Back to results
US 11,931,816 B2Granted
Thread-cutting die head for powered pipe threader
AssigneeMilwaukee Electric Tool Corporation
InventorMatthew R. Wolf
Life of this patent
Estimating the term…
Abstract
A thread-cutting die head includes a die carrier, defining a central axis, for supporting a plurality of thread-cutting dies, a cam plate coaxial with the die carrier including a plurality of cam members for engaging with the plurality of thread-cutting dies, and a locking system including a positioning screw extending through an arcuate slot in the cam plate, a bushing surrounding the positioning screw, and a handle threadably coupled to the positioning screw configured to impart a force against the bushing to press the flange portion of the bushing against the first surface of the cam plate, thereby developing a frictional force between the bushing and the cam plate to lock the rotational position of the cam plate relative to the die carrier.
Claims11
A thread-cutting die head for a powered pipe threading machine, the thread-cutting die head comprising:
- a die carrier, defining a central axis, for supporting a plurality of thread-cutting dies for displacement relative to the central axis in a radially inward direction and radially outward direction;
- a cam plate coaxial with the die carrier including a plurality of cam members for engaging with the plurality of thread-cutting dies and displacing the cutting dies in the radially inward direction and radially outward direction in response to relative rotation between the cam plate and the die carrier;
- and
- a locking system including
- a positioning screw extending through an arcuate slot in the cam plate, the arcuate slot extending between a first face and a second face of the cam plate, the first face of the cam plate having a first surface roughness,
- a bushing surrounding the positioning screw having a flange portion with a second surface roughness less than the first surface roughness engaged with the first face of the cam plate, and
- a handle threadably coupled to the positioning screw configured to impart a force against the bushing to press the flange portion of the bushing against the first face of the cam plate, thereby developing a frictional force between the bushing and the cam plate to lock the rotational position of the cam plate relative to the die carrier.
4 more elements
A thread-cutting die head for a powered pipe threading machine, the thread-cutting die head comprising:
- a die carrier, defining a central axis, for supporting a plurality of thread-cutting dies for displacement relative to the central axis in a radially inward direction and radially outward direction;
- a cam plate coaxial with the die carrier including a plurality of cam members for engaging with the plurality of thread-cutting dies and displacing the cutting dies in the radially inward direction and radially outward direction in response to relative rotation between the cam plate and the die carrier;
- and
- a locking system including
- a positioning screw extending through an arcuate slot in the cam plate,
- a guide pin parallel to the positioning screw and positioned within the arcuate slot,
- a bushing surrounding the positioning screw having a flange portion engaged with a first face of the cam plate,
- a handle threadably coupled to the positioning screw configured to impart a force against the bushing to press the flange portion of the bushing against the first face of the cam plate, thereby developing a frictional force between the bushing and the cam plate to lock the rotational position of the cam plate relative to the die carrier,
- a rack coupled to the cam plate,
- a pinion rotatably supported by a head of the positioning screw and meshed with the rack, and
- an actuator coupled for co-rotation with the pinion,
- wherein, in response to rotation of the actuator and the pinion, the die carrier is rotated relative to the cam plate to adjust a radial position of the thread-cutting dies.
9 more elements
A thread-cutting die head for a powered pipe threading machine, the thread-cutting die head comprising:
- a die carrier, defining a central axis, for supporting a plurality of thread-cutting dies for displacement relative to the central axis in a radially inward direction and radially outward direction;
- a cam plate coaxial with the die carrier including a plurality of cam members for engaging with the plurality of thread-cutting dies and displacing the cutting dies in the radially inward direction and radially outward direction in response to relative rotation between the cam plate and the die carrier;
- and
- a locking system including
- a positioning screw extending through an arcuate slot in the cam plate,
- a bushing surrounding the positioning screw having a flange portion engaged with a first face of the cam plate,
- a handle threadably coupled to the positioning screw configured to impart a force against the bushing to press the flange portion of the bushing against the first face of the cam plate, thereby developing a frictional force between the bushing and the cam plate to lock the rotational position of the cam plate relative to the die carrier,
- a rack coupled to the cam plate,
- a pinion rotatably supported by a head of the positioning screw and meshed with the rack, and
- an actuator coupled for co-rotation with the pinion,
- wherein, in response to rotation of the actuator and the pinion, the die carrier is rotated relative to the cam plate to adjust a radial position of the thread-cutting dies, and
- wherein a shaft on which the pinion is formed is cantilevered from the head of the positioning screw.
9 more elements
A thread-cutting die head for a powered pipe threading machine, the thread-cutting die head comprising:
- a die carrier, defining a central axis, for supporting a plurality of thread-cutting dies for displacement relative to the central axis in a radially inward direction and radially outward direction;
- a cam plate coaxial with the die carrier including a plurality of cam members for engaging with the plurality of thread-cutting dies and displacing the cutting dies in the radially inward direction and radially outward direction in response to relative rotation between the cam plate and the die carrier;
- and
- a locking system including
- a positioning screw extending through an arcuate slot in the cam plate,
- a bushing surrounding the positioning screw having a flange portion engaged with a first face of the cam plate,
- a handle threadably coupled to the positioning screw configured to impart a force against the bushing to press the flange portion of the bushing against the first face of the cam plate, thereby developing a frictional force between the bushing and the cam plate to lock the rotational position of the cam plate relative to the die carrier,
- a rack coupled to the cam plate,
- a pinion rotatably supported by a head of the positioning screw and meshed with the rack, and
- an actuator coupled for co-rotation with the pinion,
- wherein, in response to rotation of the actuator and the pinion, the die carrier is rotated relative to the cam plate to adjust a radial position of the thread-cutting dies,
- wherein a shaft on which the pinion is formed is rotatably supported at one end by a pinion bushing and at an opposite end by the head of the positioning screw, and
- wherein the pinion bushing is slidable within a second arcuate slot in the cam plate.
10 more elements
A thread-cutting die head for a powered pipe threading machine, the thread-cutting die head comprising:
- a die carrier, defining a central axis, for supporting a plurality of thread-cutting dies for displacement relative to the central axis in a radially inward direction and radially outward direction;
- a cam plate coaxial with the die carrier including a plurality of cam members for engaging with the plurality of thread-cutting dies and displacing the cutting dies in the radially inward direction and radially outward direction in response to relative rotation between the cam plate and the die carrier;
- and
- a locking system including
- a positioning screw extending through an arcuate slot in the cam plate,
- a bushing surrounding the positioning screw having a flange portion engaged with a first face of the cam plate,
- a handle threadably coupled to the positioning screw configured to impart a force against the bushing to press the flange portion of the bushing against the first face of the cam plate, thereby developing a frictional force between the bushing and the cam plate to lock the rotational position of the cam plate relative to the die carrier,
- a rack coupled to the cam plate,
- a pinion rotatably supported by a head of the positioning screw and meshed with the rack, and
- an actuator coupled for co-rotation with the pinion,
- wherein, in response to rotation of the actuator and the pinion, the die carrier is rotated relative to the cam plate to adjust a radial position of the thread-cutting dies, and
- wherein the first face or a second face of the cam plate is a knurled surface.
9 more elements
Dependencies are inferred from the claim text.