Keyless chuck gripping device
Patent 4460296 Issued on July 17, 1984. Estimated Expiration Date: 
July 17, 2001. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
July 17, 2001. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 193899 2003983 2023975 Chuck jaw operating and closing device Keyless chuck Keyless chucking system Patent #: 4317578 InventorApplicationNo. 06/270246 filed on 06/04/1981US Classes:408/124, MEANS TO DRIVE TOOL279/134, SEPARATE CHUCK-ACTUATING POWER SOURCE279/62, Conical sleeve279/902, KEYLESS TYPE SOCKET408/239R, With tool-retaining means408/241R, MISCELLANEOUS81/16CHUCK KEYExaminersPrimary: Yost, Frank T.Assistant: Phan, Hien H. Attorney, Agent or FirmInternational ClassesB25B 33/00 (20060101)B23B 31/12 (20060101) AbstractA keyless chuck gripping device for opening or closing jaws of a chuck of a rotary tool without using a chuck key includes a first portion having a surface extending at least partially around an outer surface of a chuck locking drum. The first portion is attached to a forward housing portion of the rotary tool or the outer surface of the chuck locking drum. A second portion connected to the first portion is urged into frictional or lock engagement with the unattached portion of the rotary tool where manual actuation alters rotational speed of the chuck locking drum relative to the speed of the rotary tool shaft. The second portion maintains the chuck locking drum in a stationary position while the shaft is driven by the motor, enabling the chuck locking drum to turn the chuck jaws in forward or reverse direction. | |
