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Class Information
Number: 417/516
Name: Pumps > Expansible chamber type > Mechanically actuated distributor > Plural pumping chambers > Common element forms inlet or discharge distributor for plural chambers
Description: Apparatus in which the valve element comprises a single unitarily movable member which controls either (1) the inlet of pump fluid to two or more pump chambers or (2) the discharge or pump fluid from two or more pump chambers.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7625190 |
Crossover switching valve |
Dec. 1, 2009 |
| 7462020 |
Concrete pump with pivotable hopper asssembly |
Dec. 9, 2008 |
| 7131820 |
Method for controlling a thick matter pump |
Nov. 7, 2006 |
| 6793467 |
Thick matter pump |
Sep. 21, 2004 |
| 6443718 |
Shuttle valve for concrete pump |
Sep. 3, 2002 |
| 6305916 |
Concrete pump with pivotable hopper assembly |
Oct. 23, 2001 |
| 6220834 |
Support pipe for concrete pump with pivoting valve |
Apr. 24, 2001 |
| 5733105 |
Axial cam driven valve arrangement for an axial cam driven parallel piston pump system |
Mar. 31, 1998 |
| 5486098 |
Swash plate type variable displacement compressor |
Jan. 23, 1996 |
| 5429482 |
Reciprocatory piston type compressor |
Jul. 4, 1995 |
| 5368449 |
Refrigerant gas guiding mechanism for piston type compressor |
Nov. 29, 1994 |
| 5316453 |
Slurry pump with discharge cylinders, especially two-cylinder concrete pump |
May. 31, 1994 |
| 5180294 |
Concrete pump having pressurized seal for swing tube |
Jan. 19, 1993 |
| 5141414 |
Piston pump for easily damaged products |
Aug. 25, 1992 |
| 5026255 |
Pulseless pump apparatus having pressure crossover detector and control means |
Jun. 25, 1991 |
| 4869653 |
Compact twin piston pump |
Sep. 26, 1989 |
| 4793779 |
Rotating piston compressor having an axially adjustable rotary sleeve valve |
Dec. 27, 1988 |
| 4681022 |
Two-cylinder viscous liquid pump with pipe switch |
Jul. 21, 1987 |
| 4569642 |
Slurry pump |
Feb. 11, 1986 |
| 4541394 |
Fuel injection pump |
Sep. 17, 1985 |
| 4502851 |
Pivotal discharge apparatus |
Mar. 5, 1985 |
| 4497299 |
Plunger type fuel injection pump |
Feb. 5, 1985 |
| 4437817 |
Two cylinder viscous material pump |
Mar. 20, 1984 |
| 4382752 |
Twin-cylinder pump, in particular for pumping thick liquids |
May. 10, 1983 |
| 4337017 |
Hydraulic sleeve valve and seal arrangement for piston pump |
Jun. 29, 1982 |
| 4207929 |
Method and apparatus for dispensing measured quantities of material |
Jun. 17, 1980 |
| 4178142 |
Double-cylinder pump especially for conveying cement |
Dec. 11, 1979 |
| 4174788 |
Batching plant for lime concrete |
Nov. 20, 1979 |
| 4173436 |
Pivotable pipe slide for use in a two cylinder concrete pump |
Nov. 6, 1979 |
| 4127360 |
Bumpless pump apparatus adjustable to meet slave system needs |
Nov. 28, 1978 |
| 4102613 |
Concrete pumping machine |
Jul. 25, 1978 |
| 4036564 |
Concrete pumping apparatus |
Jul. 19, 1977 |
| 3982663 |
Method and apparatus for metering thixotropic battery paste |
Sep. 28, 1976 |
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