US3742650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system for the circulatory system of a shot blasting apparatus
Assignee: Badische Maschinenfabrik GmbH
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Filing: 1971-07-29
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Granted: 1973-07-03
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Expires: 1991-07-29
Abstract
Abstract A blasting apparatus for recuperating and cleaning shot which includes a circulatory system for the shot, in which the contaminated shot traverses one or several cleaning installations whereby the cleaned shot is fed to centrifuging wheels while inadequately cleaned shot is caused to traverse once again the cleaning installations; at least one measuring device is provided in the circulatory system for determining the degree of contamination of the shot whereby the measuring device is connected with a control device that so acts by way of an actuating element and a mechanical control element and thereby influences the circulatory system in such a manner that a predetermined degree of cleanliness of the shot is maintained at the inlet of the centrifuging wheels.
Inventors
- 👤 Fahland J Von
- 👤 M Graf
- 👤 H Roth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:53
CPC Classifications
B; B24; B24C; B24C9/00; B24C9/006; Y; Y02; Y02P; Y02P70/00; Y02P70/10
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
100 words
A blasting apparatus with a circulatory system for shot in which the contaminated shot traverses at least one cleaning means and in which the cleaned shot is fed to a blasting means, characterized in that at least one measuring means is provided in the circulatory system for determining the degree of contamination, said measuring means being operatively connected with a control means controlling the circulatory system by way of an actuating means and a mechanical control element in such a manner that at the inlet of the blasting means the shot does not fall below a predetermined degree of purity.
Claim 2
Dependent Claim
100 words
A blasting apparatus with a circulatory system for shot in which the contaminated shot traverses at least one cleaning means and in which the cleaned shot is fed to a blasting means, characterized in that at least one measuring means is provided in the circulatory system for determining the degree of contamination, said measuring means being operatively connected with a control means controlling the circulatory system by way of an actuating means and a mechanical control element in such a manner that at the inlet of the blasting means the shot does not fall below a predetermined degree of purity.
Claim 3
Dependent Claim
19 words
A blasting apparatus according to claim 1, characterized in that the blasting means is formed by centrifuging wheel means.
Claim 4
Dependent Claim
27 words
A blasting apparatus according to claim 1, characterized in that means are provided for feeding insufficiently cleaned shot back to the cleaning installation for renewed cleaning action.
Claim 5
Dependent Claim
96 words
A blasting apparatus according to claim 1, characterized in that the measuring means is arranged downstream of and close to the treating place of a workpiece and in that the results of the measuring means act by way of the control means on the actuating means and the mechanical control element which is in the form of a throttle means, in such a manner that the shot supplied to the blasting means is so adjusted that the quantity of shot plus sand blasted off from the workpiece does not exceed the capacity of the cleaning means.
Claim 6
Dependent Claim
96 words
A blasting apparatus according to claim 1, characterized in that a measuring means is arranged downstream of the cleaning means and upstream of the blasting means, the measuring results of said last-mentioned measuring means acting by way of the control means on the actuating means and mechanical control element which is in the form of a shifting valve means, in such a manner that sufficiently cleaned shot is fed to the blasting means and inadequately fed shot is fed back to the circulatory system for a renewed cleaning operation in by-passing relationship to the blasting means.
Claim 7
Dependent Claim
64 words
A blasting apparatus according to claim 1, characterized in that a measuring means which is arranged as near as possible to the treating location of a workpiece acts on the drive means of a conveyor mechanism by way of the control means in such a manner that the sand-shot quantity fed to the cleaning means does not exceed the capacity of the cleaning means.
Claim 8
Dependent Claim
55 words
A blasting apparatus according to claim 1, characterized in that the measuring means includes two induction coil means of which one is traversed by the shot mixture to be measured and the other is provided with a non-changing filling, the results of which are amplified and shaped into a control pulse in an amplifier means.
Claim 9
Dependent Claim
33 words
A blasting apparatus according to claim 7, characterized in that a heating means is provided for maintaining the two coil means at a predetermined temperature which corresponds approximately to the maximum shot temperature.
Claim 10
Dependent Claim
77 words
A blasting apparatus according to claim 8, characterized in that the induction coil means of the measuring means have each a length that is at least three times the inner diameter of a pipe means about which the two induction coil means are wound, said pipe means consisting of non-magnetic material with good heat insulation properties and a wall thickness of about one-third to one-fifth of the pipe diameter, and magnetic shield means about the coil means.
Claim 11
Dependent Claim
36 words
A blasting apparatus according to claim 9, characterized in that a heat insulation layer is arranged over the pipe means having the coil means wound thereon, the magnetic shield means being disposed about an outer heat-insulation.
Claim 12
Dependent Claim
57 words
A blasting apparatus according to claim 1, characterized in that the measuring means includes a source of radioactive rays and a ray-receiver means which are disposed on two sides of a line means conducting shot, the receiver means producing in its output the measurement result which is amplified and shaped into a pulse in an amplifier means.
Claim 13
Dependent Claim
40 words
A blasting apparatus according to claim 11, characterized in that the measuring means are arranged for determining the degree of contamination of the shot in a substantially vertically arranged line section which is followed downstream thereof by a throttle means.
Claim 14
Dependent Claim
37 words
A blasting apparatus according to claim 12, characterized in that a metering means is provided for feeding fresh shot from a supply container to the circulatory system approximately to the same extent as use and loss thereof.
Claim 15
Dependent Claim
96 words
A blasting apparatus according to claim 4, characterized in that a measuring means is arranged downstream of the cleaning means and upstream of the blasting means, the measuring results of said last-mentioned measuring means acting by way of the control means on the actuating means and mechanical control element which is in the form of a shifting valve means, in such a manner that sufficiently cleaned shot is fed to the blasting means and inadequately fed shot is fed back to the circulatory system for a renewed cleaning operation in by-passing relationship to the blasting means.
Claim 16
Dependent Claim
64 words
A blasting apparatus according to claim 14, characterized in that a measuring means which is arranged as near as possible to the treating location of a workpiece acts on the drive means of a conveyor mechanism by way of the control means in such a manner thaT the sand-shot quantity fed to the cleaning means does not exceed the capacity of the cleaning means.
Claim 17
Dependent Claim
56 words
A blasting apparatus according to claim 15, characterized in that the last-mentioned measuring means includes two induction coil means of which one is traversed by the shot mixture to be measured and the other is provided with a non-changing filling, the results of which are amplified and shaped into a control pulse in an amplifier means.
Claim 18
Dependent Claim
33 words
A blasting apparatus according to claim 16, characterized in that a heating means is provided for maintaining the two coil means at a predetermined temperature which corresponds approximately to the maximum shot temperature.
Claim 19
Dependent Claim
77 words
A blasting apparatus according to claim 17, characterized in that the induction coil means of the measuring means have each a length that is at least three times the inner diameter of a pipe means about which the two induction coil means are wound, said pipe means consisting of non-magnetic material with good heat insulation properties and a wall thickness of about one-third to one-fifth of the pipe diameter, and magnetic shield means about the coil means.
Claim 20
Dependent Claim
36 words
A blasting apparatus according to claim 18, characterized in that a heat insulation layer is arranged over the pipe means having the coil means wound thereon, the magnetic shield means being disposed about an outer heat-insulation.
Claim 21
Dependent Claim
57 words
A blasting apparatus according to claim 15, characterized in that the measuring means includes a source of radioactive rays and a ray-receiver means which are disposed on two sides of a line means conducting shot, the receiver means producing in its output the measurement result which is amplified and shaped into a pulse in an amplifier means.
Claim 22
Dependent Claim
40 words
A blasting apparatus according to claim 20, characterized in that the measuring means are arranged for determining the degree of contamination of the shot in a substantially vertically arranged line section which is followed downstream thereof by a throttle means.
Claim 23
Dependent Claim
37 words
A blasting apparatus according to claim 21, characterized in that a metering means is provided for feeding fresh shot from a supply container to the circulatory system approximately to the same extent as use and loss thereof.
Claim 24
Dependent Claim
19 words
A blasting apparatus according to claim 22, characterized in that the blasting means is formed by centrifuging wheel means.
Claim 25
Dependent Claim
40 words
A blasting apparatus according to claim 1, characterized in that the measuring means are arranged for determining the degree of contamination of the shot in a substantially vertically arranged line section which is followed downstream thereof by a throttle means.
Claim 26
Dependent Claim
37 words
A blasting apparatus according to claim 1, characterized in that a metering means is provided for feeding fresh shot from a supply container to the circulatory system approximately to the same extent as use and loss thereof.
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) | 1976-07-02 | 1977-01-01 | 1977-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-02 | 1981-01-01 | 1981-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-02 | 1985-01-01 | 1985-07-03 | $7700.00 | Window Closed / Lapsed |