Vehicle seat support

Claim 2

A vehicle seat support which includes a seat pan assembly intended to support a vehicle seat, a rigidly connected base plate assembly intended to be mounted on the floor of a vehicle, parallel links mechanism connecting the seat pan assembly and the base plate assembly to one another, a first spring abutment on the base plate assembly and a second spring abutment on one of the links of said parallel link mechanism, a compression spring acting between said abutments, and a rotatable adjusting means operable to effect the adjustment of the distance between the first and the second spring abutments, the axis of rotation of said adjusting means being fixed in relation to said base plate assembly and said adjusting means acting between said base plate assembly and said one of said links.

Claim 3

A vehicle seat support as claimed in claim 1, which further includes a projection on one of said links and wherein said adjusting means is a polygonal prism having a number of substantially parallelogram-shaped faces and which is mounted on said base plate assembly for angular movements about said axis of rotation, said axis of rotation extending eccentrically through the prism parallel to each of said faces, whereby angular movement of said prism about said axis of rotation positions one of said faces thereof to serve as a stop surface which is fixed in relation to said base plate assembly.

Claim 4

A vehicle seat support as claimed in claim 2, wherein said projection and said prism are located at substantially the middle of the width dimension of the seat support, an adjustment lever being connected to said prism to facilitate said angular movement thereof.

Claim 5

A vehicle seat support as claimed in claim 2, which further includes means operable to override the compression spring to convert the suspended vehicle seat support into a fixed vehicle seat support.

Claim 6

A vehicle seat support as claimed in claim 4, wherein said overriding means comprise a rod mounted on said seat pan assembly for angular movements relative thereto and rod-engaging means on said base plate assembly, angular movement of said rod in one direction enabling engagement of said rod by said rod-engaging means to fix the relative positions of said seat pan assembly and said base plate assembly, and angular movement of said rod in the opposite direction disengaging said rod from said rod-engaging means to enable the compression spring to be effective between said first and said second spring abutments.

Claim 7

A vehicle seat support as claimed in claim 1, which further includes a hydraulic damper connected between the front end of said seat pan assembly and the rear end of said base plate assembly.

Claim 8

A vehicle seat support which includes a rigidly connected base plate assembly intended to be secured to the floor of a vehicle, a first plate and a second plate each of which has two ends, corresponding one ends of said first and said second plates being pivotally connected to said base plate assembly, a seat pan assembly, the other corresponding ends of said first and said second plates being so pivotally connected to said seat pan assembly as to constitute a parallel links mechanism, a compression spring acting between said plate assemblY and said first plate, a cam mounted upon said base plate assembly for angular movements about an axis of rotation which is fixed in relation to said base plate assembly, said cam being polygonal and having a number of flat faces, angular movement of said cam about said axis moving one of said flat faces into an operative position in place of another of said flat faces which previously occupied said operative position, a stop plate carried by said first plate, said stop plate being urged into contact with whichever flat face of said cam is in said operative position whenever said seat pan assembly is unloaded, and spring means acting on said cam to maintain said cam in whatever setting it has been set.

Claim 9

A vehicle seat support which includes a rigidly connected base plate assembly intended to be secured to the floor of a vehicle, a first plate and a second plate each of which has two ends, corresponding one ends of said first and said second plates being pivotally connected to said base plate assembly, a seat pan assembly, the other corresponding ends of said first and said second plates being so pivotally connected to said seat pan assembly as to constitute a parallel links mechanism, a compression spring acting between said plate assemblY and said first plate, a cam mounted upon said base plate assembly for angular movements about an axis of rotation which is fixed in relation to said base plate assembly, said cam being polygonal and having a number of flat faces, angular movement of said cam about said axis moving one of said flat faces into an operative position in place of another of said flat faces which previously occupied said operative position, a stop plate carried by said first plate, said stop plate being urged into contact with whichever flat face of said cam is in said operative position whenever said seat pan assembly is unloaded, and spring means acting on said cam to maintain said cam in whatever setting it has been set.

Claim 10

A vehicle seat support as claimed in claim 7, which further includes a rod mounted on and extending transversely of said seat pan assembly for angular movements relative thereto, means forming a part of said base plate assembly and engageable by said rod to fix the relative positions of said seat pan assembly and said base plate assembly, and a handle attached to said rod and operable to swing said rod from the position thereof in which said rod engages said means to fix said relative positions as aforesaid to the other position thereof in which said rod is out of engagement with said means, the compression spring being effective between said first and said second spring abutments when said rod occupies said other position thereof.