Knock-out pressure test cap with breakaway nipple plug

Details Knock-out pressure test cap with breakaway nipple plug Knock-out pressure test cap with breakaway nipple plug

2006-05-02

2011-11-15

Larkin, Daniel S (Department: 2856)

Measuring and testing

With fluid pressure

Clamp, plug, or sealing feature

C073S049500, C073S049100, C138S090000

Reissue Patent

active

RE042909

ABSTRACT:
A pressure test cap includes a mounting collar with an outer rib to limit depth of insertion of the cap into a pipe. A closure disc which seals the mounting collar is connected to the collar through an inner rim by a weakened ring. An outer rim section registers with the inner rim so that impacts to the outer rim are transferred to the weakened ring to separate the disc from the collar. The closure disc includes a centrally positioned nipple for connection of a conduit of a pressurized test fluid source. The nipple is closed by a break-away nipple plug. The nipple plug has a centrally located indentation for piercing to bleed trapped air from the system and resealing by a screw.

REFERENCES:
patent: 986905 (1911-03-01), Carlson
patent: 4678097 (1987-07-01), Crute
patent: 4763510 (1988-08-01), Palmer
patent: 4768560 (1988-09-01), Logsdon
patent: 4813569 (1989-03-01), Ruiz
patent: 4860796 (1989-08-01), Hagin
patent: 4899903 (1990-02-01), Miyasaka et al.
patent: 5377361 (1995-01-01), Piskula
patent: 5507501 (1996-04-01), Palmer
patent: 6116286 (2000-09-01), Hooper et al.
patent: 6170529 (2001-01-01), Howe
2001 Sales Catalog of Sioux Chief Manufacturing Company, Inc., specifically p. 155 showing the T.K.O. Knockout Closet.

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