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(12) Patent: | (11) CA 2802876 |
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(54) English Title: | TOWER-STYLE DOUBLE CYLINDER HYDRAULIC OIL PUMPING UNIT |
(54) French Title: | MODULE DE POMPAGE DE PETROLE HYDRAULIQUE A DOUBLE CYLINDRE DE STYLE TOUR |
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: | NEXUS LAW GROUP LLP |
(74) Associate agent: | |
(45) Issued: | 2015-05-12 |
(22) Filed Date: | 2012-12-10 |
(41) Open to Public Inspection: | 2014-02-02 |
Examination requested: | 2012-11-19 |
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: | ||||||
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A tower-style double cylinder hydraulic pumping unit has a first cylinder and
a
second cylinder. The first cylinder is connected by a cable linkage to the
sucker rod, such
that expansion of the first cylinder serves to lift a sucker rod. The second
cylinder is
connected by a cable linkage to a counterweight, such that expansion of the
second cylinder
serves to lift the counterweight. A pump alternatively pumps hydraulic fluid
into the first
cylinder and then the second cylinder to create reciprocating movement of the
sucker rod and
the counterweight. When the first cylinder expands the second cylinder
retracts to pull the
sucker rod up, while the counterweight moves down. When the second cylinder
expands the
first cylinder retracts to pull the counterweight up, while the sucker rod
moves down.
Une unité de pompage hydraulique à double cylindre de type tour comporte un premier et un deuxième cylindre. Le premier cylindre est relié par une timonerie à câbles à une tige de pompage, de manière que la dilatation du premier cylindre serve à soulever la tige de pompage. Le deuxième cylindre est relié par une timonerie à câbles à un contrepoids, de manière que la dilatation du deuxième cylindre serve à soulever le contrepoids. Une pompe pompe du fluide hydraulique de manière alternée dans le premier cylindre, puis dans le deuxième cylindre pour créer un mouvement de va-et-vient de la tige de pompage et du contrepoids. Lorsque le premier cylindre se dilate, le deuxième cylindre se rétracte pour tirer la tige de pompage vers le haut, alors que le contrepoids se déplace vers le bas. Lorsque le deuxième cylindre se dilate, le premier cylindre se rétracte pour tirer le contrepoids vers le haut, alors que la tige de pompage se déplace vers le bas.
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.
Sorry, the representative drawing for patent document number 2802876 was not found.
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Description | Date |
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Revocation of Agent Requirements Determined Compliant | 2022-01-12 |
Appointment of Agent Requirements Determined Compliant | 2022-01-12 |
Time Limit for Reversal Expired | 2019-12-10 |
Common Representative Appointed | 2019-10-30 |
Common Representative Appointed | 2019-10-30 |
Letter Sent | 2018-12-10 |
Grant by Issuance | 2015-05-12 |
Inactive: Cover page published | 2015-05-11 |
Pre-grant | 2015-02-11 |
Inactive: Final fee received | 2015-02-11 |
Notice of Allowance is Issued | 2015-01-22 |
Letter Sent | 2015-01-22 |
Notice of Allowance is Issued | 2015-01-22 |
Inactive: Q2 passed | 2015-01-15 |
Inactive: Approved for allowance (AFA) | 2015-01-15 |
Amendment Received - Voluntary Amendment | 2014-10-06 |
Inactive: Filing certificate - RFE (bilingual) | 2014-04-25 |
Correct Applicant Requirements Determined Compliant | 2014-04-25 |
Inactive: S.30(2) Rules - Examiner requisition | 2014-04-14 |
Inactive: Report - QC passed | 2014-03-31 |
Inactive: Cover page published | 2014-02-02 |
Application Published (Open to Public Inspection) | 2014-02-02 |
Inactive: Applicant deleted | 2013-12-03 |
Inactive: Applicant deleted | 2013-12-03 |
Inactive: Applicant deleted | 2013-12-03 |
Inactive: Acknowledgment of s.8 Act correction | 2013-12-03 |
Correction Request for a Granted Patent | 2013-11-19 |
Correction Request for a Granted Patent | 2013-11-18 |
Inactive: Office letter | 2013-08-22 |
Change of Address Requirements Determined Compliant | 2013-08-06 |
Appointment of Agent Requirements Determined Compliant | 2013-08-06 |
Revocation of Agent Requirements Determined Compliant | 2013-08-06 |
Inactive: Office letter | 2013-08-06 |
Inactive: Office letter | 2013-08-06 |
Correction Request for a Granted Patent | 2013-07-23 |
Revocation of Agent Request | 2013-07-23 |
Appointment of Agent Request | 2013-07-23 |
Change of Address or Method of Correspondence Request Received | 2013-07-10 |
Inactive: First IPC assigned | 2013-03-06 |
Inactive: IPC assigned | 2013-03-06 |
Inactive: IPC assigned | 2013-02-27 |
Inactive: Office letter | 2013-02-12 |
Reinstatement Requirements Deemed Compliant for All Abandonment Reasons | 2013-02-12 |
Letter Sent | 2013-02-04 |
Application Received - Regular National | 2013-02-04 |
Inactive: Filing certificate - RFE (English) | 2013-02-04 |
Filing Requirements Determined Compliant | 2013-02-04 |
Inactive: Office letter | 2013-02-04 |
Small Entity Declaration Determined Compliant | 2012-12-10 |
All Requirements for Examination Determined Compliant | 2012-11-19 |
Request for Examination Requirements Determined Compliant | 2012-11-19 |
Small Entity Declaration Determined Compliant | 2012-11-19 |
There is no abandonment history.
The last payment was received on 2014-08-26
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.
Fee Type | Anniversary Year | Due Date | Paid Date |
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Request for examination - small | 2012-11-19 | ||
Application fee - small | 2012-11-19 | ||
2013-11-18 | |||
MF (application, 2nd anniv.) - small | 02 | 2014-12-10 | 2014-08-26 |
Final fee - small | 2015-02-11 | ||
MF (patent, 3rd anniv.) - small | 2015-12-10 | 2015-11-12 | |
MF (patent, 4th anniv.) - small | 2016-12-12 | 2016-12-12 | |
MF (patent, 5th anniv.) - small | 2017-12-11 | 2017-12-11 |
Note: Records showing the ownership history in alphabetical order.
Current Owners on Record |
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VAN PACIFIC CONSULTING LTD. |
SHUANG ZHOU |
Past Owners on Record |
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GUOFENG ZHOU |