US2133697A - Valve lifter or valve puller - Google Patents

Description

Oct. 18, 1938. B. HANSEN L VALVE LIFTER OR VALVE FULLER Filed Jan. 28, 1957 INVEN TOR. /R/fa wv@ //,4 Msg/v.

vPatented Oct. 18, 1938 UNITED STATES PATENT OFFICE Claims.

The present invention relates to improvements in valve lifters and its principal object is to provide a means for lifting a valve from a cylinder block in such a manner that the pull is exerted 5 in direct alinement with the axis of the valve so that any tendency to set up bending stresses in the valve or in the valve stem is avoided.

A further object of the invention is to provide a valve lifter which has an improved gripping means constructed in such a manner that it uniformly grips or engages almost the entire underface of the valve and therefore uniformly distributes the stresses of the upward pull over the entire area, thus avoiding local bending stresses ll and chipping along the edges of the valve.

A further object of the invention is to use a cylinder as a bearing member against which the valve is lifted, the cylinder being made to surround the valve and to rest on the motor block so that the pressure is uniformly distributed all around the valve.

And finally it is proposed to use as lifting means a cylinder and piston arrangement, in which the piston has a sliding iit in the cylinder and all side sway of the piston is prevented.

Further objects and advantages of my invention will appear as the specification proceeds.

The preferred form of my invention is illustrated in the accompanying drawing in which 80 Fig. 1 shows a side elevation of my valve lifter as applied to a valve, portions being shown in section,

Fig. 2 shows a perspective detail view of the gripping portion of my valve lifter, and

35 Fig. 3 a bottom plan view of the valve lifter While I have shown only the preferred form of my invention I wish to have it understood that various changes or modifications may be made within the scope of the claims hereto attached 40 without departing from the spirit of the invention.

Referring to the drawing in detail, the lifter comprises a cylinder i adapted to be placed on the motor block 2 in encircling relation to the 45 valve I to be lifted, which latter has been previously raised from its seat 4 to the position shown in the sketch, and a gripping member 5 movable in the cylinder.

'I'he gripping member consists of a piston hav- 50 ing a sliding fit with the cylinder and being formed with a cylindrical recess 6 in the side and a V-shaped recess 1 in the bottom, the recesses being formed to permit the piston to slide over the valve head from the side as shown. A

55 threaded rod 8 extends upwardly from the pis- (Cl. iBS-86.3)

ton and/through an opening 8' in the closed upper end 9 of the cylinder, through which it slides freely. A nut I0 threaded on the rod 8 bears on the upper face of the cylinder for raising the rod and the valve. l.

In operation the nut ill is manipulated to first cause the piston to project beyond the lower end of the cylinder. Thereafter the piston is moved over the valve head from the side into the position shown and the cylinder allowed to drop upon l0 the motor block. The nut is then turned downward upon the top of the cylinder, and as this movement is continued the valve is slowly lifted.

It will be noted that this instrument exerts lifting effect on practically the entirel bottom suru face of the valve and in axial, rectilinear direction, whereby any chipping or bending o1' the valve and valve stem are avoided.

As clearly shown in Figure 1, the cylinder l serves to retain the valve 3 against lateral dis- 20 lodgement from the recess 6 when the cylinder is telescoped over the gripping member 5. It is further pointed out that the gripping member 5 can be projected from the lower end of the cylinder I and the valve 3 gripped upon lateral move- 25 ment of the cylinder, the latter being made to serve as a handle for the gripping member. The threaded rod r8 and the nut I0 are then used for moving the cylinder to enclose the valve gripping means.

I claim:

1. In a valve lifter, a valve gripping element comprising a piston having a valve-receiving recess in the side thereof and a radial slot underneath the recess for accommodating a valve stem, and a cylinder mounted for telescoping over the piston and serving to retain the valve against lateral dislodgement from the recess.

2. A valve lifter comprising a piston fashioned with a recess extending inwardly from the rim thereof and adapted to receive the head of 'a valve, the piston below the recess being slotted for accommodating a valve stem and dening flanges to engage under the valve head, a cylinder mounted for telescoping over the piston and against a support, the cylinder serving to retain the valve head against lateral dislodgement'from the recess, and means for moving the piston axially with respect to the cylinder.

3. A valve lifter comprising a piston fashioned with a recess extending inwardly from the rim thereof and adapted to receive the head of a valve, the piston below the recess being slotted for accommodating a valve stem and defining flanges to engage under the valve head, a cylin- I6 5. In a valve lifter, acylinder. means projectible from one end of the cylinder for gripping a valve head upon lateral movement o( the cylinder, and means for moving the cylinder to enclose the gripping means, the cylinder serving to retain the valve head against lateral dislodgement from the gripping. means when the latter is enclosed by the cylinder.

t BIRKELUND HANSEN. 10

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