David Grant Snow

US Patent:

20220213850, Jul 7, 2022

Filed:

Dec 31, 2021

Appl. No.:

17/566785

Inventors:

- Roseville MI, US
Matthew C. GILMER - South Lyon MI, US
David Snow - Redford MI, US

Assignee:

DAYCO IP HOLDINGS, LLC - Roseville MI

International Classification:

F02M 25/08
F02M 35/10
F16K 31/08
F16K 31/06

Abstract:

Magnetic latching valves for a vehicle engine have a housing having a first port and a second port in controlled fluid communication with one another. The housing encloses a linearly translatable armature seated within a solenoid and connected to a primary poppet valve. The armature is movable between an open position and a closed position, respectively, after a pulse of voltage to the solenoid and is in an unpowered state thereafter. A permanent magnet is fixedly seated in a position to magnetically latch the armature in a fully open position. A spring is seated to bias the primary poppet valve closed when the armature is in the closed position. The spring has a spring rate that mechanically relieves pressure by opening the primary poppet valve a distance less than the fully open position when the spring force is exceeded, thereby also allowing flow in the primary flow direction.

US Patent:

20210215264, Jul 15, 2021

Filed:

Jan 10, 2020

Appl. No.:

16/739296

Inventors:

- Troy MI, US
David Snow - Redford MI, US
Mitchell Emond - Shelby Township MI, US
Matthew C. Gilmer - South Lyon MI, US
Joseph Dennis - Farmington Hills MI, US

Assignee:

DAYCO IP HOLDINGS, LLC - Troy MI

International Classification:

F16K 27/02
F16K 15/06

Abstract:

Check valves have a housing defining an internal cavity and a first port and a second port both in fluid communication with the internal cavity and have a hemispherical poppet sealing member within the internal cavity and translatable between a closed position against an annular seat within the internal cavity of the housing and an open position. The annular seat, in a longitudinal cross-section through the check valve, defines a convex spherical radius and, in the closed position, a convex surface of the hemispherical poppet sealing member is sealing engaged with the convex spherical radius of the annular seat.

US Patent:

20200224565, Jul 16, 2020

Filed:

Jan 10, 2020

Appl. No.:

16/740216

Inventors:

- Troy MI, US
Matthew C. GILMER - South Lyon MI, US
David E. FLETCHER - Davison MI, US
Mitchell EMOND - Shelby Township MI, US
David SNOW - Redford MI, US
Joseph Dennis - Farmington Hills MI, US

Assignee:

DAYCO IP HOLDINGS, LLC - Troy MI

International Classification:

F01M 13/02
F16K 15/04
F16K 15/06

Abstract:

Flow control devices herein have a housing defining a plurality of parallel conduits. The first conduit has a normally closed check valve defined to open under a first preselected pressure differential controlling flow through the first conduit in a first direction of flow. The second conduit has a normally neutral check valve defined to open under a second preselected pressure differential in a second direction of flow that is opposite the first direction of flow. The third conduit defines a restriction profile, i.e., has a restrictor, having a third preselected pressure differential. The flow control devices are included as part of an engine system, more specifically a crankcase ventilation breach detection system.

US Patent:

20200224602, Jul 16, 2020

Filed:

Jan 10, 2020

Appl. No.:

16/739831

Inventors:

- Troy MI, US
David E. Fletcher - Davison MI, US
David Snow - Redford MI, US
Mitchell Emond - Shelby Township MI, US
Joseph Dennis - Farmington Hills MI, US

Assignee:

DAYCO IP HOLDINGS, LLC - Troy MI

International Classification:

F02D 41/22
F02M 25/06
F01M 13/00
F02M 35/10
F02B 39/00
F16K 17/12
F16K 17/36

Abstract:

A breach detection system for an internal combustion engine having a crankcase, an intake manifold, a positive crankcase ventilation valve, a crankcase ventilation tube with a flow control system therein, and a pressure sensor between the flow control system and the crankcase. The flow control system subdivides the crankcase ventilation tube into a plurality of parallel conduits—a first conduit having a normally closed check valve that opens under a first preselected pressure drop in a first direction from the air intake to the crankcase, and a second conduit having either a second check valve that opens under a second preselected pressure drop in a second direction opposite the first direction or a restriction profile having a third preselected pressure drop that is the same in both the first and second direction. When the pressure sensor detects no pressure drop there is a breach in the system.

US Patent:

20190323618, Oct 24, 2019

Filed:

Apr 23, 2019

Appl. No.:

16/391941

Inventors:

- Troy MI, US
Matthew C. Gilmer - South Lyon MI, US
David Snow - Redford MI, US

Assignee:

Dayco IP Holdings, LLC - Troy MI

International Classification:

F16K 15/02
F16K 25/00
F16K 27/02

Abstract:

Check valve inserts define a valve seat for an open position of a check valve and have an outer support seatable in an internal chamber of the check valve and have an inner annular ring spaced radially inward from the outer support by a rib that angles axially toward a central longitudinal axis to position an upper surface of the inner annular ring a distance axially beyond an upper surface of the outer support. Check valves have a housing defining an inlet port, an outlet port, and a chamber in fluid communication with the inlet and outlet ports, have the check valve insert seated with the chamber, and have a seal disc moveable within the chamber between the open position defined by the inner annular ring of the check valve insert and a closed position. The seal disc is translatable in response to a pressure difference across the seal disc.