Source: http://www.google.com/patents/US4693404?dq=U.S.+Patent+No.+4,528,643
Timestamp: 2014-07-24 04:57:00
Document Index: 497098313

Matched Legal Cases: ['arts 16', 'art 16', 'arts 16', 'art 16', 'art 16', 'art 16', 'arts 16', 'art 16', 'art 18']

Patent US4693404 - Mains bursting tool - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign in<nobr>Advanced Patent Search</nobr>PatentsA tool has a hollow elongated body 10 made up of a leading section 12 attachable to a tow-cable by a clevis 28, an intermediate section 14 and a trailing section 20 housing a hydraulic cylinder 24 and attachable to a main liner 30. The intermediate section includes a frusto-conical wall in two parts...http://www.google.com/patents/US4693404?utm_source=gb-gplus-sharePatent US4693404 - Mains bursting toolAdvanced Patent SearchPublication numberUS4693404 APublication typeGrantApplication numberUS 06/810,245Publication dateSep 15, 1987Filing dateDec 18, 1985Priority dateJan 10, 1985Fee statusPaidAlso published asCA1237118A1Publication number06810245, 810245, US 4693404 A, US 4693404A, US-A-4693404, US4693404 A, US4693404AInventorsMalcolm Wayman, Geoffrey I. MoodOriginal AssigneeBritish Gas CorporationExport CitationBiBTeX, EndNote, RefManPatent Citations (16), Referenced by (26), Classifications (11), Legal Events (5) External Links: USPTO, USPTO Assignment, EspacenetMains bursting toolUS 4693404 AAbstract A tool has a hollow elongated body 10 made up of a leading section 12 attachable to a tow-cable by a clevis 28, an intermediate section 14 and a trailing section 20 housing a hydraulic cylinder 24 and attachable to a main liner 30. The intermediate section includes a frusto-conical wall in two parts 16 and 18, each of 180� angular extent. The ram 24 operates a wedge 22 longitudinally to move the first part 16 outwardly or inwardly transversely of the body. The parts 16, 18 are slidably trapped to the wedge by slide components projecting into grooves. The tool is pulled by the two cable into the main with the part 16 retracted. Then the part 16 is moved outwardly to burst and enlarge the main, allowing the tool to advance further after retraction of the part 16. The parts 16, 18 each have an external longitudinal rib 68, 70. The part 16 has longitudinal marginal extensions overlapping the longitudinal margins of the part 18.
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