Patent US4717263A successfully refreshed from Google Patents.
US4717263A
Expired / Lapsed
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Gas bearing
Assignee: COMPACT SPINDLE BEARING CORP
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Filing: 1986-12-08
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Granted: 1988-01-05
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Expires: 2006-12-08
Abstract
Abstract Statically pressurized gas bearings employ improved bearing pockets, each including one or more slots arranged in a double cross, star or other configuration, and supplemental gas exhaust slots, as well as stepped annular land flow restrictors, to optimize bearing stability and operational bandwidth.
Inventors
- 👤 Edward H. Phillips
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:09
CPC Classifications
F; F16; F16C; F16C32/00; F16C32/06; F16C32/0629; F16C32/064; F16C32/0651; F16C32/0659; F16C32/0662; F16C32/0666
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
98 words
A statically pressurized gas bearing comprising: a first bearing part having a bearing surface; a second bearing part having a conforming bearing surface; a gas inlet and an input flow restrictor formed in the second bearing part; a cross bearing pocket comprising slots formed in the conforming bearing surface of the second bearing part and disposed in communication with the input flow restrictor; at least one portion of the cross bearing pocket having a double slot configuration; and at least one supplemental exhaust slot formed within a portion of the cross bearing pocket having the double slot configuration.
Claim 2
Dependent Claim
98 words
A statically pressurized gas bearing comprising: a first bearing part having a bearing surface; a second bearing part having a conforming bearing surface; a gas inlet and an input flow restrictor formed in the second bearing part; a cross bearing pocket comprising slots formed in the conforming bearing surface of the second bearing part and disposed in communication with the input flow restrictor; at least one portion of the cross bearing pocket having a double slot configuration; and at least one supplemental exhaust slot formed within a portion of the cross bearing pocket having the double slot configuration.
Claim 3
Dependent Claim
102 words
A statically pressurized gas bearing as in claim 1 wherein each slot of the cross bearing pocket has an opening dimension, d 3 , chosen between N.sub.2.sup.0.25 L.sup.0.25 g.sub.01.sup.0.75 <d.sub.3 <4N.sub.2.sup.0.25 L.sup.0.25 g.sub.01.sup.0.75, where N 2 is a geometrically determined number of squares arranged orthogonally with respect to the direction of outgoing gas flow across a land surface portion of the conforming bearing surface of the second bearing part, L is the dimension from any crossing slot to the middle of a supplemental exhaust slot and g 01 is the flying height of the gas bearing when the gas bearing is loaded.
Claim 4
Dependent Claim
22 words
A statically pressurized gas bearing as in claim 1 wherein the cross bearing pocket comprises a double cross slot configuration bearing pocket.
Claim 5
Dependent Claim
98 words
A statically pressurized gas bearing comprising: a first bearing part having a bearing surface; a second bearing part having a conforming bearing surface; a gas inlet and an input flow restrictor formed in the second bearing part; a gas bearing pocket, of one or more arms, comprising slots formed in the conforming bearing surface of the second bearing part and disposed in communication with the input flow restrictor; at least one arm of the gas bearing pocket having a double slot configuration; and at least one supplemental exhaust slot formed within an arm having the double slot configuration.
Claim 6
Dependent Claim
98 words
A statically pressurized gas bearing comprising: a first bearing part having a bearing surface; a second bearing part having a conforming bearing surface; a gas inlet and an input flow restrictor formed in the second bearing part; a gas bearing pocket, of one or more arms, comprising slots formed in the conforming bearing surface of the second bearing part and disposed in communication with the input flow restrictor; at least one arm of the gas bearing pocket having a double slot configuration; and at least one supplemental exhaust slot formed within an arm having the double slot configuration.
Claim 7
Dependent Claim
102 words
A statically pressurized gas bearing as in claim 4 wherein each slot of the gas bearing pocket has an opening dimension, d 3 , chosen between N.sub.2.sup.0.25 L.sup.0.25 g.sub.01.sup.0.75 <d.sub.3 <4N.sub.2.sup.0.25 L.sup.0.25 g.sub.01.sup.0.75, where N 2 is a geometrically determined number of squares arranged orthogonally with respect to the direction of outgoing gas flow across a land surface portion of the conforming bearing surface of the second bearing part, L is the dimension from any crossing slot to the middle of a supplemental exhaust slot and g 01 is the flying height of the gas bearing when the gas bearing is loaded.
Claim 8
Dependent Claim
27 words
A statically pressurized gas bearing as in claim 4 wherein each arm of the gas bearing pocket has a double slot configuration and a supplemental exhaust slot.
Claim 9
Dependent Claim
69 words
A statically pressurized gas bearing configuration comprising: a gas inlet; an input flow restrictor; a cross bearing pocket comprising slots formed in a bearing surface and disposed in communication with the input flow restrictor; a least one portion of the cross bearing pocket having a double slot configuration; and at least one supplemental exhaust slot formed within a portion of the cross bearing pocket having the double slot configuration.
Claim 10
Dependent Claim
69 words
A statically pressurized gas bearing configuration comprising: a gas inlet; an input flow restrictor; a cross bearing pocket comprising slots formed in a bearing surface and disposed in communication with the input flow restrictor; a least one portion of the cross bearing pocket having a double slot configuration; and at least one supplemental exhaust slot formed within a portion of the cross bearing pocket having the double slot configuration.
Claim 11
Dependent Claim
97 words
A statically pressurized gas bearing configuration as in claim 7 wherein each slot of the cross bearing pocket has an opening dimension, d 3 , chosen between N.sub.2.sup.0.25 L.sup.0.25 g.sub.01.sup.0.75 <d.sub.3 <4N.sub.2.sup.0.25 L.sup.0.25 g.sub.01.sup.0.75, where N 2 is a geometrically determined number of squares arranged orthogonally with respect to the direction of outgoing gas flow across a land surface portion of the bearing surface, L is the dimension from any crossing slot to the middle of a supplemental exhaust slot and g 01 is the flying height of the gas bearing when the gas bearing is loaded.
Claim 12
Dependent Claim
21 words
A statically pressurized gas bearing configuration as in claim 7 wherein the cross bearing pocket comprises a double cross slot configuration.
Claim 13
Dependent Claim
69 words
A statically pressurized gas bearing configuration comprising: a gas inlet; an input flow restrictor; a gas bearing pocket, of one or more arms, comprising slots formed in a bearing surface and disposed in communication with the input flow restrictor; at least one arm of the gas bearing pocket having a double slot configuration; and at least one supplemental exhaust slot formed within each arm having the double slot configuration.
Claim 14
Dependent Claim
69 words
A statically pressurized gas bearing configuration comprising: a gas inlet; an input flow restrictor; a gas bearing pocket, of one or more arms, comprising slots formed in a bearing surface and disposed in communication with the input flow restrictor; at least one arm of the gas bearing pocket having a double slot configuration; and at least one supplemental exhaust slot formed within each arm having the double slot configuration.
Claim 15
Dependent Claim
97 words
A statically pressurized gas bearing configuration as in claim 10 wherein each slot of the gas bearing pocket has an opening dimension, d 3 , chosen between N.sub.2.sup.0.25 L.sup.0.25 g.sub.01.sup.0.75 <d.sub.3 <4N.sub.2.sup.0.25 L.sup.0.25 g.sub.01.sup.0.75, where N 2 is a geometrically determined number of squares arranged orthogonally with respect to the direction of outgoing gas flow across a land surface portion of the bearing surface, L is the dimension from any crossing slot to the middle of a supplemental exhaust slot and g 01 is the flying height of the gas bearing when the gas bearing is loaded.
Claim 16
Dependent Claim
28 words
A statically pressurized gas bearing configuration as in claim 10 wherein each arm of the gas bearing pocket has a double slot configuration and a supplemental exhaust slot.
Claim 17
Dependent Claim
158 words
A statically pressurized gas bearing comprising at least one input flow restrictor for supplying gas to an associated bearing pocket, said input flow restrictor comprising an inwardly offset annular land formed in the a gas bearing between an inlet hole portion of a gas inlet of the gas bearing and the bearing pocket, and said bearing pocket comprising at least one slot formed in the bearing surface, wherein said slot has an opening dimension, d 3 , chosen between N.sub.2.sup.0.25 L.sup.0.25 g.sub.01.sup.0.75 <d.sub.3 <4N.sub.2.sup.0.25 L.sup.0.25 g.sub.01.sup.0.75, where N 2 is a geometrically determined number of squares arranged orthogonally with respect to the direction of outgoing gas flow across a land surface portion of the bearing surface of the gas bearing, L is the dimension from the input flow restrictor to the middle of the longest portion of the bearing pocket slot, and g 01 is the flying height of the gas bearing when the gas bearing is loaded.
Claim 18
Dependent Claim
158 words
A statically pressurized gas bearing comprising at least one input flow restrictor for supplying gas to an associated bearing pocket, said input flow restrictor comprising an inwardly offset annular land formed in the a gas bearing between an inlet hole portion of a gas inlet of the gas bearing and the bearing pocket, and said bearing pocket comprising at least one slot formed in the bearing surface, wherein said slot has an opening dimension, d 3 , chosen between N.sub.2.sup.0.25 L.sup.0.25 g.sub.01.sup.0.75 <d.sub.3 <4N.sub.2.sup.0.25 L.sup.0.25 g.sub.01.sup.0.75, where N 2 is a geometrically determined number of squares arranged orthogonally with respect to the direction of outgoing gas flow across a land surface portion of the bearing surface of the gas bearing, L is the dimension from the input flow restrictor to the middle of the longest portion of the bearing pocket slot, and g 01 is the flying height of the gas bearing when the gas bearing is loaded.
Claim 19
Dependent Claim
39 words
A statically pressurized gas bearing as in claim 13 wherein at least one of the bearing pocket slots comprises a double slot, and a supplemental exhaust slot is formed in the space between the slots forming the double slot.
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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) | 1991-01-04 | 1991-07-06 | 1992-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-04 | 1995-07-06 | 1996-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-04 | 1999-07-06 | 2000-01-05 | $7700.00 | Window Closed / Lapsed |