Manhole riser extension assembly
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Sep 1, 2015
Grant Date -
Nov 6, 2014
app pub date -
May 5, 2014
filing date -
May 3, 2013
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A manhole riser extension assembly including separate upper and lower spacer rings which are assembled utilizing tabs that extend downwardly from the upper spacer ring about the lower spacer ring, and locking elements in association with the lower ring that cooperatively engage and bear radially outwardly against the tabs, respectively, to urge and/or lock the tabs against an inner surface of the manhole frame bounding the manhole cover seat, or to penetrate the tabs and bear against the inner surface, to hold the assembly together and in place in the manhole frame, and such that a manhole cover is positionable in sitting relation on the lower spacer ring, bounded by the upper spacer ring for covering the manhole. Optional lift protections tabs can be provided at locations about the upper spacer ring, in position to be covered by paving material to supplement the holding of the assembly in place.
First Claim
Other Claims data not available
Family
International Classification(s)
- 2014 Application Filing Year
- E02D Class
- 350 Applications Filed
- 306 Patents Issued To-Date
- 87.43 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 2 Citation Count
- E02D Class
- 14.45 % this patent is cited more than
- 10 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Mar 1, 2027 |
