Patent ID: 11892050
Assignee: PROSPIRA CORPORATION
Field: Mechanical elements (Mechanical engineering)
Classification: CPC B  F | IPC B  F

Claim 0:
1. An anti-vibration device comprising:
an outer cylinder;
a shaft member that is provided in the outer cylinder; and
an elastic member that elastically integrates the outer cylinder and the shaft member,
wherein the shaft member has an inner cylinder and four stopper portions that protrude from a circumferential surface of the inner cylinder toward an outer side in a radial direction and that are mutually provided at intervals in a circumferential direction,
wherein the elastic member elastically integrates the outer cylinder and the shaft member at a position between stopper portions that are adjacent to each other in the circumferential direction,
wherein two stopper portions of the four stopper portions protrude in a vertical direction corresponding to a vibration direction of an object and remaining two stopper portions of the four stopper portions protrude in a front and back direction, and
wherein, on a tip end of each of the remaining two stopper portions extending in the front and back direction, a widened part that protrudes downward is formed and a widened part that protrudes upward is not formed.