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US4533186A Expired / Lapsed US ⏱️ 0.0 years remaining

Cylindrical type squeeze bearing systems with bearing and driving elements attached in areas of maximum deflection

Assignee: International Business Machines Corp
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Filing: 1983-02-28
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Granted: 1985-08-06
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Expires: 2003-02-28
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Abstract

Abstract A sleeve/rod type squeeze bearing system is disclosed in which the cross-sectional geometry of the piezoceramic bearing driving element is geometrically dissimilar to the cross-sectional geometry of the bearing element to which it is connected. The arrangement permits the cross-sectional geometries of both bearing elements and the piezoceramic driving element to be optimized to perform their intended functions.

Inventors

  • 👤 Mats A. Engwall
  • 👤 Richard B. Mulvany

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-05 15:29
CPC Classifications
F; F16; F16C; F16C32/00; F16C32/06; F16C32/0603; F16C32/0607; F16C32/0611

Claims Analysis

Total Claims: 9
Claim 1
Independent Claim 184 words
A squeeze bearing system comprising: a piezoelectric driving element having an operating frequency and antinodes when vibrating at said operating frequency; a first bearing element also having antinodes at said operating frequency, said driving element and said first bearing element being coaxially nested about a longitudinal axis and spaced-apart radially about said axis, the radial spacing varying with angular position about said axis such that the configurations of said driving element and said first bearing element at cross sections perpendicular to said axis have substantially different geometric shapes; a second bearing element coaxial with and radially spaced from said first bearing element; and means, extending across the radial spacing between said driving element and said first bearing element at areas thereon determined by the location of said antinodes, for connecting said driving element to said first bearing element and for supporting said driving element and said first bearing element in their spaced-apart relationship, whereby when said driving element vibrates at said operating frequency said first bearing element changes its cross-sectional configuration cyclically to create a squeeze film between said first and second bearing elements.
Claim 2
Dependent Claim 184 words
A squeeze bearing system comprising: a piezoelectric driving element having an operating frequency and antinodes when vibrating at said operating frequency; a first bearing element also having antinodes at said operating frequency, said driving element and said first bearing element being coaxially nested about a longitudinal axis and spaced-apart radially about said axis, the radial spacing varying with angular position about said axis such that the configurations of said driving element and said first bearing element at cross sections perpendicular to said axis have substantially different geometric shapes; a second bearing element coaxial with and radially spaced from said first bearing element; and means, extending across the radial spacing between said driving element and said first bearing element at areas thereon determined by the location of said antinodes, for connecting said driving element to said first bearing element and for supporting said driving element and said first bearing element in their spaced-apart relationship, whereby when said driving element vibrates at said operating frequency said first bearing element changes its cross-sectional configuration cyclically to create a squeeze film between said first and second bearing elements.
Claim 3
Dependent Claim 25 words
A squeeze bearing system according to claim 1, wherein said means for connecting comprises a plurality of ribs extending between said areas at said antinodes.
Claim 4
Dependent Claim 38 words
A squeeze bearing system according to claim 1, wherein said bearing elements have the same geometric configuration at cross sections to said axis and wherein the cross-section of either said driving element or said bearing elements is non-circular.
Claim 5
Dependent Claim 27 words
A squeeze bearing system according to claim 3, wherein each element with a non-circular cross-section is symmetrical about a first plane within which said longitudinal axis lies.
Claim 6
Dependent Claim 27 words
A squeeze bearing system according to claim 4, wherein each element with a non-circular cross-section is symmetrical about a second plane within which said longitudinal axis lies.
Claim 7
Dependent Claim 21 words
A squeeze bearing system according to claim 5, wherein said first plane is disposed at 90 degrees to said second plane.
Claim 8
Dependent Claim 23 words
A squeeze bearing system according to claim 6, wherein each element with a non-circular cross-section has a configuration corresponding generally to an astroid.
Claim 9
Dependent Claim 37 words
A squeeze bearing system according to claim 3, wherein said driving element has a circular cross-section and further comprises a piezoelectric hollow cylinder having one of its cylindrical surfaces in complete contact with a second hollow cylinder.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1988-08-05 1989-02-04 1989-08-06 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1992-08-05 1993-02-04 1993-08-06 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1996-08-05 1997-02-04 1997-08-06 $7700.00 Window Closed / Lapsed

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