4. Fluid reaction surfaces (i.e., impellers)
  5. Radially extensible or retractible rotor working member
  6. Variable work surface or non-rigid connection

Sidney L. Barker

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High lift scissor jack

Elevator – industrial lift truck – or stationary lift for vehicle – Stationary lift for roadway vehicle or required component... – Having specific drive means for support
Patent

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Retractable blade for a helicopter rotor

Fluid reaction surfaces (i.e. – impellers) – Radially extensible or retractible rotor working member – Variable work surface or non-rigid connection
Patent

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Universal joint boom

Machine element or mechanism – Control lever and linkage systems – Multiple controlling elements for single controlled element
Patent

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Profile ID: LFUS-PAI-P-20407

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