Portable drill with built-in chuck key
First Claim
Patent Images
1. In a power drill including a chuck for holding a working tool the combination comprising:
- a housing;
a motor-driven main shaft mounted in said housing for rotation by a driving motor;
a main shaft locking mechanism disposed within said housing for engaging said main shaft to selectively lock the main shaft;
a chuck key permanently slidably mounted in said housing and engageable with the chuck, said chuck key being moveable in said housing between an operating and a nonoperating position;
spring biasing means for normally retaining said main shaft locking mechanism and said chuck in a nonoperating position;
said main shaft locking mechanism includingan inverted substantially U-shaped bracket member slidably supported within said housing and straddling said main shaft;
a pair of bearing support rods disposed within the housing on each side of said main shaft for slidably supporting said U-shaped bracket member, andmeans formed on said U-shaped bracket member for lockingly engaging said main shaft.
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Abstract
A power tool such as a drill, for example, including a modified Jacobs chuck and incorporating a chuck key permanently mounted in the power tool housing and a main shaft locking device for locking the main shaft when the chuck key is used to manipulate, i.e., open or close, the chuck and spring biasing means for normally retaining the main shaft locking device and the chuck key out of the operating position so that the tool can operate freely.
42 Citations
13 Claims
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1. In a power drill including a chuck for holding a working tool the combination comprising:
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a housing; a motor-driven main shaft mounted in said housing for rotation by a driving motor; a main shaft locking mechanism disposed within said housing for engaging said main shaft to selectively lock the main shaft; a chuck key permanently slidably mounted in said housing and engageable with the chuck, said chuck key being moveable in said housing between an operating and a nonoperating position; spring biasing means for normally retaining said main shaft locking mechanism and said chuck in a nonoperating position;
said main shaft locking mechanism includingan inverted substantially U-shaped bracket member slidably supported within said housing and straddling said main shaft; a pair of bearing support rods disposed within the housing on each side of said main shaft for slidably supporting said U-shaped bracket member, and means formed on said U-shaped bracket member for lockingly engaging said main shaft. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. In a power drill including a chuck for holding a working tool the combination comprising:
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a housing; a motor-driven main shaft mounted in said housing for rotation by a driving motor; a main shaft locking mechanism disposed within said housing for engaging said main shaft to selectively lock said main shaft; a chuck key permanently slidably mounted in said housing and engageable with the chuck, said chuck key being movable in said housing between an operating and a nonoperating position; spring biasing means for normally retaining said main shaft locking mechanism and said chuck key in a nonoperating position; said chuck key being formed with a tubular portion and a handle portion said tubular portion depending from said handle portion and extending through a wall portion in said housing; said biasing means including a compression spring member extending between a portion of said housing and said handle portion for urging said chuck key out of engagement with said chuck, said locking mechanism including a locking pin slidably disposed within said chuck key, and a spring disposed within said tubular portion for urging said locking pin into locking engagement with said main shaft. - View Dependent Claims (10)
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11. In a power tool including a chuck for holding a working tool the combination comprising:
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a housing; a motor-driven main shaft mounted in said housing for rotation by a driving motor; a main shaft locking mechanism disposed within said housing for engaging said main shaft to selectively lock said main shaft; a chuck key permanently slidably mounted in said housing and engageable with the chuck, said chuck key being movable in said housing between an operating and a nonoperating position; means mounted within said housing for securing said main shaft against rotation when said chuck key is being operated; means associated with said chuck key and said securing means for retaining them in a nonoperable position during normal operation of the tool; said main shaft locking mechanism including an inverted substantially U-shaped bracket member slidably supported within said housing and straddling said main shaft, a pair of bearing support rods disposed within the housing on each side of said main shaft for slidably supporting said U-shaped bracket member, and means formed on said U-shaped bracket member for lockingly engaging said main shaft.
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12. In a power tool including a chuck for holding a working tool the combination comprising:
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a housing; a motor-driven main shaft mounted in said housing for rotation by a driving motor; a main shaft locking mechanism disposed within said housing for engaging said main shaft to selectively lock the main shaft; a chuck key permanently slidably mounted in said housing and engageable with the chuck, said chuck key being movable in said housing between an operating and a nonoperating position; spring biasing means for normally retaining said main shaft locking mechanism and said chuck key in a nonoperating position; said chuck key being formed with a tubular portion and a handle portion said tubular portion depending from said handle portion and extending through a wall portion in said housing; said biasing means including a compression spring member extending between a portion of said housing and said handle portion for urging said chuck key out of engagement with said chuck, said locking mechanism including a locking pin slidably disposed within said chuck key, and a spring disposed within said tubular portion for urging said locking pin into locking engagement with said main shaft. - View Dependent Claims (13)
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Specification