JAMES MACGREGOR
Engineers in Washington
License number
Pennsylvania PE008175L
Category
Engineers
Type
Professional Engineer
Address
Address
2
Washington
Claysville, PA 15323
Claysville, PA 15323
Professional information
Valve Stem Actuator
US Patent:
4460009, Jul 17, 1984
Filed:
Sep 7, 1982
Appl. No.:
6/415676
Inventors:
James R. Nanci - Pittsburgh PA
James MacGregor - Claysville PA
James MacGregor - Claysville PA
Assignee:
Ralph A. Hiller Company - Pittsburgh PA
International Classification:
F16K 31122, F16K 3154
US Classification:
1372436
Abstract:
A valve stem actuator for a slurry valve or the like includes a support frame extending from the valve body to a linear operator having a cylinder and piston. Means are provided for connecting the piston rod to the valve stem and means reciprocally mounted on the support frame rotate the valve stem with respect to the valve body independently of the linear movement of the valve stem to dislodge accumulated crust to permit the valve disc to properly seat to prevent fluid flow through the valve. The linear operator is preferably pneumatically or hydraulically actuated and the rotary actuator preferably comprises an air or hydraulically actuated rack engageable with the valve stem. The valve stem actuator is useful for new valves or for retrofit of present slurry valves or the like.