Driving device for extending and withdrawing operative members o

Details Driving device for extending and withdrawing operative members o Driving device for extending and withdrawing operative members o

1988-06-10

1989-12-05

Herrmann, Allan D.

Machine element or mechanism

Mechanical movements

Rotary to or from reciprocating or oscillating

74 2, 74 46, 74 48, 185 37, 244173, F16H 2140

Patent

active

048844640

ABSTRACT:
A rotatable arm carrying an operative member is pivoted on a main housing (10) for movement between a rest position and a work position. A rotary shaft (28) is also journaled in the housing and can be driven by a wound spring (34) for rotary movement, which is transformed into a reciprocating, partial rotation of the arm by a linkage comprising meshing gears (18, 22) on the arm and on a fixed axis, and a crank and slotted link (24, 26, 30) between said shaft and the gears. A first and a second locking units (12, 14) are mounted stationarily with respect to the housing, each comprising a spring-biased pawl (40, 42) to engage the arm when it reaches said rest position and said work position, respectively, and each being releasable by an external control.

REFERENCES:
patent: 3460992 (1969-08-01), Avilov et al.
patent: 3587999 (1971-06-01), Miniovitch
patent: 4561614 (1985-12-01), Olikara et al.
patent: 4641798 (1987-02-01), DeHaan et al.

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