Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Reexamination Certificate
1999-07-01
2002-03-19
Maki, Steven D. (Department: 1733)
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
C029S469500, C029S525000, C156S294000, C156S325000
Reexamination Certificate
active
06358349
ABSTRACT:
BACKGROUND OF THE INVENTION
Motors, particularly gas powered motors or automobile engines, create a significant amount of vibration. For example, the action of the cam shaft creates torsional vibration. Torsional vibration can be reduced by using a vibration dampener. Typically the dampener mounts to the drive shaft and includes an annular weight fixed to a hub by an elastomeric member. A pulley may ride on the exterior surface of annular weight. Regardless, it is important that the weight not slip relative to the hub.
The elastomeric member or ring can be formed in a number of different ways. The elastomer can be injection molded between the annular weight and the hub and cured in place. This is by far the strongest bond that can be achieved in the torsional vibration dampener. Alternately a pre-formed or pre-cured elastomeric ring can be forced between the annular weight and the hub. Adhesive can be pre-applied to either surface to improve the bond between the metal weight and the metal hub.
The least expensive torsional vibration dampener simply uses a pre-cured elastomeric member which is compressed and force-fitted between the annular ring and hub. The resulting compression provides a strong bond between the annular ring and hub and prevents relative slippage. However, as this heats, the elastomeric member softens and slipping is a more significant problem.
The concern with relative movement between a elastomeric member and a metal member can be found in other applications such as the rubber bushing on a shock absorber.
SUMMARY OF THE INVENTION
The present invention is premised on the realization that the bond between a previously cured elastomeric member and a metal surface can be significantly enhanced by phosphating the metal surface prior to compression fitting the elastomeric member to the metal member.
Further with certain elastomeric members the bond strength between the metal surface and the elastomeric member can increase as the composite structure is heat aged as might occur during use. The phosphated surface actually promotes a bond between the metal surface and the elastomeric member particularly with respect to pre-cured EPDM and pre-cured ethylene acrylates.
The objects and advantages of the present invention will be further appreciated in light of the following detailed description and drawings in which:
REFERENCES:
patent: 2877543 (1959-03-01), Myers
patent: 3175636 (1965-03-01), Winkelmann
patent: 3287197 (1966-11-01), Errede
patent: 3387839 (1968-06-01), Miller et al.
patent: 3560034 (1971-02-01), Hipsher et al.
patent: 3634146 (1972-01-01), Wystrach et al.
patent: 3799838 (1974-03-01), Shaw et al.
patent: 3893775 (1975-07-01), Sievers et al.
patent: 3955861 (1976-05-01), Orain
patent: 3976624 (1976-08-01), Inouye et al.
patent: 4073047 (1978-02-01), Fishbaugh et al.
patent: 4102046 (1978-07-01), Downing et al.
patent: 4297159 (1981-10-01), Dobias et al.
patent: 4383074 (1983-05-01), Kuan
patent: 4536225 (1985-08-01), Cayless et al.
patent: 4806437 (1989-02-01), Yokoi et al.
patent: 4889578 (1989-12-01), Kei et al.
patent: 5036943 (1991-08-01), Kashiwagi
patent: 5093204 (1992-03-01), Watanabe et al.
patent: 5145025 (1992-09-01), Damian
patent: 5185916 (1993-02-01), Maeno et al.
patent: 5300158 (1994-04-01), Chen et al.
patent: 5316810 (1994-05-01), Rogerson
patent: 5401334 (1995-03-01), O'Melia et al.
patent: 5506059 (1996-04-01), Robbins et al.
patent: 5531841 (1996-07-01), O'Melia et al.
patent: 5579661 (1996-12-01), Yarnell et al.
patent: 5884902 (1999-03-01), Hamada et al.
patent: 514329 (1992-11-01), None
Kirk-Othmer,Encyclopedia of Chemical Technology, vol. 8, pp. 492-500, 1979.
Christenson Bruce
Veselica Gary
Eagle-Picher Industries, Inc.
Maki Steven D.
Wood Herron & Evans LLP
LandOfFree
Method to improve adhesion between pre-cured elastomer and... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method to improve adhesion between pre-cured elastomer and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method to improve adhesion between pre-cured elastomer and... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2870347