close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2404502

код для вставки
‘- "5115.23, 1946.
o. A. KEHLE
I 2,404,502
VALVED PUMP PISTON ASSEMBLY
Filed March 6, 1945
V
32,404,502.
' Patented July 23,- 71946
NITED QSTATES PATENT?
2,404,502
.
V
‘
'1 VALVED PUMP PISTON ASSEMBLY
.
"
v, ,
'
_
Ottmaro A.. Kehle; .Van ’Nuy_s,v»,Calif., assignor to ‘ :
" Adel Precision Products Com, a. corporation of
_
California
'
'
'
-
Application-March 6, mas
"31317 1
(-7 claims. ‘ (01. i0
2 .
port ‘1 controlled by
This invention relates topumps of the manu
ally operable type as used in the hydraulic; sys
_
_
,
A suitable stuf?ng box in closes the'end of the
cylinder opposite the end ‘closed by'the BOIlStI‘LlGn
tion of the cylinder for accommodating the check
Items of aircraft, and more particularly pertains
to a valved piston assembly ior such ‘pumps and
forlsuch other uses and applications to which
saidassembly is suited.
intake check valve .8'1 and I
a discharge‘port 9.
7
valve
8,
‘
'
’ '
'
Slidable throughthe-stuf?ng box In into the 7
One of the objects of this invention is to provide
a. valved piston assembly in‘ which the piston rod,
piston proper or piston‘ head and certain novel
cylinder 6, is a pistonrod yl'l which is‘subject to
reciprocation asby'means of; a lever 12 ‘ful-v
crumedat i3 onfaibracke't l4 carried by ‘the
inter-related in such manner ‘as to greatly’ reduce
' cylinderjtherej. being ‘ailink l5; connecting the
check valve parts are constructed,_ combined and 10
the amount of machiningoperations, the produce
lever‘with'saidfrodl
servicing and upkeep costs and‘the, number of
parts compared ‘to valved piston units as hereto
fore
made.
v
~
~
to
e
V.
'
'
‘
'
>
I‘
I
In accordance with my invention apistonf'on f
pistonfhead "Seas a separate part is secured'vto‘ _'
the piston rod ilcby means of a pin ll. passed
tion costs, the amount of material employed, the
15
through aligned ‘openings l8 and [9 in‘ the piston -
-
vand rodrespectively, therebeing the usual sealing
ring groove 20in the piston‘ and sealing'ring [21
Another object of this invention is to provide
a valved piston unit such-as described which may
be quickly and easily assembled and disassembled.
a further object is to provide a valve piston
assembly such as described wherein thetpiston
rod and piston head-are separate units, con
structed and joined inga particular manner to
assure the proper alignment and action'thereof
in said groove to prevent leakage betweentithe‘ 20 cylinder wall and piston. .,
‘
‘ > As here shown the piston has
one end
'
of which is reduced andanopens
tanthrough
borezz
the outer end of the piston as an intake port“,
'
the reduction forming interiorly of the bore a
as; well as to jointly accommodatea discharge 25 valve seat 24 for a ball ‘check valve 25 freely‘,
movable in said bore. The other end'of the bore
22 is counter-bored. to for-ma socket 26 for the
squared end of the piston rods this counterboring
‘forming a shoulder 2'! adapted tobe abutted' by
check valve assembly which latter is ofisi‘mple
form by reason ofthe construction and arrange
ment of the rod and piston head.
;w
"
v
Yet another object is to provide a valved piston
assembly in which a single pin holds the piston 30 the end of said rod. Opening into this counter‘- ,
bore arev opposed. radial discharge ports 28 which
are adapted to register with corresponding ,op~
posed radial ports}!!! in the socketed end of the
rod. and piston, as Well as the check ‘valve as
sembly therein,
properly assembled relation
subject to ready disassembly and‘ replacement, of
parts of the entire unit.
I
'
‘
-
piston rod H, .the‘ports >28 and 29 being spaced
.
, With the foregoing objects in view, together 35 approximately 7-90" from‘the pin-receiving open
ings l8 and 19in the piston and rod respectively.
with such other objects and advantages as'may
'As here shown the ports 29 are spaced somewhat
subsequently appear, the invention resides in the
inwardly of the squared end of therod and the
parts and in the combination, construction and
portslg are’ correspondingly spaced from' the
arrangement of parts hereinaftergdescribedand
claimed, and illustrated by Way of example in 40 plane‘of shoulder 21, thus providing imperforate
socketed portions of the rod and piston at the
the accompanying drawing, in which:
v
shoulder 21 to; assure stability and proper align-1
Fig. 1 is a fragmentary side elevation of a pump
in which the present invention is embodied;
ment of the piston and rod. _
’
Formed inthe socketed'end of the piston?rod
Fig. 2 is a fragmentary longitudinal sectional
5 sons ‘to register with the bore 22 in the piston’
view of the pump'showingthe action of the valved - head, as a continuation oi said bore, is anaxial"
piston during one stroke‘ thereof; _
‘ “
‘
Fig. 3 is a view similar- to Fig. 2‘ ‘showinelthe '
. action of thevalvedpistonduring'thri opposite
stroke;
-
_
-
.s,
r
Fig. 4 is a cross-sectional view taken onthe line
4v—4ofFig.2.
As shown in the
" accompanying
,
drawing,_,mv
,r
H
V _
bore 3t‘ a?'ording communication ofgthe bore 22
Withv the registering ports 2a and 129;. :'
_
this
‘
connection ‘'it- is seen. that'the inner 1» or. i'slnrt jendl '
t
50
portion ‘3| of theipistonv throughwhich?portiona» .1
'thefpQrt-slz? extendiis. exteriorly'gcut ‘away, de
sirably in such a manner as to'reduce its§diameter
to‘ provide
gwhereby.
an annular
fluidm‘ay
space t?owffreelylthrough
betweeni‘it' and the ‘
improved valved piston is embodied in a, pump ' [cylinder
which includes a cylinder 5 havingiorl intake 56 thejports 28,ithus:completing‘asbyepass passage:
2,404,502
way which includes the port 23, bores 22 and '30
extending axially therethrough, said bore being
' and ports 28 and 29. ' This passageway is com
reduced at one end to define‘ a valve seat in
paratively large and direct anda?ords a large '
teriorly of the‘ bore, the other end of said bore
being enlarged to define a piston-rod receiving
volume flow per stroke of the piston. _ u
The ball check valve 25 is urged against'itsw
socket and a stop shoulder, one end portion of '
seat 24 by means of a spring 32 one end of which
said head being of smaller diameter than the re
forms a socket lforpthe ball while theiotherend
maindergof said head; and adapted to; de?ne a. U
space between said end portion and the cylinder _
seats onjg'a U-shapedi.}l;_eeper member 33 “which
straddles pin I? and seats thereon when the unit
hereof is assembled as shown inFig;~2. In strad-v
in which the head is operated, a discharge portv
extending from the exterior of said reduced end
dling the pin I? the U-shaped member 33 is held" " ' portion and opening into said enlarged portion,
.
against
displacement as .an e?ective seat and‘ as; vj of said b'ore,ra piston rod having an end portlon
V
sembly link’for the spring and valve unit, as gay .v mounted in said socket and abutting said shoul- '
whole. By. this arrangement‘ the. :pin'. l'lflholds ;
der,’ said end portion of said rod having an’ axial
‘borer’eg‘iste'ring with'the bore in said head and
the piston rod and the valve unit’ in assembled
being formed "with a discharge port aiTording
'communicationl'of said registering bores with
. is formed with a conical depression‘ ellzagainstj;
steagf‘reci
the discharge port in said head, a spring loaded
relation.
'
,
'
The inner'end of the bore
which‘ the legs of the Ueshaped member will seat
check valve assembly mounted on said bores and
when initially engaged in the bore 38 in assem
normally seating on said valve seat, and'a fas
tening pin inserted through said head and rod
bling'the unit. When the openings I8 and [9 are
in registration and the pin I‘! is inserted therein,
_for holding them together.
7 the ends of’ the pin are su?iciently tapered to
" '
'
'
2. In a structure'of the character described; 7
cause the pin to slide past the bight 'portionvof
a piston cylinder, a piston head‘having a bore
‘the LJ-shaped member between the legs thereof '
extending axially therethrough, said bore being
so that the member will seat on the pin asshowjn
reduced at one end to de?ne a valve seatiin-L
in Fig. 2 with the'legs slightly spaced from‘con
tact with the conical depression 34.
teriorly of the bore, the other end of said bore
"being enlarged to de?nera piston rod receiving
socket 'andma stop'shoulder, one‘ end portion'of
Thi_s__ ar
rangement makes for an easy ‘assembly of- the
' unit and assures the'holding of they member 33,v 30 said head being of smaller diameter than the re
spring 32Tand ball valve'in. properly assembled’ 'mainder of said head'and adapted to de?ne a
relation;
"
I
I
l,
,
.
n
7 space betweenpsa'id endportion and the cylinder-g
"It should be noted that 'the__discharge, check
in which ‘the headis operated,"a discharge port
extending from the exterior of said reduced ‘end
vvalve assembly is contained inpart in the bore
22 ‘in the piston and in the piston and in part in
portion and opening into’saidbnlarged portion
the bore 30 in the socketed end of “the piston
of said bore, a piston rod having an end portion
rod and that said assembly is shaped and dimen
mounted in said'socket and abutting said shoul
' densaid end portion of said rod'having an axial
flowthrough the by-pass passageway'when the t bore‘registering' with the bore in said head and
sioned so 'as not to objectionably obstruct the
7 ball vvalve is unseated. The socketing of the rod
40 being formed with _a discharge’ port affording or
in the piston as here provided and the manner
'in which the valve is mounted in the registering
bores of the rod and piston make for a small,
‘ compact assembly subject to easy assembling and
disassembling.
U
I
_
'On the forward stroke of the piston assembly
1 the‘ check valve‘ 25 is unseated by fluid pressure
while the intake check valve 8 is forced against
its rseat'pand ?uid will pass vfreely through port I
' 23, bores 22v and 39 and registering ports '28 and
29 thus by-passin'g the- piston and passing out
through the discharge port 9.
"
'
' v
'
1
Onthe opposite or intake stroke of the piston
the pressure of the fluid between the discharge
port’ 9 and discharge valve 25' closes the latter
- while the‘ suction action opens intake valve 8
‘thus allowing ?llidwtobe drawn into the cylin
der 6.
‘
’
I
K
i
It will be apparent that I have provided a novel
~25
communication of said registering bores with
the discharge port in said head, a spring loaded
check'valve assembly mounted on said bores and
normally‘ seating on‘ said valve seat, a fastening
pin inserted through said head and rod for hold
ing them together, said check‘valve assembly in
cluding- a‘ valve vmember, a spring abutting said
valve at one, end, and a U-shaped spring'seat '
abutting the other end'of' said spring and strad
dling said pin within the bore in said rod.‘
'
3. In a structure of the character described,
a piston cylinder, a piston head having a bore
extending axially therethrougha said bore "being
reduced at, one end to de?ne ‘a valve seat in‘
teriorly of the bore, the other end of said bore
being enlarged to de?ne a piston-rod receiving
socket and a stop shoulder, one end portion of'
said head being of smaller diameter than the re
mainder of.v said'head and-adapted to de?ne a '
valved piston assembly which will attain the ob- ‘f space between said end portion and the cylinder
ject, hereof in a particularly e?icacious manner
by'reason of the constructionfrelative arrange‘
‘ ment and cooperation of the separate piston rod
and piston head elements and the manner‘ in
which‘the discharge valve is combined therewith. '
V ' While I have shown and ‘described’ a speci?c '
embodiment of my invention, I do‘ not limit my
self to' the exact‘deta'ils of construction set‘ forth,
' ' Fand'the invention embracessuch changes, inodi- ,
?cationsand ‘equivalents of ‘the parts and their?
‘formation and arrangement‘asj come within'the
V purview of the appended claims; '
in which the ‘head-is operated',ta~:discharge port
extending from the vexterior of said reduced ‘end’
portion and opening into saidenlarged portion >
of said bore, a piston rod having an end-portion
mounted in said socket and abutting said» shoul
der, said end portion of'said rod having an ‘axial
bore registering with the bore insaid lheadfsaid
end‘ portion of said rod having a radial discharge 7
port registering’ with the discharge port’ ‘insaid ‘g l
piston head and opening into the bore ,in said
rod,-a discharge check valve of ‘smaller; diameter '
than the bore in said head adapted to seat on
said-valve seat, a spring‘urging said'discharge
1; In a structure ‘of the character deseribed, ‘ ' valve against its seatand extending into the bore
V a piston cylinder, a'rpistonl head‘having'a bore‘
insaid rod, a spring keeper'member mounted in
2,404,502
5
,
the bore in said rod, and a fastening pin extend
ing through said head and rod disposed to hold
the spring keeper member in place as well as to
secure the piston rod and piston head together.
4. In a structure of the character described,
a piston cylinder, a piston head having a bore
6
yieldingly holding the discharge valve seated, and
a removable fastening element inserted through
the reduced end portion of said piston head and
said rod to hold the rod socketed in the head and
said boresand said discharge ports in registra
reduced at one end to de?ne a valve seat in
tion.
6. In a structure of the kind described, a pis
ton cylinder, a piston head having a bore extend
remainder of said head and adapted to de?ne a
a stop shoulder, one end portion of said head
extending axially therethrough, said bore being
ing axially therethrough, said bore being reduced
teriorly of the bore, the other end of said bore
being enlarged to de?ne a piston-rod receiving 10 at one end to de?ne a valve seat interiorly of
the bore, the other end of said bore being en
socket and a stop shoulder, one end portion of
larged to vde?ne a piston-rod receiving-socket and
said head being of smaller diameter than the
being exteriorly cut away to de?ne a space be‘
space between said end portion and the cylinder
in which the head is operated, a discharge port 15 tween said end portion and the cylinder in which
the head is operated, said space extending to the
extending from the exterior of said reduced end
inner end of said cut-away portion and opening
portion and opening into said enlarged portion
into said enlarged portion of said bore,’ a piston
of said bore, a piston rod having an end portion
rod having an end portion mounted in said socket
mounted in said socket and abutting said shoul
der, said end portion of said rod having an axial 20 and abutting said shoulder, said end portion of
said rod having an axial bore- registering with
bore registering with the bore in said head, said
the bore in said head and being formed with a
end portion of said rod having a radial discharge
discharge port affording communication of said
port registering with the discharge port in said
registering bores with the discharge port in said
piston head and opening into the bore in said
head, a spring loaded check valve assembly
rod, a discharge check valve of smaller diameter
mounted on said bores and normally seating on
than the bore in said head adapted to seat on said
said valve seat, and a fastening pin inserted
valve seat, a spring urging said discharge valve
through said head and rod for holding them to
against its seat and extending into the bore in
gether.
'
said rod, a spring keeper member mounted in
'7. In a valved piston assembly, a cylinder, a
the bore in said rod, and a fastening pin extend
piston head reciprocable in said cylinder and
ing through said head and rod disposedto hold
having a bore extending axially therethrough,
the spring keeper member in place as well as to
said bore being reduced at one end to de?ne a
secure the piston rod and piston head together,
valve seat interiorly of the bore, the other end
said keeper member being U-shaped and arranged
of said bore being enlarged to de?ne a piston-rod
to straddle said pin.
,
‘
5. In a structure of the character described,
a piston cylinder, a piston head having a bore
receiving-socket and a stop shoulder, one end
, portion of said head being exteriorly cut away
to de?ne a space between said end portion and
the cylinder in which the head is operated, said
teriorly of the bore, the other end of said bore 40 space extending to the inner end of said piston
head, a discharge port leading from the ex
being enlarged to de?ne a piston-rod receiving
terior of said cut-away portion and opening into
socket and a stop shoulder, one end portion of
said enlarged portion of said bore, a piston rod
said head being of smaller diameter than the re
.having an end portion mounted in said socket
mainder of said head and adapted to de?ne a
space between said end portion and the cylinder 45 and abutting said shoulder, said end portion‘of
said rod having an axial bore registering with
in which the head is operated, a discharge port
the bore in said head, said end portion of said
extending from the exterior of said reduced end
rod having a radial discharge port registering
portion and opening into said enlarged portion of
with the discharge port in said piston head and
said bore, a piston rod having an end portion
mounted in said socket and abutting said shoul 50 opening into the bore in said rod, a discharge
check valve of smaller diameter than the bore
der, said end portion of said rod having an axial
in said head adapted to seat on said valve seat,
bore registering with the bore in said head, said
a spring urging said discharge valve against its
end portion of said rod having a radial discharge '
seat and extending into the bore in said rod, a
port registering with the discharge port in said
piston head and opening into the bore in said 55 spring keeper member mounted'in the bore in
said rod, and a fastening pin extending through
rod, a discharge check valve of smaller diameter
said head and rod disposed to hold the spring
than the bore in said head adapted to seat on
keeper member in place as well as to secure the
said valve seat, a spring urging said discharge
piston rod and piston head together.
‘
valve against its seat and extending into the
OTTMAR A. KEHLE.
bore in said rod, spring means in said bores for 60
extending axially therethrough, said bore being
reduced at one end to de?ne a valve seat in
Документ
Категория
Без категории
Просмотров
0
Размер файла
665 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа