4. Boring or penetrating the earth
  5. With tool drive prime mover or above-ground mechanical...

Dale H. Pryor

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Fluid end for reciprocating pump

Pumps – Expansible chamber type – Valved piston
Patent

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Helicopter transportable mud pump

Pumps – Changeable by assembly or disassembly
Patent

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Hydrodynamic brake

Brakes – Internal-resistance motion retarder – Using a rotary-type fluid damper
Patent

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Powder welding of two members

Electric heating – Metal heating – For bonding with pressure
Patent

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Swivels

Boring or penetrating the earth – With tool drive prime mover or above-ground mechanical...
Patent

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Profile ID: LFUS-PAI-P-116521

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