Construction castings with ball and socket connectors

Details Construction castings with ball and socket connectors Construction castings with ball and socket connectors

2006-09-19

2006-09-19

Hartmann, Gary S. (Department: 3671)

Road structure, process, or apparatus

Pavement

Vault cover-closure

C220S810000, C220S831000, C016S224000, C403S122000

Reexamination Certificate

active

07108447

ABSTRACT:
A joint suitable for construction castings having a frame and a lid or cover, such as manholes, grates, trench drains, hatches and the like, and construction castings incorporating the same. No tools are necessary to separate the joint. A ball head located on a lid fits into a socket located on a frame or adjacent lid. To separate the ball head from the socket, the lid is lifted to a substantially vertical position and turned about ninety degrees. The lid can then be lifted away from the socket. When the joint is used in manhole or hatch assemblies, a latch may be used to hold the cover open and the cover may be opened and closed with a lever.

REFERENCES:
patent: 401560 (1889-04-01), Hotchkiss
patent: 782327 (1905-02-01), Diehl
patent: 797185 (1905-08-01), Diehl
patent: 1225679 (1917-05-01), Ransehousen
patent: 4109821 (1978-08-01), Lutz
patent: 4840514 (1989-06-01), Defrance et al.
patent: 5531541 (1996-07-01), Clover et al.
patent: 5745953 (1998-05-01), Golden
patent: 6113301 (2000-09-01), Burton
patent: 6302612 (2001-10-01), Fowler et al.
patent: 0420777 (1993-07-01), None
patent: 1160382 (2001-05-01), None
patent: 0796949 (2001-06-01), None
patent: 0856611 (2001-09-01), None
patent: 7018691 (1995-01-01), None
patent: 11131515 (1999-05-01), None
patent: 11323985 (1999-11-01), None
Saint-Gobain, Pamrex Manhole Covers (Brochure).

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