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Match Document Document Title
7581935 Device and method for controlling a thick matter pump  
The invention relates to a device and a method for controlling a two-cylinder thick matter pump comprising delivery pistons that are actuated in a push-pull manner by means of a hydraulic...
7513758 Sealing rings for abrasive slurry pumps  
There are a number of applications today where the pumping of abrasive slurries is necessary. The pumping mechanisms, though, can be complex, employing multiple transfer cylinders and movable...
7462020 Concrete pump with pivotable hopper asssembly  
A concrete pump with a pivoting valve and hopper assembly is provided with a novel wear plate and wear ring. The wear plate is mounted on the frame of the pump and remains mounted on the frame as...
7407022 Apparatus for pumping drill cuttings and dual cylinder positive displacement pump for moving drill cuttings and method of use  
A dual cylinder positive displacement pump is used to move drill cuttings. The pump may include one or more of a self-sealing wear ring member/wear plate member interface, stainless steel pumping...
7131820 Method for controlling a thick matter pump  
A method for controlling a thick matter pump comprising two delivery cylinders ( 10 ) emerging, via two openings ( 12 ), into a material reservoir ( 14 ), associated with two delivery pistons ( 26...
6821097 Concrete pump with S-tube valve assembly with wear ring-spring-retainer ring construction  
A concrete pump includes a hopper having a plate with a pair of openings and an S-tube valve assembly which is movable between the two openings. The valve assembly includes an S-tube which is...
6450779 Two-cylinder thick matter pump  
A two-cylinder thick-matter pump for continuous delivery of thick matter is characterized in that a reversing valve ( 5 ) has a diverter housing ( 8, 8 ′) with at least four openings (a-b), the...
6447259 Pressure energy recovery device  
An energy recovery device includes at least one cylinder, a piston slidable in the cylinder, a first valve for selectively connecting one end of the cylinder to waste liquid at a first relatively...
6443718 Shuttle valve for concrete pump  
A shuttle valve for use in a pumping apparatus for pumping concrete or the like. The valve uses belleville springs to hold a wear ring against the concrete hopper, thereby creating a seal.
6338615 Pipe switch for two-cylinder thick-material pump  
The present invention relates to a pipe switch for a dual-cylinder thick-liquid pump, wherein said system comprises a pivoting pivot pipe ( 36 ) located in the front of a glasses-like wear plate (...
6126410 Head cover assembly for reciprocating compressor  
A head cover assembly for a compressor according to the present invention includes a valve plate mounted onto the compressor cylinder having a first side, a second side, a first bore, and a second...
6053711 Pump for pressurizing control system  
Pump to supply fluid to at least two circuits in a control system for a production well. Each of the circuits is maintained at different pressures. The pump provides fluid to a plurality of poppets...
5993181 Process and device for feeding concrete or other thick materials  
A apparatus for feeding concrete and other thick materials from a container into a feeding pipe by two feeding cylinders which are alternately connectable by a switching device to the container or...
5865606 Slurry supplying mechanism  
A mechanism for pumping slurry includes a housing for receiving the slurry and two cylinders secured to the housing for drawing the slurry into and out of cylinders. A pipe is pivotally secured to...
5857490 Structure of a pump valve for concrete mixture pumping trucks  
A pump valve assembly includes a pair of pistons containing cylinder bores opening to a front wall for conveying a concrete mixture from a feed chamber to a delivery tube. A pivotal S-bend tube...
5653876 High pressure pump for fine liquid metering  
In order to reduce the overall size of serial pump arrangements, several block-disk-like building elements are used. These building elements are made of a non-metallic material and lie against each...
5482448 Positive displacement pump with concentrically arranged reciprocating-rotating pistons  
A valveless positive displacement pump having pistons that undergo both rotating and reciprocating motion. The assembly comprises a radially outer, ported first cylinder with an axially outer,...
5380174 Pump for thick matter having delivery cylinders, in particular a two-cylinder concrete pump  
In a pump for thick matter with delivery cylinders (1, 2), in particular a two-cylinder concrete pump, which in order to control the flow of thick matter, incorporates a distributing regulator (11)...
5304041 Method and device for dosing pumping  
A method of pumping a product by means of a dosing pump unit entails that two individually driven pump chambers, which are connected with a common outlet, are controlled in such a way that the...
5302094 Tube switch for a double-cylinder sludge pump  
A tube switch for a double-cylinder sludge pump is provided including a swing pipe, a wearing ring and an elastic member. The swing pipe is adapted to swivel in front of a center plate and includes...
5190449 Material feed tank for sludge pumps  
A material-feeding container is disclosed for two-cylinder thick-matter pumps having feeding cylinders that open into the container. Inside the container is arranged a switchable guide-tube linked...
5141414 Piston pump for easily damaged products  
An improved pumping device for delicate or easily damaged products is provided with a hopper, or other system for holding the products, and at least one, and preferably two, synchronized piston...
5061158 Multi-cylinder piston pump  
A multi-cylinder piston pump of rotary slide valve design for conveying free flowing materials, in particular concrete, comprises a rotary slide valve (33, 36) connected to the piston (48, 49) and...
4979884 Multi-cylinder pump for heavy flowable materials  
A two-cylinder pump for heavy flowable material comprising a pump body with a deck surface, a pair of cylinder bores opening at the deck surface, and a piston reciprocating in each cylinder bore in...
RE32719 Multi-way valves for pumps for conveying heavy flowable materials  
The valve has a shutter mechanism which is movable within a housing and is provided at one end with at least one inlet which is movable across one or more housing openings and at the opposite end...
4681022 Two-cylinder viscous liquid pump with pipe switch  
In a two-cylinder viscous liquid pump with a pipe switch, which by means of a swing pipe alternately connects one of the pump cylinders with the conveyor pipe and releases the other pump cylinder,...
4661049 Metering pump  
A metering pump including adjacent valve and pump chambers, the valve chamber having inlet and outlet connections and a valve plug angularly shiftable in the valve chamber to communicate said...
4653990 Positive double-piston displacement pump conveying pasteous material  
In positive displacement pumps using double pistons for the alternating supply of pasteous material from two supply cylinders through a pivotable feed tube arranged in a feed chamber spaced at a...
4614483 Device for sealing a concrete pump  
The invention relates to a device for sealing in the zone of contact between the mouths of alternately charging and discharging delivery cylinders of a concrete pump and a swinging pipe that is...
4613290 Evacuated pumping system  
A pumping system for various flowables utilizes a dual alternating piston pump in communication with a tank hopper having flowable material inlet and delivery lines and an internal oscillating...
4580954 Oscillating-deflector pump  
A slurry pump having a pair of cylinders aligned one on either side of a centrally-disposed oscillating-deflector element; each cylinder has a housing in which are defined co-axial, registering...
4569642 Slurry pump  
A slurry pump has a hopper containing slurry. A pumping cylinder containing a piston communicates with the hopper through the hopper wall. A delivery tube is swung into and out of register with the...
4563135 Pump for concrete or the like  
A concrete pump comprises a water rinsing box, a valve housing and a pair of concrete pump cylinders there-between. The rinsing box and the valve housing are welded at opposite ends of rigid...
4556370 Twin cylinder pumps, more specially for concrete  
A twin cylinder pump for viscous materials such as concrete, having a guide for a cutting ring producing a sealing effect on the cylinder and a seat for supporting a loaded spring ring of elastic...
4502851 Pivotal discharge apparatus  
An apparatus for oscillating a distribution duct between two outlets of adjacent pump cylinders and a common discharge pipe. A portion of the apparatus pivots with the discharge pipe and cooperates...
4486156 Concrete pump with buttressed distribution pipe  
A pump assembly has a hopper adapted to hold a wet concrete mass and having a front wall formed with a front port centered on a front axis perpendicular to the front wall at the front port and a...
4466782 Valve unit for use in concrete pumps  
A fluid passage change over valve unit for use in concrete pumps wherein a passage change over valve member located within a hopper is connected at its outlet port to a delivery line for pivoting...
4431386 Concrete-pump assembly  
A pump assembly for concrete comprises a hopper adapted to hold the mass and having a front wall formed with a front port centered on a front axis perpendicular to the front wall at the front port...
4382752 Twin-cylinder pump, in particular for pumping thick liquids  
In pumps for viscous substances, particularly pumps for concrete, with two feed cylinders (2) opening out into a hopper (1), which cylinders (2) alternately draw the material to be forwarded from...
4373875 Viscous material pump, in particular for the conveyance of concrete  
A viscous material pump, in particular for the conveyance of concrete through a housing (3) of a switch tube (2) has a swivel body (26) fastened on an axially supported pivot shaft (44). The swivel...
4343598 Viscous material pump, particularly for concrete  
A valve structure for a viscous material pump having a material reservoir, a pair of alternately operable material conveying cylinders, discharge conduit means, and a valve control means coupled to...
4198193 Automatic wear compensation apparatus for concrete pumping hopper apparatus  
A pivotal pipe valve unit for concrete supply hoppers having a pair of concrete pumps of the piston-cylinder type which includes a shuttle valve pipe mounted within the hopper for pivoting about a...
4191513 Pump for conveying cement  
A pump for conveying cement comprises two pump cylinders and reciprocating pistons, an input container, a multi-limb oscillating shutter valve arranged in front of the pump cylinders and below the...
4178142 Double-cylinder pump especially for conveying cement  
In a double-cylinder pump for conveying cement, a distribution pipe is pivotally driven into alignment with each of the cylinders in turn. A wearing ring, which provides a seal between the end of...
4173436 Pivotable pipe slide for use in a two cylinder concrete pump  
A pivotable pipe slide for use in a two cylinder concrete pump includes a swing pipe which is pivotably moved in a reciprocal fashion between the two discharge openings of the pump cylinders in...
4145166 Displacement pump  
Disclosed is a displacement pump especially suited for use in very small well bores. The pump includes a piston working in a cylinder, driven by a rotating cam shaft having closed loop cams for...
4131394 Method for transport of manure and a device according to the method  
A method and a device for transport of manure under pressure through a pipe, including a mainly cylindrical housing with a piston member having a circle segment cross-section, said piston member...
3580696 CONCRETE PUMP ASSEMBLY  
Concrete pump assembly regulated by control flap valves with two pump cylinders and a common outlet opening. On two sides of the outlet opening in a control housing is a pair of control flap...
3510235 PISTON PUMP  
0093794 Title is not available  
Matches 1 - 50 out of 51 1 2 >