US3138298A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Powder feed and metering device for flame spray guns
Assignee: Metco Inc
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Filing: 1961-07-19
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Granted: 1964-06-23
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Expires: 1981-07-19
Abstract
No abstract record available.
Inventors
- 👤 Walter A Siebein
- 👤 Anthony J Rotolico
- 👤 Greengrass Floyd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:25
CPC Classifications
B; B05; B05B; B05B7/00; B05B7/14; B05B7/1404; B05B7/144
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A POWDER FEED AND METERING DEVICE FOR A FLAME SPRAY GUN COMPRISING MEANS DEFINING A GRAVITY FLOW PASSAGE FOR POWDER, A CONTAINER FOR POWDER DETACHABLY MOUNTED ABOVE SAID GRAVITY FLOW PASSAGE AND HAVING A DISCHARGE OPENING IN COMMUNICATION WITH SAID GRAVITY FLOW PASSAGE, A CLOSURE VALVE FOR SAID DISCHARGE OPENING COMPRISING A FLEXIBLE DISCHARGE TUBE FORMING A PORTION OF SAID DISCHARGE OPENING, A PLUNGER, SPRING MEANS NORMALLY BIASING SAID PLUNGER AGAINST SAID TUBE CLAMPING SAID TUBE SHUT, MEANS FOR AUTOMATICALLY OPENING SAID CLOSURE VALVE UPON ATTACHMENT OF SAID CONTAINER ABOVE SAID GRAVITY FLOW PASSAGE AND FOR AUTOMATICALY CLOSING SAID CLOSURE VALVE UPON DETACHING SAID CONTAINER COMPRISING MEANS ADJACENT SAID GRAVITY FLOW PASSAGE FOR PRESSING SAID PLUNGER TO RE-
Claim 2
Dependent Claim
118 words
A POWDER FEED AND METERING DEVICE FOR A FLAME SPRAY GUN COMPRISING MEANS DEFINING A GRAVITY FLOW PASSAGE FOR POWDER, A CONTAINER FOR POWDER DETACHABLY MOUNTED ABOVE SAID GRAVITY FLOW PASSAGE AND HAVING A DISCHARGE OPENING IN COMMUNICATION WITH SAID GRAVITY FLOW PASSAGE, A CLOSURE VALVE FOR SAID DISCHARGE OPENING COMPRISING A FLEXIBLE DISCHARGE TUBE FORMING A PORTION OF SAID DISCHARGE OPENING, A PLUNGER, SPRING MEANS NORMALLY BIASING SAID PLUNGER AGAINST SAID TUBE CLAMPING SAID TUBE SHUT, MEANS FOR AUTOMATICALLY OPENING SAID CLOSURE VALVE UPON ATTACHMENT OF SAID CONTAINER ABOVE SAID GRAVITY FLOW PASSAGE AND FOR AUTOMATICALY CLOSING SAID CLOSURE VALVE UPON DETACHING SAID CONTAINER COMPRISING MEANS ADJACENT SAID GRAVITY FLOW PASSAGE FOR PRESSING SAID PLUNGER TO RE-
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) | 1967-06-23 | 1967-12-23 | 1968-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-23 | 1971-12-23 | 1972-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-23 | 1975-12-23 | 1976-06-23 | $7700.00 | Window Closed / Lapsed |