Abrading – Carrier for relatively movable simultaneously usable tools – For radially movable tools
Reexamination Certificate
2001-09-14
2003-05-06
Rachuba, M. (Department: 3723)
Abrading
Carrier for relatively movable simultaneously usable tools
For radially movable tools
C451S470000, C451S473000, C451S483000
Reexamination Certificate
active
06558240
ABSTRACT:
BACKGROUND OF THE INVENTION
In a principal aspect, the present invention relates to a rotary honing tool comprised of honing blades mounted on arms projecting from a rotating body. The arms are biased outwardly for engagement with the cylindrical wall of an engine cylinder. More particularly, the invention relates to a mechanism for controlling the radial position of the honing arms.
The use of a cylinder honing tool to polish or hone the cylinder of an engine block has been facilitated by the use of various special tools. U.S. Pat. No. 2,736,146 for a Cylinder Hone issued Feb. 28, 1956 discloses a tool that has such use. The tool disclosed in U.S. Pat. No. 2,736,146 has been popular and generally, commercially successful. U.S. Pat. No. 2,736,146 is incorporated herewith by reference in its entirety as disclosing a prior art construction.
One of the features of the tool depicted in U.S. Pat. No. 2,736,146 is the use of a collar that controls or limits the radial position or outward extent of the honing arms to which the cylinder honing stones are attached. To adjust this collar and thus adjust the radial position or limit of outward radial movement the honing stones, it is necessary to release a screw that holds the collar in position and then manually rotate the collar followed by resetting the screw. This screw and collar adjustment is often time consuming and troublesome especially in the event that a screwdriver or similar tool is not available to facilitate the loosening and retightening of the screw holding the rotatable collar. Thus there has developed the need for an improved mechanism which will enable engagement and release of the collar which holds cylinder hone support arms.
SUMMARY OF THE INVENTION
Briefly the present invention comprises a rotary honing tool of a type that includes a rotary drive shaft, a body mounted on the drive shaft with a center line axis coincident with the drive shaft axis, and at least one honing support arm extending through a radial guide channel in the body. A biasing element engages and biases the honing arm radially outwardly in the channel. The improvement of the invention comprises an adjustable collar rotatably mounted on the body. The collar includes at least a first and a second detent position which, respectively, permit the hone arm, or arms, to extend radially outwardly to engage the cylinder walls or, alternatively, to hold the hone arms tightly in a position of non-engagement closely aligned with the rotation axis of the tool. The collar thus includes an inwardly projecting tab which fits within a rotational guide slot or channel defined in outside surface of the body. This tab may engage into any one or more detent recesses in the channel and it is also cooperative with an axial channel of the body parallel to the shaft axis that is also provided in the outer surface of the body. The axial channel facilitates assembly of the collar to the body when axially sliding the collar onto the body. The collar further includes inwardly projecting fingers or lips designed to engage the honing arms and hold them in their retracted or inward position aligned with the axis of the tool. Upon rotation of the collar, the fingers may disengage from the arms permitting them to move outwardly to their released position of engagement for honing the cylinder walls.
Thus it is an object of the invention to provide an improved honing tool having a collar that may be easily and manually actuated to control the angular relationship of the arms projecting from the honing tool.
It is a further objection of the invention to provide a honing tool which is rugged, inexpensive, and constitutes a low cost modification of prior art tools and which is economical to manufacture and easy to use.
These and other objects, advantages, and features of the invention will be set forth in the detailed description that follows.
REFERENCES:
patent: 1647133 (1927-11-01), Jennings
patent: 1647134 (1927-11-01), Jennings
patent: 1739956 (1929-12-01), Emerson
patent: 1869377 (1932-08-01), Johnson et al.
patent: 1926835 (1933-09-01), Cook
patent: 1982836 (1934-12-01), Sunnen
patent: 2736146 (1956-02-01), Brooks
patent: 2778168 (1957-01-01), Clark
patent: 2989825 (1961-06-01), Smith
patent: 3381419 (1968-05-01), Johnson
patent: 3624693 (1971-11-01), Werner et al.
patent: 4615152 (1986-10-01), Bogaerts
Banner & Witcoff , Ltd.
Lisle Corporation
Rachuba M.
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