Patent US3294928A successfully refreshed from Google Patents.
US5487576A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air management system filter removing tool and metallic debris retriever
Assignee: Individual
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Filing: 1994-04-25
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Granted: 1996-01-30
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Expires: 2014-04-25
Abstract
Abstract A telescoping hand tool for retrieving filters or metallic debris in the duct work of air management systems where the tool is formed from non-metallic materials and employs a hook designed to remove a filter without significantly damaging the filter frame and alternatively a magnet designed to slide along the duct work and collect metallic debris.
Inventors
- 👤 Michael G. DuVivier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:12
CPC Classifications
B; B25; B25B; B25B9/00; B25B11/00; B25B11/002; B25J; B25J1/00; B25J1/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
294 words
A telescoping retrieval hand tool for retreiving debris and filter screens in air management systems comprising: a) a handle formed from a group of lightweight and strong materials including carbon composites, KEVLAR, and fiberglass; a body of the handle; a grip substantially surrounding the body; a receiving means located along a longitudinal axis of the body further comprising an elongated hollow tube; b) a tubular means further comprising: a first tubular member disposed partially within the receiving means; a plurality of elongated tube members concentrically aligned within the first tubular member and having a friction fit; the plurality of elongated tube members capably movable in an axially sliding relative relationship; c) means for limiting the length of extension of the plurality of elongated tube members further comprising an outwardly facing lip at one end of each of the plurality of elongated members and the first tubular member and an inwardly facing lip at the opposite end of each of the plurality of elongated tube members; whereby the concentric arrangement of the plurality of elongated tube members allows the outwardly facing lip of an elongated tube member to engage the inwardly facing lip of the elongated tube member in which it is disposed, thereby preventing further axial movement; d) a plurality of removal tools further comprising: an elongated ellipsoidal steel magnet selectively and removably attached to the elongated tube having the longest extension; a hook adapted to engage an edge of a screen when the screen is operatively disposed in an air flow duct, the hook selectively and removably attached to the elongated tube having the longest extension; and e) the hook and the tubular means being formed from a strong and lightweight material selected from a group of materials including plastic, fiberglass and KEVLAR.
Claim 2
Dependent Claim
294 words
A telescoping retrieval hand tool for retreiving debris and filter screens in air management systems comprising: a) a handle formed from a group of lightweight and strong materials including carbon composites, KEVLAR, and fiberglass; a body of the handle; a grip substantially surrounding the body; a receiving means located along a longitudinal axis of the body further comprising an elongated hollow tube; b) a tubular means further comprising: a first tubular member disposed partially within the receiving means; a plurality of elongated tube members concentrically aligned within the first tubular member and having a friction fit; the plurality of elongated tube members capably movable in an axially sliding relative relationship; c) means for limiting the length of extension of the plurality of elongated tube members further comprising an outwardly facing lip at one end of each of the plurality of elongated members and the first tubular member and an inwardly facing lip at the opposite end of each of the plurality of elongated tube members; whereby the concentric arrangement of the plurality of elongated tube members allows the outwardly facing lip of an elongated tube member to engage the inwardly facing lip of the elongated tube member in which it is disposed, thereby preventing further axial movement; d) a plurality of removal tools further comprising: an elongated ellipsoidal steel magnet selectively and removably attached to the elongated tube having the longest extension; a hook adapted to engage an edge of a screen when the screen is operatively disposed in an air flow duct, the hook selectively and removably attached to the elongated tube having the longest extension; and e) the hook and the tubular means being formed from a strong and lightweight material selected from a group of materials including plastic, fiberglass and KEVLAR.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-01-29 | 1999-07-31 | 2000-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-01-29 | 2003-07-31 | 2004-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-01-29 | 2007-07-31 | 2008-01-30 | $7700.00 | Window Closed / Lapsed |