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Патент USA US2136745

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Nov*l l5, 193B.`
Original Filed July l2, 1954
Il '.
Patented Nov. 15, 1938
Norman K. Jellinghaus, Philadelphia, Pa.
Application July 12, 1934, Serial No. 734,729
Renewed June 16, 1937
foiaims. <01.V iai-_184)
My invention is a knife type cleaning device
for smoking pipes. Such devices cleanse the bowl
by a cutting or scraping action with the side or
bottom walls or both. They have been generally
5 troublesome because lacking in practical form of
cutting blade and practical means of operating
them. My invention aims to eliminate both of
these troubles and to constitute the device a prac
tical machine in a true sense.
In the first place, I form the knife of high
grade steel of relatively narrow blade form yet
quite sharp but of generous cross section whereby
the blade though'stiff and sharp, through its nar
rowness conforms accurately to the carbon coated
" walls with which it is supposed to coact, This
section of blade I carry radially across the bottom
wall of the bowl and then axially along the side
Walls of the bowl, forming the walls of the bowl
Figure 5 is a top plan view of the bowl.
Figures 6 and '7 are sections taken axially of
the bowl showing modifications of the structure
and I provide this shank with an axial elongation
a metallic barrel I5 the interior of which con
In the second place, I provide means for ro
stitutes the stem orifice I4 and also the chamber
of a piston type force pump. In Fig. l the piston
of this pump is designated I6 and the piston rod
I 'I.
So far as its relation to this case is con
cerned, suffice it to say that when the rod I'I
(which is directly connected to the mouthpiece
I8) is drawn from the stem II, the piston I6 30
cleanses the chamber and orifice I4 of-its con
densed content.
The annular orifice I9 constitutes the sole and
certainly the principal draft connection between
tributed. A tine depended from the radial arm
of the knife type cleaner projects into this ori
the bowl II! and the stem orifice I4. The annular
nature of this orifice can be clearly seen both in
Figs. 4 and 5. Its bottommost portions 20 are
somewhat enlarged in cross section and com
municate directly with the stem orifice or cham
ber I4 by way of port 2l in the walls of the tube
I5. The transaxial cross section of the orifice I9
at the bottom of the bowl, however, is constrict
ed and is preferably not consequentially different
fice and when the cleaner is operated, cleans
from the cross section of the stem port 2|, the
the orifice at the same time that the bowl is
relations of the cross sections, whether the same
orifice I form of a cross section the aggregate
40 area of which is substantially that of the draft
orifice of the stem whereby the draft is dis
Referring to the accompanying drawing
Figure 1 is an axial cross section of the bowl
shank of the cleaner being shownin collapsed
tating this knife comprising a shank projected
axially through the bottom wall of the bowl,
capable of being extended and collapsed to pro
25 ject an operating head thereof from the bottom
of the bowl for convenient operation or to house
that head within the general contour of the bot
tom of the bowl out of the way and out of .side
sight. This shank is journaled in a metallic bush
30 ing itself fixedly threaded into the bottom of the
Thirdly, I improve the general draft conditions
of the pipe by interconnecting the bowl and the
stem through an annular orifice concentric with
35 the rotatable shank of the cleaner and taking the
place of the usual side or central orifice, particu
larly the central orifice, the position of which is
now occupied by the shank of the cleaner. This
Figure 3 is a view of the botto-m portion of
the bowl particularly in axial cross section to
display the elongation of the shank of the cleaner
to permit it to be manipulated.
Figure 4 is a view of the stem portion of the
pipe and substantially in the same section but in
perspective the better to portray the annular and
circular form of the mounting and operating
parts of the cleaner and of the draft orifice, the
of the bottom of the bowl.
The bowl is designated IB, the stem II. The
side walls of the bowl are designated I2, the
bottom walls I3, and the stem orifice by I4.
This stem is of the form covered in my Patent
No. 2,106,747, dated Feb. l, 1938. It embodies
cylindrically for this purpose.
of the bowl taken substantially on line 2--2 of
Fig. 1.
and stem in principal part showing a mounting
for the knife type cleaner and the draft orifice in
axial crosssection along with the bowl and the
Figure 2 is an axial cross section of thestem in
55,; the plane of transaxialcross, section of the bottom
or inconsequentially different, being such that the
draft is annularly distributed substantially uni
formly around the bottom of the bowl. A lesser
orifice section is best.
This form and distribution of the draft aper 50
ture leaves the center of the bottom available
for the mounting of the knife type cleaner. This
mounting is in the form of a bushing 22 exter
nally shouldered at its upper end and internally
shouldered. Vat4v its lower end. The bushing is. 55
threaded axially through the bottom of the bowl
properly constricts the orifice I9. The bushing
from the inside in such manner that its external
shoulder abuts a portion of the bottom wall and
29 is shouldered at its upper end to abut the
upper end of the bushing 22 and also to project
therebeyond and bear upon the ring 31 to re
tain the same in place about the bushing 22.
Ring 31 is also threaded and pinned to the upper
end of bushing 22.
The operation of smoking consists merely in
filling the pipe, packing to any extent desired,
fixes it in axial position. Within this bushing
22 is journaled an axially extensible shank 23
for the knife type cleaner. This shank at its
upper end is provided with an external shoulder
and its lower end with an operating head 24
whereby it may be turned. The shank is as
10 sembled into the bushing from its open upper
end and the lower end of the shank projects
and lighting and smoking it by drawing through `
the aperture I9. The draw is uniformly distrib
through the lower end of the bushing where head .. uted and the smoking excellent all the way to
the bottom of the charge. The smoke complete,
24 is joined thereto by pin connection 25 per
mitting easy placement and removal for assembly one grasps the head 24 by the thumb and fore
finger, extends it from the position in Fig. 1 to
and dis-assembly.
the position in Fig. 3, and rotates itV one or two
Joui'naled in the upper end of the bushing 22
complete revolutions, thereby loosening the resi
is a knife type cleaner 26. The shank 21 of this
cleaner is angular and is fitted slidably in a due of the charge, whereupon the residue may be
complemental angular socket 28 of the bushing freely dumped.
The act of cleansing the bowl of residue not
shank 23 whereby rotation of the shank 23 ro
tates the knife 26. The knife 26 is also journaled only scrapes the side walls of the bowl to an ex
in the upper end of bushing 22. This journaling tent permitting the determinate carbon residue
desired, but also by the action of tine 35 cleanses
is by means of a journal bushing 29 threaded
the orifice I9 from which the removed material
into the shouldered upper end of the'bushing 22
and carrying the revolving journal bearing 30 passes into the port 2I and from which latter
(see Figs. l, 4 and 5) fitted on tothe angular residue and condensation is removed by the pump
knife shank 21 (see Figs. 2 and 3). Shank 21, plunger I6. The knife 26 when the pipe is new
preferably lies a determinate distance from the
bushing 29 and journal 30 are constituted a unit
side wall I2, such for example, as the distance 38
by a confining washer or spring 3| force ñtted
around the angular shank 21 and abutting by its whereby the bowl is coated with carbon or caked,
as is commonly said, to a depth of a small frac-Y
margins the lower end of the bushing 26. Thus
these three parts, the knife 26, the bearing 29 tion of an inch before the knife begins actually to
and journal 39, may be applied to and removed scape the side walls of the bowl. After the car
from bushing 22 as a unit by threading bushing bon caking has proceeded to this depth, the knife
will accurately maintain the bowl of uniform
29 into and out of the upper end of bushing 22.
To facilitate this assembly the` bushing 29 is pro
open diameter.
vided with sockets 32 for a small spanner wrench.
The knife 26 is comprised of radial portions 33
radially traversing the bottom wall I3 and an
integral axial portion 34 coacting with the car
bon coated side walls I2 of the bowl. The shank
21 and the portions 33 and 34 are an integral
Figure 6 shows the structure wherein the ring
31 is integral with the bushing 22. Figure 7
shows the construction where the ring 31 is inte-l
gral with the bowl I0. In this instance the bowl 40
piece of right angular formation of the general
part-way into the ring 31 whereby a pipe cleaner
may transect the annular orifice I9 cleansing it
perfectly at this point. The tine 35 similarly 45
configuration of the letter Z. 'I'he portions 33
and 34 however are not of regular polygonal form
but are of flattened polygonal form generally
trapezoidal as clearly appears in Figs. 4 and 5.
The opposed edges are beveled and sharp. The
blade is relatively narrow readily conforming
50 therefore to the large curvature of the side walls
of the bowl I2. Yet the general cross section is
stocky and the blade as formed of high grade steel
quite stiff.
The under ’side of the radial portion 33 of
55 the blade is provided with the tine 35 which pro
jects into the annular orifice I9 and to a suf~
iicient depth therein to thoroughly cleanse the
aperture when the cleaner 34 is rotated. In
deed, this depth is such that tine 35 reaches into
60 the port 2I by which the annular orifice I9 com
municates with the stern orifice I4, whereby it
may also cleanse this port. To this end orifice I9
overlies port 2l and the side walls of port 2I
are cut away in such fashion as to permit tine
65 35 to rotate therethrough when the knife 26
is turned. To facilitate the formation of orifice
I9 and to aiiord it the difference of cross section
between its bottom 20 and its upper end, the
bottom wall I3 of the bowl is constituted jointly
70 by the iiush upper faces 36 (see Fig. 5) of the
bushing and journal 29-30 and of a surrounding
ring 31. This ring 31 fits closely around the
upper end of bushing 22, is at its upper face flush
with the faces 36 of members 29 and 30, and
75 has an outer periphery of a dimension Vwhich
cleaner is illustrated without a stem ejector. In
such case the stem orifice I4 is drilled through
transects the orifice I4 and for the same purpose.
Many modifications may be made without de
parting in any wise from the generic spirit of
my invention and these modifications should be
protected to me by the appended claims.
What I claim as new and useful and desire to '
protect by Letters Patent isz
1. In a smoking pipe, a bowl, a cleaner knife
coacting with the side walls of the bowl and
means to rotate. the knife journaled axially of the „
bottom of the bowl and comprising an axially
elongatable shank terminating in an external ac
tuating head, which head is normally housed.
within the bottom general contour of the pipe but
when the shank is elongated is projected there
beyond for freedom of operation.
2. In a pipe, a bowl, a stem, an annular orifice
in the bottom of the bowl in open communication
with the stem, a movable bowl cleaner and orifice
cleaning means carried by the bowl cleaner to
thoroughly clean opposed walls of the orifice.
3. In a pipe, a bowl, a stem, an annular orifice
in the bottom of the bowl constituting means of
communication between the bowl and the stem,
a rotary knife type bowl cleaner and a tine car
ried by the knife and projecting into the annular
orifice to thoroughly clean opposed walls thereof
at the same time the cleaner is rotated to clean
the bowl.
4. In a pipe, a bowl, a bushing having its upper 75V
end externally shouldered and its lower end in-v
ternally shouldered, threaded axially into the
.bottom of the bowl from the inside thereof to
abut the bottom wall by its external shoulder, an
externally shouldered shank journaled in said
bushing to project out of the lower end thereof
with its shoulder abutting the internal shoulder
l of the bushing, a knife type bowl cleaner jour
naled in the upper end of said bushing and hav
ing a shank coupled to the said bushing shank in
axial extensible relation, and means to retain the
shouldered shank in the bushing and the knife
shank in the shouldered shank against axial dis- 5
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