dependent Claim
120 words
establishing a density differential between the fluid in at least one of said passages and the fluid in the remaining passages to establish continuous circulation and recirculation of fluid radially inwardly through the passages having the less dense fluid and radially outwardly through the passage having the more dense fluid to thereby cool the blade, and wherein said last step includes cooling the temperature of the fluid in at least one of the passages by direct heat sink injection to increase its density so that, in accordance with the thermosyphon principle, the more dense fluid will flow radially outwardly to the tip header and the less dense fluid will flow radially inwardly to the root header establish blade coolant circulation.
Claim 46
Dependent Claim
17 words
a blade tip located at the end of the blade airfoil section opposite to the blade root,
Claim 47
Dependent Claim
17 words
a blade tip located at the end of the blade airfoil section opposite to the blade root,
Claim 48
Dependent Claim
108 words
establishing a density differential between the fluid in at least one of said passages and the fluid in the remaining passages to establish continuous circulation and recirculation of fluid radially inwardly through the passages having the less dense fluid and radially outwardly through the passage having the more dense fluid to thereby cool the blade, and including the additional step of controlling the density differentials so established in the fluid so as to control the recirculation rate of the cooling fluid in the passages, the operating temperatures of the fluid being circulated, the rate of heat removal from the blade into the cooling fluid, and blade metal temperature.
Claim 49
Dependent Claim
108 words
establishing a density differential between the fluid in at least one of said passages and the fluid in the remaining passages to establish continuous circulation and recirculation of fluid radially inwardly through the passages having the less dense fluid and radially outwardly through the passage having the more dense fluid to thereby cool the blade, and including the additional step of controlling the density differentials so established in the fluid so as to control the recirculation rate of the cooling fluid in the passages, the operating temperatures of the fluid being circulated, the rate of heat removal from the blade into the cooling fluid, and blade metal temperature.
Claim 50
Dependent Claim
126 words
establishing a density differential between the fluid in at least one of said passages and the fluid in the remaining passages to establish continuous circulation and recirculation of fluid radially inwardly through the passages having the less dense fluid and radially outwardly through the passage having the more dense fluid to thereby cool the blade, and wherein the cooling fluid is supercritical and wherein water at a temperature less than the supercritical is introduced to one of the passages to establish a heat sink to produce the desired density differential, and wherein supercritical steam is bled from the system at the same rate that cooling water is added to the system to maintain the coolant mass pressure, and the density differential substantially constant in the system.
Claim 51
Dependent Claim
126 words
establishing a density differential between the fluid in at least one of said passages and the fluid in the remaining passages to establish continuous circulation and recirculation of fluid radially inwardly through the passages having the less dense fluid and radially outwardly through the passage having the more dense fluid to thereby cool the blade, and wherein the cooling fluid is supercritical and wherein water at a temperature less than the supercritical is introduced to one of the passages to establish a heat sink to produce the desired density differential, and wherein supercritical steam is bled from the system at the same rate that cooling water is added to the system to maintain the coolant mass pressure, and the density differential substantially constant in the system.
Claim 52
Dependent Claim
157 words
establishing a density differential between the fluid in at least one of said passages and the fluid in the remaining passages to establish continuous circulation and recirculation of fluid radially inwardly through the passages having the less dense fluid and radially outwardly through the passage having the more dense fluid to thereby cool the blade, and wherein the cooling fluid is supercritical and wherein water at a temperature less than the supercritical is introduced to one of the passages to establish a heat sink to produce the desired density differential, and wherein supercritical steam is bled from the system at the same rate that cooling water is added to the system to maintain the coolant mass pressure, and the density differential substantially constant in the system, and, further, wherein the heat sink is positioned remote from the system bleed so as to achieve maximum effective mixing with single phase fluids and maintain constant steady state circulation rates.
Claim 53
Dependent Claim
157 words
establishing a density differential between the fluid in at least one of said passages and the fluid in the remaining passages to establish continuous circulation and recirculation of fluid radially inwardly through the passages having the less dense fluid and radially outwardly through the passage having the more dense fluid to thereby cool the blade, and wherein the cooling fluid is supercritical and wherein water at a temperature less than the supercritical is introduced to one of the passages to establish a heat sink to produce the desired density differential, and wherein supercritical steam is bled from the system at the same rate that cooling water is added to the system to maintain the coolant mass pressure, and the density differential substantially constant in the system, and, further, wherein the heat sink is positioned remote from the system bleed so as to achieve maximum effective mixing with single phase fluids and maintain constant steady state circulation rates.
Claim 54
Dependent Claim
17 words
a blade tip located at the end of the blade airfoil section opposite to the blade root,
Claim 55
Dependent Claim
17 words
a blade tip located at the end of the blade airfoil section opposite to the blade root,
Claim 56
Dependent Claim
17 words
a blade tip located at the end of the blade airfoil section opposite to the blade root,
Claim 57
Dependent Claim
17 words
a blade tip located at the end of the blade airfoil section opposite to the blade root,
Claim 58
Dependent Claim
17 words
a blade tip located at the end of the blade airfoil section opposite to the blade root,
Claim 59
Dependent Claim
17 words
a blade tip located at the end of the blade airfoil section opposite to the blade root,
Claim 60
Dependent Claim
17 words
a blade tip located at the end of the blade airfoil section opposite to the blade root,
Claim 61
Dependent Claim
17 words
a blade tip located at the end of the blade airfoil section opposite to the blade root,
Claim 62
Dependent Claim
55 words
establishing a density differential between the fluid in at least one of said passages and the fluid in the remaining passages to establish continuous circulation and recirculation of fluid radially inwardly through the passages having the less dense fluid and radially outwardly through the passage having the more dense fluid to thereby cool the blade.
Claim 63
Dependent Claim
55 words
establishing a density differential between the fluid in at least one of said passages and the fluid in the remaining passages to establish continuous circulation and recirculation of fluid radially inwardly through the passages having the less dense fluid and radially outwardly through the passage having the more dense fluid to thereby cool the blade.
Claim 64
Dependent Claim
17 words
a blade tip located at the end of the blade airfoil section opposite to the blade root,
Claim 65
Dependent Claim
17 words
a blade tip located at the end of the blade airfoil section opposite to the blade root,
Claim 66
Dependent Claim
20 words
A blade according to claim 2 wherein the fluid extracted from the coolant loop is discharged through the blade walls.
Claim 67
Dependent Claim
57 words
heat sink establishing means acting upon the cooling fluid in one portion of said loop to establish a temperature and hence a density differential between the cooling fluid in different parts of said coolant loop to thereby establish a continuous circulatory flow and recirculation of cooling fluid within the coolant loop utilizing the thermal syphon principle, and
Claim 68
Dependent Claim
57 words
heat sink establishing means acting upon the cooling fluid in one portion of said loop to establish a temperature and hence a density differential between the cooling fluid in different parts of said coolant loop to thereby establish a continuous circulatory flow and recirculation of cooling fluid within the coolant loop utilizing the thermal syphon principle, and
Claim 69
Dependent Claim
64 words
wherein said heat sink establishing means comprises a means for injecting a coolant at lesser temperature than the cooling fluid into said coolant loop at a selected location, and means to discharge cooling fluid from the coolant loop at the same rate that coolant is being injected into the coolant loop to thereby maintain selected pressure level and coolant mass in the coolant loop.
Claim 70
Dependent Claim
64 words
wherein said heat sink establishing means comprises a means for injecting a coolant at lesser temperature than the cooling fluid into said coolant loop at a selected location, and means to discharge cooling fluid from the coolant loop at the same rate that coolant is being injected into the coolant loop to thereby maintain selected pressure level and coolant mass in the coolant loop.
Claim 71
Dependent Claim
27 words
A blade according to claim 3, which blade has discharged slots in the blade trailing edge and wherein the fluid is discharged through said trailing edge slots.
Claim 72
Dependent Claim
12 words
a fluid filling said headers and said passages for circulation therein, and
Claim 73
Dependent Claim
12 words
a fluid filling said headers and said passages for circulation therein, and
Claim 74
Dependent Claim
12 words
a fluid filling said headers and said passages for circulation therein, and
Claim 75
Dependent Claim
12 words
a fluid filling said headers and said passages for circulation therein, and
Claim 76
Dependent Claim
12 words
a fluid filling said headers and said passages for circulation therein, and
Claim 77
Dependent Claim
12 words
a fluid filling said headers and said passages for circulation therein, and
Claim 78
Dependent Claim
12 words
a fluid filling said headers and said passages for circulation therein, and
Claim 79
Dependent Claim
12 words
a fluid filling said headers and said passages for circulation therein, and
Claim 80
Dependent Claim
12 words
a fluid filling said headers and said passages for circulation therein, and
Claim 81
Dependent Claim
12 words
a fluid filling said headers and said passages for circulation therein, and
Claim 82
Dependent Claim
14 words
a fluid which will operate at a supercritical state at blade operating conditions, and
Claim 83
Dependent Claim
14 words
a fluid which will operate at a supercritical state at blade operating conditions, and
Claim 84
Dependent Claim
12 words
a fluid filling said headers and said passages for circulation therein, and
Claim 85
Dependent Claim
12 words
a fluid filling said headers and said passages for circulation therein, and
Claim 86
Dependent Claim
61 words
means to establish a density differential in the fluid in said passages and thereby establish continuous circulatory flow of said fluid radially outwardly through at least one of said radial passages, through said outboard header, radially inwardly through at least one of said radial passages and said inboard header in multi-pass, recirculation fashion, and wherein said density differential establishing means including:
Claim 87
Dependent Claim
61 words
means to establish a density differential in the fluid in said passages and thereby establish continuous circulatory flow of said fluid radially outwardly through at least one of said radial passages, through said outboard header, radially inwardly through at least one of said radial passages and said inboard header in multi-pass, recirculation fashion, and wherein said density differential establishing means including:
Claim 88
Dependent Claim
53 words
means to establish a density differential in the fluid in said passages and thereby establish continuous circulatory flow of said fluid radially outwardly through at least one of said radial passages, through said outboard header, radially inwardly through at least one of said radial passages and said inboard header in multi-pass, recirculation fashion.
Claim 89
Dependent Claim
53 words
means to establish a density differential in the fluid in said passages and thereby establish continuous circulatory flow of said fluid radially outwardly through at least one of said radial passages, through said outboard header, radially inwardly through at least one of said radial passages and said inboard header in multi-pass, recirculation fashion.
Claim 90
Dependent Claim
61 words
means to establish a density differential in the fluid in said passages and thereby establish continuous circulatory flow of said fluid radially outwardly through at least one of said radial passages, through said outboard header, radially inwardly through at least one of said radial passages and said inboard header in multi-pass, recirculation fashion, and wherein said density differential establishing means including:
Claim 91
Dependent Claim
61 words
means to establish a density differential in the fluid in said passages and thereby establish continuous circulatory flow of said fluid radially outwardly through at least one of said radial passages, through said outboard header, radially inwardly through at least one of said radial passages and said inboard header in multi-pass, recirculation fashion, and wherein said density differential establishing means including:
Claim 92
Dependent Claim
61 words
means to establish a density differential in the fluid in said passages and thereby establish continuous circulatory flow of said fluid radially outwardly through at least one of said radial passages, through said outboard header, radially inwardly through at least one of said radial passages and said inboard header in multi-pass, recirculation fashion, and wherein said density differential establishing means including:
Claim 93
Dependent Claim
61 words
means to establish a density differential in the fluid in said passages and thereby establish continuous circulatory flow of said fluid radially outwardly through at least one of said radial passages, through said outboard header, radially inwardly through at least one of said radial passages and said inboard header in multi-pass, recirculation fashion, and wherein said density differential establishing means including:
Claim 94
Dependent Claim
61 words
means to establish a density differential in the fluid in said passages and thereby establish continuous circulatory flow of said fluid radially outwardly through at least one of said radial passages, through said outboard header, radially inwardly through at least one of said radial passages and said inboard header in mulit-pass, recirculation fashion, and wherein said density differential establishing means including:
Claim 95
Dependent Claim
61 words
means to establish a density differential in the fluid in said passages and thereby establish continuous circulatory flow of said fluid radially outwardly through at least one of said radial passages, through said outboard header, radially inwardly through at least one of said radial passages and said inboard header in mulit-pass, recirculation fashion, and wherein said density differential establishing means including:
Claim 96
Dependent Claim
61 words
means to establish a density differential in the fluid in said passages and thereby establish continuous circulatory flow of said fluid radially outwardly through at least one of said radial passages, through said outboard header, radially inwardly through at least one of said radial passages and said inboard header in multi-pass, recirculation fashion, and wherein said density differential establishing means including:
Claim 97
Dependent Claim
61 words
means to establish a density differential in the fluid in said passages and thereby establish continuous circulatory flow of said fluid radially outwardly through at least one of said radial passages, through said outboard header, radially inwardly through at least one of said radial passages and said inboard header in multi-pass, recirculation fashion, and wherein said density differential establishing means including:
Claim 98
Dependent Claim
61 words
means to establish a density differential in the fluid in said passages and thereby establish continuous circulatory flow of said fluid radially outwardly through at least one of said radial passages, through said outboard header, radially inwardly through at least one of said radial passages and said inboard header in multi-pass, recirculation fashion, and wherein said density differential establishing means including:
Claim 99
Dependent Claim
61 words
means to establish a density differential in the fluid in said passages and thereby establish continuous circulatory flow of said fluid radially outwardly through at least one of said radial passages, through said outboard header, radially inwardly through at least one of said radial passages and said inboard header in multi-pass, recirculation fashion, and wherein said density differential establishing means including:
Claim 100
Dependent Claim
54 words
A blade according to claim 1 wherein said blade comprises an outer cover defining the blade tip and airfoil section walls and an inner member inserted thereinto in blade-in-scabbard fashion and sealably connected thereto, with both the blade outer cover portion and the blade inner portion being selectively shaped to define said coolant loop.
Claim 101
Dependent Claim
27 words
A blade according to claim 1 and including means to control coolant circulation rate and temperature, rate of heat removal from and the temperature of the blade.
Claim 102
Dependent Claim
20 words
A blade according to claim 1 and including means to control the amount of coolant discharged from the coolant loop.
Claim 103
Independent Claim
15 words
The method of cooling a turbomachinery blade utilizing the thermosyphon principle including the steps of:
Claim 104
Independent Claim
15 words
The method of cooling a turbomachinery blade utilizing the thermosyphon principle including the steps of:
Claim 105
Dependent Claim
33 words
A turbomachinery blade adopted to be mounted for rotation on a disc and to have hot gas passed thereover so as to thereby be subjected both to centrifugal force and high temperatUre including:
Claim 106
Dependent Claim
33 words
A turbomachinery blade adopted to be mounted for rotation on a disc and to have hot gas passed thereover so as to thereby be subjected both to centrifugal force and high temperatUre including:
Claim 107
Independent Claim
15 words
The method of cooling a turbomachinery blade utilizing the thermosyphon principle including the steps of:
Claim 108
Independent Claim
15 words
The method of cooling a turbomachinery blade utilizing the thermosyphon principle including the steps of:
Claim 109
Independent Claim
15 words
The method of cooling a turbomachinery blade utilizing the thermosyphon principle including the steps of:
Claim 110
Independent Claim
15 words
The method of cooling a turbomachinery blade utilizing the thermosyphon principle including the steps of:
Claim 111
Independent Claim
15 words
The method of cooling a turbomachinery blade utilizing the thermosyphon principle including the steps of:
Claim 112
Independent Claim
15 words
The method of cooling a turbomachinery blade utilizing the thermosyphon principle including the steps of:
Claim 113
Independent Claim
15 words
The method of cooling a turbomachinery blade utilizing the thermosyphon principle including the steps of:
Claim 114
Independent Claim
15 words
The method of cooling a turbomachinery blade utilizing the thermosyphon principle including the steps of:
Claim 115
Dependent Claim
33 words
A turbomachinery blade adapted to be mounted for rotation on a disc and to have hot gas passed thereover so as to thereby be subjected both to centrifugal force and high temperature including:
Claim 116
Dependent Claim
33 words
A turbomachinery blade adapted to be mounted for rotation on a disc and to have hot gas passed thereover so as to thereby be subjected both to centrifugal force and high temperature including:
Claim 117
Dependent Claim
33 words
A turbomachinery blade adapted to be mounted for rotation on a disc and to have hot gas passed thereover so as to thereby be subjected both to centrifugal force and high temperature including:
Claim 118
Dependent Claim
33 words
A turbomachinery blade adapted to be mounted for rotation on a disc and to have hot gas passed thereover so as to thereby be subjected both to centrifugal force and high temperature including:
Claim 119
Dependent Claim
33 words
A turbomachinery blade adapted to be mounted for rotation on a disc and to have hot gas passed thereover so as to thereby be subjected both to centrifugal force and high temperature including:
Claim 120
Dependent Claim
33 words
A turbomachinery blade adapted to be mounted for rotation on a disc and to have hot gas passed thereover so as to thereby be subjected both to centrifugal force and high temperature including:
Claim 121
Dependent Claim
33 words
A turbomachinery blade adapted to be mounted for rotation on a disc and to have hot gas passed thereover so as to thereby be subjected both to centrifugal force and high temperature including:
Claim 122
Dependent Claim
33 words
A turbomachinery blade adapted to be mounted for rotation on a disc and to have hot gas passed thereover so as to thereby be subjected both to centrifugal force and high temperature including:
Claim 123
Dependent Claim
33 words
A turbomachinery blade adpated to be mounted for rotation on a disc and to have hot gas passed thereover so as to thereby be subjected both to centrifugal force and high temperature including:
Claim 124
Dependent Claim
33 words
A turbomachinery blade adpated to be mounted for rotation on a disc and to have hot gas passed thereover so as to thereby be subjected both to centrifugal force and high temperature including:
Claim 125
Dependent Claim
33 words
A turbomachinery blade adapted to be mounted for rotation on a disc and to have hot gas passed thereover so as to thereby be subjected both to centrifugal force and high temperature including:
Claim 126
Dependent Claim
33 words
A turbomachinery blade adapted to be mounted for rotation on a disc and to have hot gas passed thereover so as to thereby be subjected both to centrifugal force and high temperature including:
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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) | 1978-09-01 | 1979-03-03 | 1979-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-01 | 1983-03-03 | 1983-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-01 | 1987-03-03 | 1987-09-02 | $7700.00 | Window Closed / Lapsed |