Patent US4744594A successfully refreshed from Google Patents.
US4744594A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum handling especially for the use in handling silicon wafers
Assignee: Recif SA
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Filing: 1986-12-10
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Granted: 1988-05-17
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Expires: 2006-12-10
Abstract
Abstract The object of this invention relates to the technical sector of microelectronics. The vacuum handling system according to the invention comprises a hollow body (1) of which the end takes the gripping tip forming an inside chamber (1b) with at least two annular grooves (1b1) and (1b2) for the positioning of two O rings (7) of a soft deformable material to insure, on the one hand the dismantable assembling of the part corresponding to the tip, and, on the other hand, the vacuum tightness.
Inventors
- 👤 Bernard Poli
- 👤 Gerard Chincholle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:47
CPC Classifications
B; B25; B25B; B25B11/00; B25B11/005; B25B11/007; H; H10; H10P; H10P72/00; H10P72/70; H10P72/78
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
246 words
An elongated tubular holder for silicon wafers and the like comprising an elongated hollow tube, said tube being opened at one end and defining a socket portion and a hollow portion at the other end, a solid means separating said socket portion and said hollow portion, said hollow portion having means whereby to connect it to a vacuum source to produce diminished gas pressure in said hollow portion, said solid means having an axial bore therethrough thereby connecting said socket portion and said hollow portion, a first transverse bore completely through said solid means intersects said axial bore, a reciprocable elongated means positioned in said first transverse bore having a plug portion to selectively completely interrupt said axial bore, said reciprocable elongated means having at each end axle means extending beyond said first transverse bore, a second transverse bore in said solid means axially displaced from said first transverse bore which intersects said axial bore, a movable plug positioned in said second transverse bore to selectively completely interrupt said axial bore, spring means operatively connected to said plug to urge said plug in a radial direction externally of said second transverse bore, a lever means, said lever means manually operatively articulated to impinge on said plug extending from said second transverse bore, said lever means being pivotally mounted on said axle means, said lever means when manually depressed in the direction of the solid means thrusts said plug in a manner to interrupt said axial bore.
Claim 2
Dependent Claim
246 words
An elongated tubular holder for silicon wafers and the like comprising an elongated hollow tube, said tube being opened at one end and defining a socket portion and a hollow portion at the other end, a solid means separating said socket portion and said hollow portion, said hollow portion having means whereby to connect it to a vacuum source to produce diminished gas pressure in said hollow portion, said solid means having an axial bore therethrough thereby connecting said socket portion and said hollow portion, a first transverse bore completely through said solid means intersects said axial bore, a reciprocable elongated means positioned in said first transverse bore having a plug portion to selectively completely interrupt said axial bore, said reciprocable elongated means having at each end axle means extending beyond said first transverse bore, a second transverse bore in said solid means axially displaced from said first transverse bore which intersects said axial bore, a movable plug positioned in said second transverse bore to selectively completely interrupt said axial bore, spring means operatively connected to said plug to urge said plug in a radial direction externally of said second transverse bore, a lever means, said lever means manually operatively articulated to impinge on said plug extending from said second transverse bore, said lever means being pivotally mounted on said axle means, said lever means when manually depressed in the direction of the solid means thrusts said plug in a manner to interrupt said axial bore.
Claim 3
Dependent Claim
62 words
The elongated tubular holder for silicon wafers and the like of claim 1 including ear extensions on each side of said lever means beyond the pivotal mount on said axle means and said lever means has a U-shaped configuration with the underside of the portion connecting the legs of the U-shaped lever means in operative contact with an end of said plug.
Claim 4
Dependent Claim
38 words
The elongated tubular holder for silicon wafers and the like of claim 2 wherein second transverse bore is a blind end bore and said spring means is positioned between said blind end and one end of said plug.
Claim 5
Dependent Claim
55 words
The elongated tubular holder for silicon wafers and the like of claim 2 wherein the holder is mounted at an angle from the horizontal in a support means, said support means having oblique slots adapted and constructed to actuate said lever means through said ear extensions whereby to have said plug interrupt said axial bore.
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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) | 1991-05-17 | 1991-11-16 | 1992-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-17 | 1995-11-16 | 1996-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-17 | 1999-11-16 | 2000-05-17 | $7700.00 | Window Closed / Lapsed |