Patent US3854634A successfully refreshed from Google Patents.
US3854634A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Powder dispenser
Assignee: Commercial Resins Co
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Filing: 1974-01-02
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Granted: 1974-12-17
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Expires: 1994-01-02
Abstract
Abstract A powder dispenser includes a powder container with a top having inlet and outlet holes. A plate of size slightly less than the inside of the container is movably disposed within the container above the contained powder. A tube connected to the plate in communication with a hole through it extends to outside the container through the inlet hole. A second tube is mounted to the top of the container in communication with the inlet hole and the first tube is longitudinally slideably located within the second tube. A blower is carried by the second tube to force air through the second and first tubes to between the plate and the powder. The air from the blower picks up the powder, moves it in the space between the edge of the plate and the container to above the plate, and dispells it through the outlet hole.
Inventors
- 👤 R Hart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:42
CPC Classifications
B; B05; B05B; B05B7/00; B05B7/14; B05B7/1404; A; A01; A01M; A01M9/00; A01M9/0092; B05B7/1472
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
138 words
A powder dispenser, comprising, an enclosable powder receiving receptacle having input and output holes, movable plate means locatable within said receptacle, a first tube attached adjacent a hole through said plate means and extending through the input hole to outside said container to define an airflow path therebetween, a second tube disposed about said first tube, extending outwardly from said container from said input hole, blower means for ejecting a gas into said second tube to be conducted by said first tube through the hole in said plate means to pick up the powder and expel it through the exhaust hole, and for maintaining the position of said plate means above the powder to form a gas flow path of constant dimensions above said powder to provide uniform powder pick up independent of the quantity of contained powder.
Claim 2
Dependent Claim
138 words
A powder dispenser, comprising, an enclosable powder receiving receptacle having input and output holes, movable plate means locatable within said receptacle, a first tube attached adjacent a hole through said plate means and extending through the input hole to outside said container to define an airflow path therebetween, a second tube disposed about said first tube, extending outwardly from said container from said input hole, blower means for ejecting a gas into said second tube to be conducted by said first tube through the hole in said plate means to pick up the powder and expel it through the exhaust hole, and for maintaining the position of said plate means above the powder to form a gas flow path of constant dimensions above said powder to provide uniform powder pick up independent of the quantity of contained powder.
Claim 3
Dependent Claim
84 words
The powder dispenser of claim 1 further comprising a ring locatable in said first tube, and wherein said first tube has a plurality of holes formed therethrough above said plate means within said container whereby a portion of the air from said blower means is diverted therethrough, said ring being of thickness sufficient to obstruct at least a portion of said holes, to control the ratio of the air flowing through said holes to the air flowing through said hole in said plate means.
Claim 4
Dependent Claim
40 words
The powder dispenser of claim 1 wherein said second tube is made of transparent material whereby said first tube can be observed to indicate the height of the plate means wIthin said container to indicate the quantity of contained powder.
Claim 5
Dependent Claim
154 words
A powder dispenser, comprising, a cylindrical container of first diameter, said container being open at its top for receiving the powder, a top for enclosing said container having inlet and outlet holes, an air inlet plenum attached to said top and communicating with said inlet hole, an air blower carried by said air inlet plenum to blow air thereinto, a discoidal plate locatable within said container above the powder of second diameter slightly less than said first diameter, and a second air inlet plenum longitudinally slidably located partially within said first air inlet plenum, attached to said plate in communication with the hole therethrough, whereby air from said blower is injected through said first and second plenums to between said plate and the powder to maintain an airspace therebetween and to entrain a constant portion of the powder in the airspace to be expelled between the plate and container and through the outlet hole.
Claim 6
Dependent Claim
154 words
A powder dispenser, comprising, a cylindrical container of first diameter, said container being open at its top for receiving the powder, a top for enclosing said container having inlet and outlet holes, an air inlet plenum attached to said top and communicating with said inlet hole, an air blower carried by said air inlet plenum to blow air thereinto, a discoidal plate locatable within said container above the powder of second diameter slightly less than said first diameter, and a second air inlet plenum longitudinally slidably located partially within said first air inlet plenum, attached to said plate in communication with the hole therethrough, whereby air from said blower is injected through said first and second plenums to between said plate and the powder to maintain an airspace therebetween and to entrain a constant portion of the powder in the airspace to be expelled between the plate and container and through the outlet hole.
Claim 7
Dependent Claim
49 words
The dispenser of claim 4 wherein said second air plenum futher has formed a plurality of holes therethrough at a location adjacent its connection with said plate, whereby air within said second air plenum is additionally expelled through said holes to control the rate of distribution of the powder.
Claim 8
Dependent Claim
33 words
The dispenser of claim 5 further comprising means for partially blocking the holes in said second air plenum above the plate to control the amount of powder flow exhausted through said outlet hole.
Claim 9
Dependent Claim
34 words
The apparatus of claim 4 wherein said first air plenum is of transparent material whereby the longitudinal position of the second air plenum can be observed to indicate the powder level within the container.
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) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |