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Патент USA US3021661

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Feb. 20, 1962
3,021,651
V..M‘ FULLER ETAL
VALVE AND SEAT GRINDING TOOL
Filed July 24. 1959
2 Sheets-Sheet 1
Var/0n M. Fuller
Dana/d A. Weaver
ZNVENTORS
BY @4062“
?Mrbnqs
Feb' 20, 1962
v. M. FULLER ETAL
3,021,651
VALVE AND SEAT GRINDING TOOL
Filed July 24, 1959
2 Sheets-Sheet 2
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Var/on ‘ M. Fuller -
Dona/d A. Weave/j
, INVENTORS
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United States Patent() " lC€
3,21,653
‘Patented Fee. 20, 1962
1
2
3,921,651
These together with other objects and advantages which
will become subsequently apparent reside in the details of
VALVE AND SEAT GRENDING TOGL
Vet-ion M. Fuller, 2% Qountry Club Road, North Little
Rock, Arln, and Donald A. Weaver, 814 W. 2nd St,
Little Rock, Ark.
construction and operation as more fully hereinafter de
scribed and claimed, reference being had to the accom
panying drawings forming a part hereof, wherein like nu
merals refer to like parts throughout, and in which:
FIGURE 1 is a side elevational view of the valve and
seat grinding tool shown removably secured to the chuck
of a conventional form of portable electric power drill
This invention relates to a novel and useful valve and
seat grinding tool which is adapted to greatly simplify the 10 with the grinding stone being shown in phantom lines in
position grinding the face of a conventional form of pop
job of refacing valves and valve seats and includes an at—
tachment for dressing the grinding stones or wheels to
pet valve;
FIGURE 2 is an enlarged exploded perspective view of
the correct angle.
the valve and seat grinding tool showing the manner in
With the increasing cost of skilled labor in the ?eld of
automotive repair, many vehicle owners have become “do~
which the tool is assembled;
FIGURE 3 is a longitudinal vertical sectional view of
it-yourself” minded and are themselves attempting to per
the invention shown mounted in position to re-face the
form a major portion of the necessary repairs to their
valve seat of an internal combustion engine;
automobiles. The present invention is particularly
FIGURE 4 is a side elevational view of the tool like
adapted to enable an automobile owner to grind both the
‘that of FIGURE 1 but with the tool dresser attachment
valve faces and the valve seats of the engine in his auto
shown in place of the poppet valve and one end of the
mobile with the minimum amount of equipment and at
tool dresser being supported between the jaws of a con
a relatively low cost so that mechanically minded auto
ventional form of vise, the vise being shown in phantom
‘mobile owners may more readily perform the job of grind
.in the valves of their automobile engines themeslves.
l lines;
Filed July 24,. 1959, Ser. No. 829,300
2 Qlaims. (Cl. 51-241)
. . The valve grinding attachment is speci?cally adapted to
, FIGURE 5 is a top plan view of the attachment as
be powered by a conventional form of electric drill which
many of the “do-it-yourself” enthusiasts have already se
cured to do various other jobs which may be accom
seen in FIGURE 4 but with the portable electric power
drill removed; and
FIGURE 6 is a fragmentary view of the tool dresser as
seen in FIGURE 4, but showing the tool dresser facing
plished by a portable electric drill.
The tool has been speci?cally designed so that the parts 30 the opposite face of the grinding wheel.
Referring now more speci?cally to the drawings, the
which are subject to wear may be readily replaced at a
numeral 10 generally designates the valve and seat grind
nominal cost. Thus, even after performing one or more
ing tool comprising the present invention. The tool 10
valve grinding operations on his own automobiles, the at
comprises a cylindrical guide body 12 having a bore 14
tachment may be used by friends or other persons who
formed longitudinally therethrough. Bore 14 is provided
also wish to perform the same operation to their auto
with a counterbore 16 which is adapted to slidably re
mobiles. Further, the attachment has been so designed
ceive a cylindrical sleeve 18. The cylindrical sleeve 13
so that it may also be used with substantially every form
is provided with a longitudinal bore 20 whose purpose is
of internal combustion engine utilizing poppet valves for
the entrance of a combustible mixture into the combustion
to be hereinafter set forth.
chamber of an engine and the discharge of ‘the exhaust
The forward end of the guide body 12 is provided with
an externally threaded neck portion 22 which is adapted
gases therefrom.
Many persons have as a hobby the repairing of various
forms of internal combustion engines and the tool com
to removably secure the grinding stone or wheel 24 to
the guide body 12 by means of an internally threaded
cylindrical hub 26 secured within bore 28 formed through
prising the present invention has been designed so that
45
the center of the stone 24.
it may be used again and again for the process of grind
With attention directed more particularly to FIGURE 3
ing valves and valve seats. Further, with the increasing
of the drawings, it will be noted that the stone 24 is pro
demand for power lawn mowers and other tools having
vided with a recessed frusto-conical surface 30 on one
internal combustion engines as the power source, repair
side and a projecting frusto-conical surface 32 on the
shops whose business includes the repair of these tools
will ?nd that this invention represents a relatively inex 50 other side. It will be understood that the stone 24 may
be removably secured to the threaded neck portion 22
pensive tool which may be used very effectively to grind
with either of the faces 30 or 32 adjacent the guide body
valves and valve seats.
12.
The main object of this invention is to provide a rela
tively inexpensive tool which is quickly adapted to grind 55 The sleeve 18 may be removably secured within the
guide body 12 by means of setscrew 34 which is thread
either the valve face or the valve seats of an internal
edly engaged in a threaded bore (not shown) which is
combustion engine and a tool that may be conveniently
in communication with bore 16.
powered by a conventional form of portable electric power
A coupling generally referred to by the reference nu
drill.
.
A further object of this invention, in accordance with 60 meral 36 is adapted to either abut the rear end surface 38
of the guide body 12 or be removably secured thereto if
the preceding object, is to provide an attachment which
it is desired. The rear end 33 of the guide body 12 is
may be utilized to face the grinding surface of the grind
provided with a plurality of threaded bores 46‘ and the
ing wheel to any desired angle which enables the tool to
coupling 12 is provided with an equal number of apertures
be used in connection with internal combustion engines
having valve faces and valve seats of varying degrees of 65 42 which are registrable with bores 40 and adapted to
slidingly receive the threaded shank portions 44 of fasten
inclination.
ers 46 which may be threadedly engaged in bores 40‘.
A ?nal object to be speci?cally enumerated herein is
The coupling 36 is provided with a longitudinally extend
to provide a valve seat and grinding tool which will con
ing bore 48 which has a counterbore 50. The counter
form to conventional forms of manufacture and be rela
- tively sturdy and simple in construction so as to provide 70 bore 50 is adjacent the guide body 12 and is in align
a tool which will be economically feasible, long lasting,
-ment with bore 20 formed therein. The coupling 36 is
also provided with a suitable number of threaded bores
and easy to use.
'
3,021,85 1
4
3
52 which extend diametrically thereacross and are in com
munication with counterbore 50. Threadedly engaged
in each of the threaded bores 52 is a setscrew 54 whose
purpose is to be hereinafter set forth.
Bore 43 is of su?icient diameter to slidingly receive
one end portion of a ?exible shaft 56 which is removably
secured therein by means of lockpin 5E. The other end
of the ?exible shaft (not shown) is adapted to be re
movably secured within the conventional form of chuck
60 secured to the output shaft (no-t shown) of a portable
electric drill 62.
With attention now directed more particularly to FIG
engagement with the seat 104 until the latter has been
ground to the correct degree.
it will be noted that the stone 24 is reversed in position
when grinding valve seat 104 so that the face 32 may
project into the seat 1534.
With attention now drawn more particularly to FIG
URES 4 through 6 of the drawings, when it is desired
to true either of the faces 30 or 32 of the grinding stone
24, the coupling 36 secured to the guide body 12 by means
of fasteners 46 and the guide shaft 66 of the tool dresser
64 is rotatably journailed and slidingly disposed within
bore 20.
The attachment arm 76 is rotated to the de
URES 4 through 6, it will be seen that there is provided
sired position and secured in that position upon the tight
a tool dresser generally referred to by the reference nu
meral 64;. The tool dresser 64 has on one end a guide
ening of retaining nut 1% on the bolt 74 whereupon the
diamond point 88 on the end of the dressing shaft 86
shaft 66 which is adapted to be slidingly received and
rotatably journalled within bore 20. The other end of
the tool dresser attachment 64 comprises a body 68 whose
remote end 7i) is adapted to be engaged between the
jaws of a vise '72. Rotatably journalled on the body 68
about an axis extending transversely thereof by means
may be moved into contact with either the surface 30 as
shown in FIGURE 6 or the surface 32 of the grinding
wheel 24 as shown in FIGURE 4 to dress the surfaces
of the stone to the desired angle. It is to be understood
that any convenient means may be utilized to position
the guide shaft 66 relative to the grinding wheel 24 so
that the latter will be held in correct position relative to
of pivot bolt 74 is an attachment arm 76 having on its
outer end an elbow portion 73 having a non-circular open
the diamond point 88 during the process of truing either
ing 80 formed therethrough. A dressing shaft 82 having
the face 30 or 32 of the stone 24. Most conveniently, the
a cross-section complementary to opening 80 is slidably 25 free end of the guide shaft 66 may abut against the ad
jacent end of the ?exible shaft 56 with the diamond point
received therein and has on one end an operating knob
83 then being adjustably positioned by turning the dressing
84- and on the other end a transversely extending threaded
tool 86 within the threaded bore (not shown) formed in
bore (not shown). Threadedly engaged in the last men
the end of the dressing shaft 82. In this manner, the
tioned bore is an externally threaded dressing tool 86
having ‘a diamond or other suitable stone engaging tip 30 diamond point 38 may be correctly positioned relative to
the plane of the desired surface 32 on the stone 24, and
38 thereon for dressing either the surface 3% or 32 of
upon the operation of the drill 62 the dressing shaft 82
the grinding stone 24. The attachment arm 76 is provided
may be moved longitudinally to cause the movement of
with a circular enlargement on the end adjacent the body
the diamond point 88 across the surface 32 of the stone 24.
68 ‘which has suitable indicia 9i} thereon which will indi
The foregoing is considered as illustrative only of the
cate by means of pointer 92 the angle of the bore 80
principles of the invention. Further, since numerous
relative to the guide shaft 66 which coincides with the
modi?cations and changes will readily occur to those
axis of rotation of the grinding stone 24.
skilled in the art, it is .not desired to limit the invention
In operation, with attention drawn more particularly
to the exact construction and operation shown and de
to FIGURE 1 of the drawings, when it is desired to face
scribed, and accordingly all suitable modi?cations and
‘the surface of a conventional form of poppet valve 94,
equivalents may be resorted to, falling within the scope
‘the ?exible shaft ‘56 is secured within chuck 60 and the
valve stem as is secured within counterbore 50 by means
of setscrews 54.
The fasteners 46 are not used to secure
‘the coupling St? to the guide body 12 and it will be appar
cut that the latter including the grinding stone 24 may
then be moved longitudinally of the valve stem 96 until
face 3% engages the seat of the valve 94. ‘With the elec
tric drill 62 operating, the coupling 36, secured to the
of the invention as claimed.
What is claimed as new is as follows:
i. A valve and seat grinding tool comprising a guide
body having a ?rst bore extending therethrough adapted
to slidingly receive and rotatably journal a valve stem,
a coupling having one end adapted to abut against one
end of said guide body, a second bore formed through
said coupling alignable with said ?rst bore and having a
valve stem 96 rotates the valve 94 so that when it is
brought into contact with the face 30 the seat of the 50 portion adjacent said one end adapted to slidingly re—
valve 94 will be ground to that angle at which the face
ceive a valve stem, means on said coupling adapting the
36 of the stone is ground. A person grinding the face
latter to be removeably secured to a conventional drill
of the valve 94 would hold the drill 62 in one hand and
chuck, means in said coupling adapted to removably
the guide body 12 in the other hand moving the guide
retain a valve stem in position within said second bore, a
body 12 back and forth along the valve stem Q6 moving 55 valve grinding wheel, said wheel having a recess on one
the face 30 into and out of engagement with the seat of
side adapted to grind the face of a conventional form
the valve 94 until the seat was ground true.
of poppet valve, means removably securing said wheel to
With attention now drawn more particularly to FIG
URE 3 of the drawings, it will be seen that a guide shaft
said body with said recess remote therefrom, a counter
-by means of setscrew 34. When the ?exible shaft 56
rotates the coupling 36 the stone 24 also rotates with the
a coupling having one end adapted to abut against one
end of said guide body, a second bore formed through
bore formed in said ?rst bore, a cylindrical sleeve slidably
98 is positioned within the valve guide 100 that is secured 60 disposed in said counterbore, means removably securing
within the motor block 162 in alignment with the valve
said sleeve in position within said counterbore for rota
seat 104. The coupling 36, when it is desired to grind the
tion with said guide body, said sleeve having a third bore
valve seat of a motor, is removably secured to the guide
formed therethrough in alignment with said ?rst bore
body 12 by means of fasteners 46 and the end of the
and adapted to slidingly receive a valve stem.
guide shaft 38 received within counterbore 50 is remov 65
2. A valve and seat grinding tool comprising a guide
ably secured therein by means of setscrews 54, the guide
body having a ?rst bore extending therethrough adapted
shaft 98 being secured for rotation with guide body 12
to slidingly receive and rotatably journal a valve stem,
end of the guide rod 98 extending through the grinding 70 said coupling alignable with said ?rst bore and having
stone 24 being rotatably journalled and slidably received
a portion adjacent said one end adapted to slidingly
within the valve guide 100 so that the drill 62 may be
moved towards and away from the seat 104 with the
receive a valve stem, means on said coupling adapting the
latter to be removably secured to a conventional drill
chuck, means in said coupling adapted to removably
guide shaft 98 sliding in the valve guide 100 as the face
32 of the grinding stone 24 is brought into and out of 75 retain a valve stem in position within saidv second bore,
3,021,651
6
a valve grinding wheel, said wheel having a recess on
one side adapted to grind the face of a conventional form
of poppet valve, means removably securing said wheel to
said body with said recess remote therefrom, a guide
shaft having one end adapted to be positioned in a valve
guide of an internal combustion engine and the other end
rotatably and slidably received in said ?rst bore, said
grinding wheel having a frusto-conical projection on the
other side adapted to grind a valve seat of said engine,
‘means removably securing said grinding wheel to said 10
guide body with said projection remote from said body,
and means removably attaching said coupling to said
guide body for rotation therewith, a counterbore formed
in said ?rst bore, a cylindrical sleeve slidably disposed in
said counterbore, means removably securing said sleeve in 15
position within said counterbore for rotation with said
guide body, said sleeve having a third bore formed there
through in alignment with said ?rst bore and adapted
to slidingly receive a valve stem.
References Cited in the ?le of this patent
UNITED STATES PATENTS
Clarlcson ____________ __ May 23, 1916
1,183,855
Fnshs ________________ __ Oct. '3, 1922
1,430,976
1,635,463
1,636,560
1,747,685
1,785,978
2,576,333
2,632,364
2,769,287
Davis ______________ __ July 12,
196,868
1,142,899
Great Britain ________ __ May 3,
France ____________ __ Sept. 24,
Hall _______________ __ July 19,
Roy ________________ __ Feb. 11,
Quinn _____________ __ Dec. 23,
Earl], ______________ __ Nov. 27,
Boyce _____________ __ Mar. 24,
Arp ________________ __ Nov. 6,
1927
1927
1930
1930
1951
1.953
1956
FOREIGN PATENTS
1923
1957
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