| Patents for F04B 13 - Pumps specially modified to deliver fixed or variable measured quantities (2,234) |
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| 05/02/1978 | US4087209 Displacement slurry pump |
| 04/11/1978 | US4084246 Pulse generator |
| 03/28/1978 | US4080874 Drive for a pair of metering pumps |
| 02/28/1978 | US4076465 Volumetric proportioning diluter |
| 01/17/1978 | US4068974 Fountain toothbrush having bristle carrier easily producible by injection molding |
| 11/29/1977 | US4060351 Controlled inlet valves for metering pumps |
| 11/01/1977 | US4056258 Actuating device with electronic control for injectors of liquid mixers |
| 10/04/1977 | US4051814 High pressure washer |
| 09/06/1977 | US4046288 Plural chamber dispenser |
| 09/06/1977 | US4046287 Automatic metering and dispensing system |
| 08/02/1977 | US4038983 Fluid infusion pump |
| 06/28/1977 | US4032040 Method and control system for batching plural substances and pump system |
| 06/21/1977 | US4030860 Variable proportional metering apparatus |
| 06/14/1977 | US4029236 Two product dispenser with cooperating telescoping cylinders |
| 06/07/1977 | US4028018 Non-pulsing apparatus |
| 05/31/1977 | US4026439 Precision fluid dispensing and mixing system |
| 05/03/1977 | US4021153 Liquid metering pumps |
| 04/19/1977 | US4018545 Mix blending pump |
| 01/25/1977 | US4004717 Pressure fed liquid dispenser |
| 01/18/1977 | US4003679 High pressure pump with metering |
| 10/12/1976 | US3985019 Liquid chromatography system with solvent proportioning |
| 09/21/1976 | US3981632 Metering pump |
| 09/14/1976 | US3980231 Proportioning sprayer device |
| 08/24/1976 | US3976400 Gradient pump apparatus |
| 08/17/1976 | US3974714 Pump driving mechanism with adjustable stroke |
| 07/13/1976 | US3969046 Metering pump system |
| 07/06/1976 | US3967634 Flow ratio control system |
| 07/06/1976 | US3967612 Lubricating oil pump for use in an internal combustion engine |
| 06/29/1976 | US3965758 Controllable pumps |
| 06/15/1976 | US3963384 Erosion-preventing device for a lift-and-force pump |
| 03/23/1976 | US3945772 Pumps for transferring small quantities of dosed liquids |
| 02/17/1976 | US3938425 Pump stroke adjustment device |
| 02/10/1976 | US3937241 Device for injecting an adjuvant into a liquid |
| 01/06/1976 | US3930756 Metering pulse pump |