• All sections
• F - Mechanical engineering; lighting; heating; weapons; blasting
• F16K - Valves; taps; cocks; actuating-floats; devices for venting or aerating
• F16K 1/22 - Lift valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves

Patent holdings for IPC class F16K 1/22

Total number of patents in this class: 875

10-year publication summary

Principal owners for this class