PUMP DEVICES FOR FEEDING PASTY MASSES

• US 20160040659A1
• Filed: 02/19/2015
• Published: 02/11/2016
• Est. Priority Date: 01/16/2009
• Status: Abandoned Application

• Current Assignee: Friedrich Schwing, Stefan Schwing
• Original Assignee: Friedrich Schwing, Stefan Schwing
• Inventors: Schwing, Friedrich, Schwing, Stefan
• Application Number:
  US14/626,480
• Publication Number:
  US 20160040659A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: F04B 1/02 having two cylinders in V-arrangement F04B1/04
• CPC Class Codes: F04B 11/0058 with piston speed control
• CPC Class Codes: F04B 15/02 the fluids being viscous or non-homogeneous
• 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 19/22 of reciprocating-piston type
• CPC Class Codes: F04B 23/025 the pump being located directly adjacent the reservoir
• CPC Class Codes: F04B 53/10 Valves; Arrangement of valves
• CPC Class Codes: F04B 53/14 Pistons, piston-rods or piston-rod connections
• CPC Class Codes: F04B 53/16 Casings; Cylinders; Cylinder liners or heads; Fluid connections
• CPC Class Codes: F04B 7/0023 and having a rotating movement
• CPC Class Codes: F04B 7/0026 and having an oscillating movement
• CPC Class Codes: F04B 7/0053 for reciprocating distribution members
• CPC Class Codes: F04B 7/0069 for a sliding member

Abstract

A pump device for feeding pasty masses includes a piston pump having a cylinder with a piston connected to a pre-fill container via an inlet. The inlet is delimited by an orifice plate closeable with a slide valve. The slide valve includes pivotable base body, a housing and a closure surface facing inside the housing. The closure surface is formed at least partially by a surface of a valve piston movable relative to the base body. The valve piston enters a hollow space formed in base body when a pressure from the pasty masses is applied to valve piston from inside the slide valve housing. The valve piston enters the hollow space compressing a fluid. A cutting ring constructed as an annular piston having a surface facing the hollow space is pressed in a closed position of the inlet slide valve against the orifice plate by pressure from the fluid.

Claims

1. A pump device for feeding pasty masses, comprising:

a piston pump having a cylinder with a piston connected with a pre-fill container via an inlet opening that is delimited by an orifice plate and can be closed with an inlet slide valve, the inlet slide valve comprising;

a pivotable base body, a slide valve housing and a closure surface facing an inside of the slide valve housing, said closure surface formed at least partially by a surface of a valve piston that is movable relative to the base body, wherein the valve piston can enter a closed hollow space formed in the base body when a pressure from the pasty masses is applied to the valve piston from the inside of the slide valve housing,

a fluid which is compressed when the valve piston enters the hollow space, and

a cutting ring constructed as an annular piston and having a surface facing the hollow space, said cutting ring being pressed in a closed position of the inlet slide valve against the orifice plate by pressure from the fluid.

2. The pump device of claim 1, wherein the cutting ring is constructed with a U-shaped annular cross-section, and wherein the cutting ring is slidingly sealed with an outer inside diameter against the base body and with an inner inside diameter against the valve piston.

3. The pump device of claim 1, wherein the valve piston has on a side facing the fluid a substantially cylindrical shaft which is slidingly supported in a cylindrical bore of the base body and which, in conjunction with an envelope of the piston, forms a guide that secures the valve piston against canting.

4. The pump device of claim 3, wherein the shaft of the valve piston sealingly extends through the base body and is axially movable therein.

5. The pump device of claim 1, wherein the inlet slide valve comprises a pre-biased spring element which operates on the valve piston in an identical direction as the pressure from the pasty masses.

6. The pump device of claim 5, wherein the spring element is formed by one or more disc springs.

7. The pump device of claim 5, wherein the spring element is tensioned by introducing the fluid into the hollow space, thereby moving the valve piston against an effective direction of the pressure from the pasty masses and securing the hollow space with the fluid against fluid leakage by a check valve or a stopper.

8. The pump device of claim 5, wherein the spring element is supported on the cutting ring.

9. The pump device of claim 1, wherein the inlet slide valve is a pivoting flat slide valve having a pivot shaft.

10. The pump device of claim 9, wherein the base body is partially guided in a guide groove, wherein the pressure from the pasty masses residing inside the cylinder applies a hydrostatic force on the closed pivoting flat slide valve, and wherein the hydrostatic force is partially taken up by a pulling force of the pivot shaft supporting the inlet slide valve and partially by a force with which the base body is supported in the guide groove.

11. The pump device of claim 9, wherein a connection of the base body with the pivot shaft allows a small pendulum motion about an axis extending essentially horizontally and perpendicular to a pivot axis.