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Патент USA US2133697

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Oct. 18, 1938.
2,133,697
B. HANSEN L
VALVE LIFTER OR VALVE FULLER
Filed Jan. 28, 1957
INVEN TOR.
ß/R/fa wv@ //,4 Msg/v.
vPatented Oct. 18, 1938
2,133,697
UNITED STATES PATENT OFFICE
2,133,697
VALVE LIFTER 0R VALVE PULLER
Birkelund- Hansen, San Francisco, Calif.
Application January 28, 1937, Serial No. 122,831
5 Claims. (Cl. iBS-86.3)
The present invention relates to improvements
in valve lifters and its principal object is to pro
vide 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
10 means constructed in such a manner that it uni
formly grips or engages almost the entire under
face of the valve and therefore uniformly dis
tributes 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 sur
round the valve and to rest on the motor block so
20 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
25
80
35
40
45
50
55
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 posi
tion shown and the cylinder allowed to drop upon l0
the motor block. The nut is then turned down
ward 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 sur- u
face of the valve and in axial, rectilinear direc
tion, 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 cylin
side sway of the piston is prevented.
,
der I and the valve 3 gripped upon lateral move- 25
Further objects and advantages of my inven ' ment of the cylinder, the latter being made to
tion will appear as the specification proceeds.
serve as a handle for the gripping member. The
The preferred form of my invention is illus
threaded rod r8 and the nut I0 are then used for
trated in the accompanying drawing in which
moving the cylinder to enclose the valve gripping
30
Fig. 1 shows a side elevation of my valve lifter means.
as applied to a valve, portions being shown in
I claim:
1. In a valve lifter, a valve gripping element
section,
’
'
Fig. 2 shows a perspective detail view of the comprising a piston having a valve-receiving re
gripping portion of my valve lifter, and
cess in the side thereof and a radial slot under
Fig. 3 a bottom plan view of the valve lifter neath the recess for accommodating a valve 35
While I have shown only the preferred form stem, and a cylinder mounted for telescoping
over the piston and serving to retain the valve
of my invention I wish to have it understood that
against lateral dislodgement from the recess.
various changes or modifications may be made
2. A valve lifter comprising a piston fashioned
within the scope of the claims hereto attached
without departing from the spirit of the inven
with a recess extending inwardly from the rim 40
thereof and adapted to receive the head of 'a
tion.
Referring to the drawing in detail, the lifter valve, the piston below the recess being slotted
comprises a cylinder i adapted to be placed on
for accommodating a valve stem and deñning
the motor block 2 in encircling relation to the flanges to engage under the valve head, a cyl
inder mounted for telescoping over the piston and 45
valve I to be lifted, which latter has been pre
viously raised from its seat 4 to the position against a support, the cylinder serving to retain
the valve head against lateral dislodgement'from
shown in the sketch, and a gripping member 5
movable in the cylinder.
the recess, and means for moving the piston ax
ially with respect to the cylinder.
'I'he gripping member consists of a piston hav
ing a sliding fit with the cylinder and being
3. A valve lifter comprising a piston fashioned 50
with a recess extending inwardly from the rim
formed with a cylindrical recess 6 in the side
thereof and adapted to receive the head of a
and a V-shaped recess 1 in the bottom, the re
cesses being formed to permit the piston to slide valve, the piston below the recess being slotted
for accommodating a valve stem and defining
over the valve head from the side as shown. A
flanges to engage under the valve head, a cylin- I6
threaded rod_8 extends upwardly from the pis
2
9,188,097
der mounted for telescoplng over the piston .and
against a support, the cylinder having a sliding
llt with the piston and serving to retain the valve
head against lateral dislodgement iromvthe re
cess, andvmeans for moving the piston axially
with respect to the cylinder.
4. In a valve lifter, a cylinder, means project
ible from one end of the cylinder for gripping a
valve head upon lateral movement oi the cylin
10 der, and means for moving the cylinder to en
close the gripping means.
`
5. In a valve lifter, acylinder. means project
ible from one end of the cylinder for gripping a
valve head upon lateral movement o( the cylin
der, and means for moving the cylinder to en
close the gripping means, the cylinder serving to
retain the valve head against lateral dislodgement
from the gripping. means when the latter is en
closed by the cylinder.
t
BIRKELUND HANSEN.
10
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