Patents by Inventor Anthony R. Centa

Anthony R. Centa has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5100257
    Abstract: An access cover for a manhole of the kind in which the removable cover member fits within an outer surrounding frame (2), the cover being in the form of an inner frame (5) containing an appropriate filling material (11), such as concrete. The appearance of the upper edges of the inner and outer frames is enhanced by providing the upper edges with decorative strips (12) which are positively fixed to the upper edges of the frame members (2, 6) by a tongue and groove joint (21, 22). Preferably, the groove (21) is formed with at least one splayed-out wall (20) which, after assembly, is pressed into longitudinal engagement with a corresponding wall of the tongue (22). An insulating layer (23) can be provided to prevent any chemical reaction between the frames and strips when they are of dissimilar metals.
    Type: Grant
    Filed: August 23, 1990
    Date of Patent: March 31, 1992
    Inventor: Anthony R. Centa