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US 4,288,084 AGranted
Chuck collar
AssigneeNone recorded
InventorRobert H. Newberry
Life of this patent
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AssigneeNone recorded
InventorRobert H. Newberry
Estimating the term…
A tubular chuck collar with a plurality of teeth circumferentially arranged around the base thereof to form a toothed track is fitted over the inner cylinder of a conventional chuck assembly in spaced relationship to the outer cylinder of the chuck assembly such that the toothed track of the chuck collar opposes the conventional toothed track on the outer cylinder. A securing means releasably secures the collar to the inner cylinder. The toothed track of the chuck collar includes at least one section oriented at an incline relative to the toothed track on the outer cylinder, whereby a bladed instrument such as a screwdriver may be inserted into the gap between the collar and the outer cylinder to simultaneously engage the teeth in both toothed tracks. The screwdriver so inserted is twisted about its longitudinal axis to simultaneously apply opposing torques to the collar and the outer cylinder. The torque on the collar is transferred through the securing means to the inner cylinder, which is caused to rotate relative to the outer cylinder to open or close the chuck jaws as desired. The chuck collar also includes a slot formed in the side thereof in alignment with one of the conventional chuck key pivot holes in the inner cylinder. A conventional chuck key may be inserted into the pivot hole to engage the teeth in the toothed track on the outer cylinder, and may thereafter be used to operate the chuck jaws in a conventional manner.
Apparatus for operating a chuck assembly having an outer cylinder with a set of teeth circumferentially arranged around one end thereof, an inner cylinder rotatably mounted within the outer cylinder, the inner cylinder having at least one pivot hole formed therein adjacent the set of teeth on the outer cylinder, a jaw mechanism mounted within the inner cylinder and movable between fully open and fully closed positions upon relative rotation of the inner and the outer cylinders, and a torque applicator for providing relative rotation torque between the inner and the outer cylinders, the torque applicator having a pivot pin and a bevel gear which is brought into registry with the set of teeth on the outer cylinder when the pivot pin is inserted into the pivot hole, said apparatus comprising a chuck operating means releasably attachable to the inner cylinder of the chuck assembly for operating the jaw mechanism, said chuck operating means including an annular attachment member shaped to releasably fit over the inner cylinder, said annular attachment member having a plurality of teeth circumferentially arranged around one end thereof, said apparatus also comprising a securing means for fixing said annular attachment member simultaneously against either clockwise or counter-clockwise rotation relative to the inner cylinder and for spacing said annular attachment member from the outer cylinder in a position such that a bladed instrument may be used to simultaneously engage a tooth in said plurality of teeth on said annular attachment member and a tooth in the set of teeth on the outer cylinder to provide a torque for rotating both the inner cylinder and said annular attachment member relative to the outer cylinder when the bladed instrument is turned.
Apparatus for operating a chuck assembly having an outer cylinder with a set of teeth circumferentially arranged around one end thereof, an inner cylinder rotatably mounted within the outer cylinder, and a jaw mechanism mounted within the inner cylinder and movable between fully open and fully closed positions upon relative rotation of the inner and the outer cylinders, said apparatus comprising an annular member shaped to releasably fit over the inner cylinder of the chuck assembly, said annular member including a base portion around which a plurality of teeth are circumferentially arranged to form a toothed track, said toothed track having at least one helical section of teeth oriented at an incline relative to the set of teeth on the outer cylinder, said apparatus also comprising a securing means for releasably securing said annular member to the inner cylinder in a position relative to the outer cylinder such that any one of several bladed instruments of varying blade widths may be used to simultaneously engage at least one tooth in said toothed track formed around the base portion of said annular member and at least one tooth in the set of teeth on the outer cylinder to provide torque for rotating both the inner cylinder and said annular member relative to the outer cylinder when the bladed instrument is turned.
Apparatus for operating a chuck assembly having an outer cylinder with a set of teeth circumferentially arranged arouhd one end thereof, an inner cylinder rotatably mounted within the outer cylinder, the inner cylinder having at least one chuck key pivot hole formed therein adjacent the set of teeth on the outer cylinder, a chuck key having a pivot pin and a bevel gear for engagement with the set of teeth on the outer cylinder when the pivot pin is inserted in the chuck key pivot hole, and a jaw mechanism mounted within the inner cylinder and movable between fully open and fully closed positions upon relative rotation of the inner and the outer cylinders, said apparatus comprising an annular member shaped to releasably fit over the inner cylinder of the chuck assembly, said annular member including a plurality of teeth circumferentially arranged around one end thereof, said annular member also including a receiving means shaped to receive the bevel gear of the chuck key such that said receiving means may be brought into alignment with the chuck key pivot hole in the inner cylinder to receive the chuck key bevel gear which engages the set of teeth on the outer cylinder when the chuck key pivot pin formed on one end of the bevel gear is inserted into the chuck key pivot hole aligned with said receiving means.
A chuck assembly including:
Apparatus for operating a chuck assembly having an outer cylinder with a set of teeth circumferentially arranged around one end thereof, an inner cylinder rotatably mounted within the outer cylinder, the inner cylinder having at least one pivot hole formed therein adjacent the set of teeth of the outer cylinder, a jaw mechanism mounted within the inner cylinder and movable between fully open and fully closed positions upon relative rotation of the inner and the outer cylinders, and a torque applicator for providing relative rotational torque between the inner and the outer cylinders, the torque applicator having a pivot pin and a bevel gear which is brought into registry with the set of teeth on said outer cylinder when the pivot pin is inserted into the pivot hole, said apparatus comprising an annular member shaped to releasably fit over the inner cylinder of the chuck assembly, said annular member including a plurality of teeth circumferentially arranged around one end thereof, said annular member further including at least one threaded bore disposed therein, said apparatus also comprising a securing means for releasably securing said annular member to the inner cylinder in a position relative to the outer cylinder such that a bladed instrument may be used to simultaneously engage a tooth in said plurality of teeth on said annular member and a tooth in the set of teeth on the outer cylinder to provide a torque for rotating the inner cylinder relative to the outer cylinder when the bladed instrument is turned, said securing means including a set screw which is threaded into said threaded bore to releasably secure said annular member to the inner cylinder.
Apparatus for operating a chuck assembly having an outer cylinder with a set of teeth circumferentially arranged around one end thereof, an inner cylinder rotatably mounted within the outer cylinder, the inner cylinder having at least one pivot hole formed therein adjacent the set of teeth on the outer cylinder, a jaw mechanism mounted within the inner cylinder and movable between fully open and fully closed positions upon relative rotation of the inner and the outer cylinders, and a torque applicator for providing relative rotational torque between the inner and the outer cylinders, the torque applicator having a pivot pin and a bevel gear which is brought into registry with the set of teeth on said outer cylinder when the pivot pin is inserted into the pivot hole, said apparatus comprising an annular member shaped to releasably fit over the inner cylinder of the chuck assembly, said annular member including a plurality of teeth circumferentially arranged around one end thereof, said plurality of teeth forming a toothed track, said toothed track having at least one helical section of teeth oriented at an incline relative to the set of teeth on the outer cylinder, said apparatus also comprising a securing means for releasably securing said annular member to the inner cylinder in a position relative to the outer cylinder such that a bladed instrument may be used to simultaneously engage a tooth in said plurality of teeth on said annular member and a tooth in the set of teeth on the outer cylinder to provide a torque for rotating the inner cylinder relative to the outer cylinder when the bladed instrument is turned.
Apparatus for operating a chuck assembly having an outer cylinder with a set of teeth circumferentially arranged around one end thereof, an inner cylinder rotatably mounted within the outer cylinder, the inner cylinder having at least one pivot hole formed therein adjacent the set of teeth on the outer cylinder, a jaw mechanism mounted within the inner cylinder and movable between fully open and fully closed positions upon relative rotation of the inner and the outer cylinders, and a torque applicator for providing relative rotational torque between the inner and the outer cylinders, the torque applicator having a pivot pin and a bevel gear which is brought into registry with the set of teeth on said outer cylinder when the pivot pin is inserted into the pivot hole, said apparatus comprising an annular member shaped to releasably fit over the inner cylinder of the chuck assembly, said annular member including a plurality of teeth circumferentially arranged around one end thereof, said plurality of teeth forming a toothed track, said toothed track having three distinct helical sections of teeth, each said helical section being oriented at an incline relative to the set of teeth on the outer cylinder, said annular member further including a slot formed on one side thereof, said slot being positioned on said annular member in a manner such that said slot may be brought into alignment with a pivot hole contained in the inner cylinder, said slot operating to receive the bevel gear which engages the set of teeth on the outer cylinder when the pivot pin on the end of the torque applicator is inserted into the pivot hole aligned with said slot, said apparatus also comprising a securing means for releasably securing said annular member to the inner cylinder in a position relative to the outer cylinder such that a bladed instrument may be used to simultaneously engage a tooth in said plurality of teeth on said annular member and a tooth in the set of teeth on the outer cylinder to provide a torque for rotating the inner cylinder relative to the outer cylinder when the bladed instrument is turned.
A chuck assembly including:
A chuck assembly for use with a chuck key having a pivot pin, said chuck assembly including:
Dependencies are inferred from the claim text.
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No related US applications are recorded in the indexed filing history.
Moving obliquely to the axis of the chuck in a plane containing this axis: with locking arrangements
Chucks with simultaneously-acting jaws, whether or not also individually adjustable: moving obliquely to the axis of the chuck in a plane…
Socket type: obliquely guided reciprocating jaws
Threaded sleeve and jaw: conical sleeve
Term ended 5 Oct 1999 (estimated)
USPTO file history isn’t available for this patent, so only indexed dates are shown.
This invention relates to drill chucks capable of releasably holding interchangable drill bits and more particularly to an improved means for opening or closing the jaws of a drill chuck without the use of a conventional chuck operating key.
It has previously been recognized that conventional chuck keys are easy to lose, or frequently become separated from their associated chucks. When a chuck key is thus unavailable, it becomes difficult or impossible to operate the chuck and replace the drill bit or other cutting tool held therein.
Earlier attempts to address the problem of lost or misplaced chuck keys have resulted in the invention of various devices designed to allow a drill operator to open or close the jaws of a conventional chuck by means of a tool other than a chuck key. One such device is disclosed in U.S. Pat. No. 2,451,565, issued to Landow on Oct. 19, 1948. The Landow chuck adapter includes a tubular member which fits tightly over the lower portion of the chuck body and is secured thereto by means of a screw inserted radially through a threaded bore in the tubular member. The screw is designed to engage one of the radial bores which are disposed about the lower portion of the chuck body for the purpose of receiving the pin of a conventional chuck key. A bevel gear rotatably mounted within an interior recess on the tubular member engages the teeth cut in the outer cylinder of the chuck, and a shaft protrudes from one end of the bevel gear to form a hub on the outer surface of the tubular member. A suitable tool such as a hexagon key may be inserted into the hub and used to turn the bevel gear, thereby rotating the outer chuck cylinder relative to the inner portion of the chuck in the same manner as if the teeth on the outer chuck cylinder were engaged by a conventional chuck key.
The various features, objects and advantages of the present invention will become apparent from the following detailed description taken in conjunction with the accompanying drawings wherein:
FIG. 1 is a side elevational view of the chuck collar and that portion of a drill including the drill chuck assembly;
FIG. 2 is a perspective view of the chuck collar;
The conventional drill chuck indicated generally at 2 in FIG. 1 includes a set of jaws 4 mounted within an inner cylinder 6. An outer cylinder 8 with a plurality of teeth 10 circumferentially cut into one end thereof to form a toothed track 12 encircles the inner cylinder. Rotation of inner cylinder 6 relative to outer cylinder 8 operates a jaw mechanism (not shown) to open and close the chuck jaws 4. Three pivot holes 14 are arranged at 120.degree. intervals around the periphery of the inner cylinder.
Traditionally, a conventional chuck key 16 containing pivot pin 18, bevel gear 20 and handle 22 is used to operate the chuck. The pivot pin 18 is inserted in one of the pivot holes 14 on the periphery of the inner cylinder, whereupon the teeth of bevel gear 20 are brought into registry with the teeth of toothed track 12. The turning of handle 22 causes the inner cylinder to rotate relative to the outer cylinder, thereby activating the jaw mechanism to open or close jaws 4 as desired.
The present improvement comprises a tubular-shaped chuck collar 24 which is fitted over the chuck inner cylinder 6 in spaced relationship to the outer cylinder 8. The inner diameter of the collar is only slightly larger than the outer diameter of inner cylinder 6, thereby insuring a snug fit between the collar 24 and the inner cylinder 6. The collar 24 may be constructed of light-weight metal or other suitably durable material. Knurls 25 formed on the exterior of the collar furnish a gripping surface to assist in fitting the collar to the inner cylinder and manipulating the collar after it has been so fitted.