Invention Grant
- Patent Title: Manhole frame with one or more handholds
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Application No.: US14899482Application Date: 2014-07-08
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Publication No.: US09845586B2Publication Date: 2017-12-19
- Inventor: Ronald Armstrong
- Applicant: Ronald Armstrong
- Agency: Oyen Wiggs Green & Mutala, LLP
- Agent Bruce M. Green
- International Application: PCT/CA2014/050649 WO 20140708
- International Announcement: WO2015/010196 WO 20150129
- Main IPC: E02D29/14
- IPC: E02D29/14 ; E02D29/12

Abstract:
A manhole frame includes 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, 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
- US20160145826A1 MANHOLE FRAME WITH ONE OR MORE HANDHOLDS Public/Granted day:2016-05-26
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