The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 10, 2024
Filed:
Oct. 09, 2023
Milwaukee Electric Tool Corporation, Brookfield, WI (US);
Kyle Greunke, Auborndale, WI (US);
Andrew D. Van Hoorn, Menomonee Falls, WI (US);
Kevin A. McLachlan, Brookfield, WI (US);
Julia C. Marsh, Milwaukee, WI (US);
Mauricio Builes Zapata, Wauwatosa, WI (US);
Daryl S. Richards, Sussex, WI (US);
Beth E. Cholst, Wauwatosa, WI (US);
Jeffery D. Spraggon, Pewaukee, WI (US);
Milwaukee Electric Tool Corporation, Brookfield, WI (US);
Abstract
A rotary hammer includes a motor and a spindle coupled to the motor for receiving torque from the motor. The spindle has an adjustable rotation speed. A reciprocation mechanism is operable to create a variable pressure air spring within the spindle and includes a piston configured to reciprocate within the spindle in response to receiving torque from the motor. The piston has an adjustable reciprocation frequency. A striker is selectively reciprocable within the spindle in response to reciprocation of the piston. A first transmission is transfers torque from the motor to the spindle and a second transmission is transfers torque from the motor to the reciprocation mechanism. The reciprocation frequency of the piston is adjustable independent of the rotation speed of the spindle. The rotation speed of the spindle is adjustable independent of the reciprocation frequency of the piston. At least one of the transmissions is a multi-speed transmission.