Vehicle seat and shock-absorbing material

Details Vehicle seat and shock-absorbing material Vehicle seat and shock-absorbing material

1997-04-16

1998-11-10

Cranmer, Laurie K.

Chairs and seats

Bottom or back

Contoured bottom

29745228, A47C 702

Patent

active

058333207

ABSTRACT:
A vehicle seat reduces the amount of vibrations from the vehicles engine or riding surface felt by the rider, without sacrificing the comfort and fitness of the seat. The seat desirably includes a shock-absorbing member layered with a urethane cushion member. The shock-absorbing material comprises a viscoelastic material using a super-soft urethane elastomer as a matrix resin with a low density filler of resinous microballoons. The percent weight ratio between the resinous microballoons and the resin matrix advantageously ranges from 1% to 5%. In order to provide adequate damping without presenting too hard of a feel, the viscoelastic material desirable has a normal storage modulus (E.sub.1) ranging between 0.0628 MPa and 0.234 MPa, and a normal loss modulus (E.sub.2) ranging between 0.0171 MPa and 0.131 MPa.

REFERENCES:
patent: 4108928 (1978-08-01), Swan, Jr.
patent: 4252910 (1981-02-01), Schaefer
patent: 4524529 (1985-06-01), Schaefer
patent: 4861804 (1989-08-01), Nakanishi
patent: 5189747 (1993-03-01), Mundt et al.
patent: 5272001 (1993-12-01), Weisman
patent: 5332760 (1994-07-01), Weisman
patent: 5418257 (1995-05-01), Weisman

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