Electricity: motive power systems – Positional servo systems – Digital or numerical systems
Patent
1989-06-22
1991-10-22
Ip, Paul
Electricity: motive power systems
Positional servo systems
Digital or numerical systems
318601, 318434, 318286, H02K 1734
Patent
active
050598791
ABSTRACT:
When abnormal torque occurs in a valve, water gate, etc., it changes speed of a load shaft in a reduction gears, which is transmitted from a worm to a rotary encoder via a main shaft connected to an electric motor and gears. An electric signal is fed from the rotary encoder to a microcomputer in which the abnormal torque is identified to stop the elctric motor. The microcomputer also identifies a full-opening point and a complete-closing point of the valve to stop the electric motor.
REFERENCES:
patent: 3757131 (1973-09-01), Krutz et al.
patent: 3940675 (1976-02-01), Schroeder
patent: 3997826 (1976-12-01), Mayer
patent: 4084120 (1978-04-01), Lund
patent: 4097786 (1978-06-01), Lund
patent: 4126818 (1978-11-01), Taylor
patent: 4131838 (1978-12-01), Etoh et al.
patent: 4147966 (1979-04-01), Kain et al.
patent: 4193019 (1980-03-01), Killian
patent: 4305029 (1981-12-01), Takahashi
patent: 4360769 (1982-11-01), Selkey et al.
patent: 4364111 (1982-12-01), Jocz
patent: 4445075 (1984-04-01), Fry
patent: 4491775 (1985-01-01), Harvey et al.
patent: 4510424 (1985-04-01), Doniwa
patent: 4547844 (1985-10-01), Adams
patent: 4575666 (1986-03-01), Nakashima et al.
patent: 4591772 (1986-05-01), Hollow
patent: 4647827 (1987-03-01), Toyoda et al.
patent: 4657447 (1987-04-01), Faulstich et al.
patent: 4719396 (1988-01-01), Shimizu
patent: 4827203 (1989-05-01), Sakano
Limitorque, Valve Controls, Bulletin 871, Copyright 1971, Limitorque Corporation, pp. 1-18.
Ip Paul
Nippon Gear Co., Ltd.
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