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US4051981A Expired / Lapsed US ⏱️ 0.0 years remaining

Powder gun

Assignee: Individual
•
Filing: 1975-12-15
•
Granted: 1977-10-04
•
Expires: 1995-12-15
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Abstract

Abstract A powder gun for dispensing a powder such as an insecticide or the like characterized by a hollow collapsible body for containing the powder, a dispensing member having a discharge port and spout for directing the discharged powder into the desired area and connected with the hollow collapsible body, and a filter and lump break up means disposed within the dispensing member immediately adjacent the discharge port for breaking up lumps and for filtering the powder and preventing entry of particles large enough to plug the discharge port and spout. The hollow collapsible body is normally biased to an extended position and movable to a compressed position for discharging air and any powder therewithin through the dispensing member. Also disclosed are preferred structural embodiments including a rotatable disc having multiple sections of stalks protruding substantially perpendicularly thereto for breaking up the lumps and for filtering the powder dispensed through the discharge spout, as well as preferred materials of construction.

Inventors

  • 👤 Louis John Mandlak

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-29 08:08
CPC Classifications
B; B05; B05B; B05B11/00; B05B11/01; B05B11/04; B05B11/041

Claims Analysis

Total Claims: 3
Claim 1
Independent Claim 294 words
A powder gun adapted for dispensing a powder regardless of lumps that may tend to form therein comprising: a. a hollow collapsible body that is normally biased to an extended position and movable to a compressed position for discharging air and any powder therewithin from said body through an aperture and a dispensing member; said hollow collapsible body including: i. a first aperture at one end; and ii. a first connection means portion for connecting said hollow collapsible body to a dispensing member; b. a dispensing member having: i. a second aperture adapted to mate with said first aperture of said hollow collapsible body; ii. a second connection means portion for matingly connecting to said first connection means portion for connecting said hollow collapsible body to said dispensing member, said second connection means portion being disposed adjacent said second aperture; iii. a discharge port disposed in said dispensing member and penetrating through a wall thereof for discharging powder therethrough; and iv. a discharge spout connected with said discharge port for directing said discharged powder into a desired area; and c. a filter and lump break-up means disposed in said dispensing member immediately adjacent said discharge port for breaking up lumps and for filtering said powder and preventing entry of particles large enough to plug said discharge spout; said filter and lump break-up means comprising a rotatable disc rotatably mounted in said discharge member and having at least two sections of upstanding stalks disposed at a predetermined angle with respect to said disc; said stalks being of respective predetermined diameters and disposed at respective predetermined distances apart in the respective sections to achieve the desired filtering action and being sized and shaped to achieve the desired break up of any lumps that tend to form.
Claim 2
Dependent Claim 294 words
A powder gun adapted for dispensing a powder regardless of lumps that may tend to form therein comprising: a. a hollow collapsible body that is normally biased to an extended position and movable to a compressed position for discharging air and any powder therewithin from said body through an aperture and a dispensing member; said hollow collapsible body including: i. a first aperture at one end; and ii. a first connection means portion for connecting said hollow collapsible body to a dispensing member; b. a dispensing member having: i. a second aperture adapted to mate with said first aperture of said hollow collapsible body; ii. a second connection means portion for matingly connecting to said first connection means portion for connecting said hollow collapsible body to said dispensing member, said second connection means portion being disposed adjacent said second aperture; iii. a discharge port disposed in said dispensing member and penetrating through a wall thereof for discharging powder therethrough; and iv. a discharge spout connected with said discharge port for directing said discharged powder into a desired area; and c. a filter and lump break-up means disposed in said dispensing member immediately adjacent said discharge port for breaking up lumps and for filtering said powder and preventing entry of particles large enough to plug said discharge spout; said filter and lump break-up means comprising a rotatable disc rotatably mounted in said discharge member and having at least two sections of upstanding stalks disposed at a predetermined angle with respect to said disc; said stalks being of respective predetermined diameters and disposed at respective predetermined distances apart in the respective sections to achieve the desired filtering action and being sized and shaped to achieve the desired break up of any lumps that tend to form.
Claim 3
Dependent Claim 49 words
The powder gun of claim 1 wherein said disc is substantially planar and said stalks are disposed substantially perpendicularly to the planar disc such that all of said stalks are available to break up any lumps to form, even when only a section is disposed adjacent said discharge port.

References Cited (Backward Citations)

US6015A Cited
US204564A Cited
US1613469A Cited
US2349875A Cited
US2645382A Cited
GB705302A Cited
US2764319A Cited
US2772816A Cited
US3151781A Cited
GB1079834A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1980-10-03 1981-04-04 1981-10-04 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1984-10-03 1985-04-04 1985-10-04 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1988-10-03 1989-04-04 1989-10-04 $7700.00 Window Closed / Lapsed

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