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US4081177A Expired / Lapsed US ⏱️ 0.0 years remaining

Break-away outrigger

Assignee: United States Department of the Air Force
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Filing: 1977-03-10
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Granted: 1978-03-28
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Expires: 1997-03-10
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Abstract

Abstract An outrigger arm assembly to prevent a would-be intruder from successfully climbing over a fence. The outrigger arm assembly is mounted on top of the fence. Each hollow fence post is interconnected to a hollow outrigger arm by a replaceable collar which breaks when a load in the range of 20 to 30 pounds is applied to the outrigger arm, resulting in the downward movement of the outrigger arm, and the fall of the climber. The assembly also includes a movement sensor, within the hollow arm, which is activated and provides an alarm signal, when the outrigger arm is moved more than a predetermined number of degrees, such as the downward movement of the outrigger arm. The assembly further includes a coiled spring, positioned within the hollow fence post and extending into the hollow outrigger arm, by which the arm is automatically returned to its original defensive position, after the load is removed.

Inventors

  • 👤 Albert J. Graff

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-04 19:42
CPC Classifications
G; G08; G08B; G08B13/00; G08B13/02; G08B13/12; G08B13/122; E; E04; E04H; E04H17/00; E04H17/14; E04H17/24; F; F16; F16B; F16B2200/00; F16B2200/63; Y; Y10; Y10T; Y10T403/00; Y10T403/45; Y10T403/459

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 260 words
An outrigger arm assembly adapted for use with a hollow upright fence post having a top end portion with a top end, comprising: a. hollow outrigger arm configurated in the form of an upright portion and an inclined portion, wherein said upright portion has a top end and a bottom end and said inclined portion has a first end, a second end, an upper external surface and a lower external surface; b. means, connected to said lower external surface of said inclined portion of said hollow outrigger arm, for holding and supporting a plurality of wires transverse to said inclined portion wherein said means includes a plurality of hooks connected, in spaced-apart relationship, to said lower external surface of said inclined portion of said hollow outrigger arm; c. means, in abutting contact with said inclined portion of said hollow outrigger arm, for sensing movement of said inclined portion, wherein said means for sensing movement of said inclined portion comprises a sensor positioned within said inclined portion, with said sensor so disposed that it is activated when said inclined portion is moved a predetermined number of degrees from the normal inclination of said inclined portion; d. means, disposed internal of said hollow upright fence post and said hollow outrigger arm, for maintaining said hollow outrigger arm in a preselected positional relationship with and to said hollow upright fence post; e. and, means for releasably holding together and supporting said top end portion of said hollow upright fence post and said bottom end of said upright portion of said hollow outrigger arm.
Claim 2
Dependent Claim 260 words
An outrigger arm assembly adapted for use with a hollow upright fence post having a top end portion with a top end, comprising: a. hollow outrigger arm configurated in the form of an upright portion and an inclined portion, wherein said upright portion has a top end and a bottom end and said inclined portion has a first end, a second end, an upper external surface and a lower external surface; b. means, connected to said lower external surface of said inclined portion of said hollow outrigger arm, for holding and supporting a plurality of wires transverse to said inclined portion wherein said means includes a plurality of hooks connected, in spaced-apart relationship, to said lower external surface of said inclined portion of said hollow outrigger arm; c. means, in abutting contact with said inclined portion of said hollow outrigger arm, for sensing movement of said inclined portion, wherein said means for sensing movement of said inclined portion comprises a sensor positioned within said inclined portion, with said sensor so disposed that it is activated when said inclined portion is moved a predetermined number of degrees from the normal inclination of said inclined portion; d. means, disposed internal of said hollow upright fence post and said hollow outrigger arm, for maintaining said hollow outrigger arm in a preselected positional relationship with and to said hollow upright fence post; e. and, means for releasably holding together and supporting said top end portion of said hollow upright fence post and said bottom end of said upright portion of said hollow outrigger arm.
Claim 3
Dependent Claim 52 words
An outrigger arm assembly, as set forth in claim 1, wherein said means for maintaining said hollow outrigger arm in a preselected positional relationship with and to said hollow upright fence post is a coiled spring disposed within said hollow outriggerarm and said top end portion of said hollow upright fence post.
Claim 4
Dependent Claim 93 words
An outrigger arm assembly, as set forth in claim 1, wherein said means for releasably holding together and supporting said top end portion of said hollow upright fence post and said upright portion of said hollow outrigger arm is a collar that is fitted over and holds together said top end portion of said hollow upright fence post and said upright portion of said hollow outrigger arm, wherein said collar is made of material that breaks when a load of preselected quantity is applied to said inclined portion of said hollow outrigger arm.
Claim 5
Dependent Claim 25 words
An outrigger arm assembly, as set forth in claim 3, wherein the load of preselected quantity is in the range of twenty to thirty pounds.

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) 1981-03-27 1981-09-26 1982-03-28 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1985-03-27 1985-09-26 1986-03-28 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1989-03-27 1989-09-26 1990-03-28 $7700.00 Window Closed / Lapsed

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