Spring mounted seat with height adjustment
First Claim
1. A seat of adjustable height having a seat part coupled by a connecting element to a supporting lever acted upon by supporting spring means, the lever being swingable against the action of the supporting spring means by a load acting on the seat part, the connecting element being adjustable relative to the supporting lever to change the height of the seat part, the improvement which comprises a locking device to lock said connecting element to said supporting lever in different relative positions, said locking device being comprised of a toothed segment, a detent co-operating with said toothed segment resiliently biased towards a position of engagement with said toothed segment, and a disengaging element which may act upon said detent to disengage said detent from said toothed segment, said locking device locking said connecting element and said supporting lever in a series of relative positions as said seat part is raised and wherein said locking device is placed in a disengaged condition when said seat part reaches an upper end position and is maintained in such disengaged condition until said seat part is lowered to a lower end position.
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Accused Products
Abstract
There is proposed a seat of adjustable height having a seat part coupled by a connecting element to a supporting lever acted upon by supporting spring means, the lever being swingable against the action of the supporting spring means by a load acting on the seat part. In order to enable easy height adjustment with a simple construction in such a seat the connecting element is adjustable relative to the supporting lever to change the height of the seat part and a locking device is provided by means of which the connecting element and the supporting lever can be locked in several different relative positions. To enable height adjustment without use of a special lever the locking device may be constructed to lock the connecting element and the supporting lever in a series of relative positions as the seat part is raised and when the seat part reaches an upper end position to set itself in a disengaged condition which is maintained until the seat part is lowered to a lower end position. A very useful supporting spring means may be obtained if the supporting lever has at its free end a run-up cam which acts upon a sliding element displaceable against the action of the supporting spring means such that when the seat is loaded the swing of the supporting lever is converted into a linear motion of the sliding element and tensions the spring means.
51 Citations
12 Claims
- 1. A seat of adjustable height having a seat part coupled by a connecting element to a supporting lever acted upon by supporting spring means, the lever being swingable against the action of the supporting spring means by a load acting on the seat part, the connecting element being adjustable relative to the supporting lever to change the height of the seat part, the improvement which comprises a locking device to lock said connecting element to said supporting lever in different relative positions, said locking device being comprised of a toothed segment, a detent co-operating with said toothed segment resiliently biased towards a position of engagement with said toothed segment, and a disengaging element which may act upon said detent to disengage said detent from said toothed segment, said locking device locking said connecting element and said supporting lever in a series of relative positions as said seat part is raised and wherein said locking device is placed in a disengaged condition when said seat part reaches an upper end position and is maintained in such disengaged condition until said seat part is lowered to a lower end position.
Specification