Tool Talk

Wrench Forum => Wrench Forum => Topic started by: amertrac on June 16, 2013, 04:35:54 AM

Title: cochran wrench
Post by: amertrac on June 16, 2013, 04:35:54 AM

Cochran speednut wrench  patent date may 2 1913  Chicago ill

Title: Re: cochran wrench
Post by: mvwcnews on June 16, 2013, 11:25:47 PM

1916 ( http://www.datamp.org/patents/advance.php?pn=D48996&id=30746&set=5 ). 
The patent & manufacturing history of these "speednut" self adjusting wrenches is very convoluted.