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US3868046A Expired / Lapsed US ⏱️ 0.0 years remaining

Extruder

Assignee: Cities Service Co
•
Filing: 1970-12-03
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Granted: 1975-02-25
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Expires: 1990-12-03
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Abstract

Abstract A portable extruder for dispensing highly viscous 100 percent butyl sealant compounds under sufficient fore force and low enough viscosity to enter any areas desired. The extruder comprises in combination: a barrel having a rotatably mounted extruding screw axially mounted therein; a power head for driving the extruding screw mounted at one end of the barrel and an extruding die having an orifice therein mounted at the other end of the barrel. An electrical resistance heater suitably insulated on the outside is surroundingly mounted on the barrel adjacent the extruding screw in order to heat sealant compound in the barrel. A port is transversely located in the barrel adjacent the drive end of the screw for introducing sealant into the barrel.

Inventors

  • 👤 John Maddalena

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-06 14:45
CPC Classifications
B; B29; B29B; B29B13/00; B29B13/02; B29B13/022; B05; B05C; B05C17/00; B05C17/005; B05C17/00523; B05C17/00526; B05C17/0053; B29C; B29C48/00; B29C48/02; B29C48/25; B29C48/285; B29C48/288; B29C48/2888; B29C65/00; B29C65/02; B29C65/40; B29C66/00; B29C66/80; B29C66/84; B29C66/861; B29C48/03; B29K; B29K2105/00; B29K2105/06; B29K2105/16

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 222 words
Portable apparatus for applying a sealant to a surface comprising: a portable extruder which can be hand held and moved and operated by hand, said extruder having a. an elongated barrel, b. an extruding screw coaxially and rotatively mounted within the barrel, c. a feed port for sealant toward one end of the barrel and which extends through the side of the barrel and communicates with the interior thereof adjacent the extruding screw, d. a sealant extrusion orifice located toward the end of the barrel opposite the end at which the feed port is located, e. means for heating the barrel, f. a power head attached to the screw and whereupon applying power to the head the extrusion screw is rotated and a sealant can be drawn into the barrel, conveyed along the length thereof and then discharged through the extrusion orifice by rotation of the extrusion screw, B. hand grip means on said extruder for holding, moving and thus guiding the extrusion orifice by hand over a surface onto which the sealant is applied, and C. a reel rotatively mounted on the extruder and a sealant rope wound upon the reel and extending from the reel to said feed port, said rope being drawn from said reel and into the extruder barrel upon rotation of said extruding screw in the barrel.
Claim 2
Dependent Claim 222 words
Portable apparatus for applying a sealant to a surface comprising: a portable extruder which can be hand held and moved and operated by hand, said extruder having a. an elongated barrel, b. an extruding screw coaxially and rotatively mounted within the barrel, c. a feed port for sealant toward one end of the barrel and which extends through the side of the barrel and communicates with the interior thereof adjacent the extruding screw, d. a sealant extrusion orifice located toward the end of the barrel opposite the end at which the feed port is located, e. means for heating the barrel, f. a power head attached to the screw and whereupon applying power to the head the extrusion screw is rotated and a sealant can be drawn into the barrel, conveyed along the length thereof and then discharged through the extrusion orifice by rotation of the extrusion screw, B. hand grip means on said extruder for holding, moving and thus guiding the extrusion orifice by hand over a surface onto which the sealant is applied, and C. a reel rotatively mounted on the extruder and a sealant rope wound upon the reel and extending from the reel to said feed port, said rope being drawn from said reel and into the extruder barrel upon rotation of said extruding screw in the barrel.
Claim 3
Dependent Claim 44 words
The apparatus of claim 1 wherein the power head comprises a transmission driven by an electric motor and has an output element attached to said screw, and further comprising a trigger for activating the electric motor while the extruder is being held by hand.
Claim 4
Dependent Claim 21 words
The apparatus of claim 1 wherein the means for heating the barrel is an electric resistance heater mounted adjacent the barrel.

References Cited (Backward Citations)

US2125781A Cited
US2416370A Cited
US2979237A Cited
US3043480A Cited
US3239103A Cited
US3281576A Cited
US3314573A Cited
US3433082A Cited
US3585361A Cited
US3587930A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1978-02-24 1978-08-26 1979-02-25 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-02-24 1982-08-26 1983-02-25 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-02-24 1986-08-26 1987-02-25 $7700.00 Window Closed / Lapsed

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