Title:
OPENING AND CLOSING DEVICE OF VALVE
Document Type and Number:
Japanese Patent JPH0526368
Kind Code:
A
Abstract:
PURPOSE: To open and close a valve such as a butterfly valve by the minimum rotating operation force by using a handle or the like, at a minimum rotation frequency.
CONSTITUTION: The system is composed by providing an automatic transmission mechanism 200 to transmit the rotation of an operating shaft 10 to a reduction gear mechanism 100 for driving the valve rod by converting the reduction ratio largely in the reverse direction as the opening and closing force of the valve is made larger.
Inventors:
TOYODA KUNIYOSHI
Application Number:
JP18216291A
Publication Date:
February 02, 1993
Filing Date:
July 23, 1991
Export Citation:
Assignee:
KUBOTA KK
International Classes:
F16H37/02; F16H9/04; F16K31/53; (IPC1-7): F16H37/02; F16K31/53
Domestic Patent References:
| JPS30174Y1 | 1955-01-11 | |||
| JP37018412A |
Attorney, Agent or Firm:
Suzue Koichi
Next Patent: PROCESS FOR DECOMPOSING NITROGEN OXIDES