Power transfer unit with breakout friction reduction and leakage reduction

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 11905980
APP PUB NO 20220228609A1
SERIAL NO

17614799

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A power transfer unit includes a first hydraulic circuit, a second hydraulic circuit fluidly connected to the first hydraulic circuit, a pump and motor assembly fluidly connected between the first hydraulic circuit and the second hydraulic circuit, an isolation valve arranged along the first hydraulic circuit and fluidly connected to an inlet of the pump and motor assembly. The isolation valve is movable between a closed position and an open position to prevent and enable high-pressure fluid flow to the inlet, respectively. An unloader valve is arranged along the second hydraulic circuit and fluidly connected to an outlet of the pump and motor assembly, and an orifice is arranged along the second hydraulic circuit and fluidly connected to the unloader valve to reduce back pressure in the second hydraulic circuit.

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Patent Owner(s)

Patent OwnerAddress
PARKER-HANNIFIN CORPORATION6035 PARKLAND BOULEVARD CLEVELAND OH 44124

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Johns, Scott N Butte, US 1 0
Krane, Steven A Cochise, US 1 0
Pollee, Dean R Mattawan, US 4 2
Scranton, David A Kalamazoo, US 1 0
Strehlow, Bernard J Otsego, US 2 3

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