US5026254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Calibrated pitch change link
Assignee: Boeing Helicopters Co
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Filing: 1989-10-13
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Granted: 1991-06-25
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Expires: 2009-10-13
Abstract
Abstract A calibration device for a pitch change link (10) for a helicopter rotor grip where the link (10) includes a bearing (12) and includes a plurality of sequential reference numbers (22) equally spaced apart and concentrically disposed around the link (10). An indexing device (30) is mounted to the bearing (12) and is disposed adjacent to the plurality of sequential reference numbers (22) for locating one of the plurality of reference numbers (22) representing the length of the link (10). The indexing device (30) includes a window (40) which indexes one of the plurality of reference numbers (22) as the link (10) rotates.
Inventors
- 👤 Russell W. Ford
- 👤 David S. Shepherd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:50
CPC Classifications
F; F16; F16C; F16C7/00; F16C7/06; B; B64; B64C; B64C27/00; B64C27/008; B64C27/54; F16C2326/00; F16C2326/43; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2142; Y10T74/2151
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
71 words
A calibration device for a pitch change link for a helicopter rotor grip, the link including a bearing, comprising: a plurality of position indicia concentrically disposed and spaced apart around the link and including sequential reference numbers equally spaced along the link representing the length of the link; and means for indexing mounted to the bearing and disposed adjacent to the link for locating one of said plurality of positioned indicia.
Claim 2
Dependent Claim
71 words
A calibration device for a pitch change link for a helicopter rotor grip, the link including a bearing, comprising: a plurality of position indicia concentrically disposed and spaced apart around the link and including sequential reference numbers equally spaced along the link representing the length of the link; and means for indexing mounted to the bearing and disposed adjacent to the link for locating one of said plurality of positioned indicia.
Claim 3
Dependent Claim
25 words
The calibration device of claim 1 wherein said indexing means includes: sight means for aligning and identifying one of said plurality of said position indicia.
Claim 4
Dependent Claim
75 words
A calibration device for a pitch change link for a helicopter rotor grip, the link including a bearing, comprising: a plurality of sequential reference numbers equally spaced apart and concentrically spaced around the link; and a window for viewing said plurality of sequential reference numbers mounted to the bearing and disposed adjacent to said plurality of sequential reference numbers for locating one of said plurality of sequential reference numbers representing the length of the link.
Claim 5
Dependent Claim
75 words
A calibration device for a pitch change link for a helicopter rotor grip, the link including a bearing, comprising: a plurality of sequential reference numbers equally spaced apart and concentrically spaced around the link; and a window for viewing said plurality of sequential reference numbers mounted to the bearing and disposed adjacent to said plurality of sequential reference numbers for locating one of said plurality of sequential reference numbers representing the length of the link.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-06-24 | 1994-12-24 | 1995-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-06-24 | 1998-12-24 | 1999-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-06-24 | 2002-12-24 | 2003-06-25 | $7700.00 | Window Closed / Lapsed |