Patent US3793785A successfully refreshed from Google Patents.
US3793785A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Particle blasting
Assignee: BOLAN RICHARD
•
Filing: 1973-01-15
•
Granted: 1974-02-26
•
Expires: 1993-01-15
Abstract
Abstract Blasting system for particles, e.g., air blast of fine abrasive particles, having an non-clogging feed device and a reliable, long-lasting on-off valve system acting upon a resilient hose. The feed device features: hourglass type particle metering into an air stream; countercurrent air percolation from air conduit through the particle metering orifice; and air turbulence at the orifice in a constant diameter region of the conduit. The valve member features: a ball member pressed against a resilient passage toward a pair of opposing ball members; adjustment devices for adjusting initial depression of each of the pair of ball members into the hose; air pressure actuation of the one ball member; and actuation increasing the depression of each of the pair of ball members to urge the respective resilient wall portion into conformity with the opposite wall of the conduit and reverse depression effect at the central ball member, cooperating to choke off the flow. A removable metering member defining the hourglass configuration orifice and transverse air passage permits replacement of the most active, hence wear-exposed, portion of the system.
Inventors
- 👤 F Austin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:27
CPC Classifications
B; B24; B24C; B24C3/00; B24C7/00; B24C7/0046; B24C7/0069
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
105 words
A blasting system including a conduit for air from a pressurized source, a supply chamber for particles and a device For introducing the particles to the air as it flows in said conduit wherein said chamber has an outlet in its bottom communicating with said conduit through a restricted orifice for gravity feed of said particles to said air, said chamber being otherwise effectively closed, and the orifice and conduit constructed and arranged so that air passes through said orifice from said conduit into said chamber in response to, and to replace, particles moving oppositely from said chamber through said orifice into said air flow.
Claim 2
Dependent Claim
105 words
A blasting system including a conduit for air from a pressurized source, a supply chamber for particles and a device For introducing the particles to the air as it flows in said conduit wherein said chamber has an outlet in its bottom communicating with said conduit through a restricted orifice for gravity feed of said particles to said air, said chamber being otherwise effectively closed, and the orifice and conduit constructed and arranged so that air passes through said orifice from said conduit into said chamber in response to, and to replace, particles moving oppositely from said chamber through said orifice into said air flow.
Claim 3
Dependent Claim
41 words
The system of claim 1 including a second chamber below said conduit in the region of said orifice of said supply chamber, said second chamber having an orifice positioned in the immediate vicinity of said first orifice to receive excess abrasive.
Claim 4
Dependent Claim
47 words
The system of claim 2 in which said first orifice is positioned to discharge from said supply chamber directly downwardly into said air conduit and said second orifice is in substantial vertical alignment with said first orifice and extends from said conduit downwardly to said second chamber.
Claim 5
Dependent Claim
18 words
The system of claim 1 wherein said orifice is smaller in diameter than the diameter of said conduit.
Claim 6
Dependent Claim
28 words
The system of claim 4 wherein said orifice is a single hole of less than one-sixteenth inch diameter and the conduit is less than one-eighth inch in diameter.
Claim 7
Dependent Claim
52 words
The system of claim 1 wherein an integral member has a passage formed therethrough defining a section of said conduit and a hole formed perpendicular to said passage defining said orifice, said hole opening outwardly from said orifice defining a funnel surface for directing particles from said supply chamber to said orifice.
Claim 8
Dependent Claim
39 words
The system of claim 2 wherein said supply and secondary chambers combine to provide effectively an hourglass configuration and said air conduit extends through the neck portion of said hourglass configuration at an angle to the hourglass flow axis.
Claim 9
Dependent Claim
69 words
The system of claim 1 comprising a section of conduit downstream of said orifice comprised of resilient material and a shut-off device for the particles and air mixture comprising three ball members, a pair positioned on one side of said conduit and one positioned on the other side in opposition thereto and means for urging said one ball member relatively toward the other two thereby to choke said conduit.
Claim 10
Dependent Claim
19 words
The abrading system of claim 8 wherein said ball members are so urged together in response to air pressure.
Claim 11
Dependent Claim
120 words
A blasting system including a conduit for air from a pressurized source, a supply chamber for particles and a device for introducing the particles to the air as it flows in said conduit wherein said chamber has an outlet in its bottom communicating with said conduit through a restricted orifice for gravity feed of said particles to said air, a second chamber below said conduit in the region of said orifice of said supply chamber, said second chamber having an orifice positioned in the immediate vicinity of said orifice to receive excess particles, said chambers connected to provide an hourglass configuration, and said conduit extending through the neck of said hourglass configuration at an angle to the hourglass flow axis.
Claim 12
Dependent Claim
120 words
A blasting system including a conduit for air from a pressurized source, a supply chamber for particles and a device for introducing the particles to the air as it flows in said conduit wherein said chamber has an outlet in its bottom communicating with said conduit through a restricted orifice for gravity feed of said particles to said air, a second chamber below said conduit in the region of said orifice of said supply chamber, said second chamber having an orifice positioned in the immediate vicinity of said orifice to receive excess particles, said chambers connected to provide an hourglass configuration, and said conduit extending through the neck of said hourglass configuration at an angle to the hourglass flow axis.
Claim 13
Dependent Claim
24 words
The system of claim 10 wherein the orifices of each of said chambers are of identical cross section and vertically aligned with each other.
Claim 14
Dependent Claim
22 words
The system of claim 11 including means to invert said hourglass configuration to reuse the particles which fall into said second chamber.
Claim 15
Dependent Claim
21 words
The system of claim 10 wherein said conduit is of constant cross section through the neck portion of said hourglass configuration.
Claim 16
Dependent Claim
123 words
A blasting system including a conduit for air from a pressurized source, a supply chamber for fine particles and a device for introducing the particles to the air as it flows in said conduit, wherein said chamber has an outlet in its bottom communicating with said conduit through a restricted orifice for gravity feed of said particles to said air, a section of conduit downstream of said orifice comprisEd of resilient material and a shut-off device for the particles and air mixture comprising three ball members, a pair positioned on one side of said conduit and one positioned on the other side in opposition thereto and means for urging said one ball member relatively toward the other two whereby to choke said conduit.
Claim 17
Dependent Claim
123 words
A blasting system including a conduit for air from a pressurized source, a supply chamber for fine particles and a device for introducing the particles to the air as it flows in said conduit, wherein said chamber has an outlet in its bottom communicating with said conduit through a restricted orifice for gravity feed of said particles to said air, a section of conduit downstream of said orifice comprisEd of resilient material and a shut-off device for the particles and air mixture comprising three ball members, a pair positioned on one side of said conduit and one positioned on the other side in opposition thereto and means for urging said one ball member relatively toward the other two whereby to choke said conduit.
Claim 18
Dependent Claim
23 words
The system of claim 14 wherein said one ball member is of diameter greater than the spacing between said pair of ball members.
Claim 19
Dependent Claim
21 words
The system of claim 15 including adjustment means for adjusting each of said pair of ball members toward said resilient conduit.
Claim 20
Dependent Claim
23 words
The system of claim 15 wherein a pneumatic cylinder is associated with one ball member adapted to urge it against said resilient conduit.
Claim 21
Dependent Claim
54 words
A blasting system valve comprising a passage through which a resilient hose can extend, a pair of ball members on one side of said passage, one ball member on the other side of said passage and means for urging the one ball member toward said pair whereby to choke the flow through said passage.
Claim 22
Dependent Claim
54 words
A blasting system valve comprising a passage through which a resilient hose can extend, a pair of ball members on one side of said passage, one ball member on the other side of said passage and means for urging the one ball member toward said pair whereby to choke the flow through said passage.
Claim 23
Dependent Claim
21 words
The system of claim 18 wherein said ball members are constrained from translation but free to rotate about their respective centers.
Claim 24
Dependent Claim
27 words
The system of claim 18 wherein said pair of ball members are spaced from each other a distance less than the diameter of said one ball member.
Claim 25
Dependent Claim
65 words
The system of claim 18 wherein each of said pair of ball members is associated with an adjustment device for adjusting its depression into the wall of said hose and a pneumatic means for urging said one ball member toward said pair to increase said depression upon each of said pair of ball members while itself oppositely depressing said hose, cooperating to choke the flow.
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) | 1977-02-25 | 1977-08-27 | 1978-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-25 | 1981-08-27 | 1982-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-25 | 1985-08-27 | 1986-02-26 | $7700.00 | Window Closed / Lapsed |