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US3908977A Expired / Lapsed US ⏱️ 0.0 years remaining

Ultrahigh vacuum mounting fixture

Assignee: United States Department of the Interior
•
Filing: 1974-04-03
•
Granted: 1975-09-30
•
Expires: 1994-04-03
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Abstract

Abstract A universal ultrahigh vacuum mounting fixture. The device is an expansion fitting specifically designed for ultrahigh vacuum (UHV) compatibility. A tapered plug has its front end inserted in a complementary shaped tapered hole in a sleeve. This sleeve has evenly spaced longitudinal slots that extend part of the way along and through the tapered surface. When in place, the sleeve extends through the wall of a vacuum chamber fitting into a vacuum flange mounting tube. A tightening bolt extends through the plug so that it may be turned from the rear of the plug pulling the plug into the sleeve to rigidly expand the sleeve inside the flange mounting rigidly fixing the plug and sleeve in the flange mounting tube. A variety of different types of mounting posts may be attached to the front end of the plug to protrude into the chamber and mount the device under observation. The complementary tapers of the plug and hole are usually different with the plug having a greater taper. Because of the ultrahigh vacuum environment of the chamber, it is essential that only ultrahigh vacuum compatible materials like 300 series stainless steel, be used in constructing the invention.

Inventors

  • 👤 Wallace W Roepke
  • 👤 Alexander I Grabowski

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-07 20:22
CPC Classifications
H; H01; H01J; H01J37/00; H01J37/02; H01J37/18; Y; Y10; Y10T; Y10T403/00; Y10T403/53; Y10T403/535

Claims Analysis

Total Claims: 11
Claim 1
Independent Claim 134 words
A mounting assembly for use with an ultrahigh vacuum chamber comprising: an elongated hollow open ended tapered sleeve with a plurality of spaced longitudinal slots extending from the hollow open end to part way up the sleeve; a tapered plug having means for receiving a tightening member insertable within the hollow open end of said sleeve; a tightening member insertable in said plug''s means for receiving a tightening member for expanding said plug upon tightening and for retaining the plug within the sleeve; said tightening member having means for allowing the escape of gas trapped by said plug and tightening member in said ultrahigh vacuum chamber as said member is tightened; and a mounting post fastened to the end of the sleeve opposite its hollow open end for mounting a device in a chamber.
Claim 2
Dependent Claim 134 words
A mounting assembly for use with an ultrahigh vacuum chamber comprising: an elongated hollow open ended tapered sleeve with a plurality of spaced longitudinal slots extending from the hollow open end to part way up the sleeve; a tapered plug having means for receiving a tightening member insertable within the hollow open end of said sleeve; a tightening member insertable in said plug''s means for receiving a tightening member for expanding said plug upon tightening and for retaining the plug within the sleeve; said tightening member having means for allowing the escape of gas trapped by said plug and tightening member in said ultrahigh vacuum chamber as said member is tightened; and a mounting post fastened to the end of the sleeve opposite its hollow open end for mounting a device in a chamber.
Claim 3
Dependent Claim 21 words
The assembly of claim 1 wherein said tightening member is inserted in the plug end having the largest cross sectional area.
Claim 4
Dependent Claim 22 words
The assembly of claim 2 wherein both said plug and tightening member have gas passageways to assist in degassing the assembled unit.
Claim 5
Dependent Claim 31 words
The assembly of claim 3 wherein said longitudinal slots are parallel and equally spaced from each other around the sleeve and intersect a groove extending partially through and around the sleeve.
Claim 6
Dependent Claim 24 words
The assembly of claim 3 wherein said plug, sleeve and tightening member are made substantially of material from the 300 series of stainless steel.
Claim 7
Dependent Claim 34 words
The assembly of claim 3 wherein said tightening member is a threaded bolt and its gas passageway used to assist the degassing the assembled unit is a longitudinal slot that intersects said bolt threads.
Claim 8
Dependent Claim 21 words
The assembly of claim 1 wherein said tightening member is inserted in the plug end having the smaller cross sectional area.
Claim 9
Dependent Claim 28 words
The assembly of claim 1 wherein the tapers on the plug and sleeve are substantially complementarily shaped with the plug taper being greater than that of the sleeve.
Claim 10
Dependent Claim 25 words
The assembly of claim 8 wherein said post is bent along its length to form an acute angle with the longitudinal centerline of the sleeve.
Claim 11
Dependent Claim 23 words
The assembly of claim 1 wherein said mounting post is made substantially from stainless steel and has an aperture to mount the device.

References Cited (Backward Citations)

US720658A Cited
US1106909A Cited
US1379784A Cited
US3626803A Cited
US3721463A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1978-09-29 1979-03-31 1979-09-30 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-09-29 1983-03-31 1983-09-30 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-09-29 1987-03-31 1987-09-30 $7700.00 Window Closed / Lapsed

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