GB2336189A - Cutters - Google Patents

Cutters

Info

Publication number
GB2336189A
GB2336189A GB9904753A GB9904753A GB2336189A GB 2336189 A GB2336189 A GB 2336189A GB 9904753 A GB9904753 A GB 9904753A GB 9904753 A GB9904753 A GB 9904753A GB 2336189 A GB2336189 A GB 2336189A
Authority
GB
United Kingdom
Prior art keywords
pipe
length
cutter
hole
leakage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB9904753A
Other versions
GB9904753D0 (en
Inventor
Malcolm Harold Hanson
David Trevor Atkin
Eric Bridgstock
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fusion Group PLC
Original Assignee
Fusion Group PLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from GBGB9618980.8A external-priority patent/GB9618980D0/en
Application filed by Fusion Group PLC filed Critical Fusion Group PLC
Priority to GB9904753A priority Critical patent/GB2336189A/en
Publication of GB9904753D0 publication Critical patent/GB9904753D0/en
Publication of GB2336189A publication Critical patent/GB2336189A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L41/00—Branching pipes; Joining pipes to walls
    • F16L41/04—Tapping pipe walls, i.e. making connections through the walls of pipes while they are carrying fluids; Fittings therefor
    • F16L41/06—Tapping pipe walls, i.e. making connections through the walls of pipes while they are carrying fluids; Fittings therefor making use of attaching means embracing the pipe
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
    • F16L47/26—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics for branching pipes; for joining pipes to walls; Adaptors therefor
    • F16L47/34—Tapping pipes, i.e. making connections through walls of pipes while carrying fluids; Fittings therefor
    • F16L47/345—Tapping pipes, i.e. making connections through walls of pipes while carrying fluids; Fittings therefor making use of attaching means embracing the pipe

Abstract

The invention relates to cutters for cutting connecting holes in plastics pipes. Predominantly the connection of a service to an existing plastics pipe is by way of an electro-fusible saddle being located on and sealed to the pipe and the cutter introduced down the stem of the saddle to cut a hole in the pipe and thereby connect the pipe to a spigot or branch on the saddle to which a service line is connected. The cutting of the hole in the pipe inevitably results in leakage that can be dangerous when the pipe is carrying gas. There are constructions of cutter that attend to the question of leakage at the point that a hole is cut but which still have a leakage problem at the point that the cutter is withdrawn and before a cap is applied to the stem. The object of the invention is to eliminate this problem, which objective is met by a cutter construction comprising a cylindrical blade, a threaded body portion attached to the blade, and there being an integral first length of rod or tube on the body portion to the opposite side of the cylindrical blade portion together with a second length of rod or tube extending from and detachably attached to the said first length, the junction between the said first and second lengths serving as a visual indicator means. Thus, once a hole in the pipe has been cut the said second length maintains its contact with a sealing ring in the stem during the retraction of the cutler until the visual indicator confirms that the cutter has been fully withdrawn following which the exposed second length is removed without the aid of additional tooling with the seal maintained against the first length of rod or tube, the fitting of the cap providing additional security against leakage.
GB9904753A 1996-09-11 1997-09-10 Cutters Withdrawn GB2336189A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9904753A GB2336189A (en) 1996-09-11 1997-09-10 Cutters

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GBGB9618980.8A GB9618980D0 (en) 1996-09-11 1996-09-11 Cutters
PCT/GB1997/002432 WO1998011373A2 (en) 1996-09-11 1997-09-10 Cutters
GB9904753A GB2336189A (en) 1996-09-11 1997-09-10 Cutters

Publications (2)

Publication Number Publication Date
GB9904753D0 GB9904753D0 (en) 1999-04-21
GB2336189A true GB2336189A (en) 1999-10-13

Family

ID=26310020

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9904753A Withdrawn GB2336189A (en) 1996-09-11 1997-09-10 Cutters

Country Status (1)

Country Link
GB (1) GB2336189A (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB837399A (en) * 1957-07-31 1960-06-15 Wavin Bv Improvements in or relating to connections to pipe lines
US3176708A (en) * 1962-12-06 1965-04-06 Du Pont Tapping and valve assembly for plastic pipe
GB1220973A (en) * 1968-10-24 1971-01-27 Edward Barber And Company Ltd Improvements in and relating to ferrules for fitting a branch to a fluid-carrying pipe
US4076038A (en) * 1976-01-05 1978-02-28 Phillips Petroleum Company Tapping tee cutter having relieved sidewall

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB837399A (en) * 1957-07-31 1960-06-15 Wavin Bv Improvements in or relating to connections to pipe lines
US3176708A (en) * 1962-12-06 1965-04-06 Du Pont Tapping and valve assembly for plastic pipe
GB1220973A (en) * 1968-10-24 1971-01-27 Edward Barber And Company Ltd Improvements in and relating to ferrules for fitting a branch to a fluid-carrying pipe
US4076038A (en) * 1976-01-05 1978-02-28 Phillips Petroleum Company Tapping tee cutter having relieved sidewall

Also Published As

Publication number Publication date
GB9904753D0 (en) 1999-04-21

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)