This paper is based on John A. Macken´s proposal [1], that the universe is only spacetime. In the context of Quantum Mechanics, Macken defines the spacetime dipole wave (DW) model, where spacetime can be seen as a sea of energetic waves, traveling at light speed.From this model, the DW pressure (~ 10113 J/m3) is analyzed in the context of the kinetic gas theory and so DW pressure is used to define a fundamental particle, named by the author as a Ulianov Hole (uhole).Auhole can be related to an elastic tube connecting two regions of space (or time), generating variations inDW pressure. Two kinds of uholes are presented in this paper: the spatial uhole (uhole-S) that has a property related to mass; and the time uhole (uhole-T) that has a property related to electric charge.This paper presents a basic analysis of the uholes-S model, that can explain themass generation mechanism of elemental particles, without using the Higgs field model.The uhole-S has two ends, one related with matter and the other with antimatter. And so, a mass particle is formed when one uhole-S is stretched enough toavoid an annihilation process. The uhole-S model also relates mass particles to the behavior of micro black holesthat reduce the DW pressure. This model also explains mass attractionforce (gravitational mass) and the resistance of mass movement in space (inertial mass), enabling the deduction of some of Newton’s Laws.