Patent US3811313A successfully refreshed from Google Patents.
US3811313A
Expired / Lapsed
US
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Electromagnetic high energy impact apparatus
Assignee: Boeing Co
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Filing: 1972-12-18
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Granted: 1974-05-21
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Expires: 1992-12-18
Abstract
Abstract An apparatus utilizing electromagnetic energy for producing high impact forces by means of a ram propelled against a work piece. A specific utilization of the apparatus is in the installation of fasteners such as rivets in structural assemblies. The apparatus described herein is the work center of an electromagnetic impact tool and comprises the following components: electromagnetic high energy pulse coil, ram means, aerostatic bearing means and connector means.
Inventors
- 👤 H Schut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:46
CPC Classifications
B; B21; B21J; B21J7/00; B21J7/20; B21J7/22; B21J7/30; B21J15/00; B21J15/10; B21J15/16; B21J15/24; H; H01; H01F; H01F7/00; H01F7/06; H01F7/20; H01F7/202; Y; Y10; Y10T; Y10T83/00; Y10T83/869; Y10T83/8765
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
117 words
In combination in an electromagnetic work tool, a work center comprising: an electromagnetic high energy pulse coil having a working face and coil terminal leads; ram means including a conductive driving plate and a workpiece forming die; aerostatic coil face bearing means including first and second bearing surfaces, said first and second bearing surfaces comprising opposing surfaces of said working face and said driving plate, means including a supply channel for coupling said bearing surfaces in fluid flow path with fluid input means, said means for coupling said bearing surfaces further including a restriction in series therewith for causing a pressure drop in pressurized fluid passing through said channel to substantially atmospheric pressure between said bearing surfaces.
Claim 2
Dependent Claim
117 words
In combination in an electromagnetic work tool, a work center comprising: an electromagnetic high energy pulse coil having a working face and coil terminal leads; ram means including a conductive driving plate and a workpiece forming die; aerostatic coil face bearing means including first and second bearing surfaces, said first and second bearing surfaces comprising opposing surfaces of said working face and said driving plate, means including a supply channel for coupling said bearing surfaces in fluid flow path with fluid input means, said means for coupling said bearing surfaces further including a restriction in series therewith for causing a pressure drop in pressurized fluid passing through said channel to substantially atmospheric pressure between said bearing surfaces.
Claim 3
Dependent Claim
21 words
The combination according to claim 1 wherein said working face forming said first bearing surface comprises a polyimide plastic insulation sheet.
Claim 4
Dependent Claim
46 words
The combination according to claim 1 wherein said ram means includes a ram shaft and insulator plug means separating said driving plate from said ram shaft for electrically isolating the electromagnetic working end of said ram means from the mechanical working end of said ram means.
Claim 5
Dependent Claim
22 words
The combination according to claim 1 further comprising retaining ring means and embedding material for encapsulating said coil in said retaining ring.
Claim 6
Dependent Claim
15 words
The combination according to claim 4 wherein said retaining ring includes a cylindrically shaped shoulder.
Claim 7
Dependent Claim
27 words
The combination according to claim 4 wherein said retaining ring includes slots, said coil terminal leads exiting radially from the side of said coil through said slots.
Claim 8
Dependent Claim
27 words
The combination according to claim 1 wherein said coil includes coil face cavity for coupling said fluid into the region between said first and second bearing surfaces.
Claim 9
Dependent Claim
37 words
The combination according to claim 4 wherein said coil and retaining ring are maintained in interlocked relationship by opposed bevelled surfaces of said ring and the coil outer body having potting material positioned between said bevelled surfaces.
Claim 10
Dependent Claim
18 words
The combInation according to claim 1 wherein said coil terminal leads are clamped to brackets by tapered keys.
Claim 11
Dependent Claim
22 words
The combination according to claim 9 wherein said terminal leads are squeezed between said tapered keys and the sidewalls of said brackets.
Claim 12
Dependent Claim
26 words
The combination according to claim 10 further comprising a plurality of coaxial cables connected in parallel for supplying power from a power source to said coil.
Claim 13
Dependent Claim
38 words
The combination according to claim 11 wherein inner braiding of said plurality of coaxial cables is connected to a first conductive ring and outer braiding of said plurality of coaxial cables is connected to a second conductive ring.
Claim 14
Dependent Claim
29 words
The combination according to claim 12 further comprising tapered sleeves, said conductive braiding being forced between the tapered sleeves and walls of tapered holes in the respective conductive rings.
Claim 15
Dependent Claim
21 words
The combination according to claim 13 wherein said first and second conductive rings are positioned within corresponding ones of said brackets.
Claim 16
Dependent Claim
23 words
The combination according to claim 13 wherein said brackets are of split ring configuration thereby providing clamping of said rings by said brackets.
Claim 17
Dependent Claim
14 words
The combination according to claim 1 wherein said coil includes a mechanical turn-to-turn interlock.
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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) | 1977-05-20 | 1977-11-19 | 1978-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-20 | 1981-11-19 | 1982-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-20 | 1985-11-19 | 1986-05-21 | $7700.00 | Window Closed / Lapsed |