US3613770A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foundry sand article forming machine with pivotal blow reservoir
Assignee: Sherwin Williams Co
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Filing: 1970-02-12
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Granted: 1971-10-19
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Expires: 1990-02-12
Abstract
Abstract A machine for the production of foundry sand articles including a first piston-cylinder assembly for forming a box, a second such assembly for filling a reservoir with molding sand and clamping such reservoir laterally against such box for the sand to be blown therein, the first assembly disassembling such box and stripping the sand article therein onto a discharge conveyor after the second assembly has withdrawn the reservoir for filling, the first assembly also indexing the conveyor.
Inventors
- 👤 Gilbert J Janke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:17
CPC Classifications
B; B22; B22C; B22C11/00; B22C15/00; B22C15/23; B22C15/24
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
74 words
A machine for producing foundry sand articles comprising means to clamp box halves together to form a mold box, a blow reservoir operative to blow sand generally horizontally into such assembled halves, a butterfly valve at the top of said reservoir, means responsive to the shifting of said reservoir to open said valve for filling of the reservoir, generally horizontal pivot means for said reservoir, and a piston-cylinder assembly operative to pivot said reservoir.
Claim 2
Dependent Claim
74 words
A machine for producing foundry sand articles comprising means to clamp box halves together to form a mold box, a blow reservoir operative to blow sand generally horizontally into such assembled halves, a butterfly valve at the top of said reservoir, means responsive to the shifting of said reservoir to open said valve for filling of the reservoir, generally horizontal pivot means for said reservoir, and a piston-cylinder assembly operative to pivot said reservoir.
Claim 3
Dependent Claim
40 words
A machine as set forth in claim 1 including a valve stem for said butterfly valve, and linkage means interconnecting said valve stem and a fixed pivot operative thus to open and close said butterfly valve as said reservoir shifts.
Claim 4
Dependent Claim
23 words
A machine as set forth in claim 2 including an eccentric pivot in said linkage to obtain adjustment of the effective length thereof.
Claim 5
Dependent Claim
69 words
A machine as set forth in claim 1 wherein said reservoir includes a horizontally directed blow plate adapted to be laterally clamped against the side of the clamped box halves when said reservoir is shifted. 5. A machine as set forth in claim 1 wherein said blow reservoir includes an upper cylindrical portion having a blow valve therein, and a removable lower elbow portion having an exhaust valve therein.
Claim 6
Dependent Claim
16 words
A machine as set forth in claim 5 including coolant means for said lower elbow portion.
Claim 7
Dependent Claim
72 words
A machine as set forth in claim 1 wherein said reservoir includes a top sand hopper flaring in the plane of shifting thereof to encompass the bottom of a sand chute regardless of the shifted position. 8 A machine as set forth in claim 1 including a fixed sand chute, a chop gate for said chute, and means responsive to the shifting of said reservoir to open and close said chop gate.
Claim 8
Dependent Claim
75 words
A machine for producing foundry sand articles comprising a head for supporting a first box half, a vertically movable cradle for supporting a second cooperating box half, a sand blow reservoir for blowing sand generally horizontally into such box halves when assembled, means to index said reservoir toward and away from such assembled box halves, generally horizontal pivot means for said reservoir, and piston-cylinder means operative to pivot said reservoir thus to index the same.
Claim 9
Dependent Claim
75 words
A machine for producing foundry sand articles comprising a head for supporting a first box half, a vertically movable cradle for supporting a second cooperating box half, a sand blow reservoir for blowing sand generally horizontally into such box halves when assembled, means to index said reservoir toward and away from such assembled box halves, generally horizontal pivot means for said reservoir, and piston-cylinder means operative to pivot said reservoir thus to index the same.
Claim 10
Dependent Claim
31 words
A machine as set forth in claim 9 wherein said blow reservoir includes an upper generally cylindrical portion and a lower elbow portion terminating in a generally horizontally directed blow plate.
Claim 11
Dependent Claim
14 words
A machine as set forth in claim 10 wherein said elbow portion flares horizontally.
Claim 12
Dependent Claim
16 words
A machine as set forth in claim 11 including exhaust valve means on said elbow portion.
Claim 13
Dependent Claim
17 words
A machine as set forth in claim 12 including a blow valve in said upper cylindrical portion.
Claim 14
Dependent Claim
39 words
A machine as set forth in claim 13 including a butterfly valve on the top of said upper cylindrical portion, and means responsive to the indexing of said reservoir toward such assembled box halves to close said butterfly valve.
Claim 15
Dependent Claim
32 words
A machine as set forth in claim 14 wherein said means responsive to the indexing of said reservoir comprises a pair of links connected to the valve stem of said butterfly valve.
Claim 16
Dependent Claim
34 words
A machine as set forth in claim 15 including a sand chute, a chop gate for said chute, and means responsive to the indexing of said reservoir to open an close said chop gate.
Claim 17
Dependent Claim
93 words
A machine for the production of foundry sand articles including a frame, a head on said frame for supporting a first box half, a vertically movable cradle for supporting a second cooperating box half, a sand reservoir mounted on a generally horizontal pivot means for blowing sand generally horizontally within such assembled box halves, and a pair of vertically oriented piston-cylinder assemblies on said frame, one for vertically moving said cradle for assembling and disassembling such box halves, and the other for indexing said reservoir to and from communication with such box halves.
Claim 18
Dependent Claim
93 words
A machine for the production of foundry sand articles including a frame, a head on said frame for supporting a first box half, a vertically movable cradle for supporting a second cooperating box half, a sand reservoir mounted on a generally horizontal pivot means for blowing sand generally horizontally within such assembled box halves, and a pair of vertically oriented piston-cylinder assemblies on said frame, one for vertically moving said cradle for assembling and disassembling such box halves, and the other for indexing said reservoir to and from communication with such box halves.
Claim 19
Dependent Claim
55 words
A machine as set forth in claim 17 including a vertically extending guide at one side of said machine for guiding said cradle assembly, an intermediately pivoted lever, one end of said lever supporting said cradle assembly for movement along said guide, the opposite end being connected to the rod of said one piston-cylinder assembly.
Claim 20
Dependent Claim
34 words
A machine as set forth in claim 18 wherein said one end of said lever is provided with slotted laterally spaced arms, said cradle assembly being supported in the slotted portion of said arms.
Claim 21
Dependent Claim
25 words
A machine as set forth in claim 18 including cooperating means on said guide and cradle operative to roll said cradle about a horizontal axis.
Claim 22
Dependent Claim
30 words
A machine as set forth in claim 17 including a take-away conveyor, and means responsive to the rocking of said lever in one direction only unidirectionally to index said conveyor.
Claim 23
Dependent Claim
21 words
A machine as set forth in claim 21 including a pivoted dog on said lever operative to obtain such conveyor movement.
Claim 24
Dependent Claim
21 words
A machine as set forth in claim 17 wherein said reservoir is pivotally mounted, said other piston-cylinder assembly pivoting said reservoir.
Claim 25
Dependent Claim
47 words
A machine as set forTh in claim 23 wherein said reservoir is in the form of an L with the blow path thereof being vertically disposed at the bottom, said other piston-cylinder assembly extending to press the blow plate against the side of the assembled box halves.
Claim 26
Dependent Claim
33 words
A machine as set forth in claim 24 including a fill valve at the top of said reservoir, and linkage means to open said valve in response to pivoting retraction of said reservoir.
Claim 27
Dependent Claim
52 words
A machine as set forth in claim 25 wherein said fill valve is a butterfly valve having a rotatable valve stem, and said linkage means includes two interconnected links, the opposite end of one being secured to said stem while the opposite end of the other is pivoted to the machine frame.
Claim 28
Dependent Claim
23 words
A machine as set forth in claim 26 including an eccentric pin for said last mentioned pivot to obtain adjustment of said linkage.
Claim 29
Dependent Claim
41 words
A machine as set forth in claim 24 including a sand chute with a pivotally mounted chop gate thereunder, and link means interconnecting said reservoir and said chop gate to open the latter in response to pivoting retraction of said reservoir.
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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) | 1974-10-18 | 1975-04-19 | 1975-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-18 | 1979-04-19 | 1979-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-18 | 1983-04-19 | 1983-10-19 | $7700.00 | Window Closed / Lapsed |