Metal working – Means to assemble or disassemble – Means comprising hand manipulatable tool
Patent
1976-04-30
1977-04-26
Jones, Jr., James L.
Metal working
Means to assemble or disassemble
Means comprising hand manipulatable tool
29283, B25B 2714
Patent
active
040192350
ABSTRACT:
A tool for removing a piston from a cylinder of a piston driven engine, particularly a diesel engine, comprises a cylindrical sleeve member having a length greater than the length of the piston to be removed, an outside diameter less than the diameter of the cylinder and in side diameter greater than the diameter of the piston. There are means adjacent one end of the sleeve member for inserting the sleeve into and removing the sleeve member from the cylinder. There are biasing means adjacent the opposite end of the sleeve member, such as flexible tabs and/or a coil spring, for engaging a wall of the piston, for example the bottom wall, to enable the sleeve member to be withdrawn from the cylinder within the sleeve member. The opposite end of the sleeve member is slightly beveled to facilitate entrance of the sleeve member into the cylinder, over the piston.
In a preferred embodiment of the invention, the means for inserting and removing the sleeve member preferably includes means for abutting the top of the piston in such a way as to locate the sleeve member with respect to the piston. In this embodiment, the cylindrical sleeve member is preferably formed of thin stainless steel and includes a longitudinal separation. The sleeve member also includes a lateral annulus near the opposite end and the biasing means, such as a spring, is located in the annulus for engaging the bottom wall of the piston. After the sleeve member is inserted into the cylinder an outer cylindrical sleeve member is placed around the cylindrical sleeve member to tightly engage and lock the sleeve member onto the piston so that it can be withdrawn from the cylinder.
REFERENCES:
patent: 1435278 (1922-11-01), Campbell
patent: 2050005 (1936-08-01), Heegeman
patent: 2646619 (1953-07-01), McCord
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