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Патент USA US3028112

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April 3, 1962
w. D. EGLY
7
3,028,101
TRAVELING LAWN SPRINKLER
Filed May 4, 1960
5 Sheets-Sheet 1
\31
170
54'
l4
WILLIAM D. EGLY
—_ 1
22
/a
INVENTOR.
/4
-
ATTORNEY
I April 3, 1962
w. D. EGLY
3,028,101
TRAVELING LAWN SPRINKLER
Filed May 4, 1960
5 sheetswsheet 2
44
#44
l
8
35 mo 82’
INVENTOR.
WILLIAM D. EGLY
Z7,” 12W
ATTORNEY
April 3, 1962
3,028,101
W. D. EGLY
TRAVELING LAWN SPRINKLER
I5 Sheets-Sheet 5
Filed May 4, 1960
A
v
w
2.0x.“
Z.
v".lIwa:mfyln
7/ INVEN TOR.
WILLIAM D. EGLY
ATTORNrQY
3,023,131
Unite States Patent
Patented Apr. 3, 1962
1
2
3,028,101
cylinder member 26 whose bore communicates with a
bore 27 formed in the housing 20 and extending to the
TRAVELING LAWN SPRINKLER
parting face thereof abutting the end plate 24.
The cylinder 26 slidably receives0 a piston 28 recip
William D. Egly, 817 W. North Shore Drive,
South Bend, Ind.
Filed May 4, 1960, Ser. No. 26,789
12 Claims. (Cl. 239-190)
rocable therein ‘and having a piston rod 30 connected
thereto and extending through an opening in the front wall
of the cylinder 26 to project forwardly beyond said cylin
der. The outer or free end of the piston rod 30‘ is con
This invention relates to improvements in traveling
nected by suitable securing means 32 to- the laterally pro
lawn sprinklers, and more particularly to self-propelled
sprinklers of the type which advance themselves by en 10 jecting arm 34 of a bracket 36 preferably mounted verti
cally upon the base plate 10 to which it is welded or
gaging and traveling along an elongated guide member,
otherwise ?xedly secured at a horizontal bottom ?ange 38
such as a hose which connects the sprinkler to a source
thereof. The piston 28 is double-acting and reciprocates
of water under pressure. Examples of sprinklers of this
general type are those shown in U.S. Patents No. 2,716,
within the cylinder 26 and serves as a means for varying
573, dated August 30, 1955, and No. 2,835,531, dated 15 the relative position of the base plate 10 and housing 20
as will ‘be described.
May 20, 1958.
The housing 20 includes a laterally offset vertically
The primary object of this invention is to provide a
projecting portion 40 and is provided with an upright
device of this character which is simple in construction,
bore 42 substantially concentric with the housing part 40
light in weight, easy to position, connect and disconnect
and condition for operation, which has a minimum num
20 opening at the upper end of the projection 40 and termi
ber of operating parts compactly arranged in a novel
relation and which is comparatively inexpensive in con
struction.
A further object is to provide a device of this character
having a novel combination and arrangement of parts, 25
wherein relatively shiftable parts carry guide gripping
means and are shifted by a double-acting hydraulic pres
sure member whose operation is controlled automatically
and periodically by means responsive to a water reactance
nating spaced above the bottom of the housing 20, as
best seen in FIG. 8. A shaft 44 is journaled in the bore
42 and is provided with a worm portion 46 adjacent its
lower end. The shaft 44 projects above the housing por
tion 4-0 and is retained therein by a nut or gland mem
ber 48 bearing upon an annular enlarged or shoulder
portion 5a. The shaft 44 has a longitudinal bore 52
extending theret-hrough from its upper end to a point ad
jacent the worm portion 46 thereof and adjacent its inner
30 end has a plurality of apertures 54 therein which are
discharge sprinkler unit.
A further object is to provide a device of this char
acter having a novel reversing valve operated in response
to a rotatable member and serving to control the path of
?ow of water therethrough to a ‘double-acting reciprocat
adapted to register with a passage 56 in said housing
leading to the parting plane thereof and communicating
with an elongated passage de?ning groove 58 in said
parting plane. Said groove is spanned by the housing
35 member 24, as seen in FIG. 8, to complete the passage
ing piston power member.
de?ned thereby. A T-?tting 60 is mounted on and con
Other objects will be apparent from the following spec
nected to the upper end of the tubular shaft 44 and
elongated sprinkler arm 62 terminate in angularly bent
portions 64 which mount sprinkler nozzles 66 to de?ne
water reactance sprinkler means which rotate incident to
expulsion of water therefrom when said angularly pro
jected portions 64 are oriented to extend in opposite
directions in the manner well understood in the art.
ing jaw employed in the device;
The parting face of the housing 20 has a horizontal
FIG. 4 is a top plan view of the device with parts
45 transverse semi-circular groove 70 formed therein and
shown in section;
mounting an elongated tubular member 72 in ?xed posi
FIG. 5 is a schematic view illustrating the operating
tion, said tubular member projecting into and having a
arrangement of the parts and the control of ?uid flow to
snug ?t in a semi-circular groove 74 complementary to
effect operation of the device;
the groove '70 and formed in the member 24, as best seen
FIG. 6 is a view of a modi?ed embodiment of the
device with parts shown in section taken at a position 50 in FIG. 7. The registering grooves 70 and '74 commu
i?cation.
In the drawings:
FIG. 1 is a side elevational view of the device;
FIG. 2 is a fragmentary front view of the device with
parts broken away;
FIG. 3 is an enlarged detail view illustrating a clamp
indicated by line 6—6 of FIG. 1;
FIG. 7 is a fragmentary sectional view taken on line
7—7 of FIG. 6; and
nicate with enlarged chamber de?ning portions 71 and 75
adjacent one side of the housing 20. The chamber por
tion 71 communicates with the bore 42 at the portion ‘of
said bore in which the worm 46 is located. A shaft 76
FIG. 8 is a fragmentary sectional view taken on line
55 is journaled in the tube 72 and mounts thereon a worm
8-8 of FIG. 6.
gear 78 which meshes with the worm 46 and is removably
Referring to the drawings which illustrate the preferred
mounted upon the shaft 76 by suitable securing means
embodiment of the invention, the numeral 10 designates
including a securing nut 80. The shaft 76 has a reduced
a base plate or runner which preferably has an upwardly
diameter portion 82 projecting longitudinally therefrom
curved leading end 12. Spaced ?anges 14 are upturned
and extend longitudinally from the sides of the plate 16) 60 to accommodate ?ow of water therearound within the
tube to a port 84 in the tube which registers and com
‘and longitudinal inturned substantially horizontal guide
?anges 16 preferably project inwardly from the upper free
municates with the passage-forming groove 58 in the hous
margins of the ?anges 14.
ing 20.
A housing 20 is mounted
'
The groove 70 intersects a part of the bore 27 of the
with longitudinal grooves 22 at the lower side marginal 65 housing 20, as best seen in FIG. 6, so that a portion of
the tube 72 projects across the mouth of the passage 27.
portions thereof which receive the base ?anges 16 slidably
slidably upon the base plate 10, being preferably provided
to accommodate longitudinal movement of the housing 20
upon the base plate 10 for guided movement of the parts.
The housing 20 preferably mounts an end plate 24 ?xedly
A pair of longitudinally aligned spaced openings or ports
20 mounts a forwardly projecting longitudinal horizontal
88 preferably diametrically opposed to opening ‘86. A
85 and 86 are formed in the tube 72 and communicate
with the passage 27. A second set of openings or ports
secured thereto in any suitable manner as by the use of 70 is formed in the tube 72 including an opening 87 prefer~
ably diametrically opposed to opening 85 and opening
cap screws or other securing members 25. The housing
3,028,101
3
4
groove 91) is formed in the parting face of the housing 20
to provide communication between the openings ‘37 and
38. One of these openings communicates with a bore or
passage 22 which extends through the housing and
through a wall of the cylinder 26 to communicate with
the bore of cylinder 26 at the free end thereof at 94, as
occurs in predetermined relation to rotation of the
sprinkler head and produces oscillation of the piston 28
with resultant sliding of the housing 20 upon the base
plate 11).
Each of the relatively shiftable parts mounts a clamp
for gripping a guide, such as the hose, in such a manner
as to permit relative movement thereof with respect to
the guide in one direction, and to prevent such relative
movement thereof relative to the guide in the opposite
best seen in FIG. 4. The grooves 76 and 74 terminate
in reduced portions 96 which open at a side face of the
housing structure 20, 24. Reduced portions 96 commu
nicate with the tube 72 to de?ne an outlet for water dis 10 direction. Each of these clamps may be of the character
illustrated in FIG. 1, wherein the clamp shoe 130 is
charged from the operating cylinder 26, as will be ex
plained.
carried by the bracket 136, and clamp shoe 132 is
carried by the housing 20.
The housing part 24 has a passage 1%‘ extending there
In the form shown in FIGS. 1, 2 and 4, the bracket
through into communication with a chamber 102 in the
housing 20, which chamber 102 communicates with an 15 ‘36 mounting the shoe 130 also mounts a support or guide
134 preferably having a grooved upper surface, upon
which a portion of the hose 116 is supported, ‘and which
may be formed of rubber or other material providing
element 103, such as a sphere, normally urged by liquid
frictional engagement with the hose to resist sliding of
pressure toward seated position. A coupling 110 is
screw-threaded in the bore 1% and mounts a ?tting 112 20 the hose thereon when the hose is pressed ?rmly there
opening 104 in the tube 72. A valve housing tube 165
is seated in the openings 1%, 102 and mounts a valve
against. The bracket 36 also has an overhanging can
to which is adapted to be connected a coupling 114
tilevered portion 136 normally spaced above the friction
carried by the end of an elongated ?exible hose 116
pad 134 and having a shaft 138 pivoted therein and
adapted for connection with a source of water supply.
mounting an elongated arm 140 which carries the clamp
A valve element is mounted upon the shaft 82 and
preferably constitutes a cylindrical valve body 12% hav 25 shoe 1345 and extends in a direction toward the housing
2!}. The clamp shoe 130 is preferably an elongated shoe
ing a snug rotative fit in the tube 72. The cylindrical
member is cut away at one side thereof at 122 for a por
curved lengthwise thereof and also curved transversely
thereof and adapted to engage frictionally a portion of
the hose 116 regardless of the cross-sectional dimension
ter with the openings 85 and 87. At its opposite end the
member 120 is cut away for part of its length at 124 30 of that hose within the usual range of dimensions of ordi
nary garden hose and hose couplers. An elongated coil
diametrically opposite the cut-away 122 and positioned
spring 142 is anchored at one end to the shoe 130 inter
as to be adapted to register with the openings 86 and 83.
mediate the length of the latter at 144 and is anchored
The cylinder 12%? is of a diameter to substantially seal the
at its opposite end to the overhead portion 136 of the
bore of the tube '72 but to be freely rotatable therein as
35 bracket at 146 at a point below the level of the pivot
driven by the worm gear set 46, '73.
shaft 138 and preferably spaced longitudinally therefrom
It will be observed that water from the hose 116 which
so that when the spring 142 is tensioned it acts to swing
enters at the inlet 1% passes into the tube 72 at 1% when
the shoe 130 downwardly and thereby press the shoe 130
the valve 108 is unseated. Water flows in the tube to
against the hose.
the passage 58 and thence into the bore 52 of the shaft
A similar mounting for the shoe 132 relative to the
44 for discharge through the sprinkler arms 62 and 40
housing 20 is provided. Thus the housing 20 has a can
nozzles 66. The discharge from the nozzles 66 rotates
tion of its length coinciding with and adapted to regis
the shaft 44 and thus drives the worm 46 with which
worm gear 78 meshes in order to rotate the valve shaft 82.
tilevered support 15!) positioned above a recess in the
upper parts of the housing members 20 and 24 at 152
Water also flows in the tube 72 toward the valve 120
through which the hose 116 passes freely and upon which
for flow past the flat portion 122 thereof to one or the
said hose may rest in the attitude and elevation seen in
other of the openings '35’ and $7. For this purpose the
circumferential extent of the ?at 122 will be substantially
equal to the circumferential spacing between the open
ings 85 and S7, or slightly less than such circumferential
spacing, so that the inlet 10d will be in communication 50
FIG. 1 and FIG. 2, with the shoe 132 pressing down
wardly thereon. The hose clamping shoe 132 is carried
by an elongated arm 152 pivoted to the bracket 150 by
a shaft 154 and pressed downwardly by a spring 156
connected to an intermediate portion thereof and to the
bracket 15%} in the same manner described previously.
It will be observed that the shoe 132 extends from its
major portion of the time during operation of the device.
mounting bracket 15% in the same direction as the shoe
Assuming that the valve is in the position shown in FIG.
130 extends from its mounting bracket 136. Thus, as
5, water from the inlet 10% will flow through the tube
72 and the passages 87, 92 and 94 into the cylinder cham 55 viewed in FIG. 1, shoes 130 and 132 serve to permit
movement of the respective parts which carry the same
ber to act upon the piston 28 to move it toward the left,
toward the right relative to the hose, but to prevent move
as illustrated in FIG. 4, or downwardly as illustrated in
ment thereof to the left relative to the hose.
FIG. 5. Water in the cylinder which is displaced by the
Inasmuch as the parts 26) and 36 are constantly vary~
advance of the piston 23 ?ows through the opening 86
ing in their relative spacing incident to the operation of
into the tube 72 past the ?at 124 of the valve and thence
with one or the other of the passages 85 and 87 for the
flows to the outlet 96 for discharge.
As the shaft 44 rotates, the rotary valve 121} is rotated
in a predetermined timed relation determined by the
the device, as described above, it will be apparent that
when the parts are at their closest spacing, for example,
as illustrated in FIG. 1, and the operation of the power
member commences to move them in a manner to sepa
gear ratio of the worm 46 and gear 78 until such time as
the movement is su?icient to permit the ?at 122 to un 65 rate them, namely, in a manner tending to move the
member 36 to the right and the member 20 to the left
cover the port 85 and the ?at 124 to uncover the port 88
as viewed in FIG. 1, the occurrence of movement tending
while the valve body 1211 simultaneously closes the ports
to slide the member 20 to the left causes the shoe or
86 and 87. Thereupon, water from the inlet 100 ?owing
through the tube 72 will flow to the port ‘85 and into the
gripper 132 to ?rmly grasp and engage the hose 116 and
cylinder bore to act against the piston 28 in a manner to 70 prevent movement or sliding of the part 20 on the hose.
push the piston rod 33 upwardly, as viewed in FIG. 5.
Water displaced by this movement of the piston is dis
charged through passages 94 and 88 into the tube 72
past the fiat 124 and thence ?ows to the outlet 96. Thus
it will be apparent that rotation of the control valve 129 75
The part 36, however, is free to move to the right with
the shoe 13%) sliding upon the hose and, as it does so, it
carries the base 10 with it, sliding it upon the ground.
This operation continues until the parts 36 and 2t) reach
their maximum spacing and the operation of the hydraulic
3,028,101
5
mechanism of the device commences to draw the parts -
36 and 20 toward each other. This introduces a tendency
6
directly driven valve associated with the water reactance
sprinkler head for reversing the direction of operation
to move the member 36 toward the left, as viewed in
of the oscillating power member. This reduces the num
FIG. 1, and the member 20 toward the right. Move
ment of the member 36 toward the left is resisted by the
grip of the gripper 130 upon the hose, but the grip of
ber of parts to a minimum and at the same time makes
member 132 upon the hose is released. Consequently,
the member 36 takes a stationary position upon the hose,
and the member 20 is drawn forwardly along the hose.
possible reduction of the cost of construction of the
device to a minimum, and likewise reduces the weight of
the device, so that it may be handled or carried easily
and may be set and adjusted by women or by children
who are unable to exert great physical edort.
The de
The cycle of operations just described is repeated suc 10 vice is easily conditioned for operation by connecting the
same to a hose and threading the hose therethrough to
cessively as the piston 28 oscillates in cylinder 26, and
operatively present the gripper members of the relatively
this results in a progressive advance of the sprinkler along
movable parts for gripping engagement with the hose.
the hose 116 toward the end of the hose which is con
The device also possesses the advantage that it can be
The housing 20 is provided with a passage 168 pref 15 disassembled readily for adjustment or repair or for re
placement of parts.
erably extending upwardly from the chamber 1&2 and a
While the preferred embodiments of the invention have
valve actuator 162 is slidable endwise in and is rotatable
been illustrated and described, it will be understood that
in the passage 16th At its upper end the member 162
changes in the construction may be made within the
may have a laterally projecting portion 164 adapted to
engage a stop (not shown) carried by the hose 116. The 20 scope of the appended claims without departing from
the spirit of the invention.
member 162 extends into the chamber 102 and termi
I claim:
nates in a beveled face 166 positioned adjacent the
1. A sprinkler comprising a base, a housing slidable
spherical valve element 103 in one position as illustrated
on said base, a rotatable water reactance member jour
in FIG. 7. The face 166 permits the valve element 108
to seat in the valve housing 106 to close the inlet of the 25 naled in said housing, a double-acting oscillating hy
draulic power member including a part ?xedly carried
device. A position at 90 degrees to that shown in FIG. 7
by said housing and a part ?xedly carried by said base,
produces displacement or unseating of the valve. It will
a water passage in said housing communicating with said
be apparent that the rotative position or the longitudinal
reactance member and with said power member and in
position of the member 162 will determine whether the
nected to a faucet or hydrant.
in
valve 108 is open or closed, and this position can be 30 cluding an inlet and an outlet, a ?exible hose connected
to said inlet a valve rotatable in said water passage to
changed in any manner found suitable for the purpose
of stopping the operation of the device at a selected point
upon the hose 116 by providing an abutment (not shown)
control the path of flow of water through said power
member from said inlet to said outlet, valve rotating
means actuated by said water reactance member, and a
?xed upon the hose and extending in a position to engage
and trip or shift the member 162 to a valve-closing 35 pair of hose-engaging clamps carried by said base and
position when the device reaches the position at which the
said housing, respectively, each clamp accommodating
stop member is set upon the hose.
A modi?ed construction of hose-gripping member is
illustrated in FIG. 3, wherein the hose bears upon a
movement thereof relative to said base in one direction
only.
2. A sprinkler comprising a pair of relatively slidable
support 170 and is engaged by an elongated longitudi 40 parts, a double-acting oscillating hydraulic power mem
ber connecting said parts and controlling the relative
nally and transversely curved saddle type of shoe or
positions thereof, a water reactance member rotatable
gripper member 172 having a longitudinally projecting
arm 174 pivoted spaced above the hose 116 at 176 with
respect to an overhead support 178. The support 178
on one part, a reversing valve driven by said power
member and controlling the operation of said power
also serves to anchor at 180 one end of an elongated 45 member, and a pair of clamps carried by said respective
relatively shiftable parts and each gripping an elongated
leaf spring 182 preferably bent to S-shape, as shown,
guide and accommodating movement thereof relative to
and engaging at 184 the upper free end portion of the
said guide in one direction only.
shoe 172. FIG. 3 illustrates in dotted lines the manner
3. A sprinkler comprising a pair of relatively slidable
in which the gripper shoe 172 may be swung upwardly
against the action of the spring 182 for the purpose of 50 parts, a guide-gripping clamp carried by each part, each
clamp accommodating movement thereof on said guide
permitting freedom of threading of the hose in the device.
in one direction only, a double-acting extensible hydraulic
Such release of the parts is also provided with respect to
power member carried by one part and connected to the
the construction of the shoe heretofore described and
other part, a water reactance sprinkler unit carried by
Another construction of shoe and arrangement thereof 55 said one part, and means actuated by said sprinkler unit
for controlling the flow of water successively in alternate
with respect to the housing 20 is illustrated in FIG. 6,
wherein it will be seen that the housing 20, 24 is pro
paths to said power member.
vided with a longitudinally extending groove 190 in its
4. A sprinkler comprising a pair of relatively slidable
upper face into which the hose 116 is introduced. A
parts, a guide-gripping clamp carried by each part, each
gripper shoe 192, of substantially the same shape and 60 clamp accommodating movement thereof on said guide
con?guration as the shoes 130 and 172 previously de
in one direction only, a double-acting extensible hydrau
scribed, has an elongated arm 194 at one end thereof
lic power member carried by one part and connected to
which is pivoted by means of a pin 196 within a trans
the other part, a water reactance sprinkler unit carried
verse slot portion 198. A leaf spring 200 carried by the
by said one part, means actuated by said sprinkler unit
housing 20 and bearing against an intermediate portion 65 for controlling the ?ow of water successively in alternate
of the shoe serves to press the same laterally into en
paths to said power member, and guide means associated
gagement with the hose 116 to effect the required grip
with said slidable parts.
or anchorage of the hose relative to the housing. This
5. A sprinkler comprising a pair of relatively slidable
arrangement permits ready release of the hose by swing~
parts, a guide-gripping clamp carried by each part, each
ing the shoe clear of the hose and otherwise operates 70 clamp accommodating movement thereof in said guide
similarly to the grippers 130 and 172.
in one direction only, a double-acting extensible hydrau~
It will be apparent from the foregoing description that
lic power member carried by one part and connected
the device is simple by reason of the fact that it requires
to the other part, a water reactance sprinkler unit car
only one double'acting hydraulic oscillating power mem
ried by said one part, and means actuated by said
ber, and the further reason that it provides a simple 75 sprinkler unit for controlling the ?ow of water succes
identi?ed as shoes 130 and 132.
3,028,101
7
,
sively in alternate paths to said power member, said flow
control means including a passage connecting an inlet
with said sprinkler unit and with an outlet, said power
member having spaced connections with said passage
between‘ said‘ inlet and said outlet, and a valve rotatable
in said passage by said sprinkler unit to periodically
reverse the direction of ?ow of water in the connections
communicating with said power member.
6. A sprinkler as de?ned in claim 5, wherein two con
8
piston reciprocable in said cylinder, a pair of branch
passages communicating with each other and with one
end of said cylinder and communicating with said ?rst
passage at longitudinally aligned points adapted to regis
ter with said valve cut-outs, and a second pair of branch
passages‘ communicating with said ?rst passage at longi
tudinally aligned points adapted to register with said valve
cut-outs and each circumferentially spaced from a ?rst
branch passage, said second branch passages communicat
nections branch from longitudinally spaced parts of said 10 ing with each other and with the other end of said cylin
der, means for rotating said valve plug in said ?rst pas
sage and a rotatable sprinkler journaled in said housing
and communicating with said ?rst passage, said valve
in circumferentially spaced relation to said ?rst named
rotating means being driven by said sprinkler to periodi
connections and communicate with another part of said
passage and communicate with one part of said power
member, and two connections branch from said passage
power member and with each other.
7. A sprinkler as de?ned in claim 5, wherein two con
nections branch from longitudinally spaced parts of said
passage and communicate with one part of said power
15 cally alternate ?ow in said branch passage from said
inlet to said cylinder and from said cylinder to said out
let and thereby eiiect reciprocation of said piston.
11. In sprinkler, a housing having an elongated pas
sage communicating at longitudinally spaced points with
member,_and two connections branch from said passage
in circumferentially spaced relation to said ?rst named 20 an inlet and an outlet, a valve plug rotatable in said
passage between said inlet and outlet and having op
connections and communicate with another part of
positely oriented cut-outs at opposite ends thereof, a
said power member and with each other, said valve hav
cylinder, a piston reciprocable in said cylinder, a pair of
ing a cylindrical body cut away on opposite sides at the
branch passages communicating with each other and
ends thereof and adapted to register with said connections
to accommodate ?ow in selected connections and in se 25 with one end of said cylinder and communicating with
said ?rst passage at longitudinally aligned points adapted
lected directions in diiferent rotative positions thereof.
to register with said valve cut-outs, and a second pair of
8. In a sprinkler, a housing having a plurality of pas
branch passages communicating with said ?rst passage
sages therein extending from an inlet to an outlet, a
at longitudinally aligned points adapted to register with
water reactance sprinkler unit journaled in said housing
and connected with a passage in constant communica 30 said valve cut~outs and each circumferentially spaced
from a ?rst branch passage, said second branch passages
tion with said inlet, a double-acting power member hav
communicating with each other and with the other end
ing a single piston reciprocating in a cylinder, two branch
of said cylinder, means for rotating said valve plug in
passages connecting said inlet and outlet, said respective
said ?rst passage, a rotatable sprinkler journaled in said
branch passages being connected with opposite ends of
said cylinder, and a valve rotatable by said sprinkler unit 35 housing and communicating with said ?rst passage, said
sprinkler having a worm aligned with and accessible at
to alternate periodically the direction of the flow of Water
said ?rst passage, a shaft mounting said valve plug and
in said branch passages, and thereby reciprocate said
?tting with clearance in a part of said passage, and a
gear mounted on said shaft in said ?rst passage and
sage communicating at longitudinally spaced points with 40 meshing with said worm.
12. In a sprinkler, a housing having a plurality of pas
an‘ inlet and an outlet, a valve plug rotatable in said pas
sages therein extending from an inlet to an outlet, a
sage between said inlet and outlet and having oppositely
Water reactance sprinkler unit journaled in said housing
oriented cut-outs at opposite ends thereof, a cylinder, a
and connected with a passage in constant communication
piston reciprocable in said cylinder, a pair of branch
with said inlet, a double-acting power member having
passages communicating with each other and with one
a piston reciprocating in a cylinder, two branch passages
end of said cylinder and communicating with said ?rst
piston in said cylinder.
9. In a sprinkler, a housing having an elongated pas
passage at longitudinally aligned points adapted to reg
ister with said valve cut-outs, and a second pair of
branch passages communicating with said ?rst passage
at longitudinally aligned points adapted to register with
said valve cut-outs and each circumferentially spaced
from a ?rst branch passage, said second branch passages
connecting said inlet ‘and outlet, said respective branch
passages being connected with opposite ends of said cyl
inder, ‘and a valve rotatable by said sprinkler unit to
50 alternate periodically the direction of the ?ow of water
in said branch passages and thereby reciprocate said
piston in said cylinder, said outlet being spaced lengthwise
communicating with each other and with the other end
of said cylinder, and power operated means for con
of said passage from said inlet and said valve being inter
to periodical alternate ?ow in said branch passages from
said inlet to said cylinder and from said cylinder to said
ter with branch passages communicating with both ends
posed between said inlet and outlet and having oppositely
tinuously rotating said valve plug in said ?rst passage 55 oriented cut-away portions at its ends adapted to regis
of said cylinder in all operative rotative positions thereof.
outlet and thereby effect reciprocation of said piston.
10. In a sprinkler, a housing having an elongated pas
References ?tted in the tile of this patent
sage communicating at longitudinally spaced points with
UNITED STATES PATENTS
an inlet and an outlet, a valve plug rotatable in said pas
sage between said inlet and outlet and having oppositely
oriented cut-outs at opposite ends th¢r¢0f, a cylinder,~ a
2,660,472
Rice ________________ __ Nov. 24, 1953
2,661,724
Blenkle __________ __,_____ Dec. 8, 1953
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