US Patent: 514,477
|
Wrench
|
Patentee:
|
|
John U. Kraft (exact or similar names) - Milwaukee, WI |
Manufacturer: |
Not known to have been produced |
|
Patent Dates:
|
Applied: |
Oct. 27, 1893 |
Granted: |
Feb. 13, 1894 |
Patent Pictures:
|
|
John U. Kraft patent February 13, 1894 |
USPTO (New site tip) Google Patents
Report data errors or omissions to steward
Stan Schulz
|
Description: |
The central internal shaft has eccentric cam action to force surrounding rings outward against the interior face of a barrel bung bushing. |
|