Chuck for tools
Patent 4951955 Issued on August 28, 1990. Estimated Expiration Date: 
May 17, 2009. 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.
May 17, 2009. 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 2684856 Keyless chuck Automatic jaw control for reversible power tool Keyless tool chuck Keyless impacting chuck Keyless chuck for rotary tool Self-actuating keyless chuck Patent #: 4840387 InventorAssigneeApplicationNo. 362433 filed on 05/17/1989US Classes:279/62, Conical sleeve279/60, Obliquely guided reciprocating jaws279/134, SEPARATE CHUCK-ACTUATING POWER SOURCE279/902KEYLESS TYPE SOCKETExaminersPrimary: Howell, Daniel W.Attorney, Agent or FirmInternational ClassB23B 031/10Foreign Application Priority Data1987-10-16 JPAbstractA chuck for a tool according to the present invention incorporates a clutch mechanism (17) between a rotating member (3) and a rotating nut (4). The clutch mechanism intermittently cuts off the transmission of power from the rotating nut to the rotating member, generating an impact force. This impact force increases the amount of force with which a tool (W) such as a drill is fastened and makes release of the tool smooth. | |
