Valve drive unit and series thereof

Details Valve drive unit and series thereof Valve drive unit and series thereof

2005-07-19

2005-07-19

Bastianelli, John (Department: 3751)

Valves and valve actuation

Mechanical movement actuator

Gear

C137S269000, C475S168000, C475S179000

Reexamination Certificate

active

06918572

ABSTRACT:
A series of electric valve drive units is provided, which can set up rotational efficiency and anti-counter-rotating function of a valve. In a series of electric valve drive units which can drive a valve body via reduction gears, at least one gear mechanism of the reduction gears is provided with an eccentric wobbling inscribed gear type of a planetary gear mechanism which has an input shaft, an external gear eccentrically and wobbly rotating about the input shaft, an internal gear engaged with the external gear, and a carrier absorbing a wobbling ingredient of the external gear. At least two types of valve drive units are supplied, one of which places prime importance on the anti-counter-rotating function, and the other places prime importance on the rotational efficiency.

REFERENCES:
patent: 1784094 (1930-12-01), Fletcher
patent: 5433672 (1995-07-01), Tanaka et al.
patent: 5533942 (1996-07-01), Fukaya
patent: 5536218 (1996-07-01), Fukaya et al.
patent: 5651747 (1997-07-01), Minegishi et al.
patent: 6440030 (2002-08-01), Minegishi et al.
patent: 3054540 (2000-04-01), None
patent: 2000-314456 (2000-11-01), None

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