US3768210A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic sandblast machine
Assignee: Individual
•
Filing: 1972-06-23
•
Granted: 1973-10-30
•
Expires: 1992-06-23
Abstract
Abstract An air driven sandblast machine comprising a storage means for the sand, a storage pot with an automatic filling device which operates to fill the storage means on the stopping of the machine and a selective air driven shaker system which may be alternatively usable in slurry blasting. The device further includes a muffler system to reduce noise. The invention described herein may be manufactured and used by or for the Government of the United States of America for governmental purposes without the payment of any royalties thereon or therefor.
Inventors
- 👤 C Johnson
- 👤 M Duncan
- 👤 L Sannes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:51
CPC Classifications
B; B24; B24C; B24C7/00; B24C7/0046
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
107 words
An automatic sandblast machine comprising in combination: a. a means for replenishing the sand; b. a means for storing said sand; c. an automatic sand filling means located between said sand replenishing means and said sand storing means; d. a means for activating and deactivating said sandblast machine; e. a vibration means for supplying said sand to a sand applying means; and f. said activating and deactivating means being operatively connected to said filling means and said vibration means by a controlling means wherein said sand filling means is activated to fill said storing means from said replenishing means when said activating and deactivating means is deactivated.
Claim 2
Dependent Claim
107 words
An automatic sandblast machine comprising in combination: a. a means for replenishing the sand; b. a means for storing said sand; c. an automatic sand filling means located between said sand replenishing means and said sand storing means; d. a means for activating and deactivating said sandblast machine; e. a vibration means for supplying said sand to a sand applying means; and f. said activating and deactivating means being operatively connected to said filling means and said vibration means by a controlling means wherein said sand filling means is activated to fill said storing means from said replenishing means when said activating and deactivating means is deactivated.
Claim 3
Dependent Claim
31 words
The device recited in claim 1 wherein said activating and deactivating means is a pneumatic activating and deactivating means which simultaneously activates and deactivates said filling means and said vibration means.
Claim 4
Dependent Claim
71 words
The device recited in claim 1 wherein said sand filling means is a pressure actuated valve with a valve sealing means, said filling means being located between said replenishing means and a sand storing means wherein said valve seals against said sealing means when said activating and deactivating means is actuated to close off the flow of the sand from said replenishing means simultaneously with the activation of said vibration means.
Claim 5
Dependent Claim
67 words
The device recited in claim 3 wherein said activating and deactivating means further comprises a pneumatic outlet valve and an air supply means located in said storing means and in operative contact with said actuated valve wherein said activating and deactivating means supply pneumatic pressure to said outlet valve through an air supply means to close said actuated valve when said activating and deactivating meanS is actuated.
Claim 6
Dependent Claim
26 words
The device recited in claim 4 wherein said actuated valve is positioned to return to the open position when said activating and deactivating means is deactivated.
Claim 7
Dependent Claim
52 words
The device recited in claim 5 wherein said actuated valve comprises a sealing unit and a dome-shaped valve, said dome-shaped valve being positioned so that said valve is in the open position when the sandblast machine is not pressurized and said valve is in the closed position when said machine is pressurized.
Claim 8
Dependent Claim
43 words
The device recited in claim 3 wherein said vibration means is a shaker device comprising a housing and a ball vibrator mechanism located in said housing, said housing further including a pressure means to activate said vibration means simultaneously with said activating valve.
Claim 9
Dependent Claim
40 words
The device recited in claim 7 wherein said housing further includes an air inlet and an air outlet located on either side and attached to said ball vibrator mechanism wherein the air from said air inlet activates said vibrator mechanism.
Claim 10
Dependent Claim
81 words
The device recited in claim 8 wherein the sand flow flowing around said ball vibrator mechanism is metered by the amount of air flow within said air inlet and the amount of flow of air within said air outlet, said air flow propelling a ball within said ball vibrator mechanism, said ball disturbing the air flow within said ball vibrator mechanism causing said ball vibrator mechanism to vibrate the flow of sand over the exterior of said vibrator within said housing.
Claim 11
Dependent Claim
40 words
The device recited in claim 3 wherein said sand storing means further includes a muffling means connected between said activating and deactivating means and said vibrating means by an air conducting means to reduce the noise of the air flow.
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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) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |