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These types of valves are also known as automatic control valves. The hydraulic actuators respond to changes of pressure or flow and will open/close the valve. Automatic control valves do not require an external power source, meaning that the fluid pressure is enough to open and close them.
Article 84 of the European Patent Convention (EPC) [1] specifies that the "matter" for which patent protection is sought, i.e. requested, in an application - the purported invention - shall be stated ("defined") in the claims. This legal provision also requires that the claims must be clear and concise, and supported by the description. [1]
A rotary valve (also called rotary-motion valve) is a type of valve in which the rotation of a passage or passages in a transverse plug regulates the flow of liquid or gas through the attached pipes. [1] The common stopcock is the simplest form of rotary valve. Rotary valves have been applied in numerous applications, including:
(2) the claimed invention was described in a patent issued under section 151, or in an application for patent published or deemed published under section 122(b), in which the patent or application, as the case may be, names another inventor and was effectively filed before the effective filing date of the claimed invention.
Due to the great variety of the designs and the number of countries in which they were created, it is difficult to trace the origin of many. Patents that cover designs similar to those below include: 1876: Hose-coupling, No. 175,232. [1] Coupling for hose and pipe. US 894900 A [2] 1915: Coupling. US 1248558 A [3] 1931: Coupling. US 1947593 A [4 ...
This means that they are installed as a component of the completion string and run in during completion. Retrieving the valve, should it malfunction, requires a workover. The full name for this most common type of downhole safety valve is a Tubing Retrievable Surface Controlled Sub-Surface Valve, shortened in completion diagrams to TRSCSSV.
Gary Gensler is set to leave his post in just a month’s time, but the controversial chair of the Securities and Exchange Commission is continuing his agency’s aggressive campaign against the ...
According to the case law of the Boards of Appeal, if a European patent contains a feature that was not disclosed in the application as filed (in contravention of Article 123(2) EPC) and if the removal of this feature would extend the scope of protection beyond the scope conferred by the patent as granted (in contravention of Article 123(3) EPC ...
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