US4085792A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of casting lead alloy automotive battery parts
Assignee: General Battery Corp
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Filing: 1976-02-19
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Granted: 1978-04-25
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Expires: 1996-02-19
Abstract
Abstract A novel method of producing storage battery lead alloy parts is provided comprising the steps of (a) providing a grid mold having a mold substrate consisting essentially of aluminum, (b) hard surface anodizing at least a portion of said mold substrate to produce molding surface thereon, (c) introducing molten lead alloy into such mold against said molding surface and (d) allowing said lead alloy to cool to form said storage battery grid. Other steps which may be included as a novel method of the present invention including texturing the mold substrate prior to the hard surface anodizing step to form a discontinuous surface thereon, which texturing step may be accomplished by peening said substrate with shot, blasting said substrate with glass beads, or blasting said substrate with sand.
Inventors
- 👤 William J. Eberle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:11
CPC Classifications
B; B22; B22D; B22D25/00; B22D25/02; B22D25/04; B23; B23K; B23K37/00; B23K37/06; H; H01; H01M; H01M4/00; H01M4/02; H01M4/64; H01M4/70; H01M4/72; H01M4/73; H01M50/00; H01M50/50; H01M50/528; H01M50/529; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y10; Y10S; Y10S164/00; Y10S164/01; Y10S228/00; Y10S228/901
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
152 words
A method of producing a storage battery grid of uniform thickness comprising the steps of: (a) providing a grid mold having a mold substrate consisting essentially of aluminum and defining a grid mold cavity comprising a shallow lattice of thin grid strut mold voids having dimensions larger than those of the grid to be cast therein; (b) hard surface anodizing at least a portion of said mold substrate to produce an insulating molding surface thereon and to reduce the dimension of said grid mold cavity to the desired grid dimensions to be cast therein; (c) introducing molten lead alloy into said grid mold cavity against said insulating molding surface, said molding surface allowing said molten lead alloy to flow into and fill all of the interstices of said mold; and (d) allowing said lead alloy to cool to produce a dimensionally uniform storage battery grid comprising a lattice of thin lead struts.
Claim 2
Independent Claim
152 words
A method of producing a storage battery grid of uniform thickness comprising the steps of: (a) providing a grid mold having a mold substrate consisting essentially of aluminum and defining a grid mold cavity comprising a shallow lattice of thin grid strut mold voids having dimensions larger than those of the grid to be cast therein; (b) hard surface anodizing at least a portion of said mold substrate to produce an insulating molding surface thereon and to reduce the dimension of said grid mold cavity to the desired grid dimensions to be cast therein; (c) introducing molten lead alloy into said grid mold cavity against said insulating molding surface, said molding surface allowing said molten lead alloy to flow into and fill all of the interstices of said mold; and (d) allowing said lead alloy to cool to produce a dimensionally uniform storage battery grid comprising a lattice of thin lead struts.
Claim 3
Independent Claim
178 words
A method of producing a storage battery grid comprising the steps of: (a) providing a grid mold having a mold substrate consisting essentially of aluminum and defining a grid mold cavity comprising a shallow lattice of thin grid-strut mold voids having dimensions larger than those of the grid to be cast therein; (b) hard surface anodizing at least a portion of said mold substrate to produce an insulating molding surface thereon and to reduce the dimensions of said grid mold cavity to the desired grid dimensions to be cast therein; (c) successively performing the following steps to form the desired number of said battery grids thereon; (i) introducing molten lead alloy into said grid mold cavity against said insulating molding surface, said molding surface allowing said molten lead alloy to flow into and fill all of the interstices of said mold; (ii) allowing said lead alloy to cool to form said storage battery grid lattice; and (iii) removing said grid from said mold to produce a dimensionally uniform storage battery grid comprising a lattice of thin lead struts.
Claim 4
Independent Claim
178 words
A method of producing a storage battery grid comprising the steps of: (a) providing a grid mold having a mold substrate consisting essentially of aluminum and defining a grid mold cavity comprising a shallow lattice of thin grid-strut mold voids having dimensions larger than those of the grid to be cast therein; (b) hard surface anodizing at least a portion of said mold substrate to produce an insulating molding surface thereon and to reduce the dimensions of said grid mold cavity to the desired grid dimensions to be cast therein; (c) successively performing the following steps to form the desired number of said battery grids thereon; (i) introducing molten lead alloy into said grid mold cavity against said insulating molding surface, said molding surface allowing said molten lead alloy to flow into and fill all of the interstices of said mold; (ii) allowing said lead alloy to cool to form said storage battery grid lattice; and (iii) removing said grid from said mold to produce a dimensionally uniform storage battery grid comprising a lattice of thin lead struts.
Claim 5
Dependent Claim
52 words
The method of claim 2 comprising the additional step of texturing said mold substrate prior to said hard surface anodizing step to subsequently form a textured molding surface thereon for producing a texture on said grid to positively engage lead oxide battery paste upon subsequent application of said paste to said grid.
Claim 6
Dependent Claim
18 words
The method of claim 3 wherein said texturing step comprises the step of peening said substrate with shot.
Claim 7
Dependent Claim
20 words
The invention of claim 3 wherein said texturing step further comprises the step of blasting said substrate with glass beads.
Claim 8
Dependent Claim
19 words
The method of claim 3 wherein said texturing step further comprises the step of blasting said substrate with sand.
Claim 9
Dependent Claim
29 words
The method of claim 2 wherein said hard surface anodizing step produces a molding surface providing an added thickness to said substrate of between 0.00001 inches and 0.00500 inches.
Claim 10
Dependent Claim
28 words
The method of claim 7 wherein said hard surface anodizing step produces a molding surface providing an added thickness to said substrate of between 0.0020 and 0.0030 inches.
Claim 11
Dependent Claim
25 words
The method of claim 2 wherein said step of allowing said lead alloy to cool further comprises the step of simultaneously cooling said mold substrate.
References Cited (Backward Citations)
US2759231A
Cited
US3879009A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-04-24 | 1981-10-24 | 1982-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-24 | 1985-10-24 | 1986-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-24 | 1989-10-24 | 1990-04-25 | $7700.00 | Window Closed / Lapsed |