1. Vehicle seat, especially an aircraft passenger seat, with at least one seat component which can be adjusted in its position, such as a seat part which can be mounted with its seat frame structure (3) by way of swivelable support legs above a floor structure (1), the support legs (7, 11) acting on the seat frame structure (3) in pairs in the area of the front edge (9) and rear edge (5) of the seat of the seat part, and with an actuating mechanism (39, 41) which is connected by action to a pair of support legs (7, 11) for producing a swiveling motion of the support legs (7, 11) which causes a change in the position of the seat part, characterized in that the actuating mechanism is coupled to the assigned pair of support legs (7, 11) by way of a differential mechanism (13, 31) which converts the swiveling motion of the support legs (11) into a change of the effective length of the assigned pair of support legs (11), which length determines the vertical distance between the seat frame structure (3) and the floor structure (1):
2. The vehicle seat as claimed in claim 1, wherein the seat part can be adjusted between an initial position which is the rear position relative to the direction of travel, and an end position which is displaced forward, and wherein the differential mechanism (13, 31) matches the effective length of the support pair (11) which is connected to it to the effective length of the other support pair (7) which can be changed when the position is adjusted.
3. The vehicle seat as claimed in claim 1, wherein the differential mechanism is formed by a mechanical lever mechanism (13, 31).
4. The vehicle seat as claimed in claim 3, wherein the lever mechanism for each support leg (11) of the assigned pair has a bell crank lever (13), one lever arm (25) of which is articulated to the end of the pertinent support leg (11), which end is adjacent to the floor structure (1), and its other lever arm (23) is articulated to the floor structure (1).
5. The vehicle seat as claimed in claim 4, wherein the lever arms (23, 25) of the bell crank levers (13) include an obtuse angle with one another and are permanently connected to one another at a distance from their coupling points (29, 15) to the support leg (11) and to the floor structure (1) by a shaft (31) which extends through between the support legs (11) and imparts common motion to the bell crank levers (13).
6. The vehicle seat as claimed in claim 5, wherein the actuating mechanism has a controllable power drive (41) which acts on the shaft (31) and with the bell crank levers (13) connected to it applies an actuating force which produces a torque for the swiveling motion of the bell crank levers (13) around their coupling point (15) to the floor structure (1).
7. The vehicle seat as claimed in claim 6, wherein the power drive is a linear drive (41) with a driving element (39) which is articulated at a distance from the axis of the shaft (31) to a projection (35) which extends away from the shaft.
8. The vehicle seat as claimed in claim 6, wherein an actuating force can be applied to the bell crank levers (13) by means of the linear drive (41) of the actuating mechanism and this force causes a displacement motion of the seat part forward by way of the assigned pair of support legs (11).
9. The vehicle seat as claimed in claim 5, wherein a second power drive (49) acts on the shaft (31) and applies a reset force to the bell crank levers (13), which force seeks to produce motion of the pairs of support legs which causes displacement motion of the seat part backwards.
10. The vehicle seat as claimed in claim 9, wherein there is an energy accumulator, especially a pressurized spring (49), as the second power drive.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A pump comprising a shaft supported for rotation by a bearing carried by a bearing carrier, said bearing carrier having a generally outer radial portion which is fixed relative to a pump housing and a generally inner radial portion which is fixed relative to the bearing, wherein the carrier is stiff in a radial direction between said inner and outer portions and flexible in an axial direction for restraining radial movement of the bearing and allowing axial movement.
2. A pump as claimed in claim 1, wherein the bearing carrier is pre-loaded to apply an axial force on said bearing in a first axial direction for resisting axial movement of the bearing in a second axial direction.
3. A pump as claimed in claim 2, wherein the bearing carrier is internally biased to provide said pre-loaded axial force.
4. A pump as claimed in claim 2, comprising a spring located between the housing and one of the inner portion of the bearing carrier or the bearing for providing said pre-loaded axial force.
5. A pump as claimed in any of the preceding claims, wherein the bearing carrier has a middle portion between the inner and outer radial portions which is stiff in the radial direction and flexible in the axial direction.
6. A pump as claimed in claim 5, wherein the middle portion comprises a plurality of generally radially extending support portions spaced apart by openings through the bearing carrier.
7. A pump or bearing carrier substantially as described and illustrated in the accompanying figures herein.