Combination depth gauge and level for a drill
Patent 4281949 Issued on August 4, 1981. Estimated Expiration Date: 
August 6, 1999. 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.
August 6, 1999. 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 1590643 2831376 3077129 3550481 3707043 3746460 Depth stop for a drilling machine Patent #: 4113404 InventorApplicationNo. 06/063744 filed on 08/06/1979US Classes:408/241R, MISCELLANEOUS408/112With means to bias tool away from workExaminersPrimary: Hinson, Harrison L.Attorney, Agent or FirmInternational ClassesB23B 49/00 (20060101)B25H 1/00 (20060101) AbstractAbstract disclosed herein is a combination depth gauge and level for a drill characterized in that a plunger mechanism is attached to the drill by means of a band type clamp. Overlying the plunger, there is provided a ruler capable of sliding within the trackway to extend out beyond the drill and bit so that the depth of a hole to be drilled can be accurately gauged. The plunger mechanism includes a casing having a spring disposed therein and the plunger is biased against the spring and has a terminal portion preferably in the shape of a cross. In use and operation, the plunger is depressed against the surface upon which the drilling is to be done, and therefor the correct angle of the drilled hole can be assured. Once the plunger has been depressed up to the length of the ruler as it has been extended beyond the drill, the depth of the hole thus drilled can be accurately determined and controlled. | |
