US3630067A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid pressure operated head for setting mandrel rivets
Assignee: Emhart Industries Inc
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Filing: 1970-04-30
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Granted: 1971-12-28
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Expires: 1990-04-30
Abstract
Abstract A fluid pressure operated tool, is disclosed for setting blind rivets by pulling and breaking their mandrels. In addition to including means for ejecting the spent mandrel portion, the rivet head has mechanism for ensuring that its mandrel gripping jaw close prior to exerting substantial mandrel tension, open at the end of the mandrel pulling stroke, and allow reloading of the head with retention of the next mandrel rivet to be installed.
Inventors
- 👤 James N Henshaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:08
CPC Classifications
B; B21; B21J; B21J15/00; B21J15/10; B21J15/30; B21J15/32; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/53709; Y10T29/53717; Y10T29/53726; Y10T29/5373; Y10T29/53739; Y10T29/53743
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
141 words
In a fluid pressure operated head for setting mandrel rivets, a body provided with a mandrel-receiving end for abutting the rivet and fluid pressure mechanism relatively movable axially in the body to tension the mandrel for upsetting the rivet when inserted in a workpiece, said mechanism comprising a jaw case retractable from said body end and having a plurality of guideways disposed at a uniform angle about an axis, mandrel gripping jaws respectively slidable in the guideways, a jawcontrolling member coupled to the jaws to restrain them from displacement relative to one another along the axis, and fluid pressure means for retracting the jaw case to cause the jaws to tension the mandrel, said fluid pressure means being operable on the jaw-controlling member to close the jaws in mandrel gripping relation upon relative movement of the member and the jaw case.
Claim 2
Dependent Claim
141 words
In a fluid pressure operated head for setting mandrel rivets, a body provided with a mandrel-receiving end for abutting the rivet and fluid pressure mechanism relatively movable axially in the body to tension the mandrel for upsetting the rivet when inserted in a workpiece, said mechanism comprising a jaw case retractable from said body end and having a plurality of guideways disposed at a uniform angle about an axis, mandrel gripping jaws respectively slidable in the guideways, a jawcontrolling member coupled to the jaws to restrain them from displacement relative to one another along the axis, and fluid pressure means for retracting the jaw case to cause the jaws to tension the mandrel, said fluid pressure means being operable on the jaw-controlling member to close the jaws in mandrel gripping relation upon relative movement of the member and the jaw case.
Claim 3
Dependent Claim
139 words
A head for setting mandrel rivets, comprising a hollow body having a nosepiece for abutting the rivet of a mandrel rivet and receiving its mandrel stem, said body including in coaxial relative sliding relation a tubular jaw holder and a jaw-controlling member, cooperative mandrel gripping jaws within the nosepiece, slidable in the holder, and coupled at their rear ends to the member, piston means respectively operative in spaced cylinder portions of the body and respectively connected to the jaw holder and the jaw-controlling member, and fluid pressure means for actuating the piston means to cause the jaw holder to retract from the nosepiece after closure of the gripping jaws to seize and tension the mandrel, and, before the jaw holder is allowed to return, to relatively return the jaw-controlling member to cause the retracted jaws to release the mandrel.
Claim 4
Dependent Claim
139 words
A head for setting mandrel rivets, comprising a hollow body having a nosepiece for abutting the rivet of a mandrel rivet and receiving its mandrel stem, said body including in coaxial relative sliding relation a tubular jaw holder and a jaw-controlling member, cooperative mandrel gripping jaws within the nosepiece, slidable in the holder, and coupled at their rear ends to the member, piston means respectively operative in spaced cylinder portions of the body and respectively connected to the jaw holder and the jaw-controlling member, and fluid pressure means for actuating the piston means to cause the jaw holder to retract from the nosepiece after closure of the gripping jaws to seize and tension the mandrel, and, before the jaw holder is allowed to return, to relatively return the jaw-controlling member to cause the retracted jaws to release the mandrel.
Claim 5
Dependent Claim
62 words
A rivet setting head as set forth in claim 2 wherein an expulsion tube extends axially in the tubular jaw holder rearwardly from said jaws, and pneumatic means operatively connected to said tube is adapted to expel successive spent mandrel stems rearwardly therefrom, said pneumatic means facilitating retention in the nosepiece of mandrel rivets prior to their being gripped by said jaws.
Claim 6
Dependent Claim
34 words
A rivet setting head as set forth in claim 2 wherein the rearward ends of each of said jaws has a T-shaped connection with said jaw-controlling memBer whereby their relative axial disposition is maintained.
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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) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |