STEVEN R CALLA
Water and Wastewater in Winthrop Hlds, MA
License number
Massachusetts 20618
Issued Date
Jul 15, 2007
Expiration Date
Dec 31, 2009
Type
Drinking Water Operator
Address
Address
Winthrop Hlds, MA 02152
Professional information
Security Valve
US Patent:
2013001, Jan 17, 2013
Filed:
Jul 15, 2011
Appl. No.:
13/183736
Inventors:
Glen Calla - Winthrop MA, US
Steven Calla - Winthrop MA, US
Steven Calla - Winthrop MA, US
International Classification:
F16K 35/00
US Classification:
137551, 251 89
Abstract:
A security valve having a body, a fluid control device, and an internal locking structure. The internal locking structure allows for partial movement of the valve before locking the fluid control device in place. A piping system based on the valve.