CA Patent: CA-55,988
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| Chain Wrench
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Patentees:
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| George Amborn (exact or similar names) - Brooklyn, NY |
| William Joseph Grinden (exact or similar names) - Brooklyn, NY |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Mar. 04, 1897 |
| Granted: |
May 19, 1897 |
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Patent Pictures:
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J.H. Williams & Co. (assignee of G. Amborn and W. J. Grinden) patent May 19, 1897 edited from CANADIAN PATENT OFFICE RECORD |
CIPO Data
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Stan Schulz
Canadian patent no. 55,988 in FLICKR
55,988 in Canadian Patents Database
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Description: |
| The specifications note that "cable chain" is preferable for working with fittings and other irregular forms related to pipe where flat chain is better suited for pipe.
The side plates connect to the handle with dovetails; the bolt's primary function is to keep the jaws in position rather than carrying the strain. The free end of the chain connects to the handle behind the attachment point for the fixed end of the chain to avoid potential for the chain to "lock" on pipe.
Corresponding U.S. patent no. 577,653 was issued February 23, 1897. |
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