Patent US3618831A successfully refreshed from Google Patents.
US3618831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Casting machines for casting battery plate grids
Assignee: Chloride Overseas Ltd
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Filing: 1969-06-20
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Granted: 1971-11-09
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Expires: 1989-06-20
Abstract
Abstract For supplying molten lead to a battery plate grid casting machine, a lead pump, immersed in molten lead in a lead pot, is formed as a readily removable cartridge incorporating all the working parts of the pump, which is simply screwed into a fixed body incorporating the delivery pipe.
Inventors
- 👤 Alan John Goodwin
- 👤 Norman Shanks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:53
CPC Classifications
B; B23; B23D; B23D31/00; B23D31/04; B22; B22D; B22D25/00; B22D25/02; B22D25/04; B22D31/00; B22D39/00; H; H01; H01M; H01M4/00; H01M4/02; H01M4/64; H01M4/70; H01M4/72; H01M4/73; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y10; Y10S; Y10S83/00; Y10S83/903; Y10T; Y10T29/00; Y10T29/49; Y10T29/4998; Y10T29/49988; Y10T29/49989; Y10T83/00; Y10T83/566; Y10T83/5815; Y10T83/5842; Y10T83/5851; Y10T83/647; Y10T83/6572; Y10T83/6574; Y10T83/748; Y10T83/7593; Y10T83/7633
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
173 words
Apparatus for supplying molten lead to a machine for casting battery plate grids including a lead pump asseMbly immersed in a lead pot, said pump assembly including a body having a substantially horizontal top plate and a pair of interconnected limb members extending downwardly therefrom, one of said limb members having a hollow discharge passage and extending upwardly through said plate, said pump assembly further including a selfcontained piston and cylinder unit extending between said plate and the lower end of said one limb member in operative communication therewith, said cylinder having inlet ports in its cylinder wall through which molten lead may be drawn in by means of said piston from that surrounding it in the pot and thereafter deliver it through said discharge passage, said piston and cylinder unit being threadedly secured to said plate and having means extending upwardly from said plate for threadedly disengaging said piston and cylinder unit therefrom whereby said unit may be removed without emptying the molten lead from the pot or disconnecting said discharge passage.
Claim 2
Dependent Claim
173 words
Apparatus for supplying molten lead to a machine for casting battery plate grids including a lead pump asseMbly immersed in a lead pot, said pump assembly including a body having a substantially horizontal top plate and a pair of interconnected limb members extending downwardly therefrom, one of said limb members having a hollow discharge passage and extending upwardly through said plate, said pump assembly further including a selfcontained piston and cylinder unit extending between said plate and the lower end of said one limb member in operative communication therewith, said cylinder having inlet ports in its cylinder wall through which molten lead may be drawn in by means of said piston from that surrounding it in the pot and thereafter deliver it through said discharge passage, said piston and cylinder unit being threadedly secured to said plate and having means extending upwardly from said plate for threadedly disengaging said piston and cylinder unit therefrom whereby said unit may be removed without emptying the molten lead from the pot or disconnecting said discharge passage.
Claim 3
Dependent Claim
36 words
Apparatus according to claim 1 wherein said cylinder is threadedly secured to said plate, the upper portion of said cylinder extending upwardly from said plate to permit said cylinder to be threadedly disengaged from said plate.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |