DAVID W JOHNSON
Broker in Shrewsbury, MA
License number
Pennsylvania RMR001524
Category
Real Estate Commission
Type
Broker Multi-Licensee-Reciprocal
Address
Address
2
Shrewsbury, MA 01545
Pennsylvania
Pennsylvania
Personal information
See more information about DAVID W JOHNSON at radaris.comName
Address
Phone
49 Maple Ave, Bridgewater, MA 02324
4 Briarcliff St, Worcester, MA 01602
4 Kathleen Dr, Beverly, MA 01915
4 Madeline Ter, Tyngsboro, MA 01879
4 Mount Cushing Ter #2, Dorchester, MA 02125
Professional information
Valve Assembly And Disassembly Device
US Patent:
4390039, Jun 28, 1983
Filed:
Sep 20, 1982
Appl. No.:
6/420382
Inventors:
David A. Johnson - Shrewsbury MA
Joseph B. Wright - Northboro MA
Michael Pashoogian - Worcester MA
Joseph B. Wright - Northboro MA
Michael Pashoogian - Worcester MA
Assignee:
Jamesbury Corporation - Worcester MA
International Classification:
F16K 4300, F16K 2500
US Classification:
137315
Abstract:
A device for enabling the assembly and disassembly of a top entry ball valve takes the form of a pin formed from rod-like material with a conical end. When the pins are inserted into the top surface of the valve housing the spring loaded valve seats are forced backwardly by the advance of the sloped face of the pins. In a second embodiment, the ends of the pins are teardrop shaped. After the pins are inserted, they are rotated 90. degree. causing the seat to be pushed back by the larger diameter of the pin.
Valve Assembly And Disassembly Device
US Patent:
4388945, Jun 21, 1983
Filed:
Jan 4, 1982
Appl. No.:
6/336686
Inventors:
David A. Johnson - Shrewsbury MA
Joseph B. Wright - Northboro MA
Michael Pashoogian - Worcester MA
Joseph B. Wright - Northboro MA
Michael Pashoogian - Worcester MA
Assignee:
Jamesbury Corporation - Worcester MA
International Classification:
F16K 4300, F16K 2500
US Classification:
137315
Abstract:
A device for enabling the assembly and disassembly of a top entry ball valve takes the form of a pin formed from rod-like material with a conical end. When the pins are inserted into the top entry of the valve housing the spring loaded valve seats are forced backwardly by the advance of the sloped face of the pins. In a second embodiment, the ends of the pins are teardrop shaped. After the pins are inserted, they are rotated 90. degree. causing the seat to be pushed back by the larger diameter of the pin.