US3893378A - Double acting fluid cylinder - Google Patents

Double acting fluid cylinder Download PDF

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Publication number
US3893378A
US3893378A US418564A US41856473A US3893378A US 3893378 A US3893378 A US 3893378A US 418564 A US418564 A US 418564A US 41856473 A US41856473 A US 41856473A US 3893378 A US3893378 A US 3893378A
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US
United States
Prior art keywords
housing
strip
cylinder
caps
aperture
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
US418564A
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English (en)
Inventor
Delbert C Hewitt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ARISTO-AIRE Inc
Sprague Aristo Aire Inc
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to US418564A priority Critical patent/US3893378A/en
Priority to CA213,360A priority patent/CA1037360A/en
Priority to DE19742453948 priority patent/DE2453948A1/de
Priority to JP49135836A priority patent/JPS598686B2/ja
Application granted granted Critical
Publication of US3893378A publication Critical patent/US3893378A/en
Assigned to ARISTO-AIRE, INC., SPRAGUE ARISTO-AIRE, INC. reassignment ARISTO-AIRE, INC. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: HEWITT, DELBERT C.
Assigned to MANUFACTURERS HANOVER TRUST COMPANY reassignment MANUFACTURERS HANOVER TRUST COMPANY SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: AMERACE CORPORATION
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/082—Characterised by the construction of the motor unit the motor being of the slotted cylinder type

Definitions

  • the cylin- 2,200,427 5/1940 Merz 92/88 x der f th inv ntion has efficient usage as the drive 2,473,430 6/1949 Hoffar 92/88 means for truck cab windows and utilizes an extruded 2,686,497 8/1954 Dodley 92/88 cylinder ortion of minimum dimension particularly Andrus X applicable for installation in truck doors to drive the 3,143,181 8/1964 Bays et al.. 92/35 x windows 3,221,610 12/1955 King et al.
  • a double acting fluid cylinder which has a laterally projecting drive arm on the piston instead of the usual axial piston rod extending through an end of the cylinder, the assembly being arranged to provide for effective sealing along the side of the cylinder through which the drive arm projects, and furthermore to provide a sealing structure which is applied under selected tension and maintained through a long time even with normal wear.
  • Another object is to provide a cylinder of the type described wherein the cylinder portion has a structure facilitating extrusion thereof for ease of manufacture and having a structure which takes up a minimum of space so as to be applicable for use as a window lift in truck cabs or the like.
  • Yet another object of the invention is to provide a cylinder of the type described having component parts which facilitate easy assembly, disassem bly and maintenance.
  • FIG. 1 is an elevational view, more or less diagrammatic, illustrating application of the present cylinder in the operation of a window in the cab door of a truck;
  • FIG. 2 is an enlarged, foreshortened elevational view of the present cylinder taken on the line 2-2 of FIG. 3, a window holding bracket of the structure being omitted for purposes of clarity;
  • FIG. 3 is a vertical sectional view in reduced scale taken on the line 33 of FIG. 2;
  • FIG. 4 is a foreshortened sectional view taken on the line 44 of FIG. 2;
  • FIGS. 5, 6, 7, and 8 are enlarged horizontal sectional views taken on the line 55, 6-6, 77 and 88 of FIG. 3, respectively, these views being turned 90 to the right relative to FIG. 3;
  • FIG. 9 is a simple diagram illustrating the operating control for the cylinder and piston assembly
  • FIG. 10 is an exploded view in perspective showing an end assembly of the cylinder.
  • FIG. 11 is an exploded view in perspective showing the components of the piston assembly.
  • the fluid cylinder assembly 12 of the present invention is shown mounted inside a truck cab door 14.
  • a truck cab door 14 Such door has a window 16 mounted for sliding up and down movement in a conventional manner, the present cylinder being mounted below the window and having connection to the window and door by means to be described.
  • the top and bottom ends of the cylinder I2 are provided with ports 18 and 20, respectively, FIGS. 2 and 9, both of which ports are connected by air lines 18a and 20a, respectively, to a suitable control valve 22 of a well known type, by means of which either port can be connected to a source of compressed fluid (not shown) and the other connected to exhaust.
  • a piston assembly designated generally by the numeral 24 is slidable up and down in the cylinder 12.
  • the cylinder assembly 12 comprises an elongated housing 26, FIGS. 38, which can be readily formed by extrusion and cut to length.
  • the housing 26 has side flanges 28 by means of which it may be secured flatwise to an inner surface of the door 14 in upright position.
  • a wall of the housing 26 has a narrow slot 30 therein which extends longitudinally the full length thereof. This slot accommodates an arm 32 of the piston assembly 24 which extends out from such assembly beyond the cylinder in a slidable arrangement.
  • a thin, semiflexible strip of material 34, preferably metal, FIGS. 2, 3, 5-8, and I0 is disposed on the inside of the housing 26 so as to cover the slot 30 in those areas not occupied by the piston 24, this strip being associated with the piston assembly in a manner to be described hereinafter.
  • the arm 32 of the piston assembly is integral with a main piston body 36, FIGS. 3, 7 and 11, and extends out through the slot 30 of the housing.
  • the lower end of the main piston body 36 has a reduced dimension projection 38 for supporting a flexible plunger-type cup 40 which has slidable sealing engagement with the inner surface of the housing 26, the projection 38 being provided with a peripheral flange 42 having locking engagement in an aperture 43 in the cup.
  • the main body portion 36 of the piston assembly is formed with a transversely extending slot 44 which as best seen in FIG. 4 decreases in depth from bottom to top.
  • a clutch brake roller 46 is carried transversely in this slot and has a center portion 48 of reduced diameter.
  • a central, longitudinally extending slot 50 crosses the transverse slot 44 and slidably accommodates a roller control bar 52.
  • This control bar has a transverse slot 54 which receives the reduced center portion 48 of the clutch brake roller 46.
  • movement of the control bar 52 controls the position of the roller 46 in the slot 44.
  • the control bar 52 has a transverse body portion 56 from which extends a reduced diameter projection 58 arranged to support a flexible plunger-like cup 60 thereon, the projection 58 having an end flange 62 and arranged to have locking engagement in an aperture 64 in the cup 60.
  • Cup 60 has a sealing engagement with the inner surface of the housing 26 in the movements of the piston assembly.
  • a pair of coil springs 68 have their upper ends engaged on round projections 70 on the lower face of the body portion 56 of the roller control bar, and the bottom ends of these springs bear against the top of the piston body 36. These springs normally keep the roller control bar spaced from the main piston body 36, and by keeping such control bar normally in raised position, they hold the clutch brake roller 46 in upper position, namely, in the full line position of FIG.
  • the upper end of the housing 26 is closed by a plug 72 and associated cap 74, FIGS. 24, and 10.
  • Plug 72 fits snugly within the housing, as does a portion of cap 74, the latter member having an end flange 76 which engages the end of the housing and which is secured thereto by a pair of screws 78 arranged to be threadedly engaged in the end of housing aligned with the flanges 28.
  • Cap 74 has a reduced end portion 80 received in a recess 82 in the plug 72.
  • An O-ring 84 is placed on the reduced end portion 80 so as to be disposed between the shoulder 85 formed by the reduced end portion 80 and the end of plug 72.
  • a pair of screws 86 extend through the cap 74 and have threaded engagement with the plug 72 to not only hold the two parts together but also to compress the O-ring and form a positive seal for the housing.
  • the other or bottom end of the housing 26 is closed by an end plug 720 and cap 74a, FIGS. 2, 3, 4 and 8, the same as described in connection with that described in connection with the top end, the corresponding parts being designated by the same reference numeral but additionally with an a.
  • the bottom end cap 7411, as well as its associated plug 72a, FIGS. 2 and 3, has a longitudinal side groove 88 in which an adjacent end portion of the strip 34 lies, such groove being of substantially the same width as the strip 34 and a depth corresponding to the thickness of the said strip for effective sealing with the O-ring 84a.
  • the strip 34 at this lower end has an aperture 90, and an anchor pin 92 is mounted in the end cap 74a arranged for engagement in the aperture 90 to provide an anchor for one end of the strip.
  • the end cap 74 at the upper end of the housing 26, FIGS. 3 and 10 has a top groove 96 which starts intermediate the sides of the top surface and leads in a deepening dimension toward the side at which the strip 34 is disposed, the side surface of the cap 74 and plug 72 also having a groove 88 as in the bottom cap 740 and plug 72a for receiving the strip 34.
  • a leaf spring lever 100 Secured on the end of the cap 74 by means of the screws 78 is a leaf spring lever 100 have a widened body portion 102 for receiving the screws and having a tongue portion 104 an end portion of which is slightly off-set from the plane of the body portion but normally parallel thereto.
  • the end of the strip 34 adjacent to the lever 102 has an aperture 105 arranged to receive an end portion of the tongue 104 of the lever 100.
  • the arrangement is such that in the assembly of this end of the housing the body portion 102 of lever 100 is clamped flat on the end of cap 74 by the screws 78 and the tongue 104 must be bent down in the groove 96 for reception in the aperture 105.
  • the lever 100 applies a constant tensioning force on the strip 34 even with some wear of the parts, thus maintaining a good sealing disposition with the slot 30.
  • a channel 106 is provided in the face of the piston assembly for receiving the strip 34, this channel being of suitable dimension to provide a sliding association with the strip.
  • This channel is also provided in the end cups 40 and 60 and also in the flange 56 of the roller control bar 52 and is deepened at 1060 near the mid section of the main piston body 36 to enable the strip 34 to pass beneath a cross bar 360 formed by the deepened portion of the channel.
  • the flexible strip 34 is thus in contact with the wall of the housing along the inside of the slot 30 at all times over the entire length of the slot except at the particular location on the piston where it is diverted inwardly in the mid section of the piston so as to pass under the cross bar 360.
  • a sealing engagement is thus provided along the slot 30 in all places except in the area where the piston is disposed, the said area where the piston is disposed being sealed at the slot by the piston itself.
  • the piston assembly can move up and down in the housing with effective sealing in the entire housing.
  • the double acting fluid cylinder is illustrated in FIGS. 1 and 3 as comprising a drive for a truck cab window wherein the arm 32 is engaged in an aperture 107, FIG. 3, of a bracket 108 comprising a window lift bracket having an upper channel portion 110 arranged to receive the door glass 16. Arm 32 is notched top and bottom at 32a for reception in the aperture, such notched portion serving to hold the bracket 108 in spaced relation from the cylinder housing 26 so that it will not rub on the housing.
  • a stop 112 is secured to the front wall of the housing 26 adjacent the lower end thereof.
  • This stop has rearwardly extending arms 1 l4 and right angle tabs 116 through which rivets 118 extend to secure the stop to the flange portions 28 of the housing 26.
  • the stop 112 is selectively located to limit the downward movement of the piston as determined by the desired range of travel of such piston. The upward travel of the piston is limited by engagement of such piston with the upper plug 72.
  • the slot 30 in the cylinder housing 26 have a dust cover, and for this purpose a thin flexible strip 120, FIGS. 2-8, is secured as by adhesive 122 in a longitudinal recess 124 in the outer face of said housing.
  • the strip is slit longitudinally at 126 along the path of travel of arm 32, and such arm moves through such slit with the flexible material of the strip closing and opening closely thereto to keep out dust.
  • a double acting fluid cylinder which drives through a side of the cylinder rather than through an end piston rod and which by its structure has effective sealing through the side drive opening.
  • Such scaling is accomplished, even though slight wear of the parts occurs, by the tensioning lever 102 operating on the strip 34.
  • the present device by its construction also is readily assembled and disassembled and easily maintained.
  • a double acting fluid cylinder comprising an elongated cylinder housing having opposite ends, a plug fitted snugly in each end of said housing having an outer end edge and a central recess, a cap disposed at each end of said housing, an end flange on said caps abutted against respective ends of said housing, screw means extending through said flange and engageable with said housing to secure said caps on the housing, a reduced end portion on said caps extending into the recesses of respective plugs, said reduced end portions forming an inwardly directed shoulder on said caps, a resilient seal ing ring between the shoulders of said caps and the outer edges of respective plugs, screw means extending through said caps and engageable with respective plugs for securing the caps and plugs together and also to compress said sealing rings for accomplishing a positive seal between said cap and said housing, a pair of ports located at opposite ends of said housing respectively to serve alternately as inlet and outlet ports, a piston assembly slidably mounted in said cylinder housing, means defining a slot extending longitudinally along one
  • said anchoring means includes an anchored end aperture in said strip, and an anchor pin on said housing in hooking engagement with said anchored end aperture to removably hold said strip for tensioning by said leaf spring lever.
  • the double acting cylinder of claim 1 including a flexible dust cover on the exterior of said housing covering said slot and mounted by securement means, said cover having a longitudinal slit through which said arm moves.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
US418564A 1973-11-23 1973-11-23 Double acting fluid cylinder Expired - Lifetime US3893378A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US418564A US3893378A (en) 1973-11-23 1973-11-23 Double acting fluid cylinder
CA213,360A CA1037360A (en) 1973-11-23 1974-11-08 Double acting fluid cylinder
DE19742453948 DE2453948A1 (de) 1973-11-23 1974-11-14 Doppelt wirkende kolbenzylindereinrichtung
JP49135836A JPS598686B2 (ja) 1973-11-23 1974-11-25 複動流体シリンダ−

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US418564A US3893378A (en) 1973-11-23 1973-11-23 Double acting fluid cylinder

Publications (1)

Publication Number Publication Date
US3893378A true US3893378A (en) 1975-07-08

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ID=23658658

Family Applications (1)

Application Number Title Priority Date Filing Date
US418564A Expired - Lifetime US3893378A (en) 1973-11-23 1973-11-23 Double acting fluid cylinder

Country Status (4)

Country Link
US (1) US3893378A (en, 2012)
JP (1) JPS598686B2 (en, 2012)
CA (1) CA1037360A (en, 2012)
DE (1) DE2453948A1 (en, 2012)

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4080877A (en) * 1974-10-09 1978-03-28 Defries Jan Richard Working cylinder for pneumatic or hydraulic pressure media
US4137827A (en) * 1977-05-18 1979-02-06 Hewitt Delbert C Double acting fluid operated piston cylinder assembly
DE2904190A1 (de) * 1979-02-05 1980-08-07 Delbert C Hewitt Doppelseitig wirkende kolben/zylinderanordnung
US4373427A (en) * 1980-01-31 1983-02-15 Tol-O-Matic, Inc. Fluid pressure cylinder
WO1983002306A1 (en) * 1981-12-22 1983-07-07 Mecman Ab Device at a pressure fluid cylinder without piston rod
US4419924A (en) * 1979-11-08 1983-12-13 Oskar Peter Brake assembly for fluid operated piston and cylinder device
US4481869A (en) * 1982-05-14 1984-11-13 Greenco Corp. Fluid operated device with improved sealing means
JPS6271404U (en, 2012) * 1985-10-23 1987-05-07
US4669365A (en) * 1984-03-24 1987-06-02 Kurt Stoll Slide-like drive means
US4682535A (en) * 1984-03-30 1987-07-28 Kurt Stoll Guide housing for the linearly moving output element of a cylinder actuator
US4891908A (en) * 1987-03-24 1990-01-09 Aquilina Anthony G Pneumatic door opener
US4998459A (en) * 1989-09-22 1991-03-12 Blatt John A Rodless fluid actuated motor with improved sealing characteristics
US5022499A (en) * 1989-02-28 1991-06-11 Hygrama Ag Axially slit pressure cylinder with brake means
US5040332A (en) * 1988-07-08 1991-08-20 Aquilina Anthony G Pneumatic door operator
US5125789A (en) * 1990-01-02 1992-06-30 Peerless Automation Molded parts removal and transfer robot
DE9113492U1 (de) * 1991-10-30 1993-03-04 Robert Bosch Gmbh, 7000 Stuttgart Einfach wirkender pneumatischer Arbeitszylinder
US5205204A (en) * 1990-07-17 1993-04-27 Mannesmann Aktiengesellschaft Working cylinder without piston rod and with a braking device, in particular for compressible media
USD380042S (en) * 1995-06-26 1997-06-17 Yuda Lawrence F Air cylinder housing
US5988042A (en) * 1997-10-24 1999-11-23 Phd, Inc. Rodless cylinder with internal bearings
US6098521A (en) * 1997-09-24 2000-08-08 Smc Kabushiki Kaisha Rodless cylinder
EP1031732A2 (en) 1999-02-22 2000-08-30 Howa Machinery Limited A rodless cylinder
US6257123B1 (en) 1997-10-24 2001-07-10 Phd, Inc. Rodless slides
EP0884485B1 (en) * 1997-06-11 2005-11-16 Howa Machinery, Ltd. A rodless power cylinder
WO2006048953A1 (ja) 2004-11-02 2006-05-11 Howa Machinery, Ltd. マグネット式ロッドレスシリンダ
WO2006098062A1 (ja) 2005-03-15 2006-09-21 Howa Machinery, Ltd. マグネット式ロッドレスシリンダ

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4664020A (en) * 1981-06-25 1987-05-12 Proma Produkt-Und Marketing Gesellschaft M.B.H. Piston-cylinder structure
DE3124878C1 (de) * 1981-06-25 1982-12-09 Kaiser, Siegmund H., Ing.(grad.), 7440 Nürtingen Druckmittelzylinder
DE3504269A1 (de) * 1985-02-08 1986-08-21 ORIGA GmbH Pneumatik, 7024 Filderstadt Druckmittelzylinder
JPH0433451Y2 (en, 2012) * 1985-05-15 1992-08-11
JPS6285704U (en, 2012) * 1985-11-15 1987-06-01
DE3619473A1 (de) * 1986-06-10 1987-12-17 Knorr Bremse Ag Druckmittelgetriebener, kolbenstangenloser arbeitszylinder
JP2548002Y2 (ja) * 1995-05-31 1997-09-17 豊和工業株式会社 ガイド付ロッドレスシリンダ装置
JP3160891B2 (ja) * 1997-04-29 2001-04-25 豊和工業株式会社 シ−ルバンドの取付構造
JP5009106B2 (ja) * 2007-09-12 2012-08-22 株式会社アイ・アンド・ティー 直線運動体の制動装置

Citations (11)

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US1431084A (en) * 1921-01-19 1922-10-03 Ray E Anglemyer Footboard attachment for automobiles
US1903168A (en) * 1931-03-20 1933-03-28 Zero Ice Corp Pressure vessel for solid carbon dioxide
US2200427A (en) * 1937-04-22 1940-05-14 Merz Francesco Propeller device
US2473430A (en) * 1945-05-19 1949-06-14 Le Roi Company Piston coupling mechanism
US2686497A (en) * 1950-05-29 1954-08-17 Rhodes Lewis Co Fluid pressure actuated mechanism
US2835404A (en) * 1956-08-13 1958-05-20 Smith Corp A O Pressure vessel
US3143181A (en) * 1961-12-06 1964-08-04 Continental Oil Co Seismic transducer and cushioning device therefor
US3221610A (en) * 1964-01-13 1965-12-07 Hewitt Clutch type piston locking means
US3278153A (en) * 1963-06-04 1966-10-11 Gorman Rupp Ind Inc Double action pinch tube valve
US3414316A (en) * 1966-10-13 1968-12-03 Williams Oscar Stanley Closure for tractor cabs
US3549244A (en) * 1969-01-27 1970-12-22 Us Navy Precision prism oscillating mechanism

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2486615A (en) * 1948-04-23 1949-11-01 Livingaire Inc Piston and cylinder construction
US2686493A (en) * 1952-11-14 1954-08-17 John E Neiswanger Tire deflation indicator
DE1044748B (de) * 1957-08-30 1958-11-27 Demag Ag Hydraulischer Langhubantrieb fuer Arbeitsmaschinen, z. B. Stossbaenke
SE326376B (en, 2012) * 1968-11-15 1970-07-20 Mecmatic Ab
DE2139504C3 (de) * 1971-08-06 1979-06-28 Fa. J. Eberspaecher, 7300 Esslingen Heizgerät für mobile Einheiten

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1431084A (en) * 1921-01-19 1922-10-03 Ray E Anglemyer Footboard attachment for automobiles
US1903168A (en) * 1931-03-20 1933-03-28 Zero Ice Corp Pressure vessel for solid carbon dioxide
US2200427A (en) * 1937-04-22 1940-05-14 Merz Francesco Propeller device
US2473430A (en) * 1945-05-19 1949-06-14 Le Roi Company Piston coupling mechanism
US2686497A (en) * 1950-05-29 1954-08-17 Rhodes Lewis Co Fluid pressure actuated mechanism
US2835404A (en) * 1956-08-13 1958-05-20 Smith Corp A O Pressure vessel
US3143181A (en) * 1961-12-06 1964-08-04 Continental Oil Co Seismic transducer and cushioning device therefor
US3278153A (en) * 1963-06-04 1966-10-11 Gorman Rupp Ind Inc Double action pinch tube valve
US3221610A (en) * 1964-01-13 1965-12-07 Hewitt Clutch type piston locking means
US3414316A (en) * 1966-10-13 1968-12-03 Williams Oscar Stanley Closure for tractor cabs
US3549244A (en) * 1969-01-27 1970-12-22 Us Navy Precision prism oscillating mechanism

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4080877A (en) * 1974-10-09 1978-03-28 Defries Jan Richard Working cylinder for pneumatic or hydraulic pressure media
US4137827A (en) * 1977-05-18 1979-02-06 Hewitt Delbert C Double acting fluid operated piston cylinder assembly
DE2904190A1 (de) * 1979-02-05 1980-08-07 Delbert C Hewitt Doppelseitig wirkende kolben/zylinderanordnung
US4419924A (en) * 1979-11-08 1983-12-13 Oskar Peter Brake assembly for fluid operated piston and cylinder device
US4373427A (en) * 1980-01-31 1983-02-15 Tol-O-Matic, Inc. Fluid pressure cylinder
WO1983002306A1 (en) * 1981-12-22 1983-07-07 Mecman Ab Device at a pressure fluid cylinder without piston rod
US4481869A (en) * 1982-05-14 1984-11-13 Greenco Corp. Fluid operated device with improved sealing means
US4669365A (en) * 1984-03-24 1987-06-02 Kurt Stoll Slide-like drive means
US4682535A (en) * 1984-03-30 1987-07-28 Kurt Stoll Guide housing for the linearly moving output element of a cylinder actuator
JPS6271404U (en, 2012) * 1985-10-23 1987-05-07
US4891908A (en) * 1987-03-24 1990-01-09 Aquilina Anthony G Pneumatic door opener
US5040332A (en) * 1988-07-08 1991-08-20 Aquilina Anthony G Pneumatic door operator
US5022499A (en) * 1989-02-28 1991-06-11 Hygrama Ag Axially slit pressure cylinder with brake means
US4998459A (en) * 1989-09-22 1991-03-12 Blatt John A Rodless fluid actuated motor with improved sealing characteristics
US5125789A (en) * 1990-01-02 1992-06-30 Peerless Automation Molded parts removal and transfer robot
US5205204A (en) * 1990-07-17 1993-04-27 Mannesmann Aktiengesellschaft Working cylinder without piston rod and with a braking device, in particular for compressible media
DE9113492U1 (de) * 1991-10-30 1993-03-04 Robert Bosch Gmbh, 7000 Stuttgart Einfach wirkender pneumatischer Arbeitszylinder
USD380042S (en) * 1995-06-26 1997-06-17 Yuda Lawrence F Air cylinder housing
EP0884485B1 (en) * 1997-06-11 2005-11-16 Howa Machinery, Ltd. A rodless power cylinder
US6098521A (en) * 1997-09-24 2000-08-08 Smc Kabushiki Kaisha Rodless cylinder
US6257123B1 (en) 1997-10-24 2001-07-10 Phd, Inc. Rodless slides
US5988042A (en) * 1997-10-24 1999-11-23 Phd, Inc. Rodless cylinder with internal bearings
US6253660B1 (en) 1999-02-22 2001-07-03 Howa Machinery, Ltd. Rodless cylinder
EP1031732A2 (en) 1999-02-22 2000-08-30 Howa Machinery Limited A rodless cylinder
WO2006048953A1 (ja) 2004-11-02 2006-05-11 Howa Machinery, Ltd. マグネット式ロッドレスシリンダ
US20080000347A1 (en) * 2004-11-02 2008-01-03 Naoki Minowa Magnet Type Rodless Cylinder
US7644648B2 (en) 2004-11-02 2010-01-12 Howa Machinery, Ltd. Magnet type rodless cylinder
WO2006098062A1 (ja) 2005-03-15 2006-09-21 Howa Machinery, Ltd. マグネット式ロッドレスシリンダ
US20080141856A1 (en) * 2005-03-15 2008-06-19 Akiyoshi Horikawa Magnet Type Rodless Cylinder
US7669515B2 (en) 2005-03-15 2010-03-02 Howa Machinery, Ltd. Magnet type rodless cylinder

Also Published As

Publication number Publication date
DE2453948A1 (de) 1975-05-28
CA1037360A (en) 1978-08-29
JPS598686B2 (ja) 1984-02-27
JPS5089775A (en, 2012) 1975-07-18

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Owner name: ARISTO-AIRE, INC., OREGON

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:HEWITT, DELBERT C.;REEL/FRAME:005465/0099

Effective date: 19880421

Owner name: SPRAGUE ARISTO-AIRE, INC., OREGON

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:HEWITT, DELBERT C.;REEL/FRAME:005465/0099

Effective date: 19880421

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Effective date: 19900731