Supports – Stand – Tilting support surface
Patent
1977-02-09
1978-11-14
Staab, Lawrence J.
Supports
Stand
Tilting support surface
248421, A45D 1904
Patent
active
041252420
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.
REFERENCES:
patent: 3085778 (1963-04-01), Korn
patent: 3194531 (1965-07-01), Langer
patent: 3285562 (1966-11-01), Langer
patent: 3339906 (1967-09-01), Persson
patent: 3390857 (1968-07-01), Nystrom
patent: 3599232 (1971-08-01), Tabor
patent: 3752432 (1973-08-01), Lowe
patent: 3761045 (1973-09-01), Sturhan
patent: 3826457 (1974-07-01), Huot de Longchamp
patent: 3888451 (1975-06-01), Lacey
patent: 3897036 (1975-07-01), Nystrom
Daunderer Heinz
Meiller Hermann
Messrs. Willibald Grammer
Staab Lawrence J.
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