US3662957A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low friction track bearing assembly
Assignee: RTX Corp
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Filing: 1970-10-28
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Granted: 1972-05-16
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Expires: 1990-10-28
Abstract
Abstract A low friction track bearing assembly which is supported on a stationary member such as a jet engine housing for movement around an axis which is perpendicular to the axis of rotation of the first bearings, which are adapted to engage the cam track base of a guide channel in a member such as an iris nozzle section driven in a linear direction through a pivotal connection constraining the member to move around an axis perpendicular to the direction of drive, and parallel to the axes of bearings offset from the first bearings and adapted to engage the straight sides of the channel to permit the member to be driven in the desired linear direction without undue resistance owing to misalignment between the bearing assembly and the channel.
Inventors
- 👤 James C Pinto
- 👤 Ransom S Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:16
CPC Classifications
F; F02; F02K; F02K1/00; F02K1/06; F02K1/12; F02K1/1261
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
163 words
In a jet engine having a frame and a variable area nozzle comprising a plurality of sections each mounted for linear movement in a certain direction and for pivotal movement at right angles to said certain direction, apparatus comprising means forming a channel having a base and sides in one of said sections, said channel extending generally in said certain direction, a guide bearing assembly comprising a support, a main roller carried by said support for movement around a first axis, means carried by said support for engaging the sides of said channel in response to misalignment between said channel and said guide bearing assembly for exerting a torque on said support permitting movement of said roller around a second axis generally mutually perpendicular to said certain direction and to said first axis and means mounting said support on said frame around said second axis with said main roller engaging said channel base and having its axis generally perpendicular to said certain direction.
Claim 2
Dependent Claim
163 words
In a jet engine having a frame and a variable area nozzle comprising a plurality of sections each mounted for linear movement in a certain direction and for pivotal movement at right angles to said certain direction, apparatus comprising means forming a channel having a base and sides in one of said sections, said channel extending generally in said certain direction, a guide bearing assembly comprising a support, a main roller carried by said support for movement around a first axis, means carried by said support for engaging the sides of said channel in response to misalignment between said channel and said guide bearing assembly for exerting a torque on said support permitting movement of said roller around a second axis generally mutually perpendicular to said certain direction and to said first axis and means mounting said support on said frame around said second axis with said main roller engaging said channel base and having its axis generally perpendicular to said certain direction.
Claim 3
Dependent Claim
77 words
Apparatus as in cLaim 1 in which said torque exerting means comprises an auxiliary roller and means mounting said auxiliary roller on said support for rotary movement around a third axis generally parallel to and spaced from said second axis and spaced from said first axis to cause said auxiliary roller to exert a torque on said support around said second axis upon engagement with said side in response to misalignment between said surface and said assembly.
Claim 4
Dependent Claim
57 words
Apparatus as in claim 1 in which said torque exerting means comprises a pair of auxiliary rollers and means mounting said auxiliary rollers on said support for movement around respective third and fourth axes which are generally parallel to said second axis and which are spaced from said first axis on opposite sides thereof in said direction.
Claim 5
Dependent Claim
23 words
Apparatus as in claim 3 in which each of said auxiliary rollers has a diameter approximately equal to the distance between said sides.
Claim 6
Dependent Claim
109 words
Apparatus as in claim 1 in which said torque applying means comprises respective first and second pairs of auxiliary rollers, means mounting the rollers of the first pair on said support adjacent to one of said channel sides for rotary movement around respective third and fourth axes which are generally parallel to said second axis and which are spaced therefrom in said direction on opposite sides thereof, and means mounting the rollers of said second pair on said support adjacent to the other channel side for movement around respective fifth and sixth axes generally parallel to said second axis and spaced therefrom in said direction on opposite sides thereof.
Claim 7
Dependent Claim
18 words
Apparatus as in claim 1 in which said channel base is a cam track for pivoting said section.
Claim 8
Dependent Claim
23 words
Apparatus as in claim 1 in which said support mounting means comprises a torsionally resilient element extending between said frame and said support.
Claim 9
Dependent Claim
11 words
Apparatus as in claim 6 in which said element is laminated.
Claim 10
Dependent Claim
20 words
Apparatus as in claim 1 in which said mounting means comprises a pivotal connection between said support and said frame.
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) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |