IP Library › Granted Patent US 7,198,554
Granted Patent B2
US 7,198,554 · App. 10/819,878 · Granted Apr 3, 2007

Method of making valve guide having textured external surface

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Quick Facts
Patent No.
US 7,198,554
App. No.
10/819,878
Granted
Apr 3, 2007
Kind
B2
Abstract

A cylindrical valve guide having a roughened external surface texture from about 50 to about 100 microinches permits effective amounts of lubricating oil to become trapped or contained by such roughened external surface and thereby facilitates subsequent press fitting of the valve guide into an internal combustion engine. Centerless grinding constitutes a preferred method of achieving the surface texture of the invention.

Claims (4)

1. A method of making a valve guide for use in an internal combustion engine comprising,

(a) Providing a cylindrical semi-finished valve guide having a longitudinal hollow interior and a longitudinal cylindrical external surface; and

(b) Centerless grinding said external surface with a grinding wheel having a dressed grinding surface to obtain a roughened surface texture on said external surface of from about 50 to about 100 microinches, wherein said grinding surface of said grinding wheel is dressed through contacting the grinding surface with a dressing fixture and then making at least four passes of said dressing fixture across said grinding surface during rotation of said grinding wheel with about 0.003 to about 0.004 inches in depth being removed from said grinding surface during each pass to remove a total depth of about 0.010 to about 0.020 inches from said grinding surface.

2. The method of claim 1 , wherein said dressing fixture comprises a rotary star dresser.

Assignments (19)
RELEASE OF SECURITY INTEREST Recorded Jan 8, 2018
From: PNC BANK, NATIONAL ASSOCIATION
To: HELIO PRECISION PRODUCTS, INC.
Reel/Frame 045017/0042 →
SECURITY INTEREST Recorded Dec 27, 2017
From: NATIONWIDE PRECISION PRODUCTS CORP.; HELIO PRECISION PRODUCTS, INC.; HN PRECISION HOLDING INC.; HM PRECISION COMPANY
To: PNC BANK, NATIONAL ASSOCIATION
Reel/Frame 044492/0506 →
RELEASE OF SECURITY INTEREST Recorded May 3, 2016
From: MANUFACTURERS AND TRADERS TRUST COMPANY
To: HELIO PRECISION PRODUCTS, INC.
Reel/Frame 038447/0372 →
RELEASE OF SECURITY INTEREST Recorded Oct 13, 2014
From: PNC BANK, NATIONAL ASSOCIATION, AS ADMINISTRATIVE AGENT
To: HELIO PRECISION PRODUCTS, INC.
Reel/Frame 033935/0115 →
SECURITY AGREEMENT Recorded Oct 13, 2014
From: HELIO PRECISION PRODUCTS, INC.
To: PNC BANK, NATIONAL ASSOCIATION, AS AGENT
Reel/Frame 033973/0886 →
ASSIGNEE PREVIOUSLY RECORDED ON REEL 032423 AND FRAME 0100 SHOULD BE PRECISION PARTNERS HOLDING COMPANY AND CERTAIN OF ITS SUBSIDIARIES. ASSIGNOR HEREBY CONFIRMS THE RELEASE OF SECURITY INTEREST IN INTELLECTUAL PROPERTY. Recorded Apr 4, 2014
From: CIT CAPITAL USA INC.
To: PRECISION PARTNERS HOLDING COMPANY AND CERTAIN OF ITS SUBSIDIARIES
Reel/Frame 032771/0389 →
SECURITY INTEREST Recorded Mar 11, 2014
From: HELIO PRECISION PRODUCTS, INC.; NATIONWIDE PRECISION PRODUCTS, INC.; HN PRECISION COMPANY
To: PNC BANK, NATIONAL ASSOCIATION, AS ADMINISTRATIVE AGENT
Reel/Frame 032406/0818 →
RELEASE OF SECURITY INTEREST IN INTELLECTUAL PROPERTY Recorded Mar 10, 2014
From: CIT CAPITAL USA INC.
To: LEHMAN COMMERCIAL PAPER INC.
Reel/Frame 032423/0100 →
RELEASE OF SECURITY INTEREST IN PATENTS Recorded Feb 27, 2014
From: CIT CAPITAL USA INC.
To: HELIO PRECISION PRODUCTS, INC.
Reel/Frame 032366/0937 →
RELEASE OF SECURITY INTEREST IN PATENTS Recorded Jan 28, 2014
From: MANUFACTURERS AND TRADERS TRUST COMPANY
To: HELIO PRECISION PRODUCTS, INC.
Reel/Frame 032133/0739 →
SECURITY AGREEMENT Recorded Sep 19, 2012
From: HELIO PRECISION PRODUCTS, INC.
To: MANUFACTURERS AND TRADERS TRUST COMPANY
Reel/Frame 029007/0368 →
AMENDED AND RESTATED INTELLECTUAL PROPERTY SECURITY AGREEMENT Recorded Jul 2, 2010
From: PRECISION HOLDING LLC; PRECISION PARTNERS HOLDING COMPANY; MID STATE MACHINE PRODUCTS; GREENFIELD TOOL & MANUFACTURING, INC.; GALAXY INDUSTRIES CORPORATION; GENERAL AUTOMATION, INC.; NATIONWIDE PRECISION PRODUCTS CORP.; GILLETTE MACHINE & TOOL CO., INC.; MOTORWHEEL COMMERCIAL VEHICLE SYSTEMS, INC.; MOTORWHEEL COMMERCIAL VEHICLE SYSTEMS MEXICO, INC.; HELIO PRECISION PRODUCTS, INC.; FRISBY ACQUISITION, LLC; BERKSHIRE INDUSTRIES, INC.; CANNON AUTOMOTIVE SOLUTIONS-BOWLING GREEN, INC.
To: CIT CAPITAL USA INC., AS ADMINISTRATIVE AGENT
Reel/Frame 024630/0045 →
RELEASE OF SECURITY INTEREST IN PATENTS, PREVIOUSLY RECORDED AT REEL 018291, FRAME 0328 Recorded Jul 1, 2010
From: LEHMAN COMMERCIAL PAPER INC., AS SECOND LIEN ADMINISTRATIVE AGENT
To: PRECISION PARTNERS HOLDING COMPANY; HELIO PRECISION PRODUCTS, INC.; MID STATE MACHINE PRODUCTS; GREENFIELD TOOL & MANUFACTURING, INC.; MOTORWHEEL COMMERCIAL VEHICLE SYSTEMS, INC.
Reel/Frame 024626/0760 →
RESIGNATION, WAIVER, CONSENT AND APPOINTMENT AGREEMENT AND FOURTH AMENDMENT TO THE CREDIT AGREEMENT-RESIGNATION OF ADMINISTRATIVE AGENT AND APPOINTMENT OF SUCCESSOR ADMINISTRATIVE AGENT Recorded Jul 1, 2010
From: LEHMAN COMMERCIAL PAPER INC., AS ADMINISTRATIVE AGENT
To: CIT CAPITAL USA INC., AS SUCCESSOR ADMINISTRATIVE AGENT
Reel/Frame 024626/0684 →
RELEASE OF SECURITY INTEREST Recorded Jan 12, 2009
From: ABLECO FINANCE LLC
To: HELIO PRECISION PRODUCTS, INC.
Reel/Frame 022086/0973 →
INTELLECTUAL PROPERTY SECURITY AGREEMENT Recorded Sep 22, 2006
From: PRECISION PARTNERS HOLDING COMPANY; HELIO PRECISION PRODUCTS, INC.; MID STATE MACHINE PRODUCTS; GREENFIELD TOOL & MANUFACTURING, INC.; MOTORWHEEL COMMERCIAL VEHICLE SYSTEMS, INC.
To: LEHMAN COMMERCIAL PAPER INC.
Reel/Frame 018291/0328 →
INTELLECTUAL PROPERTY SECURITY AGREEMENT Recorded Sep 21, 2006
From: PRECISION PARTNERS HOLDING COMPANY; HELIO PRECISION PRODUCTS, INC.; MID STATE MACHINE PRODUCTS; GREENFIELD TOOL & MANUFACTURING, INC.; MOTORWHEEL COMMERCIAL VEHICLE SYSTEMS, INC.
To: LEHMAN COMMERCIAL PAPER INC.
Reel/Frame 018279/0570 →
SECURITY AGREEMENT Recorded Mar 17, 2006
From: HELIO PRECISION PRODUCTS, INC.
To: ABLECO FINANCE LLC, AS AGENT
Reel/Frame 017323/0273 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 7, 2004
From: LIVINGSTON, HOWARD M.
To: HELIO PRECISION PRODUCTS, INC.
Reel/Frame 015196/0972 →