Title of Invention

"A PISTON TYPE PUMPING APPARATUS"

Abstract

A piston type pumping apparatus comprises a vertically oriented cylinder having a top and a bottom with a first aperture. There are first and second passageways for liquid in the cylinder at the top and bottom respectively thereof. A piston is reciprocatingly mounted within the cylinder and has an area against which pressurized fluid acts in the direction of movement of the piston. A hollow piston rod is connected to the piston and extends below the piston and slidably through the first aperture. There is a reload chamber below the cylinder. The piston rod extends slidably into the reload chamber and has a third passageway for liquid communicating thereto. A first one-way valve is located in the third passageway. There is also a fourth passageway that extends from the reload chamber to a source of liquid to be pumped and a second one-way valve therein.

Full Text

I claim: 1. A piston type pumping apparatus (20), comprising: a vertically oriented cylinder (26) having a top and a bottom, the bottom having a first aperture (44); a first passageway (32) for liquid in the cylinder (26) at the top thereof; a second passageway (34) for liquid in the cylinder (26) at the bottom thereof; a reload chamber (46) located below the cylinder (26) and having a second aperture located at the top thereof; a piston (40) reciprocatingly mounted within the cylinder (26) and having a top area against which pressurized liquid acts in a direction of movement of the piston (40); a hollow piston rod (42) connected to the piston (40) and extending below the piston (40) slidably and sealingly through the first aperture in the bottom of the cylinder and slidably and sealingly through the second aperture in the top of the reload chamber into the reload chamber (40), and having a third passageway for liquid to communicate with the reload chamber (46), the piston rod (42) having a smaller bottom area within the reload chamber (46) upon which pressurized liquid in the reload chamber (46) acts in the direction of movement of the piston (40) and piston rod (42) compared to the top area of the piston (40), so that liquid in the cylinder (26) acting on the piston when the apparatus is in use exerts a greater force on the top area of the piston (40) than liquid in the reload chamber (46) acting against the smaller bottom area of the piston rod (42); a first one-way valve (41) located in the third passageway which permits liquid to flow from the reload chamber (46) into and above the piston rod (42) and prevents liquid from flowing back through the piston rod (42) into the reload chamber (46); a fourth passageway for liquid extending from the reload chamber (46) to a source chamber (70); a second one-way valve (52) in the fourth passageway which permits liquid to flow from the source chamber (70) into the reload chamber (46) and prevents liquid from flowing from the reload chamber (46) towards the source chamber (70); and, a receiver (80) connected to the second passageway (34) for storing pressurized liquid displaced below the piston (42), as the piston (42) moves downwardly, and to assist in raising the piston (42) and, accordingly, liquid contained within the piston rod (42), to pump liquid upwardly and through the first passageway. 2. The apparatus as claimed in claim 1 wherein the receiver additionally comprises hydraulic liquid. 3. The apparatus as claimed in claim 2 comprising a pump connected to the receiver to raise the piston (40). 4. The apparatus as claimed in claim 3, wherein the pump comprises a piston type pump. 5. The apparatus as claimed in claim 4, wherein the pump is located above the second passageway (34). 6. The apparatus as claimed in claim 3, wherein the pump comprises a centrifugal pump (128). 7. The apparatus as claimed in claim 6 comprising a fifth passageway (34.1) for liquid adjacent to the bottom of the cylinder (26), a first conduit (122, 126) connecting the fifth passageway (130) to the pump and a second conduit (132) connecting the second passageway to the body of liquid, 8. The apparatus as claimed in claim 7 comprising a third one-way valve (120) adjacent to the second passageway (130) in the second conduit (132).

Documents:

4770-DELNP-2006 (Petition SKG).pdf

4770-delnp-2006-1-Correspondence Others-(15-04-2014).pdf

4770-delnp-2006-1-Petition-137-(15-04-2014).pdf

4770-delnp-2006-Abstract-(15-04-2014).pdf

4770-delnp-2006-Abstract-(22-05-2013).pdf

4770-delnp-2006-Claims-(15-04-2014).pdf

4770-delnp-2006-Claims-(22-05-2013).pdf

4770-delnp-2006-Correspondance Others-(17-04-2013).pdf

4770-delnp-2006-Correspondence Others-(05-04-2013).pdf

4770-delnp-2006-Correspondence Others-(11-09-2013).pdf

4770-delnp-2006-Correspondence Others-(15-04-2014).pdf

4770-delnp-2006-Correspondence Others-(16-09-2013).pdf

4770-delnp-2006-Correspondence Others-(22-05-2013).pdf

4770-delnp-2006-Correspondence Others-(29-11-2013).pdf

4770-delnp-2006-Correspondence-Others-(09-04-2013).pdf

4770-delnp-2006-correspondence-others-1.pdf

4770-delnp-2006-Description (Compete)-(22-05-2013).pdf

4770-delnp-2006-Drawings-(11-09-2013).pdf

4770-delnp-2006-form-18.pdf

4770-delnp-2006-Form-2-(22-05-2013).pdf

4770-delnp-2006-Form-3-(09-04-2013).pdf

4770-delnp-2006-Form-3-(29-11-2013).pdf

4770-delnp-2006-Form-5-(22-05-2013).pdf

4770-delnp-2006-GPA-(15-04-2014).pdf

4770-delnp-2006-GPA-(22-05-2013).pdf

4770-delnp-2006-Petition-137-(16-09-2013).pdf