Accession Number:

ADD019004

Title:

Shape Memory Alloy Activated Retractable Elastomeric Sealing Device

Descriptive Note:

Patent Application, Filed on 7 Apr 98

Corporate Author:

DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s):

Report Date:

1998-04-07

Pagination or Media Count:

20.0

Abstract:

A retractable seal replaces the existing o-ring seals on the Tomahawk Capsule Launching System CLS. An elastomeric member is shaped to fit within the existing o-ring slot on the CLS and a cylindrical ring member of shape memory alloy circumscribes the elastomeric member. Under normal operating temperatures, the shape memory alloy member has a diameter large enough to allow the elastomeric member to extend beyond the diameter of the CLS so as to form a seal against the missile tube, yet small enough to not interfere with the seal. When the shape memory alloy member is heated, it contracts to a smaller predetermined diameter, compressing the elastomeric member within the o-ring slot so as to allow the movement of the CLS into or out of the missile tube without abrading the elastomeric member.

Subject Categories:

  • Adhesives, Seals and Binders
  • Guided Missile Launching and Basing Support

Distribution Statement:

APPROVED FOR PUBLIC RELEASE