Patent US5404967A successfully refreshed from Google Patents.
US5404967A
Expired / Lapsed
US
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Extruding device
Assignee: Power B International Inc
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Filing: 1993-05-14
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Granted: 1995-04-11
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Expires: 2013-05-14
Abstract
Abstract A grease gun used to provide grease to a fitting. A first and second piston are reciprocated with respective passageways by an electric motor and act to press grease through the passageways into the fitting. The electric motor rotates a cam and the cam, in turn, moves a drive pin which is connected to the pistons through a piston block to provide the reciprocal motion. Single handed operation of the grease gun is possible after connecting it to the fitting.
Inventors
- 👤 Hubert M. Barry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:26
CPC Classifications
F; F16; F16N; F16N3/00; F16N3/10; F16N3/12; F16N13/00; F16N13/02; F16N13/06; F16N13/10; F16N2013/063
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
79 words
Extruding apparatus to extrude fluid said apparatus comprising a housing, a source of fluid in said housing, a first passageway extending from said source of fluid in said housing to a second and a third passageway, a first piston reciprocal within said second passageway, a second piston reciprocal within said third passageway, said first piston and said second piston being substantially parallel and moving simultaneously in the same direction to discharge said fluid from said second and third passageways.
Claim 2
Dependent Claim
79 words
Extruding apparatus to extrude fluid said apparatus comprising a housing, a source of fluid in said housing, a first passageway extending from said source of fluid in said housing to a second and a third passageway, a first piston reciprocal within said second passageway, a second piston reciprocal within said third passageway, said first piston and said second piston being substantially parallel and moving simultaneously in the same direction to discharge said fluid from said second and third passageways.
Claim 3
Dependent Claim
24 words
Extruding apparatus as in claim 1 wherein said fluid is grease and said fluid is extruded from a grease gun to a grease fitting.
Claim 4
Dependent Claim
26 words
Extruding apparatus as in claim 2 wherein said first and second pistons are reciprocated simultaneously by a cam, said cam being powered by an electrical motor.
Claim 5
Dependent Claim
21 words
Extruding apparatus as in claim 1 wherein said fluid is caulking compound and said fluid is extruded from a caulking gun.
Claim 6
Dependent Claim
20 words
Extruding apparatus as in claim 1 wherein said fluid is sealant and said fluid is extruded from a sealing gun.
Claim 7
Dependent Claim
11 words
Extruding apparatus as in claim 1 wherein said fluid is edible.
Claim 8
Dependent Claim
13 words
Extruding apparatus as in claim 1 wherein said fluid is a pharmaceutical preparation.
References Cited (Backward Citations)
BE536119A
Cited
CA467374A
Cited
US2626085A
Cited
US2928574A
Cited
GB1210199A
Cited
US4257540A
Cited
US5105912A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-04-10 | 1998-10-10 | 1999-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-04-10 | 2002-10-10 | 2003-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-04-10 | 2006-10-10 | 2007-04-11 | $7700.00 | Window Closed / Lapsed |