US Patent: 389,899
|
Pipe Wrench
|
Patentee:
|
|
Daniel R. Porter (exact or similar names) - Chelsea, MA |
|
Patent Dates:
|
Applied: |
Sep. 08, 1887 |
Granted: |
Sep. 25, 1888 |
Patent Pictures:
[
1 | 2
]
|
|
Daniel R. Porter Patent. September 25, 1888 |
USPTO (New site tip) Google Patents
Report data errors or omissions to steward
Stan Schulz
|
Description: |
A rack on the main bar, a tooth at the base of the adjustable jaw, and two mountings with compression springs are the major features of this quick-adjusting pipe wrench. Known examples marked only with the patent date, and have leaf springs instead of the compression coil springs shown in the patent drawings.
Corresponding Canadian patent CA-27,657 and subsequent foreign patents ( Canadian patent CA-30,994 and British patent GB-188901609 ) provide suggestions for intermediate or alternate manufacturers. |
|