A thick stock valve having a first through-opening, having a second through-opening and having a valve member associated with both through-openings. The valve member is mounted so as to be able to pivot about a pivot axis, wherein the valve member has a sealing face that is curved concentrically with the pivot axis. In a first state, the valve member releases the first through-opening and closes the second through-opening. In a second state, the valve member releases the second through-opening and closes the first through-opening. The valve member comprises a sealing part and a pivot part, wherein the pivot part is mounted so as to be able to rotate in the pivot axis and wherein the sealing part is connected to the pivot part via a connection structure.

A pump system/method configured to provide substantially constant flow of concrete, cement, or other material is disclosed. The system integrates a trapezoidal cutting ring and spectacle plate in conjunction with lofted transitional interfaces to the mechanical pump cylinder rams and output ejection port to ensure that pressurized discharge concrete material is not allowed to be relaxed nor backflow into the material sourcing hopper. The trapezoidal cutting ring is configured to completely seal off the trapezoidal spectacle ports as it smoothly transitions between the mechanical pump input ports during cycle changes thus generating a more uniform output flow of concrete while eliminating hopper backflow and hydraulic fluid shock. A control system is configured to coordinate operation of the hydraulic pump cylinder rams and cutting ring to ensure that output ejection port pressure and material flow is maintained at a relatively constant level throughout all portions of the pumping cycle.

A pump system/method configured to provide substantially constant flow of concrete, cement, or other material is disclosed. The system integrates a trapezoidal cutting ring and spectacle plate in conjunction with lofted transitional interfaces to the mechanical pump cylinder rams and output ejection port to ensure that pressurized discharge concrete material is not allowed to be relaxed nor backflow into the material sourcing hopper. The trapezoidal cutting ring is configured to completely seal off the trapezoidal spectacle ports as it smoothly transitions between the mechanical pump input ports during cycle changes thus generating a more uniform output flow of concrete while eliminating hopper backflow and hydraulic fluid shock. A control system is configured to coordinate operation of the hydraulic pump cylinder rams and cutting ring to ensure that output ejection port pressure and material flow is maintained at a relatively constant level throughout all portions of the pumping cycle.

A pump system/method configured to provide substantially constant flow of concrete, cement, or other material is disclosed. The system integrates a trapezoidal cutting ring and spectacle plate in conjunction with lofted transitional interfaces to the hydraulic pump cylinder rams and output ejection port to ensure that pressurized discharge concrete material is not allowed to be relaxed nor backflow into the material sourcing hopper. The trapezoidal cutting ring is configured to completely seal off the trapezoidal spectacle ports as it smoothly transitions between the hydraulic pump input ports during cycle changes thus generating a more uniform output flow of concrete while eliminating hopper backflow and hydraulic fluid shock. A control system is configured to coordinate operation of the hydraulic pump cylinder rams and cutting ring to ensure that output ejection port pressure and material flow is maintained at a relatively constant level throughout all portions of the pumping cycle.

A valve for thick matter and method for actuating a valve for thick matter, wherein, in a first switching operation, a valve element is switched between a first switching state (A) and a second switching state (B) by a first volume of hydraulic fluid being supplied to a control cylinder, and, in a second switching operation, the valve element is switched between the second switching state (B) and a third switching state (C) by a second volume of hydraulic fluid being supplied to a control cylinder. The first and second volumes of hydraulic fluid are supplied to the control cylinder by displacement of a metering piston of a metering cylinder from a first end position to a second end position.

The invention relates to, inter alia, a thick matter conveying system (10) comprising a thick matter pump (16) for conveying a thick matter, comprising a double-piston-type core pump (15) which has a pump frequency; an S tube (24) which can be switched by the pump frequency; and a thick matter distributing mast (18) for distributing the thick matter to be conveyed, wherein the thick matter distributing mast (18) has at least two mast arms (41); a substructure (30) on which the thick matter distributing mast (18) and the thick matter pump (16) are arranged, said substructure (30) comprising a support structure (31) for supporting the substructure (30) by means of at least one horizontally and/or vertically movable support leg (32); a sensor unit (11) for sequentially detecting at least one piece of operating information at at least one first and second point in time; and a processing unit (12) which is designed to determine a stability parameter of the thick matter conveying system (10) on the basis of the at least one piece of operating information detected at the first point in time, the at least one piece of operating information detected at the second point in time, and the pump frequency.

A low-force, non-displacement, micro/miniature valve and/or pump assembly is provided. A tube component having a first side port coupled to an inlet portion and a second side port coupled to an outlet portion can be selectively moved to alternatively couple the side ports to a first or second piston pump chamber. First and second pistons can be actuated after positioning the tube component to either draw in fluid or push out fluid from either the first or second piston pump chambers during each actuation of the pistons. The fluid can be drawn in from a reservoir and can be expelled to a patient for providing a dose of the fluid to the patient.

Disclosed is, inter alia, a thick matter distributor mast (18) for distributing a thick matter to be conveyed by means of a thick matter pump (16), having a slewing gear (19) which can be rotated around a vertical axis at a maximum rotating speed; a mast assembly (40) having at least a first mast arm (41) and a second mast arm (42), wherein the first mast arm (41) is connected to the slewing gear (19) at a proximal end of the mast assembly (40), and wherein the mast arms (41, 42) each have a maximum operating range; a conveying line (17) which extends across the mast assembly (40) and comprises a proximal end, which is connectable to an outlet (28) of a thick matter pump, and a distal end, wherein the distal end of the conveying line (17) transitions to an end hose (45) at a distal end of the mast assembly (40); a receiver unit (11) for receiving at least one item of operational information; a processing unit (12) for determining a currently permissible operating range of the first mast arm (41) and the second mast arm (42) respectively and/or for determining a currently permissible slewing gear speed, each depending on the at least one received item of operational information; and a control unit (13) for limiting the operating range of the corresponding mast arm (41, 42) to the respective currently permissible operating range if one of the determined currently permissible operating ranges of the first mast arm (41) and the second mast arm (42) is smaller than or equal to the respective maximum operating range, and/or to limit the rotating speed of the slewing gear (19) if the determined currently permissible rotating speed is less than or equal to the maximum rotating speed.

A pump system/method configured to provide substantially constant flow of concrete, cement, or other material is disclosed. The system integrates a trapezoidal cutting ring and spectacle plate in conjunction with lofted transitional interfaces to the mechanical pump cylinder rams and output ejection port to ensure that pressurized discharge concrete material is not allowed to be relaxed nor backflow into the material sourcing hopper. The trapezoidal cutting ring is configured to completely seal off the trapezoidal spectacle ports as it smoothly transitions between the mechanical pump input ports during cycle changes thus generating a more uniform output flow of concrete while eliminating hopper backflow and hydraulic fluid shock. A control system is configured to coordinate operation of the hydraulic pump cylinder rams and cutting ring to ensure that output ejection port pressure and material flow is maintained at a relatively constant level throughout all portions of the pumping cycle.

A pump system/method configured to provide substantially constant flow of concrete, cement, or other material is disclosed. The system integrates a trapezoidal cutting ring and spectacle plate in conjunction with lofted transitional interfaces to the hydraulic pump cylinder rams and output ejection port to ensure that pressurized discharge concrete material is not allowed to be relaxed nor backflow into the material sourcing hopper. The trapezoidal cutting ring is configured to completely seal off the trapezoidal spectacle ports as it smoothly transitions between the hydraulic pump input ports during cycle changes thus generating a more uniform output flow of concrete while eliminating hopper backflow and hydraulic fluid shock. A control system is configured to coordinate operation of the hydraulic pump cylinder rams and cutting ring to ensure that output ejection port pressure and material flow is maintained at a relatively constant level throughout all portions of the pumping cycle.