I once bent the shank on a Danforth Deepset while anchored out in a blow with a wind
change,the anchor held well, but the shank took a nice twist. I was glad it held and bent instead of dragged.
Was curious if the Pat Pend 25 lb CQR was genuine after realizing most have the Pat # and made in Scotland
embossed on the opposite side of the Shank. I think the pat. was granted in 1934 I was wondering if the anchor was maybe much older than it looked or other than a genuine CQR.
Found this url link on pat search of interst of how rule
ind. claim of CQR plow improvement. Patent Login
Attached the pdf for interest in how it was seen in 1987/89 as an improvement on the plow and the test conditions notes were interesting. They made reference to chain being integral to achieving the results but did not specify wt or length of cable/rhode used.