US3892166A - Piston and cylinder apparatus arranged for cleaning - Google Patents

Piston and cylinder apparatus arranged for cleaning Download PDF

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Publication number
US3892166A
US3892166A US369303A US36930373A US3892166A US 3892166 A US3892166 A US 3892166A US 369303 A US369303 A US 369303A US 36930373 A US36930373 A US 36930373A US 3892166 A US3892166 A US 3892166A
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US
United States
Prior art keywords
piston
cylinder
inlet
annular
outlet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US369303A
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English (en)
Inventor
Bjorn-Olow Johansson
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Alfa Laval AB
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Alfa Laval AB
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Publication date
Application filed by Alfa Laval AB filed Critical Alfa Laval AB
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B3/00—Packaging plastic material, semiliquids, liquids or mixed solids and liquids, in individual containers or receptacles, e.g. bags, sacks, boxes, cartons, cans, or jars
    • B65B3/26—Methods or devices for controlling the quantity of the material fed or filled
    • B65B3/30—Methods or devices for controlling the quantity of the material fed or filled by volumetric measurement
    • B65B3/32—Methods or devices for controlling the quantity of the material fed or filled by volumetric measurement by pistons co-operating with measuring chambers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/04—Special measures taken in connection with the properties of the fluid
    • F15B21/044—Removal or measurement of undissolved gas, e.g. de-aeration, venting or bleeding
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F11/00—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it
    • G01F11/02—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers which expand or contract during measurement
    • G01F11/04—Apparatus requiring external operation adapted at each repeated and identical operation to measure and separate a predetermined volume of fluid or fluent solid material from a supply or container, without regard to weight, and to deliver it with measuring chambers which expand or contract during measurement of the free-piston type

Definitions

  • ABSTRACT Sweden Primary Examiner-Martin P. Schwadron [73] Assignee: Alia-Laval AB, Tumba, Sweden Assistant ExaminerAbraham Hershkovitz Filed: June I973 Attorney, Agent, or Firm-Cyrus S. Hapgood ⁇ 21 Appl. No.: 369,303 [57] ABSTRACT The cylinder has at least one opening on each side of Fol-mg Appl'cauon Pnonty Data the piston, these openings serving as inlet and outlet June for a liquid; and at each end position of the piston, the
  • - cylinder has an annular zone in which the internal di- [52] US. Cl. 91/454; 92/78; 92/80; ameter f h u d along a substantial pan of its 92/82; 92/372 92/169 periphery is larger than the diameter of annular seals [51 Int. Cl.
  • John 91/454 can be effectively flushed with Cleaning liquid Without 1,294,061 2/1919 Dexter 91/401 X disassembling th pist y nd r m ination. 2.6l6,522 ll/l952 Van Heeckeren et al; 92/80 X 2,711,157 6/l955 Halward 92/162 R x 7 Claims, 3 Drawing Flames 22 2O 2'!
  • the present invention relates to an apparatus com prising a piston adapted to reciprocate in a cylinder between two end positions and having annular sealing means at each of its ends, the cylinder being provided with at least one opening on each side of the piston which serves as inlet and outlet for liquid.
  • the piston may be reciprocated within the cylinder either by a piston rod connected therewith or by means of the liquid which is supplied to the cylinder, by causing the liquid pressure to act alternately on opposite sides of the piston.
  • Apparatus of this kind are used in different fields, as for measuring liquids (see, for instance, French Pat. No. 1,595,934).
  • Within the food stuff industry they have been used to a relatively limited extent, however, as they are very difficult to clean. it is especially difficult to obtain a satisfactory cleaning of the piston sealing means and the grooves therefor in the piston. Such cleaning has hitherto required removal of the piston from the cylinder.
  • the principal object of the present invention is to provide an apparatus of this type which can be adequately cleaned without disassembling it.
  • the inside of the cylinder is provided at each end position of the piston with an annular zone in which the internal diameter of the cylinder along a substantial part of its periphery is greater than the diameter of the piston sealing means.
  • Each of these zones is connected with the respective cylinder opening and is positioned so that when the piston is in either end position, the piston seal nearest the corre sponding cylinder end is located opposite a said zone while the other piston seal is in sealing engagement with the inside of the cylinder.
  • the piston seals will be uncovered, one at a time, when the piston reaches its end positions.
  • This enables an effective cleaning of the seals without impairing the normal functioning of the apparatus, as there will always be one seal in engagement with the inside of the cylinder.
  • the cylinder has a annular recess in each of the said zones, so that each of the piston seals will be uncovered around its entire periphery in the corresponding end position of the piston.
  • the cylinder openings on both sides of the piston are preferably situated in the said annular cylinder recesses.
  • the inlets for liquid on both sides of the piston may open tangentially into the cylinder.
  • the apparatus must then have separate inlets and outlets on both sides of the pistion, which are arranged to be closed and opened by means of suitable valves. Further, the apparatus must have means arranged to operate these valves in such a way that the inlet and the outlet on one side of the piston are kept open, while the inlet and outlet on the other side of the piston are kept closed.
  • the piston On cleaning, the piston may then be maintained in one end position while cleaning liquid is caused to flow through the cylinder by way of the inlet and the outlet in this part of the cylinder, after which the piston may be moved to and be maintained in the other end position while cleaning liquid is caused to flow through the cylinder by way of the inlet and the outlet in the opposite part of the latter.
  • An effective cleaning of the piston seals which will be uncovered one at a time at the respective end positions, will then be obtained. If required, cleaning of this kind may be combined with cleaning of the first-described kind with the piston reciprocating within the cylinder.
  • the piston is pro vided with a recess between its two seals, the piston recess and each of the said zones in the cylinder having an axial extension such that the piston recess will come into communication with the difierent zones in the respective end positions of the piston.
  • FIG. 1 is a flow diagram of a system including an apparatus according to the invention
  • FIG. 2 is a longitudinal sectional view of one form of apparatus according to the invention
  • H6. 3 is a cross-sectional view along the line 11] III in FIG. 2
  • a cylinder 1 contains a piston 2 reciprocable therein between two end positions.
  • An inlet conduit 3 opens into the cylinder and an outlet conduit 4 leads from the cylinder at one side of the piston 2, and an inlet conduit 5 opens into the cylinder and an outlet conduit 6 leads from the cylinder at the other side of the piston.
  • the two inlet conduits 3 and 5 start from a common conduit 7, and the two outlet conduits 4 and 6 open into a common conduit 8.
  • the inlet and outlet conduits are shut-off valves 9-12 which, via connections 13-16, are connected to a common control unit 17.
  • the conduit 7, common to the inlet conduits, leads from a container 18.
  • a pump 19 in the conduit 7 is arranged to pump liquid from the container 18 to and through the cylinder 1.
  • FIG. 2 the cylinder 1 and the piston 2 are shown in detail. Parts of the inlet conduits 3, and outlet conduits 4, 6 are also shown in this figure.
  • the cylinder 1 in the areas for the two end positions of the piston 2 has zones and 21 specially formed with somewhat larger inner diameter than the other part of the cylinder. These zones or recesses 20 and 21 communicate with the inlet and outlet at the respective ends of the cylinder.
  • the piston 2 has special grooves 22 and 23 at its ends which receive annular seals 24 and 25, respectively.
  • the piston 2 has evenly distributed around its periphery, as can be seen from FIG. 3, three recesses 26, one of which is shown also in FIG. 2. The recesses 26 are situated between the seals 24 and 25. As can be seen from FIG.
  • the piston recesses 26 and each of the cylinder recesses 20 and 21 have an axial extension such that the piston recesses 26 will come into communication with the different cylinder recesses 20 and 21 in the respective end positions of the piston.
  • the piston recesses 26 serve to prevent gases from accumulating in the lower part of the cylinder.
  • any gas bubbles present in the liquid below the piston will be collected in the piston recesses 26, wherein they accompany the piston 2 to its upper end position where they leave the recessed 26, which are then in communication with the outlet conduit 4 through the cylinder recess 20.
  • valves 9-12 may be controlled in the same way as when the apparatus is in normal operation, the piston 2 then being reciprocated by the pressure of cleaning liquid supplied to the cylinder.
  • the opening and closing movements of the valves may instead be controlled so that the piston will remain first in one and then in the other of its end positions, while cleaning liquid flows through the part of the cylinder where the piston is situated at the moment.
  • the valves ll and 12 are kept closed so that the liquid trapped in the lower part of the cylinder prevents the piston from moving downwards, while the valves 9 and 10 are kept open so that cleaning liquid flows through the part of the cylinder situated above the piston.
  • the cleansing of the piston seals and their grooves may be especially effective if the inlet conduits 3 and 5 open tangentially into the cylinder 1.
  • Apparatus comprising a cylinder, a piston adapted to reciprocate in the cylinder between two end positions and having an annular seal at each end of the piston, whereby said seals are interposed between interior portions of the cylinder on opposite sides of the piston, the cylinder having at least one opening on each side of the piston, said openings serving as inlet and outlet for liquid, and means for controlling the flow of liquid into and out of the cylinder through said openings, the inside of the cylinder having at each end position of the piston an annular zone in which the internal diameter of the cylinder along a substantial part of its periphery is larger than the outer diameter of said annular seals, said zones communicating with respective cylinder openings and being located so that when the piston is in each end position, the piston seal nearest the corresponding cylinder end is opposite the corresponding zone while the other piston seal is in sealing engagement with the inside of the cylinder.
  • said cylinder openings include a separate inlet and a separate outlet on each side of the piston, said means including a valve in each of said inlets and outlets and being operable, when the piston is in either end position, to maintain the inlet and outlet open on the side of the piston adjacent said end position while maintaining the inlet and outlet on the other side of the piston closed.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Reciprocating Pumps (AREA)
US369303A 1972-06-19 1973-06-12 Piston and cylinder apparatus arranged for cleaning Expired - Lifetime US3892166A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7208043A SE373206B (it) 1972-06-19 1972-06-19

Publications (1)

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US3892166A true US3892166A (en) 1975-07-01

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Family Applications (1)

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US369303A Expired - Lifetime US3892166A (en) 1972-06-19 1973-06-12 Piston and cylinder apparatus arranged for cleaning

Country Status (10)

Country Link
US (1) US3892166A (it)
JP (1) JPS4957862A (it)
AU (1) AU454014B2 (it)
CA (1) CA983315A (it)
DE (1) DE2331161A1 (it)
FR (1) FR2190225A5 (it)
GB (1) GB1402475A (it)
IT (2) IT989285B (it)
NL (1) NL7307950A (it)
SE (1) SE373206B (it)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4432556A (en) * 1983-06-01 1984-02-21 The United States Of America As Represented By The Secretary Of The Navy Piston sealing arrangement for a cryogenic refrigerator
US4716732A (en) * 1985-05-10 1988-01-05 Navistar International Transportation Corp. Vehicle hydraulic actuating system
US4726571A (en) * 1986-03-17 1988-02-23 Lear Siegler, Inc. Height control valve with spring return actuator
US5724080A (en) * 1993-12-20 1998-03-03 Canon Kabushiki Kaisha Non-sticking pump for use in recovery of ink jet recording apparatus
US20070199394A1 (en) * 2004-05-07 2007-08-30 Dr. Ing H.C.F. Porsche Aktiengesellschaft Hydraulic Transmission Actuator
US20110176942A1 (en) * 2008-10-29 2011-07-21 Panasonic Carporation Sealed compressor
US20120183419A1 (en) * 2009-10-27 2012-07-19 Panasonic Corporation Hermetic compressor
EP3853536A4 (en) * 2018-10-24 2022-03-02 Qingdao Haier Refrigerator Co., Ltd. PRECISE FILLING DISTRIBUTION SYSTEM FOR ONE APPLIANCE

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1166916A (en) * 1979-09-04 1984-05-08 Gordon E. Smith Metering device for biological fluids
FR2610717B1 (fr) * 1987-02-11 1993-07-30 Lesieur Cotelle Doseur volumetrique electromagnetique

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US352633A (en) * 1886-11-16 Reoipkooating engine
US1294061A (en) * 1918-01-30 1919-02-11 Frank Robertson Dexter Automatic blow-off device.
US2616522A (en) * 1948-04-27 1952-11-04 Philips Lab Inc Lubricating means for reciprocatory member in a high-pressure chamber and blowoff means therefor
US2711157A (en) * 1953-05-13 1955-06-21 Halward Folke Piston lock for use in die casting and molding machines
US2899248A (en) * 1959-08-11 Hydraulic pump
US2902007A (en) * 1957-05-31 1959-09-01 Allis Chalmers Mfg Co Cylinder piston assembly with pressure relieving means
US3004524A (en) * 1960-07-20 1961-10-17 Austin Hydraulic cylinder and piston arrangement

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US352633A (en) * 1886-11-16 Reoipkooating engine
US2899248A (en) * 1959-08-11 Hydraulic pump
US1294061A (en) * 1918-01-30 1919-02-11 Frank Robertson Dexter Automatic blow-off device.
US2616522A (en) * 1948-04-27 1952-11-04 Philips Lab Inc Lubricating means for reciprocatory member in a high-pressure chamber and blowoff means therefor
US2711157A (en) * 1953-05-13 1955-06-21 Halward Folke Piston lock for use in die casting and molding machines
US2902007A (en) * 1957-05-31 1959-09-01 Allis Chalmers Mfg Co Cylinder piston assembly with pressure relieving means
US3004524A (en) * 1960-07-20 1961-10-17 Austin Hydraulic cylinder and piston arrangement

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4432556A (en) * 1983-06-01 1984-02-21 The United States Of America As Represented By The Secretary Of The Navy Piston sealing arrangement for a cryogenic refrigerator
US4716732A (en) * 1985-05-10 1988-01-05 Navistar International Transportation Corp. Vehicle hydraulic actuating system
US4726571A (en) * 1986-03-17 1988-02-23 Lear Siegler, Inc. Height control valve with spring return actuator
US5724080A (en) * 1993-12-20 1998-03-03 Canon Kabushiki Kaisha Non-sticking pump for use in recovery of ink jet recording apparatus
US20070199394A1 (en) * 2004-05-07 2007-08-30 Dr. Ing H.C.F. Porsche Aktiengesellschaft Hydraulic Transmission Actuator
US7469625B2 (en) * 2004-05-07 2008-12-30 Dr. Ing. H.C.F. Porsche Aktiengesellschaft Hydraulic transmission actuator
US20110176942A1 (en) * 2008-10-29 2011-07-21 Panasonic Carporation Sealed compressor
US20120183419A1 (en) * 2009-10-27 2012-07-19 Panasonic Corporation Hermetic compressor
EP3853536A4 (en) * 2018-10-24 2022-03-02 Qingdao Haier Refrigerator Co., Ltd. PRECISE FILLING DISTRIBUTION SYSTEM FOR ONE APPLIANCE

Also Published As

Publication number Publication date
JPS4957862A (it) 1974-06-05
IT992575B (it) 1975-09-30
NL7307950A (it) 1973-12-21
SE373206B (it) 1975-01-27
GB1402475A (en) 1975-08-06
AU454014B2 (en) 1974-10-17
FR2190225A5 (it) 1974-01-25
AU5587273A (en) 1974-10-17
CA983315A (en) 1976-02-10
IT989285B (it) 1975-05-20
DE2331161A1 (de) 1974-01-17

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