Releasable fastener system

Releasable fastener system

A releasable fastener system (10) comprises a loop portion (12) and a hook portion (14). The loop portion (12) includes a support (16) and a loop material (18) disposed on one side thereof. The hook portion (14) generally includes a support (20) and a plurality of closely spaced upstanding hook elem...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: STANFORD, THOMAS B., JR, MOMODA, LESLIE A, POWELL, BOB R., JR, BARVOSA-CARTER, WILLIAM, JOHNSON, NANCY L, BROWNE, ALAN L
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
AEROPLANES
AIRCRAFT
AVIATION
BLASTING
BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
COSMONAUTICS
DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS ORMACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS,CLIPS, WEDGES, JOINTS OR JOINTING
ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
ENGINEERING ELEMENTS AND UNITS
GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS
GENERATION
HABERDASHERY
HEATING
HELICOPTERS
HUMAN NECESSITIES
JEWELLERY
LIGHTING
MECHANICAL ENGINEERING
PERFORMING OPERATIONS
THERMAL INSULATION IN GENERAL
TRANSPORTING
WEAPONS
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Beschreibung
Zusammenfassung:A releasable fastener system (10) comprises a loop portion (12) and a hook portion (14). The loop portion (12) includes a support (16) and a loop material (18) disposed on one side thereof. The hook portion (14) generally includes a support (20) and a plurality of closely spaced upstanding hook elements (22) extending from one side thereof, wherein the plurality of hook elements (22) comprises or incorporates a shape memory alloy fiber. When the hook portion (14) and loop portion (12) are pressed together they interlock to form a releasable engagement. The resulting joint created by the engagement is relatively resistant to shear and pull forces and weak in peel strength forces. Introducing a thermal activation signal (24) to the plurality of hook elements (22) causes a change in shape orientation, flexural modulus property, or a combination thereof that effectively reduces the shear and/or pull off forces in the releasable engagement. In this manner, disengagement of the releasable fastener system provides separation of the hook portion from the loop portion under controlled conditions. Also disclosed herein are processes for operating the releasable fastener system.