Robert M Thorne

Author:

Robert Thorne

ISBN #:

0720117739

Author:

Robert Thorne

ISBN #:

0851390994

Author:

Robert Thorne

ISBN #:

0856704024

Author:

Robert Thorne

ISBN #:

0860787591

US Patent:

20150253786, Sep 10, 2015

Filed:

Nov 24, 2014

Appl. No.:

14/551821

Inventors:

- Schaffhausen, CH
Robert M. Thorne - Franklin MA, US
Peter A. Jordan - Harrisville RI, US

International Classification:

G05D 16/06
F16K 31/126

Abstract:

A valve assembly for high pressure applications includes a pre-charge chamber in fluid communication with a first bellows, at least one inlet for pressurized gas to enter the assembly, a system poppet and an outlet for releasing pressurized gas into a desired environment. The pre-charge chamber and first bellows are filled with pre-charge gas to a threshold pressure. Pressurized gas can flow through access channels into a second bellows, which expands to move a valve shaft connected to the poppet assembly to open the poppet and allow the release of gas. The expansion of the second bellows pushes incompressible fluid disposed between the two bellows against the first bellows, thus contracting the first bellows. The gas within each bellows maintains an internal pressure equal to the pressure exerted upon each bellows by the incompressible fluid, so as to minimize differential pressure across the bellows in the extended position.