Associating drill chuck keys with drill
OwnerJ. Farny Brockinventor
Life of this patent
Estimating the term…
Abstract
A means for holding a drill chuck key in operative position on a drill chuck is provided by a pair of arms that straddle the chuck and include a shape and resilience to ensure that the chuck will be brought into operative position by cam action, and thereafter, held in proper position. That is augmented by a means for detachably securing the chuck key to another part of the drill when it is not in use to adjust the chuck. That function is accomplished with a retaining element associated with the key or with the drill, and which, when associated with the drill, has a shape so that the arms by which the key is fastened to the chuck co-act in the same way with the retaining element as with the chuck.
Claims10
For an electric drill of the kind having a chuck whose relatively moving parts are rotatable by a key, the key including a pin insertable into a first part of the chuck and a gear whose teeth mesh with teeth on a second part of said chuck when the pin is inserted to the first part of said chuck;
- an improved key and key attachment assembly comprising a key having a shank ending at one end in a pin and a gear;
- fastening means for clamping the key to said first part of a drill chuck with its pin in the first part of the chuck and with its teeth in mesh with the teeth of the chuck while permitting simultaneously rotation of the key and said second part of the chuck;
- said clamping means comprising a pair of spaced resilient arms extending in like direction on opposite sides of said pin and gear;
- said arms being biased toward one another to a position in which their spacing is less than the dimension across said first part of the chuck;
- and
- securing means for securing said arms to the key while permitting rotation of the gear relative to said arms.
For an electric drill of the kind having a chuck whose relatively moving parts are rotatable by a key, the key including a pin insertable into a first part of the chuck and a gear whose teeth mesh with teeth on a second part of said chuck when the pin is inserted to the first part of said chuck;
- an improved key and key attachment assembly comprising a key having a shank ending at one end in a pin and a gear;
- fastening means for clamping the key to said first part of a drill chuck with its pin in the first part of the chuck and with its teeth in mesh with the teeth of the chuck while permitting simultaneously rotation of the key and said second part of the chuck;
- said clamping means comprising a pair of spaced resilient arms extending in like direction on opposite sides of said pin and gear;
- said arms being biased toward one another to a position in which their spacing is less than the dimension across said first part of the chuck;
- securing means for securing said arms to the key while permitting rotation of the gear relative to said arms;
- and
- end portion of said arms being formed with surfaces extending away from one another and away from said key and such that portions of the arms adjacent to said end portions are formed with the surfaces extending toward one another and away from said key whereby the arms are first cammed apart as the arms are forced against said first part of a chuck and thereafter cammed toward the pin and into said first part of the chuck.
Dependencies are inferred from the claim text.