Canadian Patents Database / Patent 2541136 Summary

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(12) Patent: (11) CA 2541136
(54) English Title: CONCAVE HELIX IMPELLERS PROPULSION SYSTEM
(54) French Title: SYSTEME DE PROPULSION D'HELICE CONCAVE
(51) International Patent Classification (IPC):
  • B63H 1/14 (2006.01)
(72) Inventors (Country):
  • TUCKER, KEITH (Canada)
(73) Owners (Country):
  • TUCKER, KEITH (Canada)
(71) Applicants (Country):
  • TUCKER, KEITH (Canada)
(74) Agent: MOFFAT & CO.
(45) Issued: 2013-01-22
(22) Filed Date: 2006-03-28
(41) Open to Public Inspection: 2007-09-28
Examination requested: 2011-03-09
(30) Availability of licence: N/A
(30) Language of filing: English

English Abstract




A propeller comprising two or more blades extending radially outwardly from a
hub, each
blade having a continuously concave profile along its axial depth, and
extending helically
about the hub.


French Abstract

Une hélice comprenant deux pales ou plus s'étendant radialement vers l'extérieur à partir d'un moyeu, chaque pale ayant un profil concave de manière continue le long de sa profondeur axiale, et s'étendant de manière hélicoïdale autour du moyeu.


Note: Claims are shown in the official language in which they were submitted.



WE CLAIM:


1. A propeller comprising two or more blades extending radially outwardly from
a hub,
each blade having a continuously concave profile along its axial depth, and
extending
helically about said hub.

2. A propeller as claimed in claim 1, including a plurality of said blades
regularly spaced
around a said hub.

3. A propeller as claimed in claim 2, wherein each said helix extends around
said hub
by

Image where x is the number of blades plus disc ratio spacing intervals in a
said
propeller.

4. A propeller as claimed in claim 3, wherein the concave profile of a said
blade defines
an are that is 180° or less.

5. A propeller as claimed in claim 4, wherein the apex of both the leading and
trailing
edges are further from the hub than the radius centre of said edges.

6. A propeller as claimed in any one of claims 1 to 5, wherein said propeller
is provided
with a cylindrical perimeter shroud integrally connected to the outer edges of
the blades.

6


A single figure which represents the drawing illustrating the invention.

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Admin Status

Title Date
(22) Filed 2006-03-28
(41) Open to Public Inspection 2007-09-28
Examination Requested 2011-03-09
(45) Issued 2013-01-22

Maintenance Fee

Description Date Amount
Last Payment 2017-03-22 $125.00
Next Payment if small entity fee 2018-03-28 $125.00
Next Payment if standard fee 2018-03-28 $250.00

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

  • the reinstatement fee set out in Item 7 of Schedule II of the Patent Rules;
  • the late payment fee set out in Item 22.1 of Schedule II of the Patent Rules; or
  • the additional fee for late payment set out in Items 31 and 32 of Schedule II of the Patent Rules.

Payment History

Fee Type Anniversary Year Due Date Amount Paid Paid Date
Filing $200.00 2006-03-28
Maintenance Fee - Application - New Act 2 2008-03-28 $50.00 2008-03-13
Maintenance Fee - Application - New Act 3 2009-03-30 $50.00 2009-03-23
Maintenance Fee - Application - New Act 4 2010-03-29 $50.00 2010-02-05
Request for Examination $400.00 2011-03-09
Maintenance Fee - Application - New Act 5 2011-03-28 $100.00 2011-03-11
Maintenance Fee - Application - New Act 6 2012-03-28 $100.00 2012-02-06
Final $150.00 2012-11-01
Maintenance Fee - Patent - New Act 7 2013-03-28 $100.00 2013-02-28
Maintenance Fee - Patent - New Act 8 2014-03-28 $100.00 2014-03-06
Maintenance Fee - Patent - New Act 9 2015-03-30 $100.00 2015-03-11
Maintenance Fee - Patent - New Act 10 2016-03-29 $125.00 2016-03-10
Maintenance Fee - Patent - New Act 11 2017-03-28 $125.00 2017-03-22

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Document
Description
Date
(yyyy-mm-dd)
Number of pages Size of Image (KB)
Abstract 2006-03-28 1 6
Description 2006-03-28 5 209
Claims 2006-03-28 1 22
Drawings 2006-03-28 9 319
Representative Drawing 2007-09-05 1 11
Cover Page 2007-09-21 1 31
Abstract 2006-05-12 1 6
Description 2006-05-12 5 196
Claims 2006-05-12 1 22
Drawings 2011-02-23 6 82
Drawings 2012-01-26 6 96
Description 2012-05-14 6 222
Description 2012-08-21 6 227
Representative Drawing 2013-01-16 1 8
Cover Page 2013-01-04 1 27
Prosecution-Amendment 2006-05-12 9 265
Fees 2008-03-13 1 54
Fees 2009-03-23 1 60
Fees 2010-02-05 1 47
Prosecution-Amendment 2011-02-23 7 117
Prosecution-Amendment 2011-03-09 1 46
Fees 2011-03-11 1 46
Prosecution-Amendment 2012-01-26 2 44
Prosecution-Amendment 2012-01-31 1 18
Prosecution-Amendment 2012-02-15 2 70
Prosecution-Amendment 2012-01-26 10 168
Fees 2012-02-06 1 45
Prosecution-Amendment 2012-05-14 5 171
Correspondence 2012-05-23 1 17
Prosecution-Amendment 2012-08-21 2 88
Correspondence 2012-11-01 1 45
Fees 2013-02-28 1 44
Fees 2014-03-06 1 55
Fees 2016-03-10 1 59
Fees 2015-03-11 1 59
Fees 2017-03-22 1 59