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| Number | Title | Issue Date |
| 6938315 | Tool for facilitating the removal and replacement of engine valve stem springs and seals A tool for the removal and replacement of valve springs on the cylinder head of an internal combustion engine while the cylinder head is either mounted to the engine block within the vehicle or is positioned on a work bench apart from the engine. The tool comprises ... | 09/06/2005 |
| 5371932 | Multiple valve spring compressor A multiple valve spring compressor consists of a rectangular base of sufficient size to support the entire structure, an upper frame member being of a rectangular u-shape, is attached at each end to the base with an expandable device attached at it's cent... | 12/13/1994 |
| 5339515 | Apparatus for removing and installing valve-spring retainer assemblies and for testing the tension of springs employed thereby Apparatus and method for removing, installing and/or testing valve-spring retainer assemblies of internal combustion engines and the like employ an existing spark plug opening to mount a tool which is designed to depress a valve spring and thereby disenga... | 08/23/1994 |
| 5327630 | Apparatus for facilitating removal/replacement of springs of engine valves The detached cylinder head is placed on a table or other flat surface which has a recessed area within which is retained a deformable elastic bladder. Air, water or some other fluid is introduced into the bladder causing it to expand so that it conforms t... | 07/12/1994 |
| 5327646 | Removal/replacement of engine valve springs The detached cylinder head is placed on a table or other flat surface which has a recessed area within which is retained a deformable elastic bladder. Air, water or some other fluid is introduced into the bladder causing it to expand so that it conforms t... | 07/12/1994 |
| 3977064 | Situ valve spring compression tool The disclosure illustrates a valve spring compressor tool which may be used to remove heavy duty double valve springs from an engine with no more disassembly of the engine than removal of the rocker cover. The tool comprises a support bridge bolted to the... | 08/31/1976 |
