CA2019897A1 - Tightener - Google Patents

Tightener

Info

Publication number
CA2019897A1
CA2019897A1 CA2019897A CA2019897A CA2019897A1 CA 2019897 A1 CA2019897 A1 CA 2019897A1 CA 2019897 A CA2019897 A CA 2019897A CA 2019897 A CA2019897 A CA 2019897A CA 2019897 A1 CA2019897 A1 CA 2019897A1
Authority
CA
Canada
Prior art keywords
arms
pivotally connected
cylinder
tightener
encircles
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.)
Granted
Application number
CA2019897A
Other languages
French (fr)
Other versions
CA2019897C (en
Inventor
Donald D. Savard
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.)
Enbridge Pipelines Inc/pipelines Enbridge Inc
Original Assignee
Interprovincial Pipe Line Co
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
Application filed by Interprovincial Pipe Line Co filed Critical Interprovincial Pipe Line Co
Priority to CA002019897A priority Critical patent/CA2019897C/en
Publication of CA2019897A1 publication Critical patent/CA2019897A1/en
Application granted granted Critical
Publication of CA2019897C publication Critical patent/CA2019897C/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/18—Appliances for use in repairing pipes

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Clamps And Clips (AREA)

Abstract

The tightener comprises a scissor clamp having first and second arms pivotally connected at their upper ends. At their lower ends, the arms are pivotally connected with the ends of a loop of chain that encircles a pair of semi-circular steel shells encircling a pipeline. The rod of a cylinder is pivotally connected to move the front arm toward the rear arm. The cylinder is positioned to operate generally perpendicularly relative to the arms.
CA002019897A 1990-06-26 1990-06-26 Tightener Expired - Fee Related CA2019897C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA002019897A CA2019897C (en) 1990-06-26 1990-06-26 Tightener

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA002019897A CA2019897C (en) 1990-06-26 1990-06-26 Tightener

Publications (2)

Publication Number Publication Date
CA2019897A1 true CA2019897A1 (en) 1991-12-26
CA2019897C CA2019897C (en) 1996-02-06

Family

ID=4145344

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002019897A Expired - Fee Related CA2019897C (en) 1990-06-26 1990-06-26 Tightener

Country Status (1)

Country Link
CA (1) CA2019897C (en)

Also Published As

Publication number Publication date
CA2019897C (en) 1996-02-06

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed