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(12) Patent Application: | (11) CA 2126262 |
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(54) English Title: | SHAFT MOUNTED AND IMPELLER MOUNTED PUMPING SLEEVE AND BUSHING |
(54) French Title: | DISPOSITIF DE CIRCULATION D'EAU DE REFROIDISSEMENT A PRESSE-ETOUPE MONTE SUR L'ARBRE D'ENTRAINEMENT ET MU PAR LA ROUE DE LA POMPE |
Status: | Deemed Abandoned and Beyond the Period of Reinstatement - Pending Response to Notice of Disregarded Communication |
(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: | |
(22) Filed Date: | 1994-06-20 |
(41) Open to Public Inspection: | 1995-12-21 |
Availability of licence: | N/A |
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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The present invention relates to a Shaft-Mounted and Impeller-
Mounted Pumping Sleeve and Bushing. Various devices have been
previously proposed for relieving the pressure inside the stuffing
box of a pump. In practice, however, these devices have proven to
be inefficient and expensive to install. Such devices use a
centrifugal force to displace the fluid by the use of a repeller.
They do not perform the following functions:
A. circulate the fluid through the stuffing box
B. regulate pressure in the stuffing box
C. allow for any impeller adjustment as the
impeller wears
It is an objective of the present invention to avoid or minimise
one or more of the above mentioned disadvantages.
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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Description | Date |
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Revocation of Agent Requirements Determined Compliant | 2020-09-01 |
Inactive: IPC from MCD | 2006-03-11 |
Inactive: IPC from MCD | 2006-03-11 |
Inactive: IPC from MCD | 2006-03-11 |
Inactive: IPC from MCD | 2006-03-11 |
Inactive: IPC from MCD | 2006-03-11 |
Time Limit for Reversal Expired | 1999-06-21 |
Application Not Reinstated by Deadline | 1999-06-21 |
Deemed Abandoned - Failure to Respond to Maintenance Fee Notice | 1998-06-22 |
Application Published (Open to Public Inspection) | 1995-12-21 |
Abandonment Date | Reason | Reinstatement Date |
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1998-06-22 |
The last payment was received on 1997-06-09
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
Patent fees are adjusted on the 1st of January every year. The amounts above are the current amounts if received by December 31 of the current year.
Please refer to the CIPO
Patent Fees
web page to see all current fee amounts.
Fee Type | Anniversary Year | Due Date | Paid Date |
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MF (application, 3rd anniv.) - small | 03 | 1997-06-20 | 1997-06-09 |
Note: Records showing the ownership history in alphabetical order.
Current Owners on Record |
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THOMAS WILLIAM RAMSAY |
Past Owners on Record |
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None |