Tamper-evident cap for securing refrigerant service ports

Details Tamper-evident cap for securing refrigerant service ports Tamper-evident cap for securing refrigerant service ports

1992-07-20

1993-09-07

Schwadron, Martin P.

Fluid handling

With lock or seal

Common lock and valve actuator

292307R, 285 80, F16K 3500

Patent

active

052419827

ABSTRACT:
A tamper-evident cap structure cooperates with a one-way, anti-disconnect strap so that the cap can be screwed onto or secured to the service port of an air-conditioning system, and the anti-disconnect strap can be then looped around both the cap and the refrigerant flow pipe supporting the service port. The anti-disconnect strap can form a permanent part of the cap, or it can be removably secured to the cap; in either case unauthorized entry is indicated by the need to break or sever the strap. Also provided with the anti-disconnect strap is an identity tag upon which the identity of the service organization and date of service can be recorded when a new cap-and-strap assembly is used.

REFERENCES:
patent: 1022045 (1912-04-01), Phelps
patent: 1526301 (1925-02-01), Stevens
patent: 1896706 (1933-02-01), Grimes
patent: 2299183 (1942-10-01), Shanor
patent: 2599472 (1952-06-01), Miller
patent: 3588963 (1971-06-01), Moberg
patent: 4307903 (1981-12-01), Wallace
patent: 4318495 (1982-03-01), Wood
patent: 4586570 (1986-05-01), Swift
patent: 4651901 (1987-03-01), Ozdemir
patent: 4817450 (1989-04-01), Jachim

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