US 5,689,870 A · Valve spring compressor tool

Abstract

A valve spring compressor tool useful for removing valve springs from an overhead valve engine of the type having a threaded rocker arm stud adjacent the valve spring and a push rod aligned with the stud and the valve spring. The valve spring compressor tool of the present invention utilizes a crank down nut that has a socket portion for connection to a wrench and a neck portion which. passes through an oblong aperture in a compressor plate, where it is removably locked in position. The crank down nut has a threaded counterbore in its neck portion which threadably engages the rocker arm stud for descending and ascending the length of the stud as the crank down nut is rotated by a socket wrench connected to the socket portion. Axial movement of the crank down nut causes the compressor plate to pivot about its connection with the push rod for compression of the valve spring. A bifurcated end of the compressor plate contacts a retainer cap on the valve spring to compress the spring without interfering with the valve stem or a keeper on the valve stem, which allows for removal of the keeper while the spring remains compressed.

Claims12

Dependent claims

A valve spring compressor tool for removing valve springs from an overhead valve engine of the type having a threaded rocker arm stud adjacent the valve spring and a push rod aligned with the rocker arm stud and the valve spring, the tool comprising:

a compressor plate having a first end with push rod engaging means and a second end with a spring engaging portion, and an aperture intermediate said first and second ends for receiving the rocker arm stud;
a crank down nut having a socket portion and a coaxial, reduced diameter neck portion, said socket portion having torque receiving means for receiving rotational torque applied to said crank down nut, and said neck portion having an internally threaded cylindrical counterbore axially extending into said neck portion to receive the rocker arm stud;
connecting means for connecting said crank down nut to said compressor plate;
torquing means for applying rotational torque to said crank down nut;
and
whereby the rotational torque applied to said crank down nut in one direction causes said crank down nut axially to descend the rocker arm stud by threaded engagement between said counterbore and the rocker arm stud such that the downward axial movement of said crank down nut causes said compressor plate to pivot on the push rod and compress the spring.

3 more elements

A valve spring compressor tool kit for removing valve springs from an overhead valve engine of the type having a threaded rocker arm stud adjacent the valve spring and a push rod aligned with the rocker arm stud and the valve spring, the tool kit comprising:

a compressor plate having a first end with push rod engaging means and a second end with a spring engaging portion, and an aperture intermediate said first and second ends for receiving the rocker arm stud;
a first crank down nut having a socket portion and a coaxial, reduced diameter neck portion, said socket portion having torque receiving means for receiving rotational torque applied to said first crank down nut, and said neck portion having an internally threaded cylindrical counterbore axially extending into said neck portion to receive the rocker arm stud;
a second crank down nut having a socket portion and a coaxial, reduced diameter neck portion, said socket portion having torque receiving means for receiving rotational torque applied to said second crank down nut, and said neck portion having an internally threaded cylindrical counterbore axially extending into said neck portion to receive the rocker arm stud;
wherein said internally threaded counterbore of said first crank down nut has a first diameter and said internally threaded counterbore of said second crank down nut has a second diameter, and said first diameter is different from said second diameter;
connecting means for connecting one of said crank down nuts to said compressor plate;
torquing means for applying rotational torque to one of said crank down nuts;
and
whereby the rotational torque applied to one of said crank down nuts in one direction causes said one crank down nut axially to descend the rocker arm stud by threaded engagement between said counterbore thereof and the rocker arm stud such that the downward axial movement of said one crank down nut causes said compressor plate to pivot on said push rod and compress the spring.

5 more elements

Dependencies are inferred from the claim text.

Valve spring compressor tool

Life of this patent

Valve spring compressor tool

Life of this patent

Abstract

Claims12