Patent US4393899A successfully refreshed from Google Patents.
US4393899A
Expired / Lapsed
US
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Plugging apparatus
Assignee: Toshiba Corp
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Filing: 1980-12-01
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Granted: 1983-07-19
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Expires: 2000-12-01
Abstract
Abstract Apparatus for plugging a plurality of cylindrical holes provided at an inner peripheral wall of a cylindrical container comprises a plurality of plugs to be inserted into the plurality of holes for plugging the same, a support ring assembly having an outer diameter smaller than an inner diameter of the container, and a beam assembly for operating the support ring assembly and the plugs. The support ring assembly supports the plugs on an inner side of the container after the plugs have been inserted into the cylindrical holes, respectively.
Inventors
- 👤 Tadashi Tsuji
- 👤 Ryokichi Igarashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:19
CPC Classifications
G; G21; G21C; G21C17/00; G21C13/00; G21C13/02; G21C13/06; G21C13/067; Y; Y02; Y02E; Y02E30/00; Y02E30/30
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
105 words
Apparatus for plugging a plurality of cylindrical holes provided through an inner peripheral wall of a cylindrical container, said apparatus comprising a plurality of plugs to be inserted into said plurality of holes for plugging the same, a supporting ring assembly having an outer diameter smaller than an inner diameter of said container, a beam assembly detachably connected to said ring assembly, means provided on said beam assembly for supporting said plurality of plugs and simultaneously forcing said plugs radially outwardly into said cylindrical holes of said cylindrical container, and means for preventing said plugs from being driven radially inwardly out of said cylindrical holes.
Claim 2
Dependent Claim
105 words
Apparatus for plugging a plurality of cylindrical holes provided through an inner peripheral wall of a cylindrical container, said apparatus comprising a plurality of plugs to be inserted into said plurality of holes for plugging the same, a supporting ring assembly having an outer diameter smaller than an inner diameter of said container, a beam assembly detachably connected to said ring assembly, means provided on said beam assembly for supporting said plurality of plugs and simultaneously forcing said plugs radially outwardly into said cylindrical holes of said cylindrical container, and means for preventing said plugs from being driven radially inwardly out of said cylindrical holes.
Claim 3
Dependent Claim
17 words
Apparatus as set forth in claim 1 wherein said supporting ring assembly is divided into circumferential pieces.
Claim 4
Dependent Claim
33 words
Apparatus as set forth in claim 1 which further comprises means for accurately positioning said supporting ring assembly so as to align said plugs supported by said supporting means with said cylindrical holes.
Claim 5
Dependent Claim
64 words
Apparatus as set forth in claim 3 wherein said positioning means comprises a plurality of brackets secured on the inner peripheral wall of the container in a circumferentially spaced apart relation, and a corresponding number of supporting pieces secured on the radially outer surface of said ring assembly so that said pieces are engageable with said brackets when said ring assembly is positioned correctly.
Claim 6
Dependent Claim
35 words
Apparatus as set forth in claim 1 wherein said means for supporting and forcing said plugs into said holes comprises carriages which are simultaneously driven radially outwardly along said beam assembly by a hydraulic device.
Claim 7
Dependent Claim
63 words
Apparatus as set forth in claim 1 wherein said means for preventing said plugs from being driven out of said cylindrical holes comprises means for bringing said ring assembly to a position where a rod projectable from said ring assembly is aligned with each said plug, and a hydraulic device for driving said rod radially outwardly into a tight contact with said plug.
References Cited (Backward Citations)
US4288290A
Cited
US4262702A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-07-18 | 1987-01-17 | 1987-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-18 | 1991-01-17 | 1991-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-18 | 1995-01-17 | 1995-07-19 | $7700.00 | Window Closed / Lapsed |