John Robert Bernard

20120175442, Jul 12, 2012

Jan 7, 2011

12/986477

RENQIANG XIONG - Newton MA, US
John Michael Bernard - Stoughton MA, US

Microfluidics International Corporation - Newton MA

B02C 23/18
B23P 11/00

241 15, 29428

A compact interaction chamber is used to cause high shear, impact forces, and cavitation to reduce particle size and mix fluids while reducing waste and holdup volume. A first housing made of stainless steel holds an inlet mixing chamber element and an outlet mixing chamber element in a female bore using thermal expansion. The inlet and outlet mixing chamber elements are manufactured so that the diameter of the cooled female bore is slightly smaller than the diameter of the mixing chamber elements. The first housing is heated, expanding the diameter of the female bore enough to allow the inlet and outlet mixing chamber elements to be inserted. After the mixing chamber elements are inserted and aligned within the female bore, the first housing is allowed to cool. Once cooled, the female bore contracts and applies sufficient hoop stress to securely hold the mixing chamber elements during high shear force mixing.

20120263012, Oct 18, 2012

Apr 13, 2011

13/085903

RENQIANG XIONG - Newton MA, US
John Michael Bernard - Stoughton MA, US

Microfluidics International Corporation - Newton MA

B01F 15/02

366134

A mixing assembly includes an inlet, an outlet and a mixing chamber, the inlet is fluidly connected to the outlet through a plurality of micro fluid flow paths in a direction perpendicular from the inlet. The micro fluid flow paths fluidly connect to the perpendicular inlet via a transition portion. The micro fluid flow paths are constructed radially inwardly to a concentration area in the mixing chamber. By directing multiple fluid flows to a concentrated area within the mixing chamber at high speeds, the energy dissipated at the point of collision is maximized, which helps to increase consistency and quality of mixing, and to reduce particle size of the fluid in the mixing chamber.

20120263013, Oct 18, 2012

Apr 13, 2011

13/085939

RENQIANG XIONG - Newton MA, US
John Michael Bernard - Stoughton MA, US

Microfluidics International Corporation - Newton MA

B01F 15/02

366134

A mixing assembly includes an inlet, an outlet and a mixing chamber, the inlet is fluidly connected to the outlet through a plurality of micro fluid flow paths in a direction perpendicular from the inlet. The micro fluid flow paths fluidly connect to the perpendicular inlet via a curved transition portion. The curved transition portion provides a more efficient flow path for the fluid to travel from the inlet to the micro fluid flow paths to the mixing chamber. By transitioning the direction change, flow resistance is decreased, and the fluid flow rate and shear rate is increased. Increased fluid flow rate and shear rate helps to increase consistency and quality of mixing, and to reduce particle size of the fluid in the mixing chamber.

47103418, Dec 1, 1987

Sep 12, 1986

6/907048

John A. Bernard - Needham Heights MA
Allan F. Henry - Boston MA
David D. Lanning - Hampstead NH
Kwan S. Kwok - Newtonville MA

Massachusetts Institute of Technology - Cambridge MA

G21C 736

376216

Closed-loop controller for altering the power level of nuclear reactors in a safe manner and without overshoot. Apparatus is provided for moving a control element such as a control rod or for adjusting the concentration of a soluble neutron absorber (chemical shim) for altering the nuclear reactor power level. A computer computes at short time intervals the two functions [. rho. (t)-. vertline. rho. sub. c. vertline. /. lambda. sub. e '(t)]/. vertline. rho. sub. c. vertline. and. tau. (t)ln(P. sub. F /P(t)). The direction of motion of the control element is altered when these two functions become equal thereby resulting in the attainment of a new power level without overshoot. In a preferred embodiment, these two functions are computed at intervals of approximately one second.

46379118, Jan 20, 1987

Jul 24, 1984

6/633939

John A. Bernard - Needham Heights MA

Massachusetts Institute of Technology - Cambridge MA

G21C 736

376217

Closed-loop controller for altering the power level of nuclear reactors in a safe manner and without overshoot. Apparatus is provided for moving a control element such as a control rod or for adjusting the concentration of a soluble neutron absorber (chemical shim) for altering the nuclear reactor power level. A computer computes at short time intervals the two functions [. rho. -. vertline. rho. vertline. /. lambda. sub. e ]/. vertline. rho. vertline. and. tau. sub. i 1n(P. sub. F /P. sub. i). The direction of motion of the control element is altered when these two functions become equal thereby resulting in the attainment of a new power level without overshoot. In a preferred embodiment, these two functions are computed at intervals of approximately one second.

47818816, Nov 1, 1988

Jan 5, 1987

7/000472

John A. Bernard - Needham Heights MA

G21C 730

376216

Closed-loop control law for altering the power level of nuclear reactors in a safe manner and without overshoot and in minimum time. Apparatus is provided for moving a fast-acting control element such as a control rod or a control drum for altering the nuclear reactor power level. A computer computes at short time intervals either the function:. rho. =(. beta. -. rho. ). omega. -. lambda. sub. e '. rho. -. SIGMA. beta. sub. i (. lambda. sub. i -. lambda. sub. e ')+l*. omega. +l* [. omega. sup. 2 +. lambda. sub. e '. omega. ] or the function:. rho. =(. beta. -. rho. ). omega. -. lambda. sub. e. rho. -(. lambda. sub. e /. lambda. sub. e)(. beta. -. rho. )+l*. omega. +l* [. omega. sup. 2 +. lambda. sub. e. omega. -(. lambda. sub. e /. lambda. sub. e). omega. ] These functions each specify the rate of change of reactivity that is necessary to achieve a specified rate of change of reactor power. The direction and speed of motion of the control element is altered so as to provide the rate of reactivity change calculated using either or both of these functions thereby resulting in the attainment of a new power level without overshoot and in minimum time.

20210370346, Dec 2, 2021

Aug 16, 2021

17/403152

- Westwood MA, US
Marco G. Catalani - Burlington MA, US
John M. Bernard - Stoughton MA, US
Michael P. Ratigan - Scituate RI, US
David G. Harney - Stoneham MA, US

MICROFLUIDICS INTERNATIONAL CORPORATION - Westwood MA

B05C 17/005
B05C 21/00
F16K 15/04
F16K 11/10

Apparatuses and methods related to a high pressure fluid processing device having a dual check valve setup that can be quickly and easily maintained with replacement parts are disclosed herein. In a general example embodiment, a high pressure processing device includes a body including a first surface having a first recess, a second surface having a second recess, and a third surface having a third recess, a first subassembly at least partially inserted into the first recess of the body, the first subassembly including a first check valve, a second subassembly at least partially inserted into the second recess of the body, the second subassembly including a second check valve, and a third subassembly at least partially inserted into the third recess of the body, the third subassembly coupling the body to a fluid driving mechanism, wherein the first subassembly, second subassembly and third subassembly are configured to be independently attachable to and detachable from the first recess, second recess and third recess, respectively.

20190299171, Oct 3, 2019

May 23, 2019

16/420718

- Westwood MA, US
John Michael Bernard - Stoughton MA, US

MICROFLUIDICS INTERNATIONAL CORPORATION - Westwood MA

B01F 5/02
B01F 13/00

A compact interaction chamber is used to cause high shear, impact forces, and cavitation to reduce particle size and mix fluids while reducing waste and holdup volume. A first housing made of stainless steel holds an inlet mixing chamber element and an outlet mixing chamber element in a female bore using thermal expansion. The inlet and outlet mixing chamber elements are manufactured so that the diameter of the cooled female bore is slightly smaller than the diameter of the mixing chamber elements. The first housing is heated, expanding the diameter of the female bore enough to allow the inlet and outlet mixing chamber elements to be inserted. After the mixing chamber elements are inserted and aligned within the female bore, the first housing is allowed to cool. Once cooled, the female bore contracts and applies sufficient hoop stress to securely hold the mixing chamber elements during high shear force mixing.