Mechanical snubber

Details Mechanical snubber Mechanical snubber

E - Fixed Constructions

04

B

267/55

E04B 1/98 (2006.01) F16F 7/10 (2006.01) F16L 3/202 (2006.01)

Patent

CA 1120504

-29- Abstract A mechanical, seismic-shock-absorbing snubber adapted to accept extremely high impact loads that may be imposed upon it by reason of its interposition between heavy, relatively moveable structures. While permitting essentially unrestricted, slow, relative motion between the structures, such as may be caused by thermal effects (e.g., the expansion or contraction of a high pressure steam pipe yieldably attached by way of hangers or supports to a building structure as in a nuclear power plant), the snubber limits both the velocity and acceleration of relative motion between the structures such as might result from violent seismic shock or vibration. The snubber employs, as its damping mechanism, escapement means, preferably in the form of an escapement wheel, which rotates in response to relative movement of the structures between which the snubber is interposed and employs a cooperating, pivoted, engagement means, preferably in the form of a pallet member of predetermined effective mass driven by the escapement wheel into oscillation. It is the oscillation of the pallet member, the rate of which is limited by the pallet member's mass and natural period of oscillation, that restricts or damps the velocity and acceleration of relative motion between the structures with which the snubber is associated. Alternatively, instead of employing an escapement wheel, a rack may be employed, with the teeth of the rack engaging hooks or pallets on the pallet member to drive the latter into oscillation as the rack is moved relative to the pallet member.

338822

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