US 10,421,132 B1Granted

Drill extension

OwnerHarold E Riffellinventor

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Abstract

A drill extension for extending the working reach of a drill uses a hollow tubular body that has a shaft rotatably disposed therein and held therein by a pair of spaced apart bearings, each bearing attached to an inner surface of the body. The shaft has a male end that is received within a chuck of the drill and an opposing female receiver for receiving a shaft of a drill or the male end of another drill extension. A handle is attached the outer surface of the body member such that the handle has a ring member that is received within an encircling groove on the outer surface of the body member, the handle also has a grasp arm. At least one level is attached to the outer surface and is oriented either radially with respect to a longitudinal axis of the body member or in parallel with the axis or both.

Claims9

Dependent claims

A drill extension comprising:

a first hollow tubular body member having a first end and a second end and having a first inner surface and a first outer surface and a first interior;
a first bearing attached to the first inner surface of the first body member proximate the first end;
a second bearing attached to the first inner surface of the first body member proximate the second end;
a first shaft having a first male end and an opposing first female receiver joined by a first shank, the first shaft rotatably disposed within the first body member such that the first shank is received within the first bearing and within the second bearing such that the first female receiver is fully disposed within the first interior;
a second hollow tubular body member having a third end and a fourth end and having a second inner surface and a second outer surface and a second interior;
a third bearing attached to the second inner surface of the second body member proximate the third end;
a fourth bearing attached to the second inner surface of the second body member proximate the fourth end;
a second shaft having a second male end and an opposing second female receiver joined by a second shank, the second shaft rotatably disposed within the second body member such that the second shank is received within the third bearing and within the fourth bearing such that the second female receiver is fully disposed within the second interior and such that the first body member is connected to the second body member so that the second end of the first body member abuts the third end of the second body member and such that the second male end of the second shaft is received within the first female received of the first shaft so that rotation of the first shaft rotates the second shaft in lockstep;
and
a handle attached to the first outer surface of the first body member wherein the handle has a grasp arm attached to a ring member such that the ring member is received within a first groove that encircles the first outer surface of the first body member.

7 more elements

Dependencies are inferred from the claim text.

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Abstract

A drill extension comprising:

a first hollow tubular body member having a first end and a second end and having a first inner surface and a first outer surface and a first interior;
a first bearing attached to the first inner surface of the first body member proximate the first end;
a second bearing attached to the first inner surface of the first body member proximate the second end;
a first shaft having a first male end and an opposing first female receiver joined by a first shank, the first shaft rotatably disposed within the first body member such that the first shank is received within the first bearing and within the second bearing such that the first female receiver is fully disposed within the first interior;
a second hollow tubular body member having a third end and a fourth end and having a second inner surface and a second outer surface and a second interior;
a third bearing attached to the second inner surface of the second body member proximate the third end;
a fourth bearing attached to the second inner surface of the second body member proximate the fourth end;
a second shaft having a second male end and an opposing second female receiver joined by a second shank, the second shaft rotatably disposed within the second body member such that the second shank is received within the third bearing and within the fourth bearing such that the second female receiver is fully disposed within the second interior and such that the first body member is connected to the second body member so that the second end of the first body member abuts the third end of the second body member and such that the second male end of the second shaft is received within the first female received of the first shaft so that rotation of the first shaft rotates the second shaft in lockstep;
and
a handle attached to the first outer surface of the first body member wherein the handle has a grasp arm attached to a ring member such that the ring member is received within a first groove that encircles the first outer surface of the first body member.

7 more elements