In a general aspect, a pressure regulating device helps achieve a correct inflation pressure of an inflatable object. In some aspects, an inflation device includes an inlet, and outlet, and a vent port. The inflation device also includes one or more interior surfaces that define a gas-delivery pathway fluidly-coupling the inlet and the outlet. A flow restriction is disposed along the gas-delivery pathway between the inlet and the outlet. Moreover, an opening is disposed along the gas-delivery pathway adjacent the flow restriction and downstream thereof. The inflation device also includes a gas-exhaust pathway fluidly-coupling the opening and the vent port. A first chamber of the gas-exhaust pathway is in fluid communication with the opening, and a second chamber of the gas-exhaust pathway is in fluid communication with the vent port. A pressure-relief valve is configured to control gas flow between the first chamber and the second chamber.

In a general aspect, a pressure regulating device helps achieve a correct inflation pressure of an inflatable object. In some aspects, an inflation device includes an inlet, and outlet, and a vent port. The inflation device also includes one or more interior surfaces that define a gas-delivery pathway fluidly-coupling the inlet and the outlet. A flow restriction is disposed along the gas-delivery pathway between the inlet and the outlet. Moreover, an opening is disposed along the gas-delivery pathway adjacent the flow restriction and downstream thereof. The inflation device also includes a gas-exhaust pathway fluidly-coupling the opening and the vent port. A first chamber of the gas-exhaust pathway is in fluid communication with the opening, and a second chamber of the gas-exhaust pathway is in fluid communication with the vent port. A pressure-relief valve is configured to control gas flow between the first chamber and the second chamber.