David W Fletcher

US Patent:

53911180, Feb 21, 1995

Filed:

May 24, 1994

Appl. No.:

8/248134

Inventors:

M. Michael Tsai - Rochester Hills MI
David E. Fletcher - Flint MI
Joseph W. Zamm - Rochester Hills MI

Assignee:

Dayco Products, Inc. - Dayton OH

International Classification:

F16H 708

US Classification:

474138

Abstract:

A belt tensioner, an actuator therefor and methods of making the same are provided, the actuator of the tensioner having a rotatable shaft that is operatively interconnected to a spring and is provided with opposite ends one of which is operatively interconnected to a piston, the actuator having a casing provided with an internal recess therein that receives the other end of the shaft therein, the spring being adapted to rotate the shaft to extend the piston while the other end of the shaft rotates in the recess and bears against an end sumtrace thereof, the other end of the shaft comprising a thrust washer assembled to the shaft to be carried thereby.

US Patent:

55710611, Nov 5, 1996

Filed:

Nov 1, 1995

Appl. No.:

8/551635

Inventors:

M. Michael Tsai - Rochester Hills MI
David E. Fletcher - Flint MI
Joseph W. Zamm - Rochester Hills MI

Assignee:

Dayco Products, Inc. - Dayton OH

International Classification:

F16H 712

US Classification:

474135

Abstract:

A belt tensioner, an actuator therefor and methods of making the same are provided, the actuator of the tensioner having a rotatable shaft that is operatively interconnected to a spring and is provided with opposite ends one of which is operatively interconnected to a piston, the actuator having a casing provided with an internal recess therein that receives the other end of the shaft therein, the spring being adapted to rotate the shaft to extend the piston while the other end of the shaft rotates in the recess and bears against an end surface thereof, the other end of the shaft comprising a thrust washer assembled to the shaft to be carried thereby.

US Patent:

54999502, Mar 19, 1996

Filed:

Feb 13, 1995

Appl. No.:

8/387521

Inventors:

M. Michael Tsai - Rochester Hills MI
David E. Fletcher - Flint MI
Joseph W. Zamm - Rochester Hills MI

Assignee:

Dayco Products, Inc. - Dayton OH

International Classification:

F16H 708

US Classification:

474138

Abstract:

A belt tensioner, an actuator therefor and methods of making the same are provided, the actuator of the tensioner having a rotatable shaft that is operatively interconnected to a spring and is provided with opposite ends one of which is operatively interconnected to a piston, the actuator having a casing provided with an internal recess therein that receives the other end of the shaft therein, the spring being adapted to rotate the shaft to extend the piston while the other end of the shaft rotates in the recess and bears against an end surface thereof, the other end of the shaft comprising a thrust washer assembled to the shaft to be carried thereby.

US Patent:

20220307637, Sep 29, 2022

Filed:

Jun 16, 2022

Appl. No.:

17/807156

Inventors:

- Roseville MI, US
Kevin W. Lucka - Southfield MI, US
David E. Fletcher - Davison MI, US
Matthew C. Gilmer - South Lyon MI, US

Assignee:

DAYCO IP HOLDINGS, LLC - Roseville MI

International Classification:

F16L 37/12
B60K 15/04
F02M 25/08
F15D 1/02

Abstract:

Female quick couplings have a housing defining an axial bore therethrough that has a frustum-shaped bore portion that defines a restriction orifice, a first slot transverse to the axial bore, an a first shoulder between the first slot and the restriction orifice, and a locking member slidingly received in the first slot. The frustum-shaped bore can have an upstream conical frustum and a downstream conical frustum mated at their respective smaller diameter. The upstream conical frustum has a largest diameter that is larger than a largest diameter of the downstream conical frustum. Engine systems incorporating the female quick coupling and female quick coupling kits are also disclosed.

US Patent:

20210102650, Apr 8, 2021

Filed:

Oct 8, 2020

Appl. No.:

17/065638

Inventors:

- Troy MI, US
Kevin W. Lucka - Southfield MI, US
David E. Fletcher - Davison MI, US
Matthew C. Gilmer - South Lyon MI, US

Assignee:

DAYCO IP HOLDINGS, LLC - Troy MI

International Classification:

F16L 37/12
F15D 1/02
F02M 25/08
B60K 15/04

Abstract:

Female quick couplings are disclosed that have a housing defining an axial bore having a first shoulder and a first slot transverse to the axial bore, a removable insert defining a restriction orifice seated against the first shoulder within the axial bore, and a locking member slidingly received in the first receptacle. The removable insert defines a restriction orifice having an upstream conical frustum and a downstream conical frustum mated at their respective smaller diameter. The upstream conical frustum has a largest diameter substantially similar to an internal diameter of the first sealing member and the downstream conical frustum has a largest diameter substantially similar to an internal diameter of the axial bore extending downstream of the first shoulder. The largest dimeter of the upstream conical frustum is larger than the largest diameter of the downstream conical frustum. Engine systems incorporating the female quick coupling are also disclosed.

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:

20190257441, Aug 22, 2019

Filed:

May 6, 2019

Appl. No.:

16/404049

Inventors:

- Troy MI, US
David E. Fletcher - Flint MI, US
Matthew C. Gilmer - Whitmore MI, US

Assignee:

Dayco IP Holdings, LLC - Troy MI

International Classification:

F16K 31/122
F16K 3/18
B60T 17/02
B60T 13/46
F16K 3/02
F16K 31/08
F15B 15/26

Abstract:

Valves having a sprung gate of various constructions are disclosed. In one embodiment, the sprung gate includes a first endless elastic band having an inner perimeter defining an open space sandwiched between a first gate member and a second gate member that each define an opening therethrough in an open position portion thereof. The first endless elastic band is sandwiched therebetween with its open space oriented for alignment with the opening in both of the first and second gate members, which are aligned with one another to form a passage through the sprung gate. In one aspect, the first endless elastic band in positioned inward a distance from the outer sides of the first and second gate members and spaces the first gate member a distance apart from the second gate member thereby defining a channel having a bottom defined by the first endless elastic band.