US3876156A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for the jet-pulverisation of fine grained and powdered solids
Assignee: Bayer AG
•
Filing: 1972-05-25
•
Granted: 1975-04-08
•
Expires: 1992-05-25
Abstract
Abstract Fine-grained and powdered solids are jet-pulverised in a propellent-gas pipe by accelerating the particles within the jet by an at least substantially linear drop in pressure inside and along a jet tube and decelerating the mixture of propellent gas and solids on leaving the jet tube with an at least substantially linear increase in pressure and reducing the particles in size by impact.
Inventors
- 👤 Edgar Muschelknautz
- 👤 Norbert Rink
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:24
CPC Classifications
B; B02; B02C; B02C19/00; B02C19/06; B02C19/066; B02C19/065; B02C23/00; B02C23/06; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49428; Y10T29/49432
Claims Analysis
Total Claims: 36
Claim 1
Independent Claim
82 words
A METHOD OF PULVERIZING MATERIAL WHEREIN A GAS STREAM IN WHICH THE MATERIAL IS DISPERSED IS PASSED THROUGH A JET TUBE FOR ACCELERATION OF THE GAS STREAM AND IS THEREAFTER CONVEYED THROUGH A DIFFUSOR FOR DECELERATION OF THE GAS STREAM AND PULVERIZATION IS EFFECTED BETWEEN THE JET TUBE AND THE DIFFUSOR BY IMPACTION OF THE MATERIAL, CHARACTERIZED IN THAT THE ACCELERATION IS ACCOMPANIED BY A SUBSTANTIALLY LINEAR DROP IN PRESSURE AND SAID DECELERATION IS ACCOMPANIED BY A SUBSTANTIALLY LINEAR INCREASE IN PRESSURE.
Claim 2
Independent Claim
82 words
A METHOD OF PULVERIZING MATERIAL WHEREIN A GAS STREAM IN WHICH THE MATERIAL IS DISPERSED IS PASSED THROUGH A JET TUBE FOR ACCELERATION OF THE GAS STREAM AND IS THEREAFTER CONVEYED THROUGH A DIFFUSOR FOR DECELERATION OF THE GAS STREAM AND PULVERIZATION IS EFFECTED BETWEEN THE JET TUBE AND THE DIFFUSOR BY IMPACTION OF THE MATERIAL, CHARACTERIZED IN THAT THE ACCELERATION IS ACCOMPANIED BY A SUBSTANTIALLY LINEAR DROP IN PRESSURE AND SAID DECELERATION IS ACCOMPANIED BY A SUBSTANTIALLY LINEAR INCREASE IN PRESSURE.
Claim 3
Dependent Claim
16 words
Method of claim 1, wherein the propellant gas stream is under a pressure of 2-100 atm.
Claim 4
Dependent Claim
16 words
Method of claim 1, wherein the propellant gas stream is under a pressure of 8-30 atm.
Claim 5
Dependent Claim
16 words
Method of claim 1, wherein the propellant gas stream is under a pressure of 2-30 atm.
Claim 6
Dependent Claim
30 words
Method according to claim 1, wherein the diffusor is disposed symetrically and perpendicularly with respect to the jet tube and said stream strikes the wall of the diffusor for impact.
Claim 7
Dependent Claim
34 words
Method according to claim 1, wherein two opposed gas streams, are directed coaxially against each other from opposed jet tubes into a common diffusor disposed symetrically and perpendicularly with respect to the jet tubes.
Claim 8
Dependent Claim
19 words
Method of claim 1, wherein the gas stream comprises air, superheated steam, vapours of organic substances, or light gases.
Claim 9
Dependent Claim
15 words
Method of claim 1, wherein the gas stream comprises methylene chloride, chlorobenzene, or dimethyl formamide.
Claim 10
Dependent Claim
12 words
Method of claim 1, wherein the gas stream comprises hydrogen or helium.
Claim 11
Dependent Claim
15 words
Method according to claim 1, wherein the diffusor is disposed perpendicular to the jet tube.
Claim 12
Independent Claim
171 words
An apparatus for jet pulverization by impact of fine grained and powdered solids comprising: a. a jet tube comprising a tapered section having an inlet end of relatively large cross-sectional area and an outlet end of relatively small cross-sectional area, a widening section having an inlet end of relatively small cross-sectional area in communication with the outlet end of the tapered section for receiving material discharged from the outlet end of the tapered section, and an outlet end of relatively large cross-sectional area, for conveyance of a propellent gas laden with said solids, b. a diffusor in communication with the outlet end of the widening section of the jet tube for receiving solid-laden propellent gas from the jet tube and the diffusion thereof, c. means for causing impaction of the solids for the pulverization thereof between the jet tube and the diffusor, d. the jet tube and the diffusor being adapted to subject the gas passing through them to a substantially linear pressure drop and a substantially linear pressure increase, respectively.
Claim 13
Independent Claim
171 words
An apparatus for jet pulverization by impact of fine grained and powdered solids comprising: a. a jet tube comprising a tapered section having an inlet end of relatively large cross-sectional area and an outlet end of relatively small cross-sectional area, a widening section having an inlet end of relatively small cross-sectional area in communication with the outlet end of the tapered section for receiving material discharged from the outlet end of the tapered section, and an outlet end of relatively large cross-sectional area, for conveyance of a propellent gas laden with said solids, b. a diffusor in communication with the outlet end of the widening section of the jet tube for receiving solid-laden propellent gas from the jet tube and the diffusion thereof, c. means for causing impaction of the solids for the pulverization thereof between the jet tube and the diffusor, d. the jet tube and the diffusor being adapted to subject the gas passing through them to a substantially linear pressure drop and a substantially linear pressure increase, respectively.
Claim 14
Dependent Claim
30 words
An apparatus according to claim 11, the diffusor being disposed for conveying the solid-laden propellent gas radially outward from the outlet end of the widening section of the jet tube.
Claim 15
Dependent Claim
21 words
Apparatus according to claim 12, and an impact surface disposed at the outlet into the diffusor for impaction of the solids.
Claim 16
Dependent Claim
17 words
An apparatus according to claim 11, the length of the jet tube being 0.3 to 3.0 meters.
Claim 17
Dependent Claim
15 words
Apparatus according to claim 11, wherein the diffusor is disposed perpendicular to the jet tube.
Claim 18
Dependent Claim
59 words
An apparatus according to claim 11, wherein the jet tube outlet into the diffusor is arranged opposite an impact surface, the jet tube comprising a cylindrical sleeve in which removable inserts are arranged to form an acceleration duct which tapers conically from the gas receiving end to a cylindrical section, and widens from the cylindrical section towards the outlet.
Claim 19
Dependent Claim
15 words
An apparatus according to claim 16, wherein the widening of the acceleration duct is continuous.
Claim 20
Dependent Claim
13 words
An apparatus according to claim 16, wherein the acceleration duct widens in stages.
Claim 21
Dependent Claim
63 words
An apparatus according to claim 11, wherein the jet tube outlet into the diffusor is arranged opposite an impact surface, the jet tube being of rectangular cross section and having at least two opposite walls which consist of a wear-resistant elastic material, the elastic material being adapted to be adjusted in sections towards the middle of the duct to form an acceleration duct.
Claim 22
Dependent Claim
17 words
An apparatus according to claim 11, wherein the diffusor is in the form of a plate diffusor.
Claim 23
Dependent Claim
31 words
An apparatus according to claim 11, wherein the diffusor comprises at least two tubular diffusor sections which are arranged symetrically and perpendicularly with respect to the axis of the jet tube.
Claim 24
Dependent Claim
17 words
An apparatus according to claim 21, wherein the tubular diffusor sections have a rectangular internal cross section.
Claim 25
Dependent Claim
25 words
An apparatus according to claim 11, wherein an impact chamber with gas inlets and outlets is arranged opposite the outlet opening of the jet tube.
Claim 26
Dependent Claim
28 words
An apparatus according to claim 11, wherein two jet tubes are arranged coaxially and directed towards one another for introduction of solid laden propellant gas into the diffusor.
Claim 27
Dependent Claim
16 words
Apparatus according to claim 11, the jet tube being composed of a number of removable inserts.
Claim 28
Dependent Claim
15 words
Apparatus according to claim 25, the diffusor being composed of a number of removable inserts.
Claim 29
Dependent Claim
15 words
Apparatus according to claim 11, the diffusor being composed of a number of removable inserts.
Claim 30
Dependent Claim
26 words
Apparatus according to claim 11, the jet tube cross-section being adjustable so as to permit adjustment of the cross-section to provide said substantially linear pressure drop
Claim 31
Dependent Claim
12 words
Apparatus according to claim 28, the jet tube being of rectangular cross-section.
Claim 32
Dependent Claim
45 words
An apparatus according to claim 11, the jet tube and the diffusor being adapted to subject the gas passing through them to a substantially linear pressure drop and a substantially linear pressure increase, respectively, at a propellant gas pressure of about 2 to 100 atms.
Claim 33
Dependent Claim
45 words
An apparatus according to claim 11, the jet tube and the diffusor being adapted to subject the gas passing through them to a substantially linear pressure drop and a substantially linear pressure increase, respectively at a propellant gas pressure of about 8 to 30 atms.
Claim 34
Dependent Claim
45 words
An apparatus according to claim 11, the jet tube and the diffusor being adapted to subject the gas passing through them to a substantially linear pressure drop and a substantially linear pressure increase, respectively, at a propellant gas pressure of about 2 to 30 atms.
Claim 35
Independent Claim
82 words
A method of pulverizing material wherein a gas stream in which the material is dispersed is passed through a jet tube for acceleration of the gas stream and is thereafter conveyed through a diffusor for deceleration of the gas stream and pulverization is effected by impaction of the material after acceleration thereof in the jet tube characterized in that the acceleration is accompanied by a sybstantially linear drop in pressure and said deceleration is accompanied by a substantially linear increase in pressure.
Claim 36
Independent Claim
82 words
A method of pulverizing material wherein a gas stream in which the material is dispersed is passed through a jet tube for acceleration of the gas stream and is thereafter conveyed through a diffusor for deceleration of the gas stream and pulverization is effected by impaction of the material after acceleration thereof in the jet tube characterized in that the acceleration is accompanied by a sybstantially linear drop in pressure and said deceleration is accompanied by a substantially linear increase in pressure.
References Cited (Backward Citations)
US2560807A
Cited
US238044A
Cited
US2704555A
Cited
US1847009A
Cited
US2032827A
Cited
US2332407A
Cited
US2494153A
Cited
US2768938A
Cited
US2832545A
Cited
US3523350A
Cited
US3482786A
Cited
US3352498A
Cited
US3643875A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |