Fluid damped bushing with encapsulated window metal

Details Fluid damped bushing with encapsulated window metal Fluid damped bushing with encapsulated window metal

1996-02-05

1997-12-30

Poon, Peter M.

Spring devices

Resilient shock or vibration absorber

Including energy absorbing means or feature

2671414, F16F 500

Patent

active

057020949

ABSTRACT:
A fluid damped bushing (10, 100) comprising a metallic sleeve (12, 112) and an annular elastomeric body (14, 114) mold bonded to the exterior of the metallic sleeve. The elastomeric body has a spaced apart pair of fluid containing recesses (18, 118 and 20, 120) in its exterior surface with a serpentine shaped inertia track (26, 126) in the outermost surface of the elastomeric body to provide communication between the recesses. A window metal sleeve (16, 116) is encapsulated within the elastomeric body by mold bonding, and the window metal sleeve has a longitudinally spaced apart pair of rings (30, 130 and 32, 132) above and below the level of the recesses, respectively, and a diametrically opposed pair of webs (38, 138 and 40, 140) extending between the rings. In a first embodiment, a plurality of outwardly projecting pads (28) is located in one of the webs in the region of the inertia track to prevent deformation of the inertia track under lead. The annular elastomeric body inserted into an outer metallic sleeve (36, 136), while the sleeve and the elastomeric body are immersed in a damping fluid, and the diameter of the outer sleeve is then reduced by a swaging process to tightly seal the sleeve against the annular elastomeric body and to seal the damping fluid in the recesses and the inertia track. In another embodiment of the invention the metallic sleeve (112) has a generally elliptical, axially short rigid polymeric collar (140) affixed to the central portion thereof. The radially longer lobes (140a) of the collar are aligned with the recesses (118, 120) and serve to limit the amount of radial deflection of the bushing (100).

REFERENCES:
patent: 4953833 (1990-09-01), Schmidt et al.
patent: 5496018 (1996-03-01), McLelland et al.

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