GEORGE H GIBB
Engineering in Swampscott, MA
License number
Massachusetts 4980
Issued Date
Aug 6, 1948
Expiration Date
Jun 30, 1984
Type
Mechanical Engineer
Address
Address
Swampscott, MA 01907
Personal information
See more information about GEORGE H GIBB at radaris.comName
Address
Phone
11 Clark Rd, Swampscott, MA 01907
130 Phillips St, Quincy, MA 02170
4 Arbor Ln, Wilbraham, MA 01095
539 Miller St, Ludlow, MA 01056
597 Main St, Attleboro, MA 02703
Professional information
See more information about GEORGE H GIBB at trustoria.com
Valve Operator
Valve Operator
US Patent:
4082115, Apr 4, 1978
Filed:
Aug 16, 1976
Appl. No.:
5/714351
Inventors:
George H. Gibb - Swampscott MA
Henry A. Rabeau - Haverhill MA
Henry A. Rabeau - Haverhill MA
Assignee:
General Electric Company - Schenectady NY
International Classification:
F15B 1310, F16K 1114, F16K 31163
US Classification:
1376302
Abstract:
A valve operator for steam turbine inlet control valves, each of the control valves being set by a corresponding valve cam. The operator comprises pilot operated hydraulic means for positioning the valve cams in a normal or power mode of operation, mechanical means for positioning the valve cams in a back-up or manual mode of operation and manual actuation means for actuating the hydraulic means in a normal mode of operation and, in the event of failure of the hydraulic means, for automatically actuating the mechanical means in a back-up mode of operation. The hydraulic actuator positions the valve cams through a rack and pinion assembly. Both the hydraulic means and the mechanical means are actuated from an input shaft driving a reduction gear box. The mechanical means comprises a dog connected to the output of the gear box and a pin on the cam shaft driven by the dog in the manual mode of operation. In the hydraulic mode of operation a feedback cam and the pin are rotated faster than the dog, thereby precluding the engagement of the pin by the dog, so that the opening force is provided solely by the hydraulic means.