Ring for concrete pump
AssigneeKennametal Inc.
InventorsGary J. Condon, Mark T. Klingensmith, James Cavanaugh
Life of this patent
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Abstract
A pivot pipe for a two-cylinder thick material sludge pump is designed to reduce the rate of wear of the sealing surfaces and flow bores of the pivot pipe and cooperating outlets on the two pump cylinders. As the pivot pipe oscillates from one pump cylinder to the other pump cylinder the contacting sealing surfaces are subjected to abrasion and impact wear. The present invention limits the rate of wear between the contacting sealing surfaces and a portion of the flow bore by fixing monolithic wearing rings on the upstream end of the pivot pipe and on the outlets of the two pump cylinders. The monolithic wearing rings are made of a hard materials such as cemented tungsten carbide.
Claims27
A two-cylinder pump for pumping a thick material sludge comprising:
- a pivot pipe, where the pivot pipe is pivotal in front of a plate disposed between an upstream end of said pivot pipe and two pump cylinders,
- container wearing rings are positioned within an opening in said plate,
- wherein said container wearing rings include a monolithic sealing surface.
A two-cylinder pump for pumping a thick material sludge comprising:
- a pivot pipe, where the pivot pipe is pivotal in front of two pump cylinders,
- wherein said pivot pipe includes a wearing ring positioned on an upstream end of said pivot pipe,
- wherein said pivot pipe wearing ring includes a monolithic sealing surface.
A two-cylinder pump for pumping a thick material sludge comprising:
- a pivot pipe, where the pivot pipe is pivotal in front of a plate disposed between two pump cylinders and an upstream end of said pivot pipe,
- a pivot pipe wearing ring is positioned on an upstream end of said pivot pipe,
- and container wearing rings are fixed to an opening in said plate,
- wherein said container wearing rings and said pivot pipe wearing ring each include a monolithic sealing surface.
A ring for a pump comprising:
- an inner flow ring and holding ring, wherein said inner flow ring is monolithic and forms a sealing surface and a flow bore portion for providing wear resistance against abrasion and impact of material flow.
Dependencies are inferred from the claim text.