Hydraulically damped elastic motor mount having an improved grid and partition arrangement

Claim 1

In a hydraulically damped elastic mount for vibrating equipment comprising: a bearing core, an annular elastic member and a bottom plate enclosing a working spaced for receiving a hydraulic liquid; means for providing a variable volume equalization space in association with said working space with said working space and said equalization space forming an enclosed receptacle for retaining received hydraulic liquid; two grid plates having grid bars disposed between said working space and said equalization space; a thin partition fabricated from a soft elastic material disposed between said two grid plates having partial regions associated with grid openings; means for providing a permanently open choke opening fluid passage between said working space and said equalization space; the improvement comprising: said grid bars of both grids continuously abut against said partition clamping said partition therebetween; the smallest width of said grid openings of each grid is about 1.5 to 25 times the thickness of said partition; and a plurality of said partial regions of said partition associated with a plurality of said grid openings each has at least one separation comprising a cut having a maximum width of 0.2 times the thickness of said partition whereby said separations permit liquid flow in a first direction from said working space to said equalization space and in a second direction from said equalization space to said working space responsive to the pressurization of said received hydraulic liquid.