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Патент USA US3100670

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Aug. 13, 1963
Filed March 9, 1960
5 Sheets-Sheet 1
Korl August Duppengiesser
4AL> FIG.4
Aug. 13, 1963
Filed March 9, 1960
3 Sheets-Sheet 2
L5~~8A ‘ '
K°''| AuQuStD'L'IppenQiesser
- Aug- 13, 1963
Filed March 9, 1960
s Sheets-Sheet s
FIG .ll
Karl August D'Lippengiesser
United States Patent 0 F 1C6
Patented Aug. 13, 1963
tailed description of certain embodiments, reference being
made to the accompanying drawing in which‘:
FIG. 1 \is a top-plan view of a blade for a spade, shovel
Karl August Diippcngiesser, Unter der Chariottenbnrg 1,
or similar implement according to the invention;
FIG. 1A is a rear-elevational view of the blade;
Gera-Langenherg, Thuringia, Germany
Filed Mar. 9, 1960, Ser. No. 13,943
11 Claims. (Cl. 294-67)
FIG. 1B is an enlarged sectional view taken along
line 1B--1B of FIG. 1A;
FIG. 1C is a cross-sectional view taken along line
My present invention relates to soil-working implements
1C-—1C of FIG. 1A;
such as shovels, spades, rakes, hoes, hay forks and the
FIG. 2 is a side-elevational view, partly ‘in section, of
like in which a metallic socket, fastened to the operative 10
part of the implement, is adapted to receive a wooden . a socket member adapted to be secured to the blade;
FIG. 3 is a View, similar to FIG. 2 and taken in section
along the line III—III of FIG. 4, showing the socket
The use of friction to retain the handle in its socket is
member provided with a handle;
satisfactory only for the plaiuest implements of this type,
FIG. 4 is a bottom-plan view of ‘the socket member,
designed for the purpose of amateur gardeners and other 15
illustrating in ‘greater detail the fastening means joining
occasional users. For other uses, and particularly for
the latter to the handle;
heavy-duty work, it is necessary to’ resort to supplemental
FIG. 4A is a cross-sectional view taken along line 4A-—
fasteners such as bolts, screws or rivets to prevent com
4A of FIG. 4;
plete detachment of the handle (from the blade after
FIG. 5 is a view, similar to FIG. 1, of another blade
prolonged utilization of the tool. Even the presence 20
according to the invention;
of such fasteners, however, does not avoid a certain loosen
FIG. 6 is a side-elevational view, partly in section,
ing of the handle in its socket in the course of time, due to
illustrating a link for joining the blade of FIG. 5 to a
a weakening of the ?t through operational stresses and/ or
socket member;
a shrinking of the wood as it dries upon aging.
The resetting of a handle so loosened is cumbersome
FIG. 7 is a cross-sectional view taken along line 7-—7
since it generally requires the drilling of new holes .in
- of FIG. 6;
FIG, 8 is an axial cross-sectional view showing a socket
the handle and/ or the socket to accommodate the fasten
ing means in the new relative position of the parts. It is,
therefore, a major object of my present invention to pro
vide an improved assembly of socket, handle and fastener
adapted to avoid this inconvenience.
I have found, in accordance with this invention, that
the resetting of worn or dried-out tool handles in an
implement of the aforedescribed character is most con
member joined to the blade of FIG. 5;
FIG. 8A is a cross-sectional vie-w taken along line 8A-—
8A of FIG. ‘8;
veniently accomplished by the provision of a longitudin
FIG. 11 is a perspective view of a spade according to
i ‘ still another embodiment of the invention; and
FIG. 11A is a detail view, somewhat enlarged, of a por
tion of the socket member shown in FIG. 11.
In FIGS. 1, 1A, 1B and 1C I show a blade It} adapted
40 to be joined to a socket member and a handle to produce
ally extending slot ‘in its socket, such slot being provided
with two or more longitudinally spaced pairs of recesses
adapted to receive a retaining piece which is radially dis
placeable on the handle and which is carried on a stud
or bolt engaging the latter, such as the head of a screw or
FIG. 9‘ is 1a bottonnplan view of a socket member ac
cording to another embodiment of the invention;
FIG. 10 is a plan View of a blank for the socket member
illustrated in ‘FIG. 9*;
a heavy-duty soil-working implement of exceptional rigid
ity. The blade 10‘, preferably formed by stamping or
forging from.- sheet steel, is provided with a lip 11 along
lengthwise shifting of the handle which can then be se
cured in a new [position by a re-tightening of the fastener 45 its edge remote from its sharpened, ground-engaging work
ing edge; Lip 11, bent at an angle of substantially 90°
to lodge the retaining piece in a different recess of the
a block or washer held by a screw, whereby a loosening ‘ *
of the fastener holding the retaining piece will enable a
slot. More particularly, I propose to make the socket
from a ?at piece of sheet metal which, ‘when rolled into a
. to the plane of the blade, is provided with a projection
12 of triangular con?guration, which is formed with a
slot 12’. 'llie blade 10 is also provided with cutouts or
sleeve to form the tubular socket member, has a seam
slots 13‘, 14’ and 14, adapted to receive complementary
constituted by a pair of adjacent edges; these edges I 50 lngs
carried ‘by a socket member, and enlargements 15-,
provide with preferably symmetrical indentations which,
when brought together along the seams, constitute the
aforementioned slot.
. 15' and 16 communicating with the slots 13-, 13' and 14,
respectively, to facilitate the subsequent welding of these
‘slots. A link member 17, of generally triangular con
Since the formation of a socket from a tlat sheetmetal
?guration, is provided with a rear tongue 17’ which is
blank is, therefore, one of the features of my present in 55 received in slot 12', a lower tongue 21 which is received
vention, it is also an object thereof to provide means for
in a slot 20‘ provided therefor in blade 10 (FIG. 1C),
conveniently and securely attaching a socket so formed
and an upper tongue 18.
In FIGS. 2, 3, 4 and 4A I show a socket member 31}! in
to the operative part of an implement, in particular to the
side which the lower portion 41 of a wooden handle 40
blade of a shovel or spade. In accordance with the latter
60 is secured by a screw 42‘ having an enlarged head. The
aspect of the invention 1 form slots in the blade adapted to
socket member 30 is for-med with an upper slot 31, dd
receive complementary projections of the socket, and/ or of
mensioned to receive the tongue ‘18 of link member 17,
a special attachment forming a link between the socket and
and a pair of transversely spaced notches 34- adapted to
the blade (e.g. as generally disclosed in my co~pending
engage the lip 11 on either side of link member 17. Socket
applications Ser. Nos. 733,924 and 633,901- respectively 65 member
30 is also provided with a pair of side lugs 33 and
?led May 8, 1958 and January 14, 1957), now‘ Patent Nos.
an end lug 32, respectively receivable in slots 13, i3’ and
3,009,726 and 2,956,831, the assembly being completed
14. Lugs 32 and 33‘ may then be welded to'the blade
by a Welding of the link member and/ or the socket to the
10 within socket 35)‘ through the enlarged portions 15, 15-’,
blade after the latter has been interlockingly connected
16 of the slots. Advantageously, the material displaced
70 in forming slots 13, 13' and 14 may, as shown at 26 in
The above and other objects, features and advantages
FIG. 1B, merely be bent outwardly to provide additional
will become more fully apparent from the following de—
welding ‘surfaces at the slots. For maximum rigidity, the
link member 17 maybe Welded to the blade ill at 19v (FIG.
1) ‘before the assembly of the implement, and to the
socket member at 35 to join the tongue 18 to the latter at
slot 31, therein.
It will be apparent that the socket member 30 is in
from a blank 76', illustrated in FIG. 10. The blank 70’
is shown to be provided with teeth 75 at indentations 76’
along the edges 77’ of the blank which, upon rolling, form
the seam 77 and which may be completely or partially
welded as described with reference to FIG. 3.
the form of a tube whose front end has been ‘beveled, at an
slightly trapezoidal shape of blank 70" causes tube 74}
acute angle to its axis, to provide a bearing surface which
to converge somewhat toward the front, with progressive
rests on the 1blade 10 and from which the lugs 32,, 33 pro
wedging of the handle upon its forward displacement.
jeot to engage the blade,
FIGS. 11 and 11A illustrate a spade according to the
As best seen in FIGS. 3, 4 and 4A, the socket member 10 invention wherein the socket member 99‘ is provided with
30, preferably rolled from a blank of the type illustrated
a handle 91, secured thereto by a bolt 93 whose head is
in FIG. 10, is provided along its abutting edges with in
not shown in these figures. The handle ?ts snugly into
dentations adapted to form a longitudinal slot 36 which
the socket member 90, whichv may be slightly tapered
axially extends along the member 3d‘ when the latter is
to lodge the handle more ?rmly therein. The ‘socket
given its ‘generally cylindrical configuration. ‘The slot 15 member 90 is formed with ‘a groove 94, studded with
36 is formed with recesses -37 adapted to'receive the en
downwardly-directed sawteeth 95 which are successively
larged head 4-3 of screw 42 in a plurality of positions along
engaged by the resiliently interconnected wings of a
, this slot which is dimensioned to pass the shank of the
‘ screw but not its head; to this end the recesses 37 are
shallower than the slot 36, 'as seen in FIGS. 3 and 4.
In operation, the socket member 30' is ‘fastened to the
handle 40 vby screw 42 whose head is countersunk in the
recess 37 which is farthest from the blade-engaging portion
of the socket member. When the seam 44 of socket mem
retaining plate 96; the body of this plate is secured by
the bolt 93 to handle 91 to prevent the withdrawal of
the latter from the socket member. It will be apparent
that the handle may be tightened in the socket merely
by driving it more ?rmly into the latter as by banging
the spade against the ground, whereupon plate 96 engages
other teeth 95 located closer to the blade to hold the
ber 30‘ is completely welded with the exception of slot 36, 25 handle in its adjusted position._ It should be noted that
the handle 40 may be seated more tightly in the socket
the teeth of opening 76 in FIGS. 9 and 10 could be saw
tooth-shaped as illustrated in FIGS. 11 and 111A, in which
the screw 42 from engagement with its recess, driving the
case the retaining plate 78 may be replaced by a fastening
handle further into the socket member, and resetting the
member which may be similar to plate 96, but preferably
screw 42 in engagement with another recess 37 further 30 non-resilient since there would be sufficient resilience in
member, erg. upon the shrinking of the wood, by removing
along the groove 36 toward the blade whereby the end 41
of the handle becomes more tightly wedged against the .
the spreading of the seam to permit the plate to travel
downwardly from its initial position upon a tightening of
the handle.
straight rear portion 3012. Should the seam 4-4 be closed
The invention as described and illustrated permits of
only partly by welding (as shown at 38), socket member 35 many modi?cations and substitutions within’ the ability
30 will have su?icient resilience to permit the spreading
of persons skilled in the art and deemed to be included
of slot 36 and the. re-engagement of the screw 42 further
within the spirit and scope of the invention, except as
along toward the blade when the handle is thrust down
further limited by the appended claims:
wardly into the socket member to compensate for shrink‘
I claim:
age or wear.
1. A soil-working implement comprising a blade, a
In FIGS. ‘5-8 and 8A I show a modi?ed blade '50, pro
socket rigid with said blade, a handle received in said
vided with a socket-forming trough 51 and cutouts or
socket, and a retaining member secured to said handle,
slots 53, 53' and 54 adapted to receive the lugs 63, 63’ and
said socket being provided with a slot extending in longi
curved intermediate socket portion 30a adjoining the
64 of a bipartite substantially saddle-shaped link member
tudinal direction of the handle, said slot being formed
60 ‘whose two halves ‘61, 61’ are integral, respectively, 45 along its major sides with pairs of aligned recesses en
with upper tongues ‘62, 62'. The link member 60 is
gaged by said retaining member in a plurality of axially '
shaped to form a generally conical funnel adapted to re
shifted relative positions of said handle and said socket,
ceive the end of a handle member 52, FIG. 8, in- coopera
the sides of said slot and said retaining member being
tion with the trough 51. The convergence of tunnel 51,
relatively yieldable in a resilient manner ‘and to a suf?cent
60 has the same clamping effect as the bent shape of tube 50 extent to permit ‘axial displacement of said retaining
30 in the preceding embodiment. A socket member 55,
member along said slot in response to impact.
adapted to accommodate the handle member 52, is formed
2. An implement according to claim 1 wherein said
with an upper slot 56 dimensioned to suit the upper
recesses are serrated.
tongues ‘62, 62’ which maybe welded to the socket member
3. An implement according to claim 2 wherein said
at 57. The socket member 55 encloses the link member 55 recesses are sawtooth~shaped and point toward said blade.
60 (FIGS. 8 and 8A), which may be welded to the blade
4. A soil-working implement comprising a blade, a
50 through the slots 53, ‘53’ and 54, while the socket
socket rigid with said blade and extending rearwardly
member 55, may, in turn, be welded to the blade about its
therefrom, a handle received in said socket, and fasten
periphery 58 in contact therewith and along the seam
ing means secured to said handle, said socket being pro»
51’ formed with trough 51. The generally cylindrical
vided with 1a generally rectangular slot extending in longi
socket member is provided with teeth 59 adapted to engage
tudinal direction of the handle and with a plurality of
a fastening member joining the socket to a handle, such
pairs of aligned recesses extending externally on said
fastening member being illustrated at 78 in FIG. 9.
socket along the longitudinal sides of said slot while being
In the latter ?gure, I show a socket member 70, similar
to socket member '30, formed with notches 74 and lugs 72, 65 shallower than the outer surface of said socket, said fasten
ing means including a stud traversing said slot and a
73. Socket member 70, however, is provided with a gen
erally rectangular opening 76 in the seam 77, the major
retaining member of larger dimensions overlying said ‘
sides of the rectangle being studded with teeth 75 adapted
slot from without, said retaining member being'held by
to engage a toothed plate 7 8 in a plurality of axial posi
said stud and being selectively receivable in any of said
tions along opening 76. The plate 78vis provided with a 70 pairs of recesses in a plurality of axially shifted relative
hoie 79, adapted to receive a screw or other fastener
positions of said handle and said socket, said slot being
engaging the handle 40, whereby the handle may be
formed in a resiliently yieldable part of said socket for
secured in the socket member 70 at a plurality of axial
positions adapted to compensate for wear or shrinkage of
su?icient extent to permit axial displacement of said
the handle. Preferably, the socket member 79 is rolled
retaining member along said slot in response to impact.
temporary transverse separation of said recesses to a
5. An implement according to claim 4 wherein said
recesses are arcuate.
6. An implement according :to claim 4 wherein said
10. An implement according to claim 8, further com
prising a link member embraced by said front end and
anchored to both said tube and said blade, said link mem
socket comprises a substantially ‘cylindrically curved piece
ber being substantially saddle-shaped and provided with
of sheet metal having a seam formed between adjoining
a central upper ridge penetrating an adjacent upper wall
portion of said tube and bearing with its ?anks from
above upon said blade, said ?anks at least partly embrac
sheet edges, said edges being recessed to form said slot.
7. An implement according to claim -6 wherein said
ing the forward end of said handle, said projecting forma
seam is formed by edges that are interconnected at two
tion being an integral part of said link member.
locations each beyond a respective end of said slot
11. An implement according to claim 101 wherein said
whereby the sides of said slot are resiliently spreadable. 10
blade is formed with a trough registering with said saddle
8. A soilav‘orking implement comprising a socket mem
shaped member and complementing same a generally
ber in the form of a tube with a seam formed by two
conical funnel for said handle substantially in line with
adjoining edges of said piece, said tube having a rear
the body [of said tube.
portion with a slot formed by registering indentations
along said edges and extending along part of said seam, 15
said edges being recessed at spaced locations along said
indentations and forming a plurality of enlargements of
said slot, a handle received in said tube, fastening means
for adjustably securing said handle to said tube in a
selected axial position, said fastening ‘means including a
retaining member on said handle receivable in any ‘of said
References Cited in the ?le of this patent
Feely ________________ __ July 16, 1895
Moore ________________ __ Feb. 2,
Shaffer _______________ __ Oct. 14,
Michelin _____________ __ Dec. 30,
Surbaugh ____________ __ Apr. 12,
Ervin _________________ __ Oct. 2,
Washington ___________ __ Dec. 8,
Ready _______________ __ Sept. 20, 1938
member being relatively yieldable in a resilient manner
and to a su?icient extent to permit axial displacement of 30
said retaining member along said slot in response to
Wharton _____________ __ Jan. 10,
Miller _______________ __ Sept. 26,
Harte ________________ .. May 7,
Harte ________________ __ May 7,
Runlrle ______________ __ June 12,
Olvey _______________ __ May 17,
enlargements and passing through said slot by way of
one of said enlargements, said tube having a front end
remote from said hand-1e beveled at an acute angle to its
axis, said tube further having a deformation ahead of, 25
said front end for progressively ‘wedging said handle upon
relative forward movement of the latter, and a blade
welded thereto, the sides of said slot and said retaining
9. An implement according to claim 8 wherein said
tube is welded along parts of said seam remote from said
slot, said seam being spreadable at said slot.
Great Britain __________ __ Jan. 30, 1952
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