Patent US324875A successfully refreshed from Google Patents.
Patent US3758053A successfully refreshed from Google Patents.
US3758053A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual input cable
Assignee: RTX Corp
•
Filing: 1971-09-16
•
Granted: 1973-09-11
•
Expires: 1991-09-16
Abstract
Abstract Control system for a helicopter which includes a cable arrangement in which a core wire connects the pilot''s engine speed control lever and the engine fuel control and a sheath surrounding the core wire is connected to the collective pitch stick so that collective pitch inputs can bias fuel flow and with a connection for deactivating the collective pitch input at ground idle operation.
Inventors
- 👤 A Amelio
- 👤 D Naples
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:00
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/32; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20396; Y10T74/20402; Y10T74/2042
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
153 words
A control system for a helicopter; said helicopter including an engine, a fuel metering device for the engine, and pilot operated controls including an engine speEd control lever and a collective pitch stick; said control lever having operational positions including ground idle and flight; connecting means between said control lever and said metering device having a portion thereof mounted in a bent form; said connecting means including one element connecting said control lever and said metering device to vary engine speed; a second element for said connecting means having one end relatively fixed and a portion capable of movement with respect to said one element; means for moving said portion of said second element; means connecting said collective pitch stick and said moving means for varying engine speed independently of said control lever; and means limiting movement of said portion of said second element when said control lever is in ground idle position.
Claim 2
Dependent Claim
153 words
A control system for a helicopter; said helicopter including an engine, a fuel metering device for the engine, and pilot operated controls including an engine speEd control lever and a collective pitch stick; said control lever having operational positions including ground idle and flight; connecting means between said control lever and said metering device having a portion thereof mounted in a bent form; said connecting means including one element connecting said control lever and said metering device to vary engine speed; a second element for said connecting means having one end relatively fixed and a portion capable of movement with respect to said one element; means for moving said portion of said second element; means connecting said collective pitch stick and said moving means for varying engine speed independently of said control lever; and means limiting movement of said portion of said second element when said control lever is in ground idle position.
Claim 3
Dependent Claim
105 words
A fuel control for a helicopter having a connection with engine speed control means and a collective pitch stick; said connection including a wire encased in a sheath with said connection being mounted in a bowed arrangement; said speed control means being linked directly to said fuel control by said wire; said sheath having one end fixed against movement; means for shifting the position of the other end of said sheath in accordance with movement of said collective pitch stick; and means activated by said speed control means for limiting position shifting of said sheath other end in certain positions of said speed control means.
Claim 4
Dependent Claim
105 words
A fuel control for a helicopter having a connection with engine speed control means and a collective pitch stick; said connection including a wire encased in a sheath with said connection being mounted in a bowed arrangement; said speed control means being linked directly to said fuel control by said wire; said sheath having one end fixed against movement; means for shifting the position of the other end of said sheath in accordance with movement of said collective pitch stick; and means activated by said speed control means for limiting position shifting of said sheath other end in certain positions of said speed control means.
Claim 5
Dependent Claim
131 words
A fuel control for a helicopter having a connection with engine speed control means and a collective pitch stick; said connection including a wire encased in a sheath with said connection being mounted in a bowed arrangement; means linking said speed control means to said wire and to said fuel control; said sheath having an end fixed against movement; means for shifting the position of the other end of said sheath in accordance with movement of said collective pitch stick; cam means operatively associated with said speed control linking means; lever means actuated by said cam means; abutting means on said other end of said sheath; and means connecting said lever means and said abutting means to limit shifting of said abutting means in certain positions of said speed control means.
Claim 6
Dependent Claim
131 words
A fuel control for a helicopter having a connection with engine speed control means and a collective pitch stick; said connection including a wire encased in a sheath with said connection being mounted in a bowed arrangement; means linking said speed control means to said wire and to said fuel control; said sheath having an end fixed against movement; means for shifting the position of the other end of said sheath in accordance with movement of said collective pitch stick; cam means operatively associated with said speed control linking means; lever means actuated by said cam means; abutting means on said other end of said sheath; and means connecting said lever means and said abutting means to limit shifting of said abutting means in certain positions of said speed control means.
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) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |