Drill chuck with plastic chuck body
AssigneeRohm Co., Ltd.
InventorHans-Dieter Mack
Life of this patent
Estimating the term…
Abstract
A drill chuck has a body element formed of fiber-reinforced plastic, centered on and rotatable about an axis, and formed centered on the axis with a rearwardly open spindle hole and a forwardly open tool hole. A ring element is axially fixed but rotatable about the axis on the body element and one of the elements is formed with a plurality of angled guide passages opening axially forward into the tool hole and the other of the elements is formed centered on the axis with a screwthread exposed in the passages. Respective jaws axially and radially displaceable in the passages are each formed with a row of teeth meshing with the screwthread so that rotation of the ring element in one direction displaces the jaws toward one another and opposite rotation displaces them away from one another.
Claims26
A drill chuck comprising:
- a body element formed of plastic reinforced with glass and carbon fibers and provided with an imbedded metallic reinforcement element, centered on and rotatable about an axis, and formed centered on the axis with a rearwardly open spindle hole and a forwardly open tool hole, the tool hole being formed in the metallic reinforcement element;
- a ring element axially fixed but rotatable about the axis on the body element, one of the elements being formed with a plurality of angled guide passages opening axially forward into the tool hole and the other of the elements being formed centered on the axis with a screwthread exposed in the passages;
- and
- respective jaws axially and radially displaceable in the passages and each formed with a row of teeth meshing with the screwthread, whereby rotation of the ring element in one direction displaces the jaws toward one another and opposite rotation displaces them away from one another.
A drill chuck comprising:
- a body element formed of fiber-reinforced plastic, centered on and rotatable about an axis, and formed centered on the axis with a rearwardly open spindle hole and a forwardly open tool hole;
- a ring element axially fixed but rotatable about the axis on the body element, one of the elements being formed with a plurality of angled guide passages opening axially forward into the tool hole and the other of the elements being formed centered on the axis with a screwthread exposed in the passages;
- and
- respective jaws axially and radially displaceable in the passages and each formed with a row of teeth meshing with the screwthread, whereby rotation of the ring element in one direction displaces the jaws toward one another and opposite rotation displaces them away from one another, the passages and jaws being of complementary polygonal cross section, the teeth being formed at a corner of the respective jaw and having a width smaller than a maximum width of the respective jaw.
A drill chuck comprising:
- a body element formed of fiber-reinforced plastic, centered on and rotatable about an axis, formed centered on the axis with a rearwardly open spindle hole and a forwardly open tool hole, provided with an imbedded metallic reinforcement sleeve lining the spindle hole, and formed with a radially outwardly open groove receiving the ring, the element having a flange forming a back flank of the groove;
- a ring element axially fixed but rotatable about the axis on the body element, one of the elements being formed with a plurality of angled guide passages opening axially forward into the tool hole and the other of the elements being formed centered on the axis with a screwthread exposed in the passages;
- and
- respective jaws axially and radially displaceable in the passages and each formed with a row of teeth meshing with the screwthread, whereby rotation of the ring element in one direction displaces the jaws toward one another and opposite rotation displaces them away from one another.
Dependencies are inferred from the claim text.