Invention Grant
- Patent Title: Manhole frame with one or more handholds
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Application No.: US15813475Application Date: 2017-11-15
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Publication No.: US10030351B2Publication Date: 2018-07-24
- Inventor: Ronald Armstrong
- Applicant: Ronald Armstrong
- Agency: Oyen Wiggs Green & Mutala LLP
- Agent Bruce M. Green
- Main IPC: E02D29/12
- IPC: E02D29/12 ; E02D29/14

Abstract:
A design for manhole frames is provided which provide one or more handholds near the entrance to the manhole so that the ladder rungs can be made lower and the access space at the entrance to the manhole thereby increased. The handhold can be cast into the cover-supporting lip, a detachable vertical handle or can be a movable handle which is below the level of the manhole when not in use or extended above ground level when in use.
Public/Granted literature
- US20180073212A1 MANHOLE FRAME WITH ONE OR MORE HANDHOLDS Public/Granted day:2018-03-15
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