Ferdinandus A Pieters

US Patent:

57022348, Dec 30, 1997

Filed:

Dec 1, 1995

Appl. No.:

8/566300

Inventors:

Ferdinandus A. Pieters - Camas WA

Assignee:

Micropump, Inc. - Vancouver WA

International Classification:

F04B 1700
F04C 218
F04C 1500

US Classification:

417 53

Abstract:

A gear pump is disclosed having an integrated gear cavity and bearing receptacle that includes a fluid path for lubricating the bearings. The preferred embodiment includes a helical gear pump having a manifold with inlet and outlet ports. The integrated gear cavity and bearing receptacle are located in a one piece molded end cap. The bearing receptacle receives a coupled bearing assembly. Together, the coupled bearing assembly and the bearing receptacle define a supply path outside the bearings along the bearing receptacle and a return path through the bearings so that fluid can pass by, and lubricate, the bearing-axle interface.

US Patent:

41631641, Jul 31, 1979

Filed:

Oct 11, 1977

Appl. No.:

5/841034

Inventors:

Ferdinandus A. Pieters - Walnut Creek CA

Assignee:

Micropump Corporation - Concord CA

International Classification:

H02K 711

US Classification:

310103

Abstract:

One of two permanent magnets used to drive pumps and the like is split--i. e. , the annular permanent magnet is split into two annular members, one fixed to one of the rotating members, the other freely rotatable independent of the other. The structure provides for recoupling without having to stop the driving magnet when decoupling has occurred. It also provides free travel and/or dynamic damping to alleviate oscillation and sporadic decoupling. The member fixed for rotation is a permanent magnet; the other is preferably a permanent magnet but may also be of a material which is magnetically permeable, in which case damping only is accomplished.

US Patent:

60073128, Dec 28, 1999

Filed:

Jan 13, 1998

Appl. No.:

9/006152

Inventors:

Ferdinandus A. Pieters - Camas WA
Kenneth E. Knodell - Vancouver WA

Assignee:

Micropump, Inc. - Vancouver WA

International Classification:

F04B 1700

US Classification:

417420

Abstract:

An encapsulated magnet assembly has a magnet encapsulated during a two-step molding process. The first step includes molding a first molded section over a magnet assembly. The second step of the process includes molding a second molded section over the magnet and the first molded section in such a manner that the entire magnet is covered by the two molded sections completely. A first parting line is defined between the first and second molded sections along an elongate tapered section of the first molded section at the one end of the assembly. A second parting line is defined between the first and second molded sections at a dovetail on the first molded section. An outwardly tapered surface is provided on the dovetail. The two parting lines define leak-free seams between the two molded sections thereby sealingly encapsulating the magnet within the two molded sections.

US Patent:

41116143, Sep 5, 1978

Filed:

Jan 24, 1977

Appl. No.:

5/761867

Inventors:

Thomas B. Martin - Pleasant Hill CA
Ferdinandus A. Pieters - Walnut Creek CA

Assignee:

Micropump Corporation - Concord CA

International Classification:

F04B 3504
F04B 900

US Classification:

417420

Abstract:

A pump body has a cavity containing gears and parts communicating between the exterior and the cavity as well as two shafts on which the gears revolve. One face of the cavity is closed off by an apertured plate. The drive gear shaft extends through the aperture in the plate and supports the driven magnet. Drive means also extend through the aperture causing the hub of the driven magnet to turn the drive gear. All parts to the motor side of the plate may be standardized, while the pump body and its contents may be specially adapted to the particular ultimate installation of the pump.

US Patent:

44936257, Jan 15, 1985

Filed:

Aug 6, 1982

Appl. No.:

6/405893

Inventors:

Ferdinandus A. Pieters - Concord CA

Assignee:

Micropump Corporation - Concord CA

International Classification:

F04B 1700
F01C 118
F01C 1910
F04C 108

US Classification:

418126

Abstract:

The drive and driven gears of a pump are formed with grooves extending inward from the tips of the teeth to inside the root diameter. Thus each gear is divided into a first portion which serves solely as a drive or driven gear and a second portion which serves the two functions of a conventional pump gear, mainly to perform the pumping function and part of the drive function. Fitting within the grooves of both gears is a suction shoe which also overlies the inlet duct of the pump block and the mesh points of the first portions of the gears plus about two teeth to either side of the mesh point. The shoe separates the large portion of the pump chamber from the inlet duct.

US Patent:

60331933, Mar 7, 2000

Filed:

May 27, 1998

Appl. No.:

9/085122

Inventors:

Ferdinandus A. Pieters - Camas WA
Stephen Michael Burns - Portland OR
Roy D. Hollie - Vancouver WA
James Roberts - Ridgefield WA

Assignee:

Micropump Corporation - Vancouver WA

International Classification:

F04B 1700
F04C 218

US Classification:

417420

Abstract:

A gear pump is disclosed. The gear pump has a pump body with an inlet, a discharge and an interior side to the body. The gear pump also has a cavity plate having a gear cavity formed therein facing and abutting the interior side of the pump body. A drive gear and a driven gear are located within the gear cavity and engage one another. Each gear is rotatably supported on a shaft between the pump body and the cavity plate. A drive magnet assembly is connected to the drive gear shaft. A magnet cup has an interior chamber and a sealing surface which abuts against the interior side of the pump body providing the only required seal of the gear pump. The magnet cup is received over and encapsulates the magnet assembly, the cavity plate and the gears within the interior chamber and compresses the gear cavity against the interior surface of the body without requiring additional sealant to seal the gear cavity and magnet cup interior chamber.

US Patent:

48466417, Jul 11, 1989

Filed:

Jul 19, 1985

Appl. No.:

6/756665

Inventors:

Ferdinandus A. Pieters - Concord CA
Thomas B. Martin - Walnut Creek CA

Assignee:

Micropump Corporation - Concord CA

International Classification:

F04C 218
F04C 1300

US Classification:

418 70

Abstract:

A rotary pump has a block with inlet and outlet ducts and ports. A pump housing forming a pump cavity and accommodating working means of the pump, e. g. , gears, is located on one side of the pump block, whereas drive means such as a magnetic coupling are placed on the other side of the block. In the case of a gear pump, the driving gear is connected to the drive magnet of the coupling through a drive shaft which passes through the axial bore in the block. The drive gear meshes with a driven gear which is mounted on a second shaft, also supported in bushings in the block. One set of ends of the shafts extends outside the pump housing and are inserted into bushings loosely fitted in recesses of a bearing support plate. This plate is attached to the block by removable screws extending through holes in the supporting plate and pump housing. The arrangement described makes it possible to replace worn parts of the pump, such as gears, shafts and bushings in a matter of minutes without the necessity of disconnecting the pump block and any piping or electrical connections to the motor.

US Patent:

41652061, Aug 21, 1979

Filed:

Jun 8, 1977

Appl. No.:

5/804766

Inventors:

Thomas B. Martin - Pleasant Hill CA
Ferdinandus A. Pieters - Walnut Creek CA

Assignee:

Micropump Corporation - Concord CA

International Classification:

F04C 108
F04C 1500
F04B 4902
F04B 3500

US Classification:

417310

Abstract:

A module pump comprises a manifold having intake and outlet connections; a plate to which gears and a "shoe" (which function to define pump chambers for a pair of gears) or, in a pump having three gears two "shoes;" a drive for the gears, which in a preferred embodiment is a magnetic drive; and a barrier between the drive and the plate. Each of the modules is subject to variations in design depending upon end use and hence wide versatility is achieved without great increases in manufacturing cost since only one of the modules need be altered. Use of three gears doubles the capacity of the pump; if three gears are not needed the mounting holes for the third gear may be plugged. A unique bypass is installed in the manifold to permit flow back to the intake when the pressure exceeds an adjustable amount.