Wiper motor mounting grommet

Claim 1

The combination of a one-piece integral resilient grommet of elastomeric material and a non-deformable spool for mounting a fractional horsepower motor or the like on a support surface in a spaced apart relation and to reduce the vibration and associated noise propagation to a negligible amount, said grommet comprising a center sleeve portion of resilient deformable material having a cylindrical center opening, a pair of spaced apart vibration dampening members integrally formed of resilient deformable material around said sleeve portion, each of said vibration dampening members having a circular end wall extending radially from said sleeve portion and an outer annular wall extending coaxially of said cylindrical center opening, a first set of radially extending ribs of resilient deformable material extending axially from one of said circular end walls between its sleeve portion and its outer annular wall, and a second set of radially extending ribs of resilient deformable material extending axially from the other of said circular end walls between its sleeve portion and its outer annular wall, where said first and second set of radially extending ribs are angularly offset in an axial direction from each other, and said non-deformable spool includes a hollow shank portion with an outer diameter slightly smaller than said cylindrical center opening and a head portion having a central aperture the size of said outer diameter for said hollow shank portion, and the other end face of said resilient grommet being shaped to conform to the underside of said head portion of said spool such that said head portion engages substantially the entire surface area of said other end face and where said circular end wall of said pair of spaced apart vibration dampening members are separated by a selected distance to define an annular recess for mounting said motor or like component to be vibrationally isolated.