Cryogenic insulation strength and bond tester

Details Cryogenic insulation strength and bond tester Cryogenic insulation strength and bond tester

1983-11-03

1985-10-22

Myracle, Jerry W.

Measuring and testing

Specimen stress or strain, or testing by stress or strain...

By loading of specimen

73150A, G01N 308

Patent

active

045480834

ABSTRACT:
A method and apparatus for testing the tensile strength and bonding strength of sprayed-on foam insulation (12) attached to metal cryogenic fuel tanks (14). A circular cutter is used to cut the insulation (12) down to the surface of the metal tank to form plugs of the insulation (12) for testing "in situ" on the tank (14). The apparatus comprises an electro-mechanical pulling device (32) powered by a belt battery pack (34). The pulling device (32) comprises a motor (60) driving a mechanical pulling structure comprising a horizontal shaft (64) connected to two bell cranks (68) which are connected to a central member (74). When the lower end of member (74) is attached to fitting (20), which in turn is bonded to plug (10) (see FIG. 2), a pulling force is exerted on plug (10) sufficient to rupture it. The force necessary to rupture the plug (10) or pull it loose is displayed as a digital read-out (51) on screen (50).

REFERENCES:
patent: 3464261 (1969-09-01), Helms
patent: 3821892 (1974-07-01), Saberg

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