Drill steel idler guide
Patent 3951470 Issued on April 20, 1976. Estimated Expiration Date: 
April 20, 1993. 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.
April 20, 1993. 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 2122150 2248160 3301102 3833070 InventorAssigneeApplicationNo. 573660 filed on 05/01/1975US Classes:384/29, Cylindrical outer race175/220WITH ABOVE-GROUND GUIDE FOR RELATIVELY ADVANCING TOOLExaminersPrimary: Wood, M. H. Jr.Assistant: Church, Gene A. Attorney, Agent or FirmAbstractA drill steel idler guide having an internal sleeve rotatably supported in a base by means of ball bearings fitting in opposed annular grooves in the sleeve and base, said sleeve having a bore through which a drill steel can slidably fit. Means is provided for directing pressure air through the base and into an annular space between the base and the sleeve. | |
