Screwdriver with dual tip
Patent 4488462 Issued on December 18, 1984. Estimated Expiration Date: 
December 18, 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.
December 18, 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 1345708 1501222 2116775 2522996 2546489 3674070 Phillips screwdriver with retractable slotted screw driver blade Patent #: 4328721 InventorApplicationNo. 06/319194 filed on 11/09/1981US Classes:81/439, Including discrete, separately usable inserted portions81/438, Having structure adapting portion or tool for separation81/460Inserted portion having plural, noncollinear blades (e.g., Phillips)ExaminersPrimary: Schmidt, Frederick R.Assistant: Schad, Steven P. Attorney, Agent or FirmInternational ClassB25B 15/00 (20060101)AbstractA screwdriver is provided that can be used for installing and removing either single slot screws or screws having two slots that cross at their centers, i.e., "PHILLIPS" type screws. The screwdriver is provided with a shaft which includes a tip segment having a configuration suited for engagement in the slots of such a cross-slotted screw. An elongated slot is in the tip segment along the length of the shaft. A blade, suited for engagement in the slot of a single slot screw, is slidably mounted in the tip segment slot. When the blade is in a first position extended beyond the end of the shaft tip segment, it can be engaged in the slot of such a single slot screw. When the blade is in a second position retracted or housed within the elongated tip segment slot, the tip segment can be engaged in the slots of such a cross-slotted screw.Field of SearchIncluding discrete, separately usable inserted portionsInserted portion having relatively movable components Inserted portion having plural, noncollinear blades (e.g., Phillips) Having structure adapting portion or tool for separation Combined with or usable as diverse-type wrench Having work engaging and force exerting portion inserted into cavity (e.g., allen wrench, screwdriver) | |
