Patent US4047682A successfully refreshed from Google Patents.
US4047682A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fan cowl translation lock
Assignee: Rolls Royce PLC
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Filing: 1976-10-13
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Granted: 1977-09-13
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Expires: 1996-10-13
Abstract
Abstract A gas turbine engine cowl has a portion which translates axially of the remainder, to open or close a reverser gas flow gap. A yoke is attached to the fixed cowl upstream of the gap which yoke is engageable with a member on the translating cowl portion, by dropping thereover as the cowl portion closes the gap. Translation of the cowl portion actuates an abutment via a cam mechanism to release the yoke at such a time as to prevent the yoke dropping too soon, which would result in the cowl portion being unlocked.
Inventors
- 👤 Frank Denison Brownhill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:59
CPC Classifications
B; B64; B64D; B64D29/00; B64D29/06; F; F02; F02K; F02K1/00; F02K1/54; F02K1/64; F05; F05D; F05D2250/00; F05D2250/30; F05D2250/34
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
202 words
A gas turbine engine cowl structure comprising: a first cowl part; a second cowl part, said second cowl part being translatable axially of and relative to said first cowl part to open or close a gap; a latch operable to engage said second cowl part to prevent relative translation of said first cowl part and said second cowl part to open the gap; and latch operation delaying means comprising a movable latch abutment member which in one position abuts said latch to prevent said latch from engaging said second cowl part, said abutment member being mounted on a rotary member, said rotary member comprising a tube having a slot in one side thereof with one end of the slot formed into a cam surface, cam surface engaging means for engaging said slot and for causing rotation of said tube when engaging the cam surface of said slot, said cam surface engaging means engaging said cam surface immediately prior to termination of relative translation of said first cowl part and said second cowl part when closing the gap to cause rotation of said tube with said abutment member clearing said latch whereby said latch can move into engagement with said second cowl part.
Claim 2
Dependent Claim
202 words
A gas turbine engine cowl structure comprising: a first cowl part; a second cowl part, said second cowl part being translatable axially of and relative to said first cowl part to open or close a gap; a latch operable to engage said second cowl part to prevent relative translation of said first cowl part and said second cowl part to open the gap; and latch operation delaying means comprising a movable latch abutment member which in one position abuts said latch to prevent said latch from engaging said second cowl part, said abutment member being mounted on a rotary member, said rotary member comprising a tube having a slot in one side thereof with one end of the slot formed into a cam surface, cam surface engaging means for engaging said slot and for causing rotation of said tube when engaging the cam surface of said slot, said cam surface engaging means engaging said cam surface immediately prior to termination of relative translation of said first cowl part and said second cowl part when closing the gap to cause rotation of said tube with said abutment member clearing said latch whereby said latch can move into engagement with said second cowl part.
Claim 3
Dependent Claim
29 words
A gas turbine engine cowl structure as claimed in claim 1 in which said cam surface engaging means is operatively mounted on said second cowl part for movement therewith.
Claim 4
Dependent Claim
54 words
A gas turbine engine cowl structure as claimed in claim 1 wherein said first cowl part is fixed and said second cowl part is movable, said rotary member being operatively carried on said first cowl part an wherein said cam surface engaging means is operatively mounted on said second cowl part for movement therewith.
Claim 5
Dependent Claim
64 words
A gas turbine engine cowl structure as claimed in claim 1 wherein said cam surface engaging means comprises a roller mounted for translation with said second cowl part, said roller engaging said slot in said tube and acting upon said cam surface immediately prior to the termination of the relative translation of the first cowl part and second cowl part to close the gap.
Claim 6
Dependent Claim
33 words
A gas turbine engine cowl structure as claimed in claim 1 wherein said rotary member is mounted for rotation about an axis parallel with the direction of translation of said second cowl part.
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) | 1980-09-12 | 1981-03-14 | 1981-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-12 | 1985-03-14 | 1985-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-12 | 1989-03-14 | 1989-09-13 | $7700.00 | Window Closed / Lapsed |