VALVE ASSEMBLY

• US 3,621,877 A
• Filed: 05/18/1970
• Issued: 11/23/1971
• Est. Priority Date: 05/18/1970
• Status: Expired due to Term

• Current Assignee: Horst R. Hickmann
• Original Assignee: Horst R. Hickmann
• Inventors: Hickmann, Horst R.
• Primary Examiner(s): Klinksiek, Henry T.
• Application Number:
  US05/038,107
• Time in Patent Office: 554 Days
• Field of Search: 138/94,94.3 137/595,610,625.4,625.42,625.48
• US Class Current: 137/595
• CPC Class Codes: F04B 15/023 supply of fluid to the pump by gravity through a hopper, e.g. without intake valve
• CPC Class Codes: F04B 7/0225 and having a slidable movement
• CPC Class Codes: F04B 7/025 and having a slidable movement
• CPC Class Codes: F04B 7/0266 the inlet and discharge means being separate members
• CPC Class Codes: F16K 27/044 slide valves with flat obturating members
• CPC Class Codes: Y10T 137/87161 With common valve operator

Abstract

A valve assembly for use in pump means for flowable or semiflowable material, said valve assembly comprising a hollow valve body having a pair of opposite sides, a top, a bottom and end portions. The valve body is divided into two chambers in side-by-side relationship. Each of said opposite sides of said valve body having two large, circular openings therethrough, each opening communicating with one of said chambers. A disposable liner is provided for each of said chambers and forms in conjunction with the openings in the valve body to its respective chamber, a passage through the valve body which has an interior configuration which conforms to the circular openings in the valve body sides and is rectangular within the valve body. The valve assembly includes a pair of flat, opposed, coplanar blades. Each blade extends through an opening in one of the ends of said valve body and a mating hole in the adjacent liner. Each blade is longitudinally slidable within the rectangular portion of its respective liner. Means are provided to simultaneously shift said blades between a first position wherein one of said blades fully closes its respective passage, the other passage being fully open, and a position wherein the other of said blades fully closes its respective passage, the remaining passage being fully open.

Claims

1. A valve assembly for use with flowable and semiflowable material comprising a rectangular, hollow valve body having opposite sides, a top portion, a bottom portion and end portions, means within said valve body dividing said valve body transversely of its long axis into two chambers, each of said opposite sides of said valve body having a circular perforation communicating with each of said chambers, said perforations in said sides communicating with the same one of said chambers being coaxial, a hollow, disposable liner within each of said chambers, each of said disposable liners having an exterior surface conforming to the interior surface of its respective chamber, the interior of each of said liners forming a passage through said valve body between the adjacent pair of said coaxial perforations in said valve body sides, the end portions of each of said passages having a circular cross section of the same diameter as said coaxial perforations in said valve body sides between which it extends, each of said passages having a central portion of rectangular cross section, those portions of said passage between said circular end portions and said rectangular central portion comprising smooth uninterrupted surfaces, said valve assembly having a pair of flat, rectangular blades, each of said blades extending through an opening in one of said end portions of said valve body and an adjacent opening in one of the sides of said central rectangular portion of one of said liners, each of said blades being reciprocable within said central rectangular portion of its respective liner between a position wherein said passage formed by said liner is open and a position wherein said passage is closed.

2. The structure claimed in claim 1 wherein each of said liners is made up of two identical liner halves, said liner halves having interengaging top and bottom edge portions centrally of said portion of said passage having a rectangular cross section.

3. The structure claimeD in claim 1 wherein said valve body comprises first and second body halves, said fist and second body halves having abutting surfaces in a plane parallel to the longitudinal centerline of said valve body and perpendicular to the transverse centerline of said valve body.

4. The structure claimed in claim 1 including means to reciprocate said blades between their respective passage opening and passage closing positions.

5. The structure claimed in claim 4 wherein said blades are connected to the same blade reciprocating means, whereby said blades move in the same direction simultaneously and one of said blades is in its passage opening position when the other of said blades is in its passage closing position, and vice versa.

6. The structure claimed in claim 5 wherein said blade reciprocating means comprises a first hydraulic cylinder affixed to said top portion of said valve body and a second hydraulic cylinder affixed to said bottom portion of said valve body, each of said first and second cylinders having a piston with piston rods extending through both ends of its respective cylinder, said piston rods of each of said cylinders extending in opposite directions and being parallel to the longitudinal centerline of said valve body, the free ends of those piston rods of both of said cylinders which extend in the same direction being joined by a plate extending therebetween, each of said blades being mounted on one of said plates.

7. The structure claimed in claim 6 wherein said valve body comprises first and second halves, said first and second body halves having abutting surfaces in a plane

8. The structure claimed in claim 1 wherein said openings in said liners through which said blades extend are configured to form an air and watertight seal with their respective blades.

9. The structure claimed in claim 8 including means on either side of each of said openings in said liners through which said blades extend to inject oil on said blades.

10. The structure claimed in claim 1 wherein that side of said rectangular portion of each of said liners opposite said side having said blade receiving opening therein is provided with an opening to accommodate an anvil member, there being two anvil members mounted on opposite sides of said means dividing said valve body into said chambers, each anvil member extending the length of said side of its respective liner through which it extends, each anvil member being positioned to be in abutting relationship with the end of one of said blades when said blades are in their passage closing positions, the abutting surfaces of said blades and said anvils being configured to crush any particulate material lodged therebetween.