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Class Information
Number: 417/517
Name: Pumps > Expansible chamber type > Mechanically actuated distributor > Plural pumping chambers > Common element forms inlet or discharge distributor for plural chambers > Element forms both inlet and discharge distributor
Description: Apparatus in which the unitarily movable valve element controls both the inlet and discharge of pump fluid to and from two or more pump chambers.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7462020 |
Concrete pump with pivotable hopper asssembly |
Dec. 9, 2008 |
| 7318706 |
Valving for multi-stage vacuum pumps |
Jan. 15, 2008 |
| 7131820 |
Method for controlling a thick matter pump |
Nov. 7, 2006 |
| 7048006 |
Material feeding container for two-cylinder thick matter pumps |
May. 23, 2006 |
| 6857861 |
Ring for concrete pump |
Feb. 22, 2005 |
| 6821097 |
Concrete pump with S-tube valve assembly with wear ring-spring-retainer ring construction |
Nov. 23, 2004 |
| 6572344 |
Compact pump or motor with internal swash plate |
Jun. 3, 2003 |
| 6568923 |
Fluid suction and discharge apparatus |
May. 27, 2003 |
| 6514569 |
Variable volume positive displacement dispensing system and method |
Feb. 4, 2003 |
| 6494687 |
Metering device for viscous liquids with a plurality of selectively engaged metering pumps, metering channels, supply channels, and bypass channels for flush cleaning |
Dec. 17, 2002 |
| 6443718 |
Shuttle valve for concrete pump |
Sep. 3, 2002 |
| 6338615 |
Pipe switch for two-cylinder thick-material pump |
Jan. 15, 2002 |
| 6206662 |
Two-cylinder slurry pump |
Mar. 27, 2001 |
| 6179587 |
Dispensing valve mounted on dispensing pumps |
Jan. 30, 2001 |
| 5718570 |
Rotary control valve for a piston pump |
Feb. 17, 1998 |
| 5458470 |
Pumping apparatus |
Oct. 17, 1995 |
| 5431549 |
Bidirectional aspetic volume filler |
Jul. 11, 1995 |
| 5304041 |
Method and device for dosing pumping |
Apr. 19, 1994 |
| 5302094 |
Tube switch for a double-cylinder sludge pump |
Apr. 12, 1994 |
| 5277338 |
Fluid metering apparatus |
Jan. 11, 1994 |
| 5267839 |
Reciprocatory piston type compressor with a rotary valve |
Dec. 7, 1993 |
| 5190449 |
Material feed tank for sludge pumps |
Mar. 2, 1993 |
| 5180294 |
Concrete pump having pressurized seal for swing tube |
Jan. 19, 1993 |
| 5071326 |
Double piston portioning apparatus |
Dec. 10, 1991 |
| 5037275 |
Pipe junction switch for two-cylinder thick-material pump |
Aug. 6, 1991 |
| 4924898 |
Vacuum assisted material mover |
May. 15, 1990 |
| 4893992 |
Two-cylinder thick-material pump |
Jan. 16, 1990 |
| 4854838 |
Hydraulic pump gate apparatus |
Aug. 8, 1989 |
| 4790728 |
Dual-rigid-hollow-stem actuators in opposite-phase slurry pump drive having variable pumping speed and force |
Dec. 13, 1988 |
| 4767031 |
Dosing and filling of fluid or pasty masses, in particular nutrient materials which are to be kept free of contaminants, such as milk, yogurt, pudding, dessert or the like into containers |
Aug. 30, 1988 |
| RE32719 |
Multi-way valves for pumps for conveying heavy flowable materials |
Jul. 26, 1988 |
| RE32657 |
Two-cylinder pump for heavy flowable materials, such as concrete |
Apr. 26, 1988 |
| 4671429 |
Method and apparatus for volumetric dosing viscous products |
Jun. 9, 1987 |
| 4661049 |
Metering pump |
Apr. 28, 1987 |
| 4659293 |
Pumping system with air conveyance and method |
Apr. 21, 1987 |
| 4653990 |
Positive double-piston displacement pump conveying pasteous material |
Mar. 31, 1987 |
| 4614483 |
Device for sealing a concrete pump |
Sep. 30, 1986 |
| 4613290 |
Evacuated pumping system |
Sep. 23, 1986 |
| 4599049 |
High pressure meter pump |
Jul. 8, 1986 |
| 4580954 |
Oscillating-deflector pump |
Apr. 8, 1986 |
| 4563135 |
Pump for concrete or the like |
Jan. 7, 1986 |
| 4556370 |
Twin cylinder pumps, more specially for concrete |
Dec. 3, 1985 |
| 4554901 |
Fluid distributing apparatus |
Nov. 26, 1985 |
| 4533300 |
High pressure pumping apparatus for semi-fluid material |
Aug. 6, 1985 |
| 4531494 |
Distributor fuel injection pump having a nutator pump subassembly |
Jul. 30, 1985 |
| 4486156 |
Concrete pump with buttressed distribution pipe |
Dec. 4, 1984 |
| 4472118 |
Multi-way valves for pumps for conveying heavy flowable materials |
Sep. 18, 1984 |
| 4466782 |
Valve unit for use in concrete pumps |
Aug. 21, 1984 |
| 4466335 |
Sealing for variable volume device |
Aug. 21, 1984 |
| 4465441 |
Two-cylinder pump for heavy flowable materials, such as concrete |
Aug. 14, 1984 |
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