US3682384A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Projection gun
Assignee: Individual
•
Filing: 1970-04-22
•
Granted: 1972-08-08
•
Expires: 1990-04-22
Abstract
Abstract An improved projection gun for products in the form of particles, said gun being of light construction and permitting projections of product at relatively-high flow-rates. The gun comprises a plurality of tubes fixed between a rear end-plate and a projection nozzle, said tubes serving to receive an intake tube for the projected product and a high-tension cable for electrically charging the product, the interstitial space between the tubes and an external sleeve being used to form a conduit for auxiliary air which passes into a distribution chamber and thence through tangential passages, so as to give a whirling motion to the projected products. This gun may be employed for the projection of powder, paint, varnish, enamel, etc...
Inventors
- 👤 Georges Suisse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:57
CPC Classifications
B; B05; B05B; B05B5/00; B05B5/025; B05B5/03; B05B5/032
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
237 words
In portable projection apparatus for discharging and applying an electrostatic charge to a product to be projected, the combination comprising: hand-held barrel means defining an internal conduit; projection nozzle means carried adjacent one end of the barrel mEans and including a discharge portion and chamber defining means in spaced relationship with the discharge portion, said chamber defining means forming an annular chamber disposed around the discharge portion and at least one passage which extends from the chamber into the space between the chamber defining means and the discharge portion, said chamber communicating with said internal conduit; a plurality of longitudinally extending conduits eccentrically disposed within the internal conduit to form an interstitial space between the longitudinal conduits and the barrel means, each of said longitudinally extending conduits being connected at one end to the projection nozzle means; means for supplying project to be projected to one of the longitudinally extending conduits, said one conduit communicating with the discharge portion of said projection nozzle means to discharge the product therefrom; means for applying a high d.c. voltage to the other longitudinally extending conduit, said other conduit being in electrically conductive relationship with the projection nozzle means to apply an electrostatic charge to the product; and means for directing fluid to the internal conduit and long said interstitial space to said chamber, said fluid being discharged through said passage to provide an auxiliary fluid flow adjacent the discharged product.
Claim 2
Dependent Claim
237 words
In portable projection apparatus for discharging and applying an electrostatic charge to a product to be projected, the combination comprising: hand-held barrel means defining an internal conduit; projection nozzle means carried adjacent one end of the barrel mEans and including a discharge portion and chamber defining means in spaced relationship with the discharge portion, said chamber defining means forming an annular chamber disposed around the discharge portion and at least one passage which extends from the chamber into the space between the chamber defining means and the discharge portion, said chamber communicating with said internal conduit; a plurality of longitudinally extending conduits eccentrically disposed within the internal conduit to form an interstitial space between the longitudinal conduits and the barrel means, each of said longitudinally extending conduits being connected at one end to the projection nozzle means; means for supplying project to be projected to one of the longitudinally extending conduits, said one conduit communicating with the discharge portion of said projection nozzle means to discharge the product therefrom; means for applying a high d.c. voltage to the other longitudinally extending conduit, said other conduit being in electrically conductive relationship with the projection nozzle means to apply an electrostatic charge to the product; and means for directing fluid to the internal conduit and long said interstitial space to said chamber, said fluid being discharged through said passage to provide an auxiliary fluid flow adjacent the discharged product.
Claim 3
Dependent Claim
45 words
In portable projection apparatus as defined in claim 1, said other longitudinally extending conduit comprising: an electrical conductor protruding through the end of the barrel means opposite that adjacent the projection nozzle means, and a resistance element connected to said conductor within the barrel means.
Claim 4
Dependent Claim
253 words
In portable projection apparatus for discharging and applying an electrostatic charge to a product to be projected, the combination comprising: barrel means defining a internal conduit; a handle having a control trigger affixed to the barrel means; projection nozzle means carried adjacent one end of the barrel means and including a discharge portion and chamber defining means in spaced relationship with the discharge portion, said chamber defining means forming an annular chamber disposed around the discharge portion and a plurality of passages which extend tangentially from the chamber into the space between the chamber defining means and the discharge portion, said chamber communicating with said internal conduit; a plurality of longitudinally extending conduits eccentrically disposed within the internal conduit to form an interstitial space between the longitudinal conduits and the barrel means, each of said longitudinally extending conduits being connected at one end to the projection nozzle means; means for supplying product to be projected to one of the longitudinally extending conduits, said one conduit communicating with the discharge portion of said projection nozzle means to discharge the product therefrom; means for applying a high d.c. voltage to the other longitudinally extending conduit, said other conduit being in electrically conductive relationship with the projection nozzle means to apply an electrostatic charge to the product; and means for directing fluid through said handle and into the internal conduit, said fluid flowing along said interstitial space to said chamber and being discharged through said passages to provide an auxiliary fluid flow adjacent the discharged product.
Claim 5
Dependent Claim
253 words
In portable projection apparatus for discharging and applying an electrostatic charge to a product to be projected, the combination comprising: barrel means defining a internal conduit; a handle having a control trigger affixed to the barrel means; projection nozzle means carried adjacent one end of the barrel means and including a discharge portion and chamber defining means in spaced relationship with the discharge portion, said chamber defining means forming an annular chamber disposed around the discharge portion and a plurality of passages which extend tangentially from the chamber into the space between the chamber defining means and the discharge portion, said chamber communicating with said internal conduit; a plurality of longitudinally extending conduits eccentrically disposed within the internal conduit to form an interstitial space between the longitudinal conduits and the barrel means, each of said longitudinally extending conduits being connected at one end to the projection nozzle means; means for supplying product to be projected to one of the longitudinally extending conduits, said one conduit communicating with the discharge portion of said projection nozzle means to discharge the product therefrom; means for applying a high d.c. voltage to the other longitudinally extending conduit, said other conduit being in electrically conductive relationship with the projection nozzle means to apply an electrostatic charge to the product; and means for directing fluid through said handle and into the internal conduit, said fluid flowing along said interstitial space to said chamber and being discharged through said passages to provide an auxiliary fluid flow adjacent the discharged product.
Claim 6
Dependent Claim
197 words
In projection apparatus, the combination comprising: barrel means defining an internal conduit; projection nozzle means carried adjacent one end of the barrel means and including a discharge portion and chamber defining means in spaced relationship with the discharge portion, said chamber defining means forming an annular chamber disposed around the discharge portion and at least one passage which extends from the chamber into the space between the chamber defining means and the discharge portion, said passage extending in a direction tangeNt to said annular chamber and said chamber communicating with said internal conduit; a plurality of longitudinally extending conduits eccentrically disposed within the internal conduit, to form an interstitial space between the longitudinal conduits and the barrel means, each of said longitudinally extending conduits being connected to the projection nozzle means; means for supplying product to be projected to one of the longitudinally extending conduits, said one conduit communicating with the discharge portion of said projection nozzle means to discharge the product therefrom; and means for directing fluid to the internal conduit and along said interstitial space to said chamber, said fluid being discharged through said passage to provide an auxiliary fluid flow adjacent the discharged product.
Claim 7
Dependent Claim
197 words
In projection apparatus, the combination comprising: barrel means defining an internal conduit; projection nozzle means carried adjacent one end of the barrel means and including a discharge portion and chamber defining means in spaced relationship with the discharge portion, said chamber defining means forming an annular chamber disposed around the discharge portion and at least one passage which extends from the chamber into the space between the chamber defining means and the discharge portion, said passage extending in a direction tangeNt to said annular chamber and said chamber communicating with said internal conduit; a plurality of longitudinally extending conduits eccentrically disposed within the internal conduit, to form an interstitial space between the longitudinal conduits and the barrel means, each of said longitudinally extending conduits being connected to the projection nozzle means; means for supplying product to be projected to one of the longitudinally extending conduits, said one conduit communicating with the discharge portion of said projection nozzle means to discharge the product therefrom; and means for directing fluid to the internal conduit and along said interstitial space to said chamber, said fluid being discharged through said passage to provide an auxiliary fluid flow adjacent the discharged product.
Claim 8
Dependent Claim
37 words
In portable projection apparatus as defined in claim 4, means defining a transverse wall at the end of the barrel means opposite that adjacent the projection nozzle means, said longitudinally extending conduits protruding through said transverse wall.
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) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |