Floor jack apparatus and method

A method of moving a load, comprising:

• pumping a pump piston with a handle;
• drawing fluid from an oil reservoir to a pumping chamber by a vacuum created by the pumping;
• moving the fluid from the pumping chamber to a piston rod chamber by additional pumping of the pump piston;
• extending a piston rod to contact a load with the fluid in the piston rod chamber;
• and
• extending the piston further to move the load by increasing the amount of fluid acting on the piston rod when needed by setting a sequence valve that is pressed fitted and has a spherical ball to open at a predetermined pressure so that fluid is supplied in one direction to an inner chamber of the piston rod to move the piston rod.

A hydraulic floor jack, comprising:

• means for storing a hydraulic fluid;
• means for moving fluid into and out of a pumping chamber;
• means for channeling fluid from the pumping chamber to a piston rod chamber;
• means for lifting a load, wherein the means for lifting contains the piston rod chamber;
• means for increasing fluid in one direction that can act on the means for lifting when the means for lifting requires additional fluid to move a load, wherein the means for increasing fluid is pressed-fitted into the jack and has a spherical ball;
• and
• means for returning fluid allows fluid to move from the piston rod chamber to the oil reservoir.

A hydraulic jack, comprising

• an oil reservoir that stores a hydraulic fluid therein;
• an inner chamber axially disposed within the oil reservoir;
• a piston rod axially disposed within the inner chamber;
• a piston rod chamber is provided in the piston rod;
• a pump assembly having a pump piston that reciprocates therein and a pumping chamber that receives hydraulic fluid from the oil reservoir, wherein the pumping chamber's volume is between about ¼ to ¾ of the piston rod chamber's volume;
• a sequence valve that is press fitted into the hydraulic channel, held in place by a plug, includes a spherical ball having a hydraulic interacting surface and regulates fluid flow in one direction from the pumping chamber to the piston rod chamber and the inner chamber;
• hydraulic channels for fluid communication within the jack;
• a first inlet check valve that allows fluid to flow in one direction between the oil reservoir and the pumping chamber;
• a first outlet check valve that allows fluid to flow in one direction between the pumping chamber and the hydraulic channels;
• a second outlet check valve that allows fluid to flow in one direction between the hydraulic channels and the piston rod chamber;
• a second inlet that allows fluid to move from the hydraulic channels to a second chamber;
• a release valve that allows fluid to return from the piston rod chamber to the oil reservoir;
• a sealing member that provides a sealing relationship between the piston rod and an inner chamber wall;
• and
• a relief valve that relieves pressure of the jack at a predetermine pressure.