Patent US3584972A successfully refreshed from Google Patents.
US3584972A
Expired / Lapsed
US
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Laminated porous metal
Assignee: Motors Liquidation Co
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Filing: 1966-02-09
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Granted: 1971-06-15
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Expires: 1986-02-09
Abstract
Abstract A sheet material of a controlled porous characteristic made up of two or more metal laminae bonded together, the laminae being photo etched or otherwise machined to define pores through the laminae and also passages between the abutting faces of the laminae. The passages may be spaces between bosses on the laminae or grooves in the faces of the laminae. The sheet may be formed into a turbine blade facing or other hot part of a gas turbine. In the case of a blade facing, the leading edge may have pores for direct discharge of film cooling air. The permeability to fluid flow may be varied over the area of the sheet.
Inventors
- 👤 Nick F Bratkovich
- 👤 George B Meginnis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:50
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/12; F01D5/14; F01D5/18; F01D5/182; F01D5/184; B; B21; B21D; B21D53/00; B21D53/78; B22; B22F; B22F3/00; B22F3/10; B22F3/11; B22F3/1103; B22F3/1115; F23; F23R; F23R3/00; F23R3/002; F23R2900/00; F23R2900/03041; Y; Y02; Y02T; Y02T50/00; Y02T50/60; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316; Y10T29/49336; Y10T29/49339; Y10T29/49341; Y10T428/00; Y10T428/12; Y10T428/12229; Y10T428/12271; Y10T428/12361; Y10T428/12458; Y10T428/12479; Y10T428/24; Y10T428/24479; Y10T428/2457
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
92 words
A metal sheet of controlled porosity comprising at least two metal laminae abutting one another in face-to-face relation and bonded together at each interface between adjacent laminae, each lamina being provided with pores of controlled size extending through the lamina and distributed over the area of the lamina, the pores of adjacent laminae being out of register, and at least one of the two lamina faces at each interface having a surface relief defining passages of a predetermined order of magnitude interconnecting the pores in the laminae that abut at the interface.
Claim 2
Dependent Claim
92 words
A metal sheet of controlled porosity comprising at least two metal laminae abutting one another in face-to-face relation and bonded together at each interface between adjacent laminae, each lamina being provided with pores of controlled size extending through the lamina and distributed over the area of the lamina, the pores of adjacent laminae being out of register, and at least one of the two lamina faces at each interface having a surface relief defining passages of a predetermined order of magnitude interconnecting the pores in the laminae that abut at the interface.
Claim 3
Dependent Claim
22 words
A structure as defined by claim 1 in which the surface relief is provided by grooves extending generally parallelly aCross the face.
Claim 4
Dependent Claim
24 words
A structure as defined by claim 1 in which the surface relief is provided by mutually closely adjacent nonabutting lands arrayed on the face.
Claim 5
Dependent Claim
17 words
A structure as defined by claim 1 in which the pores are arrayed in a regular pattern.
Claim 6
Dependent Claim
19 words
A structure as defined by claim 1 in which the pores are arrayed in a pattern of controlled randomness.
Claim 7
Dependent Claim
20 words
A structure as defined by claim 1 in which the sheet comprises an outer, an intermediate, and an inner lamina.
Claim 8
Dependent Claim
34 words
A structure as defined by claim 6 in which the intermediate lamina bears grooves extending generally parallelly across each face, the grooves on one face extending generally perpendicularly to those on the other face.
Claim 9
Dependent Claim
20 words
A structure as defined by claim 7 in which the grooves are disposed randomly in modular areas of the face.
Claim 10
Dependent Claim
10 words
A sheet as defined by claim 1 of airfoil configuration.
Claim 11
Dependent Claim
137 words
A fluid deflecting element for a fluid dynamic machine comprising a blade facing formed to define an airfoil with leading and trailing edges and two blade faces extending from the leading edge toward the trailing edge, at least one face being cambered, the facing being a metal sheet of controlled porosity comprising at least two metal laminae abutting one another in face-to-face relation and bonded together at each interface between adjacent laminae, each lamina being provided with pores of controlled size extending through the lamina and distributed over the area of the lamina, the pores of adjacent laminae being out of register, and at least one of the two lamina faces at each interface having a surface relief defining passages of a predetermined order of magnitude interconnecting the pores in the laminae that abut at the interface.
Claim 12
Dependent Claim
137 words
A fluid deflecting element for a fluid dynamic machine comprising a blade facing formed to define an airfoil with leading and trailing edges and two blade faces extending from the leading edge toward the trailing edge, at least one face being cambered, the facing being a metal sheet of controlled porosity comprising at least two metal laminae abutting one another in face-to-face relation and bonded together at each interface between adjacent laminae, each lamina being provided with pores of controlled size extending through the lamina and distributed over the area of the lamina, the pores of adjacent laminae being out of register, and at least one of the two lamina faces at each interface having a surface relief defining passages of a predetermined order of magnitude interconnecting the pores in the laminae that abut at the interface.
Claim 13
Dependent Claim
22 words
A structure as defined by claim 10 in which the surface relief is provided by grooves extending generally parallelly across the face.
Claim 14
Dependent Claim
24 words
A structure as defined by claim 10 in which the surface relief is provided by mutually closely adjacent nonabutting lands arrayed on the face.
Claim 15
Dependent Claim
17 words
A structure as defined by claim 10 in which the pores are arrayed in a regular pattern.
Claim 16
Dependent Claim
19 words
A structure as defined by claim 10 in which the pores are arrayed in a pattern of controlled randomness.
Claim 17
Dependent Claim
25 words
A structure as defined by claim 10 in which the number of pores per unit area is varied as between diverse zones of a lamina.
Claim 18
Dependent Claim
20 words
A structure as defined by claim 10 in which the sheet comprises an outer, an intermediate, and an inner lamina.
Claim 19
Dependent Claim
34 words
A structure as defined by claim 16 in which the intermediate lamina bears grooves extending generally parallel across each face, the grooves on one face extending generally perpendicularly to those on the other face.
Claim 20
Dependent Claim
26 words
A structure as defined by claim 10 in which passages are provided substantially directly through the leading edge to provide an exit for film cooling air.
Claim 21
Dependent Claim
39 words
A structure as defined by claim 10 in which the structure of the sheet at its leading edge is less dense than at the faces so as to facilitate folding of the sheet without detriment to its porous features.
Claim 22
Dependent Claim
14 words
A sheet as defined by claim 1 composed of a high temperature resistant alloy.
Claim 23
Dependent Claim
19 words
A structure as defined by claim 10 in which the facing is composed of a high temperature resistant alloy.
Claim 24
Dependent Claim
18 words
A sheet as defined by claim 1 forming an element bounding a path for flow of hot gas.
Claim 25
Dependent Claim
23 words
A sheet as defined by claim 1 in which the permeability of the sheet has different values at different areas of the sheet.
Claim 26
Dependent Claim
26 words
A sheet as defined by claim 23 in which the pore size of at least one lamina has different values at different areas of the sheet.
Claim 27
Dependent Claim
26 words
A sheet as defined by claim 23 in which the pore concentration of at least one lamina has different values at different areas of the sheet.
Claim 28
Dependent Claim
27 words
A sheet as defined by claim 23 in which the permeability to flow of the said passages is of different magnitude at different areas of the sheet.
Claim 29
Dependent Claim
24 words
A structure as defined by claim 10 in which the permeability of the blade facing has different values at different areas of the facing.
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) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |