US3580422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for adding finely divided solid material to a mixture
Assignee: Hartley Controls Corp
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Filing: 1968-11-25
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Granted: 1971-05-25
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Expires: 1988-11-25
Abstract
Abstract This disclosure relates to apparatus for adding both a liquid and a finely divided solid to a mixture and in which the quantity of finely divided solid that is added is measured in direct proportion to the liquid deficiency of the mixture and in which the mechanism for measuring out the addition of finely divided solid is directly responsive to a liquid deficiency sensing mechanism which operates a reversible motor. The motor turns a shaft which controls both the liquid deficiency make-up mechanism and the finely divided solid make-up mechanism. The device is particularly adapted for bond compensation in a foundry where the mixture is foundry sand, water, and bond.
Inventors
- 👤 Nelson Hartley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:08
CPC Classifications
B; B22; B22C; B22C5/00; B22C5/04; B22C5/0409; B22C5/0472; B01; B01F; B01F35/00; B01F35/80; B01F35/82; B01F23/00; B01F23/50; B01F23/565
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
102 words
In apparatus to add from separate sources both a liquid and a finely divided solid to a mixture deficient in liquid and finely divided solid, said apparatus including a liquid deficiency sensing means and responding means responsive to the sensing means to control the addition of a quantity of liquid to the mixture from one source in accordance with the liquid deficiency, the improvement for adding the finely divided solid to the mixture from another source and comprising means controlled by said responding means for adding from said other source a quantity of finely divided solid in proportion to the added liquid.
Claim 2
Dependent Claim
102 words
In apparatus to add from separate sources both a liquid and a finely divided solid to a mixture deficient in liquid and finely divided solid, said apparatus including a liquid deficiency sensing means and responding means responsive to the sensing means to control the addition of a quantity of liquid to the mixture from one source in accordance with the liquid deficiency, the improvement for adding the finely divided solid to the mixture from another source and comprising means controlled by said responding means for adding from said other source a quantity of finely divided solid in proportion to the added liquid.
Claim 3
Dependent Claim
35 words
The improvement of claim 1 in which said responding means comprises a motor and a liquid valve subject to said motor, the means for adding the finely divided solid being also subject to said motor.
Claim 4
Dependent Claim
36 words
The improvement of claim 2 in which both said liquid valve and said means for adding the finely divided solid have pneumatic operators, said motor being coupled to variable air pressure regulators for the pneumatic operators.
Claim 5
Dependent Claim
26 words
The improvement of claim 3 in which said motor is reversible, said motor having a shaft by which it is coupled to said air pressure regulators.
Claim 6
Dependent Claim
70 words
The improvement of claim 3 in which the means for adding the finely divided solid comprises a weigh hopper, means for charging finely divided solid into said hopper when it is underweight and for cutting off said charge when the hopper reaches proper weight, means for discharging hopper contents into said mixture and balance shifting means actuated by one of said pneumatic operators for changing the amount of said charge.
Claim 7
Dependent Claim
49 words
The improvement of claim 5 in which said balance shifting means comprises a balance arm by which the weigh hopper is supported, said one of sad pneumatic operators being connected to said arm at a point offset from its center of balance for shifting the balance of said arm.
Claim 8
Dependent Claim
37 words
The improvement of claim 6 in which the means for charging the finely divided solid iNto the hopper comprises a valve, and control means for said valve including a switch actuated by pivotal movement of said arm.
Claim 9
Dependent Claim
54 words
The improvement of claim 1 in combination with a hopper into which said finely divided solid is charged, a mixer containing said mixture and into which finely divided solid in said hopper is discharged, and means for interlocking the mixer against operation until said hopper has been fully charged with said finely divided solid.
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) | 1974-05-24 | 1974-11-23 | 1975-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-24 | 1978-11-23 | 1979-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-24 | 1982-11-23 | 1983-05-25 | $7700.00 | Window Closed / Lapsed |