Patent ID: 8851791

Claim:
A manhole cover venting and precipitation guarding device for a manhole cover having an exterior manhole cover surface and an interior manhole cover surface, the manhole cover venting and precipitation guarding device comprising: a device housing adapted for attachment to the manhole cover, the device housing including: a head portion having a head portion surface adapted to protrude beyond an entire plane of the exterior manhole cover surface; a device bore extending through the head portion and adapted to communicate with the interior manhole cover surface of the manhole cover; a device valve disposed in fluid communication with the device bore of the head portion, the device valve adapted for opening to the interior manhole cover surface and adapted to seal the exterior manhole cover surface from the interior manhole cover surface in a sealing position and establish fluid communication between the exterior manhole cover surface and the interior manhole cover surface in an unsealing position; and the device valve including a valve interior communicating with the device bore of the device housing, a valve seat between the valve interior and the device bore and a valve ball in the valve interior, the valve ball positional between engaging the valve seat in the sealing position and disengaging the valve seat in the unsealing position.