US 11,982,184 B2
Core drill assembly
Jonathan E. Schmitz, Wauwatosa, WI (US); Terry L. Timmons, Oconomowoc, WI (US); Karly M. Schober, Milwaukee, WI (US); Dane Laitinen, Wauwatosa, WI (US); Andrew Medeiros-Nicholson, Brookfield, WI (US); Paul W. Eiche, Oconomowoc, WI (US); Casey A. Ketterhagen, Hartland, WI (US); Sara Burch, Milwaukee, WI (US); and Guo Qian Qin, Dongguan (CN)
Assigned to MILWAUKEE ELECTRIC TOOL CORPORATION, Brookfield, WI (US)
Filed by MILWAUKEE ELECTRIC TOOL CORPORATION, Brookfield, WI (US)
Filed on Nov. 11, 2021, as Appl. No. 17/524,605.
Claims priority of provisional application 63/113,505, filed on Nov. 13, 2020.
Claims priority of application No. 202120373677.5 (CN), filed on Feb. 10, 2021.
Prior Publication US 2022/0154534 A1, May 19, 2022
Int. Cl. E21B 7/26 (2006.01); B25H 1/00 (2006.01); E21B 3/02 (2006.01); E21B 7/02 (2006.01)
CPC E21B 7/027 (2013.01) [B25H 1/0042 (2013.01); E21B 3/02 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A core drill comprising:
a housing;
a drive mechanism supported within the housing;
an output shaft coupled to the drive mechanism, the output shaft having a threaded connection to which a core bit is threaded; and
a water jacket surrounding the output shaft above the threaded connection, the water jacket being rotatably coupled to the housing in a tool-free manner, the water jacket having an inlet that can be operably coupled to a water source to supply water to an interior of the output shaft and to a connected core bit.