Chairs and seats – Armrest movable to diverse use position
Patent
1984-12-13
1986-11-11
Lyddane, William E.
Chairs and seats
Armrest movable to diverse use position
297356, 297411, 297417, A47C 754
Patent
active
046218645
ABSTRACT:
A tiltable operator's seat assembly for a backhoe has detachable independently tiltable arm rest assemblies pivotally mounted on opposite sides thereof. The seat assembly is tiltable between normal, mid-tilt and full-tilt positions. Each arm rest assembly is independently tiltable upwardly from a full-down (stored) tilt position, to normal-tilt, to mid-tilt or to high-tilt positions. An operating mechanism in the arm rest assembly enables it to be releasably locked in the selected tilt position. The arm rest assembly cannot be moved downwardly from one tilt position to a lower tilt position. Upward pivoting of the arm rest from the high-tilt position to a reset position operates the operating mechanism to effect unlocking and enable the arm rest assembly to be swung to full-down (stored) tilt position for storage or for repositioning. The arm rest assembly includes an arm rest plate and the operating mechanism includes a pivot shaft non-rotatably secured to the seat assembly and upon which the arm rest plate is pivotally mounted. A pawl is rigidly secured to the pivot shaft and a latch member is pivotally mounted on the arm rest plate and has teeth which are releasably engageable with the pawl. A connecting rod is pivotally connected between the pawl and latch member, and an overcenter spring is connected between the latch member and the arm rest plate. A biasing spring connected between the pawl and arm rest plate prevents accidental disengagement of the pawl and latch member and consequent loss of a selected tilt position in the event of severe road shock or the like.
REFERENCES:
patent: 773720 (1904-11-01), Drury
patent: 970635 (1910-09-01), Matthes
patent: 4073538 (1978-02-01), Hunter
patent: 4307913 (1981-12-01), Spiegelhoff
patent: 4370898 (1983-02-01), Maruyama
Brown Peter R.
Lyddane William E.
Milsco Manufacturing Company
Nilles James E.
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