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(12) Patent: | (11) CA 1095251 |
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(21) Application Number: | 1095251 |
(54) English Title: | BUTTON GRINDING |
(54) French Title: | TRADUCTION NON-DISPONIBLE |
Status: | Term Expired - Post Grant |
(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: | SMART & BIGGAR LP |
(74) Associate agent: | |
(45) Issued: | 1981-02-10 |
(22) Filed Date: | 1978-12-05 |
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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ABSTRACT OF DISCLOSURE
Buttons, e.g. on button bits, are ground by means of a concavely
peripherally profiled grinding wheel. The wheel is rotated by
matched motors to either side of it and the assembly of wheel
and rotation motors is carried by a clevis. The shank of the
clevis is chucked to a machine such as a rotary drilling machine.
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 1095251 was not found.
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Description | Date |
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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 |
Inactive: IPC from MCD | 2006-03-11 |
Inactive: Expired (old Act Patent) latest possible expiry date | 1998-02-10 |
Grant by Issuance | 1981-02-10 |
There is no abandonment history.
Note: Records showing the ownership history in alphabetical order.
Current Owners on Record |
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BOART INTERNATIONAL LIMITED |
Past Owners on Record |
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JAMES MCENERY |