US4421349A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cowling latch
Assignee: Boeing Co
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Filing: 1981-12-28
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Granted: 1983-12-20
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Expires: 2001-12-28
Abstract
Abstract A cowling latch for an engine nacelle or the like. The latch characterized by having a collet for engaging a pin extending outwardly from a keeper assembly. The collet when the latch handle is in a closed position secures the pin against the movement of the latch in tension and in shear.
Inventors
- 👤 Alfred H. Greiert, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:51
CPC Classifications
E; E05; E05C; E05C19/00; E05C19/10; E05C19/12; E05C19/14; E05C19/145; B; B64; B64D; B64D29/00; B64D29/06; Y; Y10; Y10S; Y10S292/00; Y10S292/31; Y10T; Y10T292/00; Y10T292/08; Y10T292/0801; Y10T292/082; Y10T292/0825; Y10T292/0826; Y10T292/0829; Y10T292/0886; Y10T292/0887; Y10T292/089; Y10T292/0894; Y10T292/0895; Y10T292/0897; Y10T292/0911; Y10T292/0913; Y10T292/0914; Y10T292/0917
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
234 words
A cowling latch for an engine nacelle or the like, the latch comprising: a keeper assembly having a pin extending outwardly therefrom; a latch assembly having a latch handle pivotally mounted thereon, the latch assembly having a collet expander end plate mounted on one end of the assembly and adjacent the keeper assembly when the assemblies are disposed adjacent each other, the end plate having an aperture therethrough for receiving the pin, the end plate having a circular cam surface surrounding the aperture; and a collet assembly mounted in the latch assembly and having one end linked to the latch handle, the collet assembly receiving one end of the pin therein when the latch handle is in an opened position and the latch assembly is disposed adjacent the keeper assembly, the collet assembly securing the pin therein when the latch handle is in a closed position, the collet having a collet linked to the latch handle, the collet having collet fingers extending outwardly therefrom and received in a circular hollow collet guide, the pin received inside the collet guide and secured by the ends of the collet fingers when the latch handle is in a closed position, the ends of the collet fingers engaging the cam surface of the end plate when the latch handle is open and the cam surface expands the fingers outwardly for releasing the pin received in the collet guide.
Claim 2
Dependent Claim
234 words
A cowling latch for an engine nacelle or the like, the latch comprising: a keeper assembly having a pin extending outwardly therefrom; a latch assembly having a latch handle pivotally mounted thereon, the latch assembly having a collet expander end plate mounted on one end of the assembly and adjacent the keeper assembly when the assemblies are disposed adjacent each other, the end plate having an aperture therethrough for receiving the pin, the end plate having a circular cam surface surrounding the aperture; and a collet assembly mounted in the latch assembly and having one end linked to the latch handle, the collet assembly receiving one end of the pin therein when the latch handle is in an opened position and the latch assembly is disposed adjacent the keeper assembly, the collet assembly securing the pin therein when the latch handle is in a closed position, the collet having a collet linked to the latch handle, the collet having collet fingers extending outwardly therefrom and received in a circular hollow collet guide, the pin received inside the collet guide and secured by the ends of the collet fingers when the latch handle is in a closed position, the ends of the collet fingers engaging the cam surface of the end plate when the latch handle is open and the cam surface expands the fingers outwardly for releasing the pin received in the collet guide.
Claim 3
Dependent Claim
46 words
The latch as described in claim 1 wherein the keeper assembly includes an adjustment wheel mounted therein and threaded around one end of the pin, by rotating the adjustment wheel the pin is moved lengthwise along its axis and inwardly and outwardly from the keeper assembly.
Claim 4
Dependent Claim
211 words
A cowling latch for an engine nacelle or the like, the latch comprising: a keeper assembly having a pin extending outwardly therefrom, the pin having a pin head at one end thereof; a latch assembly having a latch handle pivotally mounted thereon, the latch assembly having a collet expander end plated mounted on one end of the assembly and adjacent the keeper assembly when the assemblies are disposed adjacent each other, the end plate having an aperture for receiving a portion of the pin and the pin head therethrough, the end plate having a circular cam surface around the aperture; and a collet assembly mounted in the latch assembly and including a collet linked to the latch handle, the collet having collet fingers extending outwardly therefrom and received in a circular hollow collet guide, a portion of the pin and the pin head received inside the collet guide when the ends of the collet fingers are secured around the pin head and the latch handle is in a closed position, the ends of the collet fingers engaging the cam surface of the end plate when the latch handle is in an opened position and the cam surface expanding the fingers outwardly for releasing the pin head received in the collet guide.
Claim 5
Dependent Claim
211 words
A cowling latch for an engine nacelle or the like, the latch comprising: a keeper assembly having a pin extending outwardly therefrom, the pin having a pin head at one end thereof; a latch assembly having a latch handle pivotally mounted thereon, the latch assembly having a collet expander end plated mounted on one end of the assembly and adjacent the keeper assembly when the assemblies are disposed adjacent each other, the end plate having an aperture for receiving a portion of the pin and the pin head therethrough, the end plate having a circular cam surface around the aperture; and a collet assembly mounted in the latch assembly and including a collet linked to the latch handle, the collet having collet fingers extending outwardly therefrom and received in a circular hollow collet guide, a portion of the pin and the pin head received inside the collet guide when the ends of the collet fingers are secured around the pin head and the latch handle is in a closed position, the ends of the collet fingers engaging the cam surface of the end plate when the latch handle is in an opened position and the cam surface expanding the fingers outwardly for releasing the pin head received in the collet guide.
Claim 6
Dependent Claim
51 words
The latch as described in claim 3 wherein the keeper assembly includes an adjustment wheel mounted therein and threaded around the opposite end of the pin, by rotating the adjustment wheel the pin and pin head are moved lengthwise along the pin axis and inwardly and outwardly from the keeper assembly.
Claim 7
Dependent Claim
49 words
The latch as described in claim 3 wherein the ends of the collet fingers have a portion thereof beveled for engaging the cam surface of the end plate when the collet and collet fingers are moved toward the end plate when the latch handle is in an opened position.
References Cited (Backward Citations)
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Cited
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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) | 1986-12-19 | 1987-06-20 | 1987-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-19 | 1991-06-20 | 1991-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-19 | 1995-06-20 | 1995-12-20 | $7700.00 | Window Closed / Lapsed |