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US 5,480,271 AGranted
Adjustable die head
AssigneesPower House Tool, Inc., JNT Technical Services, Inc.
InventorsGlenn F. Jorgensen, Michael W. Kelly
Life of this patent
Estimating the term…
Abstract
An adjustable die assembly having a ring structure with a clear central aperture for locating the ring structure along an axial length of a rod to have threads repaired or cut, and having a plurality of thread cutting chaser inserts connected to tool blocks which are slidable radially on said ring, each tool block connected to a threaded adjustment shaft, threaded into said ring for adjusting the radial position of each chaser insert. Alternatively, each threaded adjustment rod can be provided with a pinion gear, and a rim gear can be in mesh with each pinion gear, and a gear device can be provided for turning the rim gear to simultaneously adjust all chasers radially.
Claims17
A die assembly for cutting threads around a rod, comprising:
- a frame means for encircling the rod and for being rotated by an operator;
- a plurality of thread cutting chasers mounted to said frame means having a freedom of movement in a radial direction toward and away from said rod;
- means allocated at each of said chasers for selectively radially positioning said chasers;
- and
- pin means for locking said chasers at predetermined radial positions corresponding to thread diameters to be cut.
2 more elements
A die assembly for cutting threads around a rod, comprising:
- a frame means for encircling the rod and for being rotated by an operator;
- a plurality of thread cutting chasers mounted to said frame means having a freedom of movement in a radial direction toward and away from said rod;
- and
- means allocated at each of said chasers for selectively radially positioning said chasers;
- wherein each of said chasers comprises a thread cutting chaser insert, and a tool block, said thread cutting chaser insert being fastened to said tool block;
- and
- said frame comprises a radially orientated tool block slot and said tool block partially resides within said tool block slot to slide with respect thereto, said means for positioning being connected to each said tool block.
4 more elements
A die assembly for cutting threads around a rod, comprising:
- a frame means for encircling the rod and for being rotated by an operator;
- a plurality of thread cutting chasers mounted to said frame means having a freedom of movement in a radial direction toward and away from said rod;
- and
- means allocated at each of .said chasers for selectively radially positioning said chasers;
- and
- wherein said means for radially positioning comprises a rim gear, and each chaser has associated therewith a threaded rod, threaded through a bore in said frame means and connected at one end to said chaser with an opposite end having a pinion gear allocated thereon, said pinion gears being in mesh with said rim gear such that turning of said rim gear turns all said pinion gears an equal amount.
3 more elements
A die assembly for cutting threads around a rod, comprising:
- a frame means for encircling the rod and for being rotated by an operator;
- a plurality of thread cutting chasers mounted .to said frame means having a freedom of movement in a radial direction toward and away from said rod;
- and
- means allocated at each of said chasers for selectively radially positioning said chasers;
- and
- further comprising a locator mark applied to each said chaser and a graduated scale applied to said frame means adjacent said locator mark.
3 more elements
A die assembly for cutting threads around a rod, comprising:
- a frame means for encircling the rod and for being rotated by an operator;
- a plurality of thread cutting chasers mounted to said frame means having a freedom of movement in a radial direction toward and away from said rod;
- and
- means allocated at each of said chasers for selectively radially positioning said chasers;
- and
- wherein each said chaser comprises a thread cutting chaser insert and a tool block connected thereto, said tool bock radially slidable with respect to said frame means to position said chaser insert, said tool block comprises a plurality of holes aligned in a radial direction and said frame means comprises a stop pin insertable into a selected one of said holes to fix a radial position of said tool block.
3 more elements
A die assembly for cutting threads around a rod, comprising:
- a ring for surrounding the rod, said ring having a plurality of guide means arranged radially thereon;
- a plurality of tool blocks mounted slideably on said ring and guided for radial movement by said guide means, said tool blocks spaced angularly apart on said ring;
- a plurality of thread cutting chaser inserts having thread cutting teeth arranged thereon for contact with said rod, one insert mounted on each tool block;
- and
- means for adjusting the radial position of each said tool block to correspond to the diameter of the rod.
2 more elements
A method of cutting thread in a rod comprising the steps of:
- providing a frame having a central open region allowing the rod to be placed therethrough to position the frame axially on said rod;
- providing on said frame radially inwardly directed thread cutting chasers;
- providing a means for radially adjusting the position of said thread cutting chasers with respect to said frame;
- axially locating said frame to a position of said rod where threads are to be cut;
- adjusting the radial position of said thread cutting chasers to preselected radial positions and inserting pins to lock said chasers at said radial positions to engage the area of said rod where threads are to be cut;
- and
- using force turning said frame about the axis of said rod to cut threads.
4 more elements
The method of cutting thread in a rod comprising the steps of:
- providing a frame having a central open region allowing the rod to be placed therethrough to position the frame axially on said rod;
- providing on said frame radially inwardly directed thread cutting chasers;
- providing a means for radially adjusting the position of said thread cutting chasers with respect to said frame;
- axially locating said frame to a position of said rod where threads are to be cut;
- adjusting the radial position of said thread cutting chasers to engage the area of said rod where threads are to be cut;
- using force turning said frame about the axis of said rod to cut threads;
- providing a means of adjusting all of said chasers simultaneously by turning one actuator;
- and
- turning said actuator to radially project inwardly said thread cutting chasers to engage said rod, wherein said means of radially adjusting comprises screw adjusters for radially positioning..said chasers;
- and said means of adjusting all of said chasers comprises a gear means for mechanically connecting said actuator with said screw adjusters to axially turn each of said screw adjusters.
7 more elements
Dependencies are inferred from the claim text.