US3835291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electron beam welding machine with split seal means
Assignee: Sciaky Brothers Inc
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Filing: 1973-02-16
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Granted: 1974-09-10
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Expires: 1993-02-16
Abstract
Abstract A sealing device for sealing cylindrical objects passing through a wall of a vacuum chamber and which are to be rotated about their longitudinal axes comprising a two part annular resilient seal separable along a plane passing through a diameter of the seal. The parts are installed one on each section of a wall of the chamber which has been split into two parts which may be moved in relation to one another so that when the wall sections are separated the seal parts are separated and the inside of the vacuum chamber is accessible so that the cylindrical objects may be positioned part inside the chamber and the remainder extending outside the chamber. When the wall sections are brought to the closed position the seal parts meet along the plane and surround the cylinder so as to form an effective vacuum seal between wall and cylinder. Means are provided in the resilient seal for preventing leakage of air into the chamber along the interface between the two seal parts when the cylindrical objects are in rotation.
Inventors
- 👤 D Sciaky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:41
CPC Classifications
B; B23; B23K; B23K15/00; B23K15/06; F; F16; F16J; F16J15/00; F16J15/16; F16J15/32; F16J15/3268; F16J15/3272; F16J15/54; Y; Y10; Y10S; Y10S277/00; Y10S277/906; Y10S277/913
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
163 words
A device for preventing gas leakage between the surface of a cylinder rotatable about its longitudinal axis and an opening in a wall of a vacuum chamber through which the said cylinder passes, comprising an annular resilient seal split along its diameter in a plane passing through the longitudinal axis of said cylinder and separable into two semi-circular parts; an annular groove formed on the inner surface of the said seal so as to form two cylindrical bands on its inner surface separated by said groove; a raised portion above thE said plane which extends radially along one end of each of said semi-circular parts, from the inner surface of the seal to its outer periphery; and a groove having the same dimensions as the said raised portion formed below said plane on the other end of each of said parts - the said raised portion of one separable part interlocking with the radially grooved portion of the other part of the seal.
Claim 2
Independent Claim
163 words
A device for preventing gas leakage between the surface of a cylinder rotatable about its longitudinal axis and an opening in a wall of a vacuum chamber through which the said cylinder passes, comprising an annular resilient seal split along its diameter in a plane passing through the longitudinal axis of said cylinder and separable into two semi-circular parts; an annular groove formed on the inner surface of the said seal so as to form two cylindrical bands on its inner surface separated by said groove; a raised portion above thE said plane which extends radially along one end of each of said semi-circular parts, from the inner surface of the seal to its outer periphery; and a groove having the same dimensions as the said raised portion formed below said plane on the other end of each of said parts - the said raised portion of one separable part interlocking with the radially grooved portion of the other part of the seal.
Claim 3
Dependent Claim
18 words
A sealing device as in claim 1 in which the said raised portion is semi-circular in cross section.
Claim 4
Dependent Claim
32 words
A sealing device as in claim 1 including means to prevent rotation of the said seal with respect to the chamber walls and means to prevent leakage between seal and chamber walls.
Claim 5
Dependent Claim
13 words
A sealing device incorporating a multiplicity of the seals described in claim 1.
Claim 6
Dependent Claim
87 words
A device as in claim 1 in which the said parts are mounted in an opening on the wall of a vacuum chamber which is split into two parts along a line which lies in the aforementioned plane, the said wall parts movable one with respect to the other in their common plane in a direction perpendicular to the said line of split so as to separate at least one seal part from the aforementioned tube and to give access to the interior of the vacuum chamber.
Claim 7
Dependent Claim
23 words
A sealing device as in claim 5 in which the said wall is the wall of an electron beam welding machine vacuum chamber.
Claim 8
Dependent Claim
30 words
A sealing device as in claim 5 installed on a wall of an electron beam welding machine which includes means for rotating the said cylindrical objects about their longitudinal axis.
Claim 9
Dependent Claim
35 words
A sealing device as in claim 5 installed on a wall of an electron beam welding machine which includes means for rotating the said cylindrical objects about their longitudinal axis from outside the said chamber.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |