Chairs and seats – Back movement resiliently opposed in operating position – Back and bottom adjust in a fixed relationship
Patent
1994-04-13
1996-04-09
Brown, Peter R.
Chairs and seats
Back movement resiliently opposed in operating position
Back and bottom adjust in a fixed relationship
2483721, 267160, 2973031, 297311, 297325, A47C 102, B60N 202
Patent
active
055055214
ABSTRACT:
A sprung seat frame comprises a base element, a top element and a spring arrangement between the base and top elements. The spring arrangement has at least two leaf springs which are arranged one above the other at a spacing from each other and at least approximately parallel to each other. One end portion of each leaf spring is connected to the base element and the second end portion of each leaf spring is connected to the top element. The leaf springs are disposed obliquely inclinedly between the base and top elements. At least one corrector leaf spring which is oriented at least approximately parallel to the leaf springs and which is shorter than same is additionally operatively disposed between the base and top elements for optimizing the springing characteristic of the seat frame.
REFERENCES:
patent: 1962464 (1934-06-01), Richsteig
patent: 2101422 (1937-12-01), Assalit
patent: 2313559 (1943-03-01), Larsen et al.
patent: 2586951 (1952-02-01), Johnson
patent: 2641307 (1953-06-01), McKinney et al.
patent: 4889385 (1989-12-01), Chadwick et al.
Hoerner Josef
Meiller Hermann
Brown Peter R.
Grammer AG
Lillie Raymond J.
Olstein Elliot M.
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