US3675418A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Jet engine force frame
Assignee: RTX Corp
•
Filing: 1970-11-19
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Granted: 1972-07-11
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Expires: 1990-11-19
Abstract
Abstract Apparatus for transferring the axial forces present in the skin of a thin walled, hollow cylinder with little distortion of the skin is disclosed. The invention permits elimination of substantially all ovalization of a gas turbine jet engine case which results from transferring axial forces in the engine to a second body; under some conditions backbone bending of the engine case is also reduced.
Inventors
- 👤 Carl Heinz Lenkeit
- 👤 Cornelius Stephen Conklin Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:00
CPC Classifications
F; F02; F02C; F02C7/00; F02C7/20; Y; Y02; Y02T; Y02T50/00; Y02T50/60
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
157 words
Apparatus for transmitting axial forces to a second body from a gas turbine jet engine enveloped within a case of substantially circular cross section and having an axial center line, including: two attachment members adapted to be connected to the engine case at stations separated by an arc measured about the circumference of the case at substantially the same axial location; an axial load pickup member adapted to be connected to the second body for transmitting the axial loads thereto; means supporting said pickup member on said engine case in circumferential restraint, while permitting limited axial motion thereof, and at a station spaced axially and circumferentially from said attachment members; and a force frame having a single rear leg connecting each of said attachment members to said pickup member and shaped generally to follow the contour of the outer periphery of the engine case and with the single rear leg of the force frame extending substantially axially.
Claim 2
Dependent Claim
157 words
Apparatus for transmitting axial forces to a second body from a gas turbine jet engine enveloped within a case of substantially circular cross section and having an axial center line, including: two attachment members adapted to be connected to the engine case at stations separated by an arc measured about the circumference of the case at substantially the same axial location; an axial load pickup member adapted to be connected to the second body for transmitting the axial loads thereto; means supporting said pickup member on said engine case in circumferential restraint, while permitting limited axial motion thereof, and at a station spaced axially and circumferentially from said attachment members; and a force frame having a single rear leg connecting each of said attachment members to said pickup member and shaped generally to follow the contour of the outer periphery of the engine case and with the single rear leg of the force frame extending substantially axially.
Claim 3
Dependent Claim
22 words
The apparatus according to claim 1 wherein the two attachment members have attachment stations separated by an arc of about 90* .
Claim 4
Dependent Claim
20 words
The apparatus according to claim 1 wherein the two attachment members have stations separated by an arc of about 120*.
References Cited (Backward Citations)
US2587345A
Cited
FR967640A
Cited
US2718756A
Cited
US2818225A
Cited
US3042349A
Cited
DE1526855A1
Cited
US3397855A
Cited
US3561707A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |