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(12) Patent: | (11) CA 2141021 |
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(54) English Title: | RAIL DE NIVELAGE |
(54) French Title: | LEVELLING RAIL |
Status: | Expired and beyond the Period of Reversal |
(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: | MBM INTELLECTUAL PROPERTY AGENCY |
(74) Associate agent: | |
(45) Issued: | 1997-09-30 |
(22) Filed Date: | 1995-01-24 |
(41) Open to Public Inspection: | 1996-07-25 |
Examination requested: | 1995-10-05 |
Availability of licence: | N/A |
Dedicated to the Public: | N/A |
(25) Language of filing: | French |
Patent Cooperation Treaty (PCT): | No |
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(30) Application Priority Data: | None |
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he quality of air in mine tunnels is a vital element in workers' health. To increase workers' productivity, it is therefore important that the number of machines moving about in the tunnels be reduced to a minimum. Existing graders currently have no access to certain parts of the tunnels, such as the stopes. In addition, the cost of buying and maintaining them is high. Furthermore, existing detachable devices, consisting of a vertical blade attached underneath a machine, are too large for the space available between the front and rear wheels of mining machines, and this space is already in use for other purposes. Moreover, the ground surface in mine tunnels is so rough that such blades would be useless because their height would have to be constantly adjusted. The present invention, consisting of a detachable device that can be attached beneath existing mining machines, eliminates the need for graders in mine tunnels, and increases air quality and workers' productivity. The device facilitates the levelling of areas inaccessible to existing graders because the machines to which it is attached have been designed to reach such areas. Because of its low profile, the invention fits perfectly into the space available below these machines. In addition, the position of its anchorings allows it to adjust automatically to ground conditions. Finally, it requires no mechanical maintenance and it costs less than the graders which are customarily used.
Dans les conduits souterrains miniers, la qualité de l'air est un élément primordial à la santé des travailleurs.
Ainsi, il est important que le nombre de machines y circulant soit réduit au minimum, la productivité des
travailleurs étant augmentée d'autant. Les niveleuses actuellement utilisées n'ont pas accès à certaines parties
de ces conduits, telles que les chantiers. De plus leur coût d'acquisition et d'entretien est dispendieux. D'autre
part, les appareils amovibles actuellement utilisés et fixés en-dessous de la machinerie, consistant en une lame
verticale, sont trop volumineux par rapport à l'espace disponible entre les roues avant et arrières des machines
minières, cet espace étant déjà utilisé à d'autres fins. De plus, la surface du sol desdits conduits étant trop
cahoteuse, une lame y serait inutile puisque sa hauteur devrait sans cesse être ajustée. Ainsi la présente
invention consistant en un appareil amovible fixé en-dessous des machines minières existantes anéantie le
nombre de niveleuse dans lesdits conduits, augmentant la qualité de l'air et la productivité des travailleurs.
Cet appareil fixé sous la machinerie minière facilite le nivelage des endroits inaccessibles aux niveleuses
actuelles, cette machinerie étant déjà conçue pour s'y rendre. Par son profil bas, l'invention cadre parfaitement
à l'espace disponible en-dessous desdites machines. De plus, par la position de ses ancrages, l'invention
s'ajuste automatiquement aux conditions du sol. Enfin, l'appareil exige aucun entretien mécanique et coûte
moins cher que les niveleuses usuelles.
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.
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Please note that "Inactive:" events refers to events no longer in use in our new back-office solution.
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Description | Date |
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Time Limit for Reversal Expired | 2015-01-26 |
Inactive: Adhoc Request Documented | 2014-05-02 |
Letter Sent | 2014-01-24 |
Small Entity Declaration Determined Compliant | 2007-12-11 |
Small Entity Declaration Request Received | 2007-12-11 |
Inactive: IPC from MCD | 2006-03-11 |
Inactive: IPC from MCD | 2006-03-11 |
Inactive: IPC from MCD | 2006-03-11 |
Revocation of Agent Requirements Determined Compliant | 2000-02-02 |
Inactive: Office letter | 2000-02-02 |
Inactive: Office letter | 2000-02-02 |
Appointment of Agent Requirements Determined Compliant | 2000-02-02 |
Revocation of Agent Request | 2000-01-10 |
Appointment of Agent Request | 2000-01-10 |
Inactive: Office letter | 1998-03-26 |
Appointment of Agent Request | 1998-03-09 |
Revocation of Agent Request | 1998-03-09 |
Grant by Issuance | 1997-09-30 |
Inactive: Inventor deleted | 1997-07-25 |
Inactive: Status info is complete as of Log entry date | 1997-07-25 |
Inactive: Application prosecuted on TS as of Log entry date | 1997-07-25 |
Inactive: Applicant deleted | 1997-07-25 |
Inactive: Office letter | 1997-07-14 |
Inactive: Office letter | 1997-07-14 |
Pre-grant | 1997-04-08 |
Notice of Allowance is Issued | 1996-12-31 |
Application Published (Open to Public Inspection) | 1996-07-25 |
Request for Examination Requirements Determined Compliant | 1995-10-05 |
All Requirements for Examination Determined Compliant | 1995-10-05 |
There is no abandonment history.
Fee Type | Anniversary Year | Due Date | Paid Date |
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Final fee - small | 1997-04-08 | ||
MF (patent, 3rd anniv.) - small | 1998-01-26 | 1997-11-03 | |
MF (patent, 4th anniv.) - small | 1999-01-25 | 1998-12-08 | |
MF (patent, 5th anniv.) - small | 2000-01-24 | 2000-01-10 | |
MF (patent, 6th anniv.) - small | 2001-01-24 | 2000-10-04 | |
MF (patent, 7th anniv.) - small | 2002-01-24 | 2002-01-15 | |
MF (patent, 8th anniv.) - small | 2003-01-24 | 2003-01-23 | |
MF (patent, 9th anniv.) - small | 2004-01-26 | 2004-01-12 | |
MF (patent, 10th anniv.) - small | 2005-01-24 | 2005-01-19 | |
MF (patent, 11th anniv.) - small | 2006-01-24 | 2006-01-24 | |
MF (patent, 12th anniv.) - small | 2007-01-24 | 2007-01-23 | |
MF (patent, 13th anniv.) - small | 2008-01-24 | 2007-12-11 | |
MF (patent, 14th anniv.) - small | 2009-01-26 | 2008-12-30 | |
MF (patent, 15th anniv.) - small | 2010-01-25 | 2010-01-13 | |
MF (patent, 16th anniv.) - small | 2011-01-24 | 2011-01-10 | |
MF (patent, 17th anniv.) - small | 2012-01-24 | 2011-12-29 | |
MF (patent, 18th anniv.) - small | 2013-01-24 | 2013-01-07 |
Note: Records showing the ownership history in alphabetical order.
Current Owners on Record |
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TRAHAN INTERNATIONAL LTD. |
Past Owners on Record |
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MICHEL TRAHAN |