Leonard T. ARMSTRONG

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Worcester, MA, US

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Patents Grantslast 30 patents

Information Patent Grant
Electric actuator with a fail-safe mode of operation
- Patent number 10,480,633
- Issue date Nov 19, 2019
- METSO FLOW CONTROL USA INC.
- Leonard T. Armstrong
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Electric actuator with a fail-safe mode of operation
- Patent number 10,197,141
- Issue date Feb 5, 2019
- METSO FLOW CONTROL USA INC.
- Leonard T. Armstrong
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Fluid powered dual-piston actuator with efficient fluid porting and...
- Patent number 7,591,216
- Issue date Sep 22, 2009
- Metso Automation USA Inc.
- David Bayreuther
- F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL
Information Patent Grant
Assembly for live loading or valve packings
- Patent number 5,503,406
- Issue date Apr 2, 1996
- Neles-Jamesbury
- Leonard T. Armstrong
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...

Patents Applicationslast 30 patents

Information Patent Application
ELECTRIC ACTUATOR WITH A FAIL-SAFE MODE OF OPERATION
- Publication number 20190120359
- Publication date Apr 25, 2019
- Metso Flow Control USA INC.
- Leonard T. ARMSTRONG
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
ELECTRIC ACTUATOR WITH A FAIL-SAFE MODE OF OPERATION
- Publication number 20170122420
- Publication date May 4, 2017
- Metso Automation USA, Inc.
- Leonard T. ARMSTRONG
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
Fluid powered dual-piston actuator with efficient fluid porting and...
- Publication number 20070234899
- Publication date Oct 11, 2007
- Metso Automation USA Inc.
- David Bayreuther
- F15 - FLUID-PRESSURE ACTUATORS HYDRAULICS OR PNEUMATICS IN GENERAL