Supports – Brackets – Specially mounted or attached
Reexamination Certificate
1999-04-09
2001-04-03
Braun, Leslie A. (Department: 3632)
Supports
Brackets
Specially mounted or attached
C248S058000, C248S062000, C248S074100
Reexamination Certificate
active
06209833
ABSTRACT:
CROSS-REFERENCE TO RELATED APPLICATIONS
Not Applicable
BACKGROUND
1. Field of Invention
This invention relates to securing CHEVROLET V8 type oil pump parts, specifically the pick-up tube to the oil pump body.
BACKGROUND
2. Description of Prior Art Many GENERAL MOTORS engines, particularly CHEVROLET Built, use oil pumps in which the pick-up tube or strainer is press fit to the oil pump body. The fitting process used at the factory works well enough and there are few problems with new vehicle engines.
A defect in this design manifests itself in the after market where the oil pump and pick-up tube, are sold separately. A good press fit is not always accomplished. It is not uncommon for the pick-up screen to disengage from the oil pump. The resulting loss of oil pressure usually leads to catastrophic engine damage and failure. This is a common problem in rebuilt engines, especially high performance.
A common remedy, is brazing or tack welding the pick-up tube to the pump. There are several drawbacks to this solution. The oil pump is cast iron and the pick-up tube is mild steel. These dissimilar metals require a high degree of skill to properly tack weld or braze. The heat required to braze or tack weld can easily damage the pump or pick-up or both. Because of the dissimilarity of the metals the parts may seem to be welded but not actually welded. Brazing or welding is time consuming and the parts must be allowed to cool before installing. Welding or brazing actually voids the warranty on the parts.
SUMMARY
In accordance with the present invention, the retainer comprises a formed sheet metal clamp. This formed clamp bolts to the oil pump by existing bolts on the oil pump. The other end loops around the oil pump pick-up tube. The looped portion has holes, which allow a bolt and nut. The bolt and nut are tightened to securely clamp the oil pump pick-up tube in place.
OBJECTS AND ADVANTAGES
Accordingly, besides the objects and advantages of, the bolt-on oil pump pick-up retainer, described in my above patent, several objects and advantages are:
A. To provide an inexpensive remedy for disengagement of press fit oil pick-up tubes.
B. To require no special skills
C. To require no special equipment
D. To provide quick and easy installation
E. To provide security without modifying pump or pick-up
Further objects and advantages are that the retainer is reusable and simple to manufacture.
REFERENCES:
patent: 4787768 (1988-11-01), Lange
patent: 5295646 (1994-03-01), Roth
patent: 5344111 (1994-09-01), Gantzert
Braun Leslie A.
Wujciak A. Joseph
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