Did You Know...
...Chester Carlson was a patent agent who tired of having to make multiple copies of patent applications using the only duplication method available at the time: carbon paper. In 1959 he came up with a new copying system and took it to IBM for evaluation. The "experts" at IBM determined potential sales to be only 5,000 units because people wouldn't want to use a bulky machine when they had carbon paper. Carlson's invention was the xerography process, the company founded on the system is Xerox.
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| Number | Title | Issue Date |
| 7625190 | Crossover switching valve The present invention involves several different embodiments related to a crossover switching valve. The crossover switching valve is preferably designed to receive fluid from a reservoir, or other fluid source, and direct the inflow and outflow of the fluid between... | 12/01/2009 |
| 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), symmetrically synchronized relative to said cy... | 11/07/2006 |
| 7104057 | Concrete-mortar transfer system of concrete pump car A concrete transfer system for a concrete pump car has a pair of concrete input tubes mounted in a hopper, first and second drive cylinders operating with the concrete input tubes for inputting and outputting the concrete by pressure pistons each having a driving ro... | 09/12/2006 |
| 7097569 | Restorable sand or pellet pile device A restorable sand or pellet pile is provided for use as an amusement or exercise device. A sand or pellet collection chamber has inclined side walls that converge toward each other in a downward direction and having a bottom surface connected to the side walls. A su... | 08/29/2006 |
| 7048006 | Material feeding container for two-cylinder thick matter pumps The invention relates to a material feeding container for two-cylinder thick matter pumps. The material feeding container (24) has a material supply opening (30) oriented upward, two feed cylinder openings (34) arranged in the front wall (36 | 05/23/2006 |
| 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.... | 09/03/2002 |
| 6305916 | Concrete pump with pivotable hopper assembly The hopper of a concrete pump is pivotally mounted on the frame of the pump so that the hopper can be swung away from the pumping cylinders in order to clean the S-valve in the hopper. O-rings on the frame surround the pumping cylinders and sealingly enga... | 10/23/2001 |
| 6220834 | Support pipe for concrete pump with pivoting valve The invention relates to a sliding device for two-cylinder pumps for liquids, especially designed for concrete pumps. The sliding device (20) has a pivot pipe (16) which is bent and has substantially a C-shape. The pivot pipe is fixedly connected, at its ... | 04/24/2001 |
| 5733105 | Axial cam driven valve arrangement for an axial cam driven parallel piston pump system A reciprocating piston pump provides pulseless delivery of liquid. It is suitable for use in compact environments or for the delivery of small amounts of liquid, as in chromatographic analysis devices. The pump includes two pistons with pumping chambers t... | 03/31/1998 |
| 5486098 | Swash plate type variable displacement compressor A swash plate type variable displacement compressor comprises cylinder bores, pistons, a suction chamber and a discharge chamber. A suction valve introduces a low pressure gas into a working chamber in each cylinder bore. A discharge valve introduces a hi... | 01/23/1996 |
| 5429482 | Reciprocatory piston type compressor A reciprocatory piston type compressor having a compressor body in which a low pressure suction chamber for the refrigerant before compression, a discharge chamber for the refrigerant after compression, and a plurality of axial cylinder bores receiving a ... | 07/04/1995 |
| 5368449 | Refrigerant gas guiding mechanism for piston type compressor A plurality of pistons are provided in the associated cylinder bores arranged around the rotary shaft. Each piston reciprocates in relation to the rotation of the rotary shaft to execute suction, compression and discharge of the refrigerant gas. A valve c... | 11/29/1994 |
| 5316453 | Slurry pump with discharge cylinders, especially two-cylinder concrete pump A slurry pump for mixing concrete includes a charge funnel, a pair of discharge cylinders, and a discharge line operable with each other to form a slurry flow control. A control valve has an exit port connected with the discharge line and an entrance port... | 05/31/1994 |
| 5180294 | Concrete pump having pressurized seal for swing tube A pressure sealing assembly for a swing tube-type concrete pump. The assembly provides a fluid-tight seal between the intake end of the swing tube and the ports of the pumping cylinders. Pressure faces are formed in the bearing assembly where the discharg... | 01/19/1993 |
| 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 pumps positioned proximate to the bottom of the hopper. The p... | 08/25/1992 |
| 5026255 | Pulseless pump apparatus having pressure crossover detector and control means A multi-cylinder pulseless pump mechanism is provided which incorporates a plurality of positive displacement pumps having their respective outlets coupled for sequentially delivering a continuous pulseless supply of fluid to an outlet line. To achieve pu... | 06/25/1991 |
| 4869653 | Compact twin piston pump A compact, relatively low cost twin piston pump (20) especially adapted for the pumping of foods (e.g. juices, puddings or particulates such as stews and chilies) is provided which includes quick detach yoke and clevis assemblies (108, 124, 110, 126) conn... | 09/26/1989 |
| 4793779 | Rotating piston compressor having an axially adjustable rotary sleeve valve A rotating piston compressor includes a cylinder having inlet and outlet openings formed therein, a piston rotating in a given direction in the cylinder, a shaft supporting the piston and rotating in the given direction, a casing connected to the cylinder... | 12/27/1988 |
| 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, and which swing pipe is moved along its path of travel by ... | 07/21/1987 |
| 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 cylinder. Slurry is drawn into the cylinder by the piston... | 02/11/1986 |
| 4541394 | Fuel injection pump A fuel injection pump of the radial plunger, spill port type includes electromagnetic means for opening and closing the spill port to control the pressurization of fuel for injection of fuel to the individual engine cylinders; a single solenoid assembly c... | 09/17/1985 |
| 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 with a stationary housing to relieve thrust loads imparte... | 03/05/1985 |
| 4497299 | Plunger type fuel injection pump A multi-plunger fuel injection pump consisting of a number of reciprocable fuel pumping plungers to which is distributed fuel by a fuel distributor plunger, all of the plungers being actuated by a common camshaft, the number of distributor plungers being ... | 02/05/1985 |
| 4437817 | Two cylinder viscous material pump A two-cylinder viscous material pump has parallel axis, conveying cylinders mounted in a frame work. The conveying cylinders alternately suck in the viscous material through an inlet valve housing from a reservoir and press it out, in the following stroke... | 03/20/1984 |
| 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 the hopper (1) and press it via a swingable S-shaped tube (... | 05/10/1983 |
| 4337017 | Hydraulic sleeve valve and seal arrangement for piston pump To prevent leakage of wet concrete passing from a reciprocating pump to a delivery conduit and to prevent clogging of the seal and valve means interposed between the pump outlets and the mouth of the delivery conduit, a floating sleeve is biased by pump s... | 06/29/1982 |
| 4207929 | Method and apparatus for dispensing measured quantities of material A material metering device and method for repetitively charging consistently accurate quantity charges of a lubricant retaining and wicking material to lubricant reservoirs of dynamoelectric machine bearings. A metering head is movably supported on a base... | 06/17/1980 |
| 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 the pipe and the cylinders, is mounted so as to be movable ... | 12/11/1979 |
| 4174788 | Batching plant for lime concrete A batching pump for lime concrete comprising a base, a longitudinal displacement feeder attached to said base, at least one evacuator conduit attached to said base, at least one cylinder for receiving at one end thereof lime concrete and pumping lime conc... | 11/20/1979 |
| 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 such a manner that it is pressed against the discharge openin... | 11/06/1979 |
| 4127360 | Bumpless pump apparatus adjustable to meet slave system needs Pumping apparatus which incorporates connected piston type positive displacement, slip free pumps is disclosed. They provide pumped outputs at a common displacement rate. They run out of phase to one another so that while one is pumping, the other is able... | 11/28/1978 |
| 4102613 | Concrete pumping machine A pump for concrete or other moist flowable material containing aggregate, including a hopper, a pair of alternately stroking pump assemblies below the hopper for forcing concrete via a junction valve into a common output line, and a loading system for al... | 07/25/1978 |
| 4036564 | Concrete pumping apparatus A concrete hopper has a plurality of arcuate channels in its bottom portion, preferably lined with a resilient material, such as rubber. The hopper includes a discharge end with discharge outlets formed therein in communication with the channels. A slidin... | 07/19/1977 |
| 3982663 | Method and apparatus for metering thixotropic battery paste Thixotropic battery paste is metered at a substantially predetermined volumetric flow rate onto a battery grid with the aid of a positive displacement pump means and alternate operation of a pair of cylinder and ram metering devices which are synchronized... | 09/28/1976 |
