Device for drilling pocket holes

1. A device for drilling pocket holes in a workpiece comprising:

a guide carrier having a slant bore for receiving a drill bit which defines a drilling direction;

a front surface disposed at the guide carrier and urging a workpiece;

a step collar mounted on a shank of the drill bit, which is slidable from a pre-drilling position to a post-drilled position toward and away from the guide carrier;

a retaining structure disposed at the guide carrier to keep the step collar at the pre-drilling position;

a drill bit carrier slidably connected to the retaining structure;

wherein the step collar mounted to the shank of the drill bit is held within the drill bit carrier;

wherein the step collar is held within the drill bit carrier by a step of the step collar and a stop collar mounted on the drill bit.

2. A device of claim 1 , wherein the retaining structure comprises at least one of a rigid bar, a L-shaped flat spring, an arched flat spring, a snap spring or a compression spring.

3. A device of claim 2 , further comprising a drill bit carrier in which the step collar is rotatably coupled and axially retained.

4. A device of claim 1 , further comprising a base on which a guide structure is mounted so that the guide carrier can slide on the guide structure in a longitudinal direction and can select its position with respect to an end stop which engages an end face in the workpiece.

5. A device of claim 1 , further comprising at least one rigid guide bar which has a first end on where the guide carrier is slidably mounted in a longitudinal direction and a second end on where an end stop is mounted so that the guide carrier can select its position with respect to the end stop which has a relationship with an end face off the workpiece.

6. A device of claim 1 , further comprising indicia disposed on the retaining structure, which indicate workpiece thickness.

7. A device of claim 1 , wherein the drill bit comprises a step drill, a shank and a pocket drill formed in-between, wherein the step drill and a portion of the pocket drill are made of more wear-resistant material than that of the shank material.

8. A device of claim 1 , wherein the diameter of the bore is at least 7/16 inch (11.1 mm).

9. A device of claim 1 , wherein the drill bit comprises a step drill, a shank and a pocket drill formed in-between, wherein the step drill and a portion of the pocket drill are made of more wear-resistant material than that of the shank material.

10. A device for drilling pocket holes in a workpiece comprising:

a base having an end stop engaging an end face of the workpiece;

a guide carrier disposed at the base having a front surface urging a front face of the workpiece, wherein the front face is perpendicular to the end stop;

at least one slant bore disposed at the guide carrier for receiving a drill bit;

a clamp disposed on the base to move in a transverse direction;

a step collar mounted on a shank of the drill bit, which is slidable from a pre-drilling position to a post-drilled position toward and away from the guide carrier;

a retaining structure mounted on the guide carrier to keep the step collar at the pre-drilling position;

a drill bit carrier slidably mounted to the retaining structure;

wherein the drill bit carrier is kept at a pre-drilling position by a leaf or flat spring which is connected to the retaining structure and engages and holds the drill bit carrier by a rest bend.

11. A device of claim 10 , further comprising a drill bit carrier in which the step collar is rotatably coupled and axially retained, wherein the drill bit carrier is guided by the retaining structure.

12. A device of claim 10 , further comprising a braking lever for quick positioning of the clamp which is slidable on the base.

13. A device of claim 10 , further comprising at least one lateral stop structure disposed at least one of the clamp, guide carrier or base so as to set a lateral position of the pocket hole from a side face of workpiece.

14. A device of claim 10 , further comprising a lateral opening and a hose adapter secured therein, wherein the lateral opening communicates with the slant bore to remove waste material generated from workpiece drilling.

15. A device of claim 14 , further comprising a waste material remover having a blower, a motor to turn the blower and a sensor, wherein the sensor activates the blower when the sensor senses drill motor driving the drill bit is turned on.

16. A device of claim 10 , further comprising a guide structure disposed on the base, wherein the guide carrier slidably mounted on the guide structure in a longitudinal direction.

17. A device of claim 16 , further comprising indicia indicating workpiece thickness, which are disposed on at least one of the guide carrier, the guide structure or gauging structure.

18. A device for drilling pocket holes in a workpiece comprising:

a base having an end stop engaging an end face of the workpiece;

a guide carrier disposed at the base having a front surface urging the workpiece;

at least one slant bore disposed at the guide carrier for receiving a drill bit;

a clamp to urge the workpiece;

an amplifier operated by a user's power to generate a higher output force for the clamp to clamp or to unclamp the workpiece;

a cable connected on a first end to the amplifier and connected on a second end to a yoke;

wherein the yoke is operatively connected to the clamp;

wherein the amplifier is disposed away from the base by the cable;

wherein the amplifier has a lever connected to the cable such that when the lever is pressed the clamp is actuated;

wherein the amplifier is operatively connected to the yoke by the cable;

wherein when the amplifier is actuated the yoke adjusts the clamp for workpiece thickness;

wherein the yoke has a second lever that adjusts the position of the clamp.

19. A device of claim 18 wherein the amplifier comprises two dissimilar bore sized cylinders and a tube which holds fluid.

20. A device for drilling pocket holes in a workpiece comprising:

a guide carrier having a slant bore for receiving a drill bit;

a front surface disposed at the guide carrier and urging a workpiece; and

at least one anti-skid structure disposed at the front surface to secure the guide carrier with respect to the workpiece during drilling;

wherein the at least one anti-skid structure is adjustable;

wherein the at least one anti-skid structure is threadably engaged in the guide carrier.

21. A device of claim 20 , wherein the anti-skid structure has a front surface that includes at least one of a pin, a cone point screw, a knurled metal surface, a sandpaper surface or an elastomeric material surface.

22. The device of claim 1 wherein the step collar and the stop collar are mounted to the shank of the drill bit by a set screw.

23. The device of claim 1 wherein the step collar and the stop collar are positioned on opposite sides of the drill bit carrier, thereby lockingly engaging the drill bit to the drill bit carrier.