SE305142B - - Google Patents

Abstract

Abstract 1,129,819. Resiliently mounted seats. R. FRITZMEIER. 23 Dec., 1965 [23 Dec., 1964], No. 54704/65. Headings A4J and A4U. A tractor seat pan is carried on a swing- ing tubular arm 10, which contains resiliently urged links or gearing to permit vertical oscillation, while holding the seat level. As shown, a crank 15 is connected to the pan for angular movement therewith and is held parallel to fixed crank-14 by pivotally engaged, interconnecting rod 11. Tubular arm 10 is journalled on fixed shaft 20 of crank 14 and has its adjustable end 41 spaced from the end of crank 14 by plate springs 40. The height of the seat may be adjusted by screwing knob 42 to vary the compression of springs 40. A damping arrangement includes piston 43 on rod 11 moving in a liquid filled cylinder 44. The damping arrangement may be replaced by a compressible polymer or a rubber spring. Torsion springs may be used instead of compression springs. In Fig. 7 (not shown) a torsion bar (90) is mounted in a tubular extension (94) of crank shaft 17. In Fig. 8 (not shown), rubber torsion springs (100) are employed. Screw or worm means (92) may be used for pre-stressing these springs. In a modification (Fig. 5, not shown), a telescopic construction of arm 10 and rod 11 allows the distance and angle between the shafts 20 and 17 to be varied. Independent adjustment of the length of rod 11 may be used to vary the fore and aft inclination of the seat pan. In another form (Fig. 6, not shown) pinions (74) replace cranks 14 and 15 and a tubular shaft (72) having meshing bevel gears (73) is resiliently urged by a co-axial torsion spring (75) to support the seat load. Frictional damping is provided by brake (80) and a radial hydraulic damper (79) is employed.

Inventors

• 👤 W Wingen

Bibliographic Details