Patrick-McDermott manual impact wrench

[Farmall 1066]

Got this at closing auction for local garage and towing company, in business since 1955.
Marked Patrick-McDermott Co, Los Angeles CA.
Never seen anything like it.
It’s 3/4 drive and original owner told me he changed a lot of truck tires with it, back in the day.

 

[Farmall 1066]

Here’s a close up of the mechanism.
Swing big weighted lever which screws itself into engagement with a dog.

 

[Farmall 1066]

Bumping this in hope of finding some info.

 

[Made in USA]

from page 119 of June 1946 Popular Mechanics:

https://books.google.com/books?id=cOEDAAAAMBAJ&pg=PA8&lpg=PA8&dq=%22Patrick-McDermott+Co%22&source=bl&ots=B6f2bAPPFt&sig=ACfU3U2UID9o_6gCDlb7S8yIRSNG9fqxbQ&hl=en&sa=X&ved=2ahUKEwj-u6DMlqDqAhWzHzQIHU4eCJY4ChDoATAAegQIChAB#v=onepage&q=%22Patrick-McDermott%20Co%22&f=false

A bit more info on the co.:
https://www.worthpoint.com/worthopedia/vtg-1944-los-angeles-aviation-aero-1823167453

 

[Farmall 1066]

Wow....Thank you! I’ve searched all over and that’s more info than I’ve found!
No intention of selling mine...that’s thing works amazingly well.

 

[Lwel9226]

I have a wrench very simular to that.... I gave $20.00 for it at a yard sale a few years ago with a set of 3/4 drive sockets....
A friend of mine had one many years ago so I knew what it was....
I always assumed they were military....
Never knew a name for it, just called it a slugger wrench.....

LynnW

 

[humber2]

Just a quick flick to engage the spinning handle?

Has to work either direction for RH & LH lug nuts.