Debris cap

Details Debris cap Debris cap

1989-04-10

1990-05-01

Marcus, Stephen

Receptacles

Closures

Having means for securing or retaining closure in its closed...

220238, 220318, 138 89, B65D 4528

Patent

active

049211234

ABSTRACT:
A debris cap is provided for closing the end of an access pipe for an underground water shut-off valve. A hollow member with a closed end and a cylindrical outer surface has a plurality of resilient pads spaced around its periphery. At least one of the pads is carried on the outer end of a slide which is moveable radially of the hollow member by a rotatable cam carried at the closed end of the member. Rotation of the cam by a handle moves the slide and the pad carried thereon outwardly to cause the pads to grip the inner surface of the access pipe to hold the cap in place. The angle of advance on the cam is slight so that external force applied to the slide does not rotate the cam. The cap is also adapted to carry a locating coil.

REFERENCES:
patent: 1045287 (1912-11-01), Henderson
patent: 3543801 (1970-12-01), Thayer et al.
patent: 3820682 (1974-06-01), Darella
patent: 4027701 (1977-06-01), Duckworth, Jr.
patent: 4384656 (1983-05-01), McQuiston et al.
patent: 4387740 (1983-06-01), Vanzant
patent: 4693278 (1987-09-01), Wilson et al.

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