US3842687A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ballistically tolerant bellcrank/rod-end
Assignee: RTX Corp
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Filing: 1973-12-14
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Granted: 1974-10-22
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Expires: 1993-12-14
Abstract
Abstract A bellcrank and control rod connection configuration achieving projectile damage tolerance through a combination of redundant pivots. Rod ends are connected to a bellcrank in a double pivot fashion so that should either pivot connection become disabled the other pivot connection will permit the maintenance of satisfactory control.
Inventors
- 👤 J Fansler
- 👤 S Okarma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:25
CPC Classifications
B; B64; B64C; B64C13/00; B64C13/24; B64C13/26; B64C13/28; B64C13/30; B64C13/341; G; G05; G05G; G05G7/00; G05G7/02; G05G2700/00; G05G2700/12; G05G2700/16; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32549; Y10T403/32557; Y10T403/32581; Y10T403/32606; Y10T403/32861; Y10T403/32918; Y10T74/00; Y10T74/20; Y10T74/20576; Y10T74/20582
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
75 words
In an aircraft control system, a bellcrank, and at least one control rod connected to said bellcrank, said connection including, first means attaching an end of said control rod to said bellcrank and providing a primary pivot second means adjacent said first means attaching the end of said control rod to said bellcrank and providing a secondary pivot, and means permitting limited relative motion between said bellcrank and said control rod about said primary pivot.
Claim 2
Dependent Claim
75 words
In an aircraft control system, a bellcrank, and at least one control rod connected to said bellcrank, said connection including, first means attaching an end of said control rod to said bellcrank and providing a primary pivot second means adjacent said first means attaching the end of said control rod to said bellcrank and providing a secondary pivot, and means permitting limited relative motion between said bellcrank and said control rod about said primary pivot.
Claim 3
Dependent Claim
24 words
An aircraft control system in accordance with claim 1 in which the means permitting limited relative motion includes an arcuate slot in the bellcrank.
Claim 4
Dependent Claim
71 words
In an aircraft control system, a bellcrank, and a control rod connected to said bellcrank, said connection including: a first pivot whereby bolt-like means connects said bellcrank and control rod through a hole in the bellcrank and a corresponding hole in the control rod, and a second pivot whereby bolt-like means also connects said bellcrank and control rod through a hole in the control rod and a slot in the bellcRank.
Claim 5
Dependent Claim
71 words
In an aircraft control system, a bellcrank, and a control rod connected to said bellcrank, said connection including: a first pivot whereby bolt-like means connects said bellcrank and control rod through a hole in the bellcrank and a corresponding hole in the control rod, and a second pivot whereby bolt-like means also connects said bellcrank and control rod through a hole in the control rod and a slot in the bellcRank.
Claim 6
Dependent Claim
31 words
An aircraft control system in accordance with claim 3 in which the bellcrank is in arcuate form permitting limited rotational movement of the bellcrank and control rod about the first pivot.
Claim 7
Dependent Claim
38 words
An aircraft control system in accordance with claim 3 in which the first pivot is adjacent an end of said control rod and the second pivot is adjacent said first pivot but further removed from the rod end.
Claim 8
Dependent Claim
30 words
An aircraft control system in accordance with claim 3 in which the first pivot includes means providing for relatively friction-free movement of the control rod with respect to the bellcrank.
Claim 9
Dependent Claim
23 words
An aircraft control system in accordance with claim 4 in which the control rod has finger like projections for receiving the bellcrank therebetween.
Claim 10
Dependent Claim
38 words
An aircraft control system in accordance with claim 3 in which the second pivot is adjacent an end of said control rod and the first pivot is adjacent said second pivot but further removed from the rod end.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |