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(12) Patent: | (11) CA 2170653 |
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(54) English Title: | THREAD LOOSENING DEVICE |
(54) French Title: | DISPOSITIF DE DEGRIPPAGE D'UN RACCORD FILETE |
Status: | Term Expired - Post Grant Beyond Limit |
(51) International Patent Classification (IPC): |
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(72) Inventors : |
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(73) Owners : |
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(71) Applicants : |
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(74) Agent: | |
(74) Associate agent: | |
(45) Issued: | 2001-03-27 |
(22) Filed Date: | 1996-02-29 |
(41) Open to Public Inspection: | 1997-08-30 |
Examination requested: | 1998-01-30 |
Availability of licence: | Yes |
Dedicated to the Public: | N/A |
(25) Language of filing: | English |
Patent Cooperation Treaty (PCT): | No |
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(30) Application Priority Data: | None |
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A thread loosening device adaptable to a pair of pipe wrenches or the like that comprises a
threaded rod in threaded engagement to a first housing and a second housing, thehousings being axially moveable along the longitudinal axis of the threaded rod. The
threaded rod has a plurality of individual threads with the same diameter and pitch as the
threads in the housings. Anchor members are affixed to the housings for pivotally securing
the handles of the pipe wrenches. End caps are affixed to the opposite ends of the
threaded rod, the end caps having a hexagon surface for co-operation with a mechanical
wrench or socket. The rotation of the end caps forces the housings to move in opposite
directions along the threaded rod thereby creating an opposing movement of the wrench
handles and subsequent wrench jaw movements relative to each other. The clockwise and
counter-clockwise rotation of the wrench jaws provides the torque to loosen tight threads
and thread couplings.
Dispositif de desserrage de filetage conçu pour une paire de clés à tube ou d'autres outils semblables comprenant une tige filetée vissée dans un premier et dans un deuxième boîtier, lesquels peuvent effectuer un déplacement axial le long de l'axe longitudinal de la tige. La tige filetée possède une multitude de filets individuels ayant le même diamètre et le même pas de filetage que ceux des boîtiers. Les boîtiers sont munis de dispositifs d'ancrage pour empêcher les manches des clés à tube de pivoter. Des capuchons d'extrémité, dont la surface hexagonale est conçue pour fonctionner avec des clés et des douilles mécaniques, sont fixés aux extrémités opposées de la tige filetée. Le mouvement de rotation des capuchons d'extrémité force les boîtiers à se déplacer dans des directions opposées le long de la tige, ce qui fait bouger les manches des clés, et par conséquent leurs mors, dans des directions opposées l'un par rapport à l'autre. Le mouvement des mors dans le sens des aiguilles d'une montre et dans le sens inverse fournit suffisamment de couple de serrage pour desserrer des filetages serrés et des raccords filetés.
Note: Claims are shown in the official language in which they were submitted.
Note: Descriptions are shown in the official language in which they were submitted.
2024-08-01:As part of the Next Generation Patents (NGP) transition, the Canadian Patents Database (CPD) now contains a more detailed Event History, which replicates the Event Log of our new back-office solution.
Please note that "Inactive:" events refers to events no longer in use in our new back-office solution.
For a clearer understanding of the status of the application/patent presented on this page, the site Disclaimer , as well as the definitions for Patent , Event History , Maintenance Fee and Payment History should be consulted.
Description | Date |
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Inactive: Expired (new Act pat) | 2016-02-29 |
Maintenance Request Received | 2015-01-19 |
Maintenance Request Received | 2014-01-14 |
Maintenance Request Received | 2013-01-18 |
Grant by Issuance | 2001-03-27 |
Inactive: Cover page published | 2001-03-26 |
Pre-grant | 2000-12-21 |
Publish Open to Licence Request | 2000-12-21 |
Inactive: Final fee received | 2000-12-21 |
Letter Sent | 2000-12-01 |
Notice of Allowance is Issued | 2000-12-01 |
Notice of Allowance is Issued | 2000-12-01 |
Inactive: Approved for allowance (AFA) | 2000-11-15 |
Letter Sent | 2000-04-11 |
Reinstatement Requirements Deemed Compliant for All Abandonment Reasons | 2000-04-03 |
Inactive: Office letter | 2000-03-28 |
Change of Address Requirements Determined Compliant | 2000-03-28 |
Inactive: Office letter | 2000-03-16 |
Deemed Abandoned - Failure to Respond to Maintenance Fee Notice | 2000-02-29 |
Inactive: Office letter | 1999-04-08 |
Change of Address Requirements Determined Compliant | 1999-04-08 |
Revocation of Agent Request | 1999-03-02 |
Change of Address or Method of Correspondence Request Received | 1998-10-28 |
Letter Sent | 1998-09-14 |
Inactive: Adhoc Request Documented | 1998-09-14 |
Inactive: Status info is complete as of Log entry date | 1998-07-22 |
Letter Sent | 1998-07-22 |
Inactive: Application prosecuted on TS as of Log entry date | 1998-07-22 |
Request for Examination Requirements Determined Compliant | 1998-01-30 |
All Requirements for Examination Determined Compliant | 1998-01-30 |
Application Published (Open to Public Inspection) | 1997-08-30 |
Small Entity Declaration Determined Compliant | 1996-02-29 |
Abandonment Date | Reason | Reinstatement Date |
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2000-02-29 |
The last payment was received on 2001-01-11
Note : If the full payment has not been received on or before the date indicated, a further fee may be required which may be one of the following
Please refer to the CIPO Patent Fees web page to see all current fee amounts.
Note: Records showing the ownership history in alphabetical order.
Current Owners on Record |
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JAMES SMITH |
Past Owners on Record |
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None |