Air suspension device for vehicle seat
First Claim
1. An air suspension device for a vehicle seat, in which said seat includes a seat cushion, comprising:
- an upper frame on which said seat cushion is mounted;
a lower frame fixed on a floor of said vehicle;
an X-shaped link provided between said upper and lower frames, said X-shaped being expandable and contractible vertically;
an air spring interposed between said upper and lower frames;
an air supply source adapted to supply a compressed air into said air spring;
a control valve disposed between said air spring and air supply source, said control valve being adapted to control supply and exhaust of said compressed air into and from said air spring;
a manual control valve disposed between said air supply source and said control valve;
a check valve disposed between said manual control valve and air spring in a parallel relation with said control valve, said check valve being adapted to permit flow of said compressed air in a sole direction from said air spring towards said manual control valve.
1 Assignment
0 Petitions
Accused Products
Abstract
An air suspension device for a vehicle seat which is capable of automatic adjustment of the height of the seat at a given neutral position. In the device, an air spring is adjusted in flow of air thereinto or therefrom via a directional control valve which is actuated responsive to the vertical movements of link members, so as to adjust the height of the seat. A play is provided in the interlocking relation between the control valve and link members to avoid unnecessary actuation of the valve. Further, a manual control valve is disposed between an air source and the air spring, with a check or shuttle valve provided therein, thereby forming a direct air exhaust circuit, whereby operating the manual valve effects a rapid exhaust of air from the air spring, not via the directional control valve.
63 Citations
9 Claims
-
1. An air suspension device for a vehicle seat, in which said seat includes a seat cushion, comprising:
-
an upper frame on which said seat cushion is mounted; a lower frame fixed on a floor of said vehicle; an X-shaped link provided between said upper and lower frames, said X-shaped being expandable and contractible vertically; an air spring interposed between said upper and lower frames; an air supply source adapted to supply a compressed air into said air spring; a control valve disposed between said air spring and air supply source, said control valve being adapted to control supply and exhaust of said compressed air into and from said air spring; a manual control valve disposed between said air supply source and said control valve; a check valve disposed between said manual control valve and air spring in a parallel relation with said control valve, said check valve being adapted to permit flow of said compressed air in a sole direction from said air spring towards said manual control valve. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
Specification