US4768136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aircraft landing zone marker
Assignee: Individual
•
Filing: 1986-12-12
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Granted: 1988-08-30
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Expires: 2006-12-12
Abstract
Abstract A portable landing zone marker which includes a fixture for holding a chemiluminiscent element to provide an illuminated night landing zone for aircraft. The marker also includes a relatively heavy and dense base which enables the marker to resist relatively high winds.
Inventors
- 👤 William Tashjian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:46
CPC Classifications
F; F21; F21K; F21K99/00; B; B64; B64F; B64F1/00; B64F1/18; B64F1/20; F21K2/00; F21K2/06; F21S; F21S6/00; F21V; F21V21/00; F21V21/06; F21W; F21W2111/00; F21W2111/06; F21Y; F21Y2103/00
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
120 words
A landing zone marker for aircraft landings under law light conditions, said landing zone marker comprising: (a) a compact supporting base which has a top surface and a bottom surface for resting on a supporting surface of a landing zone, said base being sufficiently heavy and dense relative to the marker as a whole to resist natural wind and artificial wind which is created by landing aircraft for maintaining the landing zone marker in a set position in (or) the landing zone, (b) a holding fixture which is fixed to and extends upwardly from said top surface, said fixture having a socket, and (c) a lightstick having chemiluminescent properties and which is adapted to be removably inserted into said socket.
Claim 2
Dependent Claim
120 words
A landing zone marker for aircraft landings under law light conditions, said landing zone marker comprising: (a) a compact supporting base which has a top surface and a bottom surface for resting on a supporting surface of a landing zone, said base being sufficiently heavy and dense relative to the marker as a whole to resist natural wind and artificial wind which is created by landing aircraft for maintaining the landing zone marker in a set position in (or) the landing zone, (b) a holding fixture which is fixed to and extends upwardly from said top surface, said fixture having a socket, and (c) a lightstick having chemiluminescent properties and which is adapted to be removably inserted into said socket.
Claim 3
Dependent Claim
31 words
A landing zone marker as recited in claim 1, wherein said bottom surface is substantially flat and includes an attached magnet for affixing said landing zone marker to a ferrous surface.
Claim 4
Dependent Claim
17 words
A landing zone marker as recited in claim 1, wherein said base is made of ferrous metal.
Claim 5
Dependent Claim
16 words
A landing zone marker as recited in claim 1, wherein said base is made of lead.
Claim 6
Dependent Claim
17 words
A landing zone marker as recited in claim 1, wherein said base is made of copper alloy.
Claim 7
Dependent Claim
47 words
A landing zone marker as recited in claim 1, wherein said fixture comprises: (a) a vertical support arm extending upwardly from the top surface and having an upper end, and (b) a head portion mounted to the upper end of said support arm and containing said socket.
Claim 8
Dependent Claim
28 words
A landing zone marker as recited in claim 6, wherein said socket has a central longitudinal axis which is at an angle relative to said vertical support arm.
Claim 9
Dependent Claim
41 words
A landing zone marker as recited in claim 7, wherein said head portion includes an externally mounted thumbscrew, said thumbscrew having one end which projects into said socket, for engaging the portion of said lightstick which is inserted into said socket.
Claim 10
Dependent Claim
34 words
A landing zone marker as recited in claim 7, wherein said upper end includes a hinge joint for adjusting the degree of angulation of said mounted head portion relative to said vertical support arm.
Claim 11
Dependent Claim
25 words
A landing zone marker as recited in claim 9, wherein said hinge joint includes a thumbscrew to lock said head portion at a desired angle.
Claim 12
Dependent Claim
23 words
A landing zone marker as recited in claim 1, wherein said lightsticks are of the type which are sold under the tradename "CYALUME".
Claim 13
Dependent Claim
18 words
A landing zone marker as recited in claim 1, wherein said lightstick is frictionally held within said socket.
Claim 14
Dependent Claim
44 words
A landing zone marker as recited in claim 12, wherein said socket has internal threads which are relatively harder than the portion of said lightstick which is inserted into said socket, whereby said portion is self threaded when it is inserted into said socket.
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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) | 1991-08-30 | 1992-02-29 | 1992-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-30 | 1996-02-29 | 1996-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-30 | 2000-02-29 | 2000-08-30 | $7700.00 | Window Closed / Lapsed |