Patent US3823462A successfully refreshed from Google Patents.
US3823462A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Extractor tool
Assignee: Individual
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Filing: 1972-09-11
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Granted: 1974-07-16
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Expires: 1992-09-11
Abstract
Abstract A tool to facilitate the extraction of the broken components of a sprinkler system from the interior of conduit pieces used and/or to facilitate the disassembly of such sprinkler systems. The conduit is held while an element exerts a leverage derived force against the sprinkler system component whereby the conduit and component are moved reciprocally apart. Knurled or toothed surfaces are provided on element engaging faces for the efficient transmission of the leverage forces derived from plier or screw elements.
Inventors
- 👤 M Kanda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:24
CPC Classifications
B; B25; B25B; B25B27/00; B25B27/02; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/53652; Y10T29/53796; Y10T29/53896; Y10T29/539; Y10T29/53987
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
183 words
A tool for extracting sprinkler system components from positions of engagement in conduits thereof comprising paired expansion extractor element jaws for insertion through the bore of said sprinkler system components, mechanical tooth elements on exterior surfaces of said expansion extractor element jaws positioned for contact along the secure engagement with the inner bore of said sprinkler system component, end flanges of said expansion extractor elements disposed substantially at right angles to said jaws and teeth for engagement behind the inwardly disposed terminal end of in-place sprinkler system components, and mechanical advantage means operative with said expansion extractor elements for moving said expansion extractor elements radially into engagement with the inner bore of said sprinkler system components. a collar for engagement about the exterior surface of said conduit, conduit engaging pieces for disposition about said conduit and within said collar, contraction means operative between said collar and conduit engaging pieces for moving said pieces toward secure contact with said conduit, and mechanical advantage means operative between said sprinklEr system component and collar for facilitating the removal of said components reciprocally away from said conduit.
Claim 2
Dependent Claim
183 words
A tool for extracting sprinkler system components from positions of engagement in conduits thereof comprising paired expansion extractor element jaws for insertion through the bore of said sprinkler system components, mechanical tooth elements on exterior surfaces of said expansion extractor element jaws positioned for contact along the secure engagement with the inner bore of said sprinkler system component, end flanges of said expansion extractor elements disposed substantially at right angles to said jaws and teeth for engagement behind the inwardly disposed terminal end of in-place sprinkler system components, and mechanical advantage means operative with said expansion extractor elements for moving said expansion extractor elements radially into engagement with the inner bore of said sprinkler system components. a collar for engagement about the exterior surface of said conduit, conduit engaging pieces for disposition about said conduit and within said collar, contraction means operative between said collar and conduit engaging pieces for moving said pieces toward secure contact with said conduit, and mechanical advantage means operative between said sprinklEr system component and collar for facilitating the removal of said components reciprocally away from said conduit.
Claim 3
Dependent Claim
28 words
Structure as set forth in claim 1 wherein said collar is split to provide a gap whereby the collar can be applied laterally to partially encircle said conduit.
Claim 4
Dependent Claim
20 words
Structure as set forth in claim 1 and further comprising an expansion plier leverage component as said mechanical advantage means.
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) | 1977-07-15 | 1978-01-14 | 1978-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-15 | 1982-01-14 | 1982-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-15 | 1986-01-14 | 1986-07-16 | $7700.00 | Window Closed / Lapsed |