US3906776A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-drilling blind riveting tool
Assignee: USM Corp
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Filing: 1974-11-11
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Granted: 1975-09-23
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Expires: 1994-11-11
Abstract
Abstract A power tool for installing self-drilling mandrel-rivet assemblies comprises a rotary rivet-abutting nosepiece, a relatively retractable mandrel-pulling means rotatable with the nosepiece, and mechanism whereby the nosepiece and mandrelpulling means are rotated to enable a rivet assembly to drill a hole in a workpiece for receiving the rivet and thereafter relatively retract the mandrel-pulling means to set the rivet in the hole.
Inventors
- 👤 Alan K Humphreys
- 👤 Daniel R Smith
- 👤 Edward H Webb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:24
CPC Classifications
B; B21; B21J; B21J15/00; B21J15/02; B21J15/04; B21J15/048; B25; B25B; B25B27/00; B25B27/0007; B25B27/0014; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49908; Y10T29/49915; Y10T29/4992; Y10T29/49938; Y10T29/4994; Y10T29/53; Y10T29/5343; Y10T29/53709; Y10T29/53717; Y10T29/53726; Y10T29/5373
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
154 words
A blind-riveting tool for setting the rivets of self-drilling pull-type blind-riveting assemblies having a mandrel stem in a workpiece, comprising a housing portion, a sleeve rotatably mounted in the housing portion and projecting forwardly therefrom to provide abutment means to engage the head of the rivet and restrain bodily movement thereof relative to the workpiece during rivet setting, and mandrel-pulling means mounted in said sleeve for rotation therewith and for axial reciprocation relative thereto, the mandrel-pulling means being engageable with the mandrel stem to cause rotation of the assembly for the drilling operation and thereafter operable to grip and pull the mandrel to set the rivet, and the tool comprising power means whereby, in the operation of the tool, said sleeve and mandrel-pulling means are rotated to enable the assembly to drill a hole in the workpiece and means whereby the mandrel-pulling means is thereupon retractable relative to said sleeve to set the rivet.
Claim 2
Dependent Claim
154 words
A blind-riveting tool for setting the rivets of self-drilling pull-type blind-riveting assemblies having a mandrel stem in a workpiece, comprising a housing portion, a sleeve rotatably mounted in the housing portion and projecting forwardly therefrom to provide abutment means to engage the head of the rivet and restrain bodily movement thereof relative to the workpiece during rivet setting, and mandrel-pulling means mounted in said sleeve for rotation therewith and for axial reciprocation relative thereto, the mandrel-pulling means being engageable with the mandrel stem to cause rotation of the assembly for the drilling operation and thereafter operable to grip and pull the mandrel to set the rivet, and the tool comprising power means whereby, in the operation of the tool, said sleeve and mandrel-pulling means are rotated to enable the assembly to drill a hole in the workpiece and means whereby the mandrel-pulling means is thereupon retractable relative to said sleeve to set the rivet.
Claim 3
Dependent Claim
55 words
A tool according to claim 1 in which said sleeve is coupled to a hollow spindle of a rotary motor accommodated in the housing portion of the tool and the mandrel-pulling means is operatively associated with a drawbar which passes rearwardly through said spindle and constitutes part of the means for retracting the mandrel-pulling means.
Claim 4
Dependent Claim
29 words
A tool according to claim 2 in which the operative association of the mandrel-pulling means with said drawbar permits rotation of the mandrel-pulling means without rotation of the drawbar.
Claim 5
Dependent Claim
55 words
A tool according to claim 3 in which the drawbar passes through an inner ring of a ball race, the outer ring of which is slidably accommodated in said sleeve, and the mandrel-pulling means comprises a sleeve portion which has an internal shoulder accommodated between the ball race and an external lip of the drawbar.
Claim 6
Dependent Claim
45 words
A tool according to claim 4 in which said sleeve portion of the mandrel-pulling means forms part of a jaw case with, at its forward end, an internal tapering surface against which mandrel-gripping jaws of the tool, urged forward by spring means, are slidably accommodated.
Claim 7
Dependent Claim
68 words
A tool according to claim 1 comprising a switch for controlling said power means and actuatable in either of two directions, the arrangement being such that movement of the switch in one direction is effective to energize an air motor for rotatably driving said sleeve and mandrel-pulling means, and movement of the switch in the other direction is effective to relatively retract the mandrel-pulling means for rivet setting.
Claim 8
Dependent Claim
66 words
A tool according to claim 1 wherein said mandrel-pulling means comprises a jaw case having an internal tapering surface at its forward end, a pair of mandrel-gripping jaws slidable in the case, and spring means in the case for yieldably urging the jaws toward said surface, said jaws being intergral with a collet keyed to the jaw case and resiliently urged apart radially of said sleeve.
Claim 9
Dependent Claim
46 words
A tool according to claim 1 wherein the mandrel-pulling means comprises a jaw case having an internal tapering surface, and a pair of separate cooperative jaw members complemental to said surface spring-urged against said surface, the jaw members being restrained against relative rotation in the case.
Claim 10
Dependent Claim
61 words
A tool as in claim 8 comprising a jaw stop releasably held in retracted position, when the jaw case is in its foremost position in the tool, to hold the jaws separated for admission therebetween of a mandrel-rivet to be installed, release of the stop allowing the jaws to move forwardly to confine a portion of the stem of said mandrel-rivet.
Claim 11
Dependent Claim
42 words
A tool as in claim 9 wherein the jaw stop comprises an annular plate held in its retracted position by ball catches accommodated in holes in said sleeve and releasable therefrom by an internally grooved member axially movably mounted on the sleeve.
Claim 12
Dependent Claim
32 words
A tool as in claim 8 wherein the mandrel-pulling means comprises means rotatable with the jaw case to confine a non-cylindrical portion of the mandrel stem for driving during the drilling operation.
Claim 13
Dependent Claim
58 words
A tool as in claim 11 wherein the means to confine a non-cylindrical portion of the mandrel stem comprises a second set of jaws forming part of a collet, the second set of jaws being urged apart by resilience of the collet but restrained from separation, when closed about said stem, by a member embracing the closed jaws.
Claim 14
Dependent Claim
31 words
A tool as in claim 11 wherein the means for retracting the mandrel-pulling means is a piston coupled to a drawbar and slidable in a cylinder in response to hydraulic pressure.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-22 | 1979-03-24 | 1979-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-22 | 1983-03-24 | 1983-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-22 | 1987-03-24 | 1987-09-23 | $7700.00 | Window Closed / Lapsed |