Patent US3757076A successfully refreshed from Google Patents.
US3757076A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum chamber with static mobile sealing joints
Assignee: Individual
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Filing: 1971-12-20
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Granted: 1973-09-04
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Expires: 1991-12-20
Abstract
Abstract Vacuum chamber for welding apparatus comprisng two bellows skirts coupled together by an upper collar on the top of an electron gun, the lower part of the skirts being located inside one of the others, and mobile continuous joints at the bottom of the skirts being at will alternatively pressed in a fluid tight manner in a static condition against a working table during the whole working operation where the gun walks along a welding line on the table.
Inventors
- 👤 J Peyrot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:41
CPC Classifications
B; B23; B23K; B23K15/00; B23K15/06; H; H01; H01J; H01J37/00; H01J37/02; H01J37/18
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
269 words
A double vacuum chamber with mobile joints comprising a frame movable with respect to a worktable, at least one first chamber inside a second chamber, an electron gun carried by said frame, said chambers hermetically coupled to said electron gun, said first chamber including an upper collar hermetically coupled to said electron gun, a bellows type skirt connected to said upper collar, a first continuous coupling attached at the bottom of said skirt, a sliding joint at the lower part of said first coupling, said second chamber including an upper collar hermetically coupled to said collar of said first chamber, a bellows type skirt connected to said upper collar of said second chamber, a second continuous coupling attached at the bottom of said skirt of said second chamber, a sliding joint at the lower portion of said second coupling, a first hydraulic jack rigidly fixed to said frame, a first piston rod sliding in said first hydraulic jack, a second hydraulic jack located at 180* from said first rod, a second piston rod sliding in said second hydraulic jack, said second coupling being rigidly fixed on the one hand to said first piston rod and on the other hand to said second hydraulic jack, said second piston rod being connected to said first coupling, said couplings and said joints closing said chambers against said worktable on which the work is effected, at least one of said joints connected to said two chambers being alternately pressed in a fluid-tight manner in a static condition against said worktable during all the working operations during which said jacks and pistons operate successively.
Claim 2
Dependent Claim
269 words
A double vacuum chamber with mobile joints comprising a frame movable with respect to a worktable, at least one first chamber inside a second chamber, an electron gun carried by said frame, said chambers hermetically coupled to said electron gun, said first chamber including an upper collar hermetically coupled to said electron gun, a bellows type skirt connected to said upper collar, a first continuous coupling attached at the bottom of said skirt, a sliding joint at the lower part of said first coupling, said second chamber including an upper collar hermetically coupled to said collar of said first chamber, a bellows type skirt connected to said upper collar of said second chamber, a second continuous coupling attached at the bottom of said skirt of said second chamber, a sliding joint at the lower portion of said second coupling, a first hydraulic jack rigidly fixed to said frame, a first piston rod sliding in said first hydraulic jack, a second hydraulic jack located at 180* from said first rod, a second piston rod sliding in said second hydraulic jack, said second coupling being rigidly fixed on the one hand to said first piston rod and on the other hand to said second hydraulic jack, said second piston rod being connected to said first coupling, said couplings and said joints closing said chambers against said worktable on which the work is effected, at least one of said joints connected to said two chambers being alternately pressed in a fluid-tight manner in a static condition against said worktable during all the working operations during which said jacks and pistons operate successively.
Claim 3
Dependent Claim
41 words
A double vacuum chamber in accordance with claim 1, further characterized by said rods slidable in their respective said jacks for a distance which is twice the free space inside said first coupling in the direction of movement of said frame.
Claim 4
Dependent Claim
135 words
A double vacuum chamber in accordance with claim 2, further characterized by the displacement of an electron beam which is propagated in the interior of said first chamber between said gun and said worktable on which welding is effected in a continuous manner, said first jack displacing said second coupling in a first jump ahead of the path of the electron beam on the outside of said first coupling during a first stage, said second jack displacing said first coupling by a second jump ahead of the path of the electron beam inside said second coupling during a second stage, at least one of said joints applied in a static manner against said worktable during the relative movement of the other said joint thereby ensuring the fluid tightness of said double chamber at every instant.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |