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US3815397A Expired / Lapsed US ⏱️ 0.0 years remaining

Swaging and finishing tool

Assignee: Elliott Turbomachinery Co Inc
•
Filing: 1973-04-02
•
Granted: 1974-06-11
•
Expires: 1993-04-02
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Abstract

Abstract The tool of this invention functions to effect a substantial reduction in the end portion of the workpiece. A circular series of rollers, mounted in a roller cage, are contained within a mandrel sleeve fixedly secured to a driver. The forward end portions of the rollers are formed with conical surfaces converging toward the outer ends of the rollers. A roller supporting plug is rotatably attached to the driver and is positioned within the inner portions of the rollers for engagement thereby to maintain the rollers against the inner surface of the mandrel. The rollers and the inner surface of the mandrel are dimensioned so that the portions of the rollers intermediate the forward and inner ends thereof inscribe a diameter inside the intermediate portions of the rollers of proper size to form the diameter of the reduced end portion of the workpiece and finish the same.

Inventors

  • 👤 E Hollencamp

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-26 07:53
CPC Classifications
B; B21; B21D; B21D41/00; B21D41/04

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 116 words
A swaging and finishing tool for swaging and finishing the inner end portion of a cylindrical workpiece to a smaller diameter comprising a rotatable and axially movable driver, a mandrel sleeve fixed to said driver, a tubular roller cage mounted within said mandrel, a circular series of rollers rotatably mounted in said cage and restrained against axial movement relative thereto, the outer portions of said rollers being formed with conical surfaces converging toward the outer ends of the rollers, a cylindrical roller supporting plug rotatably attached to the driver and positioned within the inner portions of the rollers in said series, said plug serving to prevent inward radial movement of said rollers from said mandrel sleeve.
Claim 2
Dependent Claim 116 words
A swaging and finishing tool for swaging and finishing the inner end portion of a cylindrical workpiece to a smaller diameter comprising a rotatable and axially movable driver, a mandrel sleeve fixed to said driver, a tubular roller cage mounted within said mandrel, a circular series of rollers rotatably mounted in said cage and restrained against axial movement relative thereto, the outer portions of said rollers being formed with conical surfaces converging toward the outer ends of the rollers, a cylindrical roller supporting plug rotatably attached to the driver and positioned within the inner portions of the rollers in said series, said plug serving to prevent inward radial movement of said rollers from said mandrel sleeve.
Claim 3
Dependent Claim 34 words
A swaging and finishing tool as set forth in claim 1 wherein said roller cage is mounted for limited axial movement relative to said mandrel and means yieldingly opposing such movement of said cage.
Claim 4
Dependent Claim 25 words
A swaging and finishing tool as set forth in claim 1 wherein said roller supporting plug is fixed against axial movement relative to said driver.
Claim 5
Dependent Claim 31 words
A swaging and finishing tool as set forth in claim 1 wherein said mandrel is adjustable axially on said driver and means fixing said mandrel to said driver in adjusted position.
Claim 6
Dependent Claim 67 words
A swaging and finishing tool as set forth in claim 1 wherein the inner end of said tubular roller cage is formed with an inner end wall, said roller supporting plug being positioned forwardly of said end wall and fixed against axial movement relative to said driver, and a helical compression spring interposed between the inner end of said plug and said end wall of said cage.

References Cited (Backward Citations)

US1665915A Cited
US1798074A Cited
US2522257A Cited
US3350762A Cited
US3452567A Cited
US3504514A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-06-10 1977-12-10 1978-06-11 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-06-10 1981-12-10 1982-06-11 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-06-10 1985-12-10 1986-06-11 $7700.00 Window Closed / Lapsed

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