US3786309A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic powder spraying method and apparatus
Assignee: Motors Liquidation Co
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Filing: 1973-01-12
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Granted: 1974-01-15
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Expires: 1993-01-12
Abstract
Abstract An electrostatic powder spraying method and apparatus wherein random electrical charges are neutralized on the powder to be sprayed prior to delivery of the powder particles to an electrostatic powder spray gun.
Inventors
- 👤 N Miottel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:37
CPC Classifications
B; B05; B05B; B05B5/00; B05B5/025; B05B5/03; B05B5/032
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
109 words
Electrostatic powder spraying apparatus of the character described, comprising: a powder fluidizing bed; a source of fluidizing air for fluidizing powder particles in said bed; a first air line connecting said fluidizing air to said bed; a powder pump in said fluidized bed; a source of carrier air; a second air line connecting said carrier air to said pump; an electrostatic powder spray gun for electrically charging said fluidized powder particles and spraying the same; a carrier line connecting said powder pump to said gun for delivering fluidized powder particles to said gun; and means for neutralizing random electrical charges on said powder particles before delivery to said gun.
Claim 2
Dependent Claim
109 words
Electrostatic powder spraying apparatus of the character described, comprising: a powder fluidizing bed; a source of fluidizing air for fluidizing powder particles in said bed; a first air line connecting said fluidizing air to said bed; a powder pump in said fluidized bed; a source of carrier air; a second air line connecting said carrier air to said pump; an electrostatic powder spray gun for electrically charging said fluidized powder particles and spraying the same; a carrier line connecting said powder pump to said gun for delivering fluidized powder particles to said gun; and means for neutralizing random electrical charges on said powder particles before delivery to said gun.
Claim 3
Dependent Claim
121 words
Electrostatic powder spraying apparatus of the character described, comprising: a powder fluidizing bed; a source of fluidizing air for fluidizing powder particles in said bed; a first air line connecting said fluidizing air to said bed; a powder pump in said fluidized bed; a source of carrier air; a second air line connecting said carrier air to said pump; an electrostatic powder spray gun for electrically charging said fluidized powder particles and spraying the same; a carrier line connecting said powder pump to said gun for delivering fluidized powder particles to said gun; and an air ionizing device in said carrier line closely adjacent said gun for neutralizing random electrical charges on said fluidized powder particles before delivery to said gun.
Claim 4
Dependent Claim
121 words
Electrostatic powder spraying apparatus of the character described, comprising: a powder fluidizing bed; a source of fluidizing air for fluidizing powder particles in said bed; a first air line connecting said fluidizing air to said bed; a powder pump in said fluidized bed; a source of carrier air; a second air line connecting said carrier air to said pump; an electrostatic powder spray gun for electrically charging said fluidized powder particles and spraying the same; a carrier line connecting said powder pump to said gun for delivering fluidized powder particles to said gun; and an air ionizing device in said carrier line closely adjacent said gun for neutralizing random electrical charges on said fluidized powder particles before delivery to said gun.
Claim 5
Dependent Claim
124 words
Electrostatic powder spraying apparatus of the character described, comprising: a powder fluidizing bed; a source of fluidizing air for fluidizing powder particles in said bed; a first air line connecting said fluidizing air to said bed; an air ionizing device in said first air line at a location closely adjacent said fluidizing bed for neutralizing random electrical charges on said powder particles in said fluidized bed; a powder pump in said fluidized bed; a source of carrier air; a second air line connecting said carrier air to said pump; an electrostatic powder spray gun for electrically charging said fluidized powder particles and spraying the same; and a carrier line connecting said powder pump to said gun for delivering fluidized powder particles to said gun.
Claim 6
Dependent Claim
124 words
Electrostatic powder spraying apparatus of the character described, comprising: a powder fluidizing bed; a source of fluidizing air for fluidizing powder particles in said bed; a first air line connecting said fluidizing air to said bed; an air ionizing device in said first air line at a location closely adjacent said fluidizing bed for neutralizing random electrical charges on said powder particles in said fluidized bed; a powder pump in said fluidized bed; a source of carrier air; a second air line connecting said carrier air to said pump; an electrostatic powder spray gun for electrically charging said fluidized powder particles and spraying the same; and a carrier line connecting said powder pump to said gun for delivering fluidized powder particles to said gun.
Claim 7
Dependent Claim
153 words
Electrostatic powder spraying apparatus of the character described, comprising: a powder fluidizing bed; a source of fluidizing air for fluidizing powder particles in said bed; a first air line connecting said fluidizing air to said bed; a first air ionizing device in said first air line at a location closely adjacent said fluidizing bed for neutralizing random electrical charges on said powder particles in said fluidized bed; a powder pump in said fluidized bed; a source of carrier air; a second air line connecting said carrier air to said pump; an electrostatic powder spray gun for electrically charging said fluidized powder particles and spraying the same; a carrier line connecting said powder pump to said gun for delivering fluidized powder particles to said gun; and a second air ionizing device in said carrier line closely adjacent said gun for neutralizing random electrical charges on said fluidized powder particles before delivery to said gun.
Claim 8
Dependent Claim
153 words
Electrostatic powder spraying apparatus of the character described, comprising: a powder fluidizing bed; a source of fluidizing air for fluidizing powder particles in said bed; a first air line connecting said fluidizing air to said bed; a first air ionizing device in said first air line at a location closely adjacent said fluidizing bed for neutralizing random electrical charges on said powder particles in said fluidized bed; a powder pump in said fluidized bed; a source of carrier air; a second air line connecting said carrier air to said pump; an electrostatic powder spray gun for electrically charging said fluidized powder particles and spraying the same; a carrier line connecting said powder pump to said gun for delivering fluidized powder particles to said gun; and a second air ionizing device in said carrier line closely adjacent said gun for neutralizing random electrical charges on said fluidized powder particles before delivery to said gun.
Claim 9
Independent Claim
54 words
A method of electrostatically spraying a powder comprising: fluidizing the powder particles to be sprayed, delivering said fluidized powder particles to an electrostatic spray gun; neutralizing random electrical charges on said powder particles prior to their delivery to said spray gun; and electrically charging said fluidized powder particles and spraying them from said gun.
Claim 10
Independent Claim
54 words
A method of electrostatically spraying a powder comprising: fluidizing the powder particles to be sprayed, delivering said fluidized powder particles to an electrostatic spray gun; neutralizing random electrical charges on said powder particles prior to their delivery to said spray gun; and electrically charging said fluidized powder particles and spraying them from said gun.
Claim 11
Independent Claim
54 words
A method of electrostatically spraying a powder, comprising: neutralizing random electrical charges on powder particles in a fluidizing bed while fluidizing said powder particles; neutralizing random electrical charges on said fluidized powder particles while delivering them to an electrostatic spray gun; and electrically charging said fluidized powder particles and spraying them from said gun.
Claim 12
Independent Claim
54 words
A method of electrostatically spraying a powder, comprising: neutralizing random electrical charges on powder particles in a fluidizing bed while fluidizing said powder particles; neutralizing random electrical charges on said fluidized powder particles while delivering them to an electrostatic spray gun; and electrically charging said fluidized powder particles and spraying them from said gun.
References Cited (Backward Citations)
US3263127A
Cited
US3413545A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |