Pressure relief valve
First Claim
Patent Images
1. A vehicle comprising at least one valve assembly, at least one rotatably mounted wheel including a tire supported thereon and having an inflatable volume normally containing an air pressure greater than a first predetermined amount and less than a greater second predetermined amount;
- the valve assembly including a valve housing affixed to the wheel and having a first port fluidly communicating with air pressure in the volume and having a vent port, a first valving means disposed in the housing and biased toward a closed position by a closing force of a spring means and toward an open position by an opening force of the air pressure at the first port;
the first valving means operative in the closed and open positions respectively to prevent and allow air flow from the first port to the vent port;
the improvement characterized by;
the air pressure opening force exceeding the spring means closing force in response to the air pressure at the first port being greater than the first predetermined amount; and
blocker means for preventing the opening of the first valving means in response to the air pressure at the first port being between the first and second predetermined amounts, the blocker means operative to prevent the opening of the first valving means in response to selective movement of an actuation means from a vent position to a nonvent position.
5 Assignments
0 Petitions
Accused Products
Abstract
A vehicle including a pressure relief valve mounted on a wheel is provided. The valve includes a spring biased vent valve mechanism therein and a blocker which is a actuable or manipulable to either a vent position or a nonvent position. When the blocker is in the vent position, the valve acts as a vent valve. When the blocker is in the nonvent position, the spring biased valve mechanism is prevented from opening.
-
Citations
11 Claims
-
1. A vehicle comprising at least one valve assembly, at least one rotatably mounted wheel including a tire supported thereon and having an inflatable volume normally containing an air pressure greater than a first predetermined amount and less than a greater second predetermined amount;
- the valve assembly including a valve housing affixed to the wheel and having a first port fluidly communicating with air pressure in the volume and having a vent port, a first valving means disposed in the housing and biased toward a closed position by a closing force of a spring means and toward an open position by an opening force of the air pressure at the first port;
the first valving means operative in the closed and open positions respectively to prevent and allow air flow from the first port to the vent port;
the improvement characterized by;the air pressure opening force exceeding the spring means closing force in response to the air pressure at the first port being greater than the first predetermined amount; and blocker means for preventing the opening of the first valving means in response to the air pressure at the first port being between the first and second predetermined amounts, the blocker means operative to prevent the opening of the first valving means in response to selective movement of an actuation means from a vent position to a nonvent position. - View Dependent Claims (2, 3, 4, 5)
- the valve assembly including a valve housing affixed to the wheel and having a first port fluidly communicating with air pressure in the volume and having a vent port, a first valving means disposed in the housing and biased toward a closed position by a closing force of a spring means and toward an open position by an opening force of the air pressure at the first port;
-
6. A valve assembly comprising a housing including a first port adapted to be connected with air pressure in a volume, a second port adapted to be connected with a source of pressurized air for increasing the air pressure in the volume, a vent port, and a first valving means disposed in the housing and biased toward a closed position by a closing force of spring means and toward an open position by an opening force of air pressure at the first port, the first valving means operative in the closed and open positions respectively to prevent and allow air flow from the first port to the vent port;
- characterized by;
a second valving means disposed in the housing and movable between open and closed positions respectively to allow and prevent air flow between the first and second ports independent of the air pressure amount at the first and second ports; blocker means operative in response to the second valving means open position to prevent movement of the first valving means to the open position thereof in response to the opening force of the air pressure exceeding the closing force of the spring means; and actuation means for selectively moving the second valving means between the open and closed positions thereof. - View Dependent Claims (7, 8, 9, 10, 11)
- characterized by;
Specification