Patent ID: 11933320
Assignee: HAIER US APPLIANCE SOLUTIONS, INC.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  A | IPC A  F

Claim 18:
19. A dishwashing appliance defining a vertical direction, the dishwashing appliance comprising:
a tub that defines a wash chamber for receipt of articles for washing;
a sump positioned at a bottom portion of the tub along the vertical direction;
a fluid pump defining a center of gravity and mutually perpendicular X-, Y-, and Z axes, wherein the Y-axis is a vertical axis extending along the vertical direction from the center of gravity, the fluid pump comprising:
a pump housing,
a motor mounted to the pump housing, and
a displacement body mechanically coupled to the motor to rotate about a rotation axis; and

a vibration damper attached to the pump housing to absorb vibrations thereon, the vibration damper comprising
a first spring beam extending longitudinally along a longitudinal direction between a fixed end proximal to the pump housing and a free end distal to the pump housing, the free end of the first spring beam being offset from the center of gravity at a first radial side disposed on a first side of the center of gravity relative to the Y-axis,
a first damper mass disposed on the free end of the first spring beam at the first radial side,
a second spring beam extending longitudinally along the longitudinal direction between a fixed end proximal to the pump housing and a free end distal to the pump housing, the free end of the second spring beam being offset from the center of gravity at a second radial side, and
a second damper mass disposed on the free end of the second spring beam at the second radial side disposed on a second side of the center of gravity relative to the Y-axis, and
a mounting bracket joining the first spring beam and the second spring beam, the mounting bracket defining a plurality of discrete attachment points attached to the pump housing, the discrete attachment points each comprising one or more mechanical fasteners, at least one attachment point of the plurality of discrete attachment points being aligned with and above the center of gravity along the Y-axis, a separate attachment point of the plurality of discrete attachment points being horizontally offset from the center of gravity and lower than the at least one attachment point such that the separate attachment point is discontinuous from the at least one attachment point,
wherein the first spring beam and the first damper mass are symmetrically tuned with the second spring beam and the second damper mass at opposite horizontal sides of the center of gravity to have equivalent natural frequencies or vibrational modes to cancel or counteract displacement at a pair of the first spring beam and the first mass damper with displacement at a pair of the second spring beam and the second mass damper, the opposite horizontal sides being opposite sides relative to the Y-axis, and
wherein the longitudinal direction is perpendicular relative to the rotation axis and non-parallel to the Y-axis.