Processes are introduced that suffuse the Universe with gravitons that do not originate from any gravitational body. These processes maintain a constant flux of gravitons even as the Universe expands. The gravitons created in these processes move in all directions at the speed of light and add to the flux of gravitons emanating from the active gravitational masses of atoms, stars and galaxies that permeate the Universe. The Temporal Inertial (TI) field model is a conjecture of this author. In this hypothetical model the TI field mediates the force of gravity. Particles of the TI field (TIPs) are subject to gravity, baryonic matter is not. The TI field permeates all of space from the space within atoms to the expanse of the Universe. Particles of the TI field are continuously jostled about by the turmoil of vacuum fluctuations. As these TIPs move through space they encounter an increase in the flux of gravitons in their direction of motion and a decrease in the flux of gravitons opposite their direction of motion. Accordingly, TIPs are accelerated in the direction of their motion through space. The increase in kinetic energy of the TIPs increases the pressure they exert on their surround and the volume of a given aggregate of TIPs increases. This local expansion is replicated throughout space and extrapolates to an expansion of the entire Universe.