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(12) Patent: | (11) CA 2053498 |
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(54) English Title: | CHAINSAW FOR LUMBER MAKING |
(54) French Title: | SCIE A CHAINE POUR DECOUPAGE EN PLANCHES |
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 : | |
(74) Agent: | |
(74) Associate agent: | |
(45) Issued: | 1995-05-23 |
(22) Filed Date: | 1991-10-15 |
(41) Open to Public Inspection: | 1993-04-16 |
Examination requested: | 1992-10-21 |
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 chainsaw consists essentialy of a motor driven chain
with cutting teeth. Chainsaws are widely used for
felling trees and for cutting long pieces of wood into
shorter pieces. There are devices to guide a chainsaw
axially along the grain, to make lumber from trees. All
of these devices cut across the end grain of the wood.
It is well known that cutting across end grain is slow
and energy consuming. The sawdust produced is a powder.
It is also known that a chainsaw held with the cutting
edge parallel to the grain cuts a great deal faster,
tearing out thin strips of wood instead of fine sawdust.
This invention is a means for presenting the cutting
chain substantially parallel to the wood grain, and
guiding it so as to cut flat surfaces of any length.
Tests have shown that my invention cuts lumber from
three to ten times, (depending on the type of wood),
faster than previously available chainsaw devices of
equal power. This is achieved by a novel bar of
approximately triangular shape carrying the cutting
chain, and means to guide the bar to form a flat surface
as long as any log. The novel bar and guide apparatus
are described in the following specification.
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.
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Description | Date |
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Inactive: IPC from MCD | 2006-03-11 |
Time Limit for Reversal Expired | 2005-10-17 |
Inactive: Adhoc Request Documented | 2005-07-18 |
Inactive: Payment - Insufficient fee | 2004-11-09 |
Inactive: Reversal of will be deemed expired status | 2004-11-09 |
Inactive: Payment - Insufficient fee | 2004-11-08 |
Inactive: Late MF processed | 2004-10-18 |
Letter Sent | 2004-10-15 |
Letter Sent | 2004-10-15 |
Letter Sent | 2004-10-15 |
Grant by Issuance | 1995-05-23 |
Application Published (Open to Public Inspection) | 1993-04-16 |
All Requirements for Examination Determined Compliant | 1992-10-21 |
Request for Examination Requirements Determined Compliant | 1992-10-21 |
There is no abandonment history.
Fee Type | Anniversary Year | Due Date | Paid Date |
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MF (patent, 6th anniv.) - small | 1997-10-15 | 1997-10-06 | |
MF (patent, 7th anniv.) - small | 1998-10-15 | 1998-10-13 | |
MF (patent, 8th anniv.) - small | 1999-10-15 | 1999-10-04 | |
MF (patent, 9th anniv.) - small | 2000-10-16 | 2000-10-11 | |
MF (patent, 10th anniv.) - small | 2001-10-15 | 2001-08-20 | |
MF (patent, 11th anniv.) - small | 2002-10-15 | 2002-10-09 | |
MF (patent, 12th anniv.) - small | 2003-10-15 | 2003-10-15 |
Note: Records showing the ownership history in alphabetical order.
Current Owners on Record |
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ROBERT STANLEY SPROULE |
Past Owners on Record |
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None |