Wendell L Tackett

US Patent:

6345870, Feb 12, 2002

Filed:

Oct 28, 1999

Appl. No.:

09/428933

Inventors:

Wendell D. Tackett - Ann Arbor MI

Assignee:

Kelsey-Hayes Company - Livonia MI

International Classification:

B60T 836

US Classification:

3031192, 25112915, 25112902

Abstract:

A control valve for controlling fluid flow in a hydraulic control unit of a vehicular brake system includes a flux tube having an end cap, a thick tube section, and a thin tube section defining an interior volume. An armature is slidably received in the interior volume of the flux tube. A coil is provided about the flux tube. A collar covers a portion of the thin tube section and is spaced from the thick tube section so that an air gap is provided between the coil and the portion of the thin tube section not covered by the collar.

US Patent:

6453930, Sep 24, 2002

Filed:

Sep 9, 2000

Appl. No.:

09/658541

Inventors:

Wendell D. Tackett - Ann Arbor MI

Assignee:

Kelsey-Hayes Company - Livonia MI

International Classification:

F16K 4300

US Classification:

137 1518, 13731503, 137270, 137271, 25112902, 25112915, 3031192

Abstract:

A method for assembling a hydraulic control unit of a vehicular brake system includes the following steps of: providing a sleeve having a closed end; sliding a spring over an armature to form an armature/spring subassembly; orientating the armature subassembly to produce a normally open valve or a normally closed valve; sliding the oriented armature/spring subassembly into the sleeve; sliding a valve seat into the sleeve; crimping a portion of the sleeve onto the valve seat to form a sleeve/valve seat subassembly; inserting the sleeve/valve seat subassembly into a bore of a housing. Two additional steps can be combined with the above listed steps to provide a method of assembling the control valve subassemblies described above on a hydraulic control unit. The additional steps include: inserting the sleeve/valve seat subassembly into a bore in a housing; and pressing a coil assembly about the sleeve.

US Patent:

6520600, Feb 18, 2003

Filed:

Sep 9, 2000

Appl. No.:

09/658536

Inventors:

Wendell D. Tackett - Ann Arbor MI
Gary R. Knight - Livonia MI

Assignee:

Kelsey-Hayes Company - Livonia MI

International Classification:

B60T 836

US Classification:

3031192

Abstract:

A hydraulic control unit of a vehicular brake system includes a housing. A bore is formed in the housing. A valve seat is received in the bore. A sleeve is mounted on the valve seat. The sleeve includes an annular groove for receiving material from the housing to retain the sleeve on the housing. An armature core is slidably received in the sleeve.

US Patent:

6679567, Jan 20, 2004

Filed:

Sep 9, 2000

Appl. No.:

09/658542

Inventors:

Wendell D. Tackett - Ann Arbor MI

Assignee:

Kelsey-Hayes Company - Livonia MI

International Classification:

B60T 836

US Classification:

3031192, 25112915

Abstract:

A control valve for controlling fluid flow in a hydraulic control unit of a vehicular brake system includes a valve seat. A sleeve is mounted on the valve seat. An armature core is slidably received in the sleeve. The armature core has a passage extending between first and second planar end surfaces of the armature core. An armature body is formed from a moldable material onto the armature core. The armature body has a central section received in the passage of the armature core, a first end section extending from the first end surface of the armature core, and a second end section extending from the second end surface of the armature core. This control valve is particularly adapted to be mounted in a bore of a housing of a hydraulic control unit of an electronically controlled vehicular brake system.

US Patent:

6877717, Apr 12, 2005

Filed:

Mar 14, 2003

Appl. No.:

10/389459

Inventors:

David E. Collins - Dearborn MI, US
Wendell D. Tackett - Ann Arbor MI, US
Patrick H. Hool - St. Clair MI, US

Assignee:

Kelsey-Hayes Company - Livonia MI

International Classification:

F16K031/02

US Classification:

25112915, 335261, 335279

Abstract:

A control valve for controlling fluid flow in a hydraulic control unit of a vehicular brake system includes a valve seat. A sleeve is mounted on the valve seat. An armature core is slidably received in the sleeve. The sleeve includes a first ferromagnetic portion adjacent the valve seat, a second ferromagnetic portion, and an annular region defining an area of increased magnetic reluctance. A part of the first portion of the sleeve defines a radial magnetic pole for the generally radial flow of magnetic flux from the armature to the sleeve. A portion of the valve seat adjacent the armature defines an axial magnetic pole for the generally axial flow of magnetic flux from the armature to the valve seat. Together, the generally radial flow of flux and the generally axial flow of flux generate a force urging the armature from an open position toward a closed position when the coil is energized.

US Patent:

55315135, Jul 2, 1996

Filed:

Dec 16, 1994

Appl. No.:

8/358186

Inventors:

Wendell D. Tackett - Ann Arbor MI

Assignee:

Kelsey-Hayes - Romulus MI

International Classification:

F16K 1107

US Classification:

303 842

Abstract:

A combination high pressure accumulator/bypass valve assembly suitable for vehicle control systems such as anti-lock braking systems and traction control systems employs a stationary seal and a reduced part count favoring economy of manufacture and assembly, and eliminates the dynamic seal/light alloy interface, significantly reducing the potential for failure due to pump body/seal abrasion. A caged spring assembly further encourages ease of assembly.

US Patent:

55294669, Jun 25, 1996

Filed:

Sep 27, 1994

Appl. No.:

8/312818

Inventors:

Wendell D. Tackett - Ann Arbor MI

Assignee:

Kelsey-Hayes Company - Romulus MI

International Classification:

F04B 2304
F04B 5312
F04B 5314

US Classification:

417529

Abstract:

A pumping device is provided for pumping fluid from an inlet to an outlet. The pump comprises a piston reciprocable between an inlet chamber and an outlet chamber, a first valve between the inlet and the inlet chamber and responsive to reciprocation of the piston in a first direction to communicate the inlet to the inlet chamber, and a second valve between the inlet chamber and the outlet chamber responsive to reciprocation of the piston in a second direction to communicate the inlet chamber to the outlet chamber, whereby fluid is received in the inlet chamber when the piston reciprocates in the first direction and pumped from the outlet chamber when the piston reciprocates in either direction. Also provided is a pump assembly for pumping fluid for an anti-lock braking system. The pump assembly is a dual action pump including two pistons which are stroked 90. degree.

US Patent:

54776813, Dec 26, 1995

Filed:

Nov 14, 1994

Appl. No.:

8/338970

Inventors:

Wendell D. Tackett - Ann Arbor MI

Assignee:

Kelsey-Hayes Company - Livonia MI

International Classification:

B60T 1120

US Classification:

60562

Abstract:

A dual master cylinder having a bore of uniform diameter extending through an open end thereof and slidably supporting therein a pair of tandem pistons defining a pair of pressurizing chambers. Fuel input is controlled by center-port poppet valves, and the relative disposition of inlet and outlet brake fluid passages are reversed compared to conventional master cylinders to facilitate master cylinder recession into a vacuum booster without requiring long, angled brake fluid passages and to require a shorter and lighter housing. The inlet and outlet passages are positioned so that seals do not slide over fuel passage ports during operation, eliminating seal wear caused thereby and allowing the ports to be larger, thus reducing back pressure and improving compensation when the pistons are returning to, or are in, an unstroked position.