BE672104A - - Google Patents
Info
- Publication number
- BE672104A BE672104A BE672104DA BE672104A BE 672104 A BE672104 A BE 672104A BE 672104D A BE672104D A BE 672104DA BE 672104 A BE672104 A BE 672104A
- Authority
- BE
- Belgium
Links
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
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/26—Locking mechanisms
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B9/00—Tables with tops of variable height
- A47B9/10—Tables with tops of variable height with vertically-acting fluid cylinder
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
- A47C3/20—Chairs or stools with vertically-adjustable seats
- A47C3/30—Chairs or stools with vertically-adjustable seats with vertically-acting fluid cylinder
-
- 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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/06—Servomotor systems without provision for follow-up action; Circuits therefor involving features specific to the use of a compressible medium, e.g. air, steam
- F15B11/072—Combined pneumatic-hydraulic systems
-
- 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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/06—Servomotor systems without provision for follow-up action; Circuits therefor involving features specific to the use of a compressible medium, e.g. air, steam
- F15B11/072—Combined pneumatic-hydraulic systems
- F15B11/076—Combined pneumatic-hydraulic systems with pneumatic drive or displacement and speed control or stopping by hydraulic braking
-
- 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
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/1423—Component parts; Constructional details
- F15B15/1466—Hollow piston sliding over a stationary rod inside the cylinder
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/21—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge
- F15B2211/216—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge the pressure sources being pneumatic-to-hydraulic converters
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/40—Flow control
- F15B2211/405—Flow control characterised by the type of flow control means or valve
- F15B2211/40507—Flow control characterised by the type of flow control means or valve with constant throttles or orifices
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/40—Flow control
- F15B2211/415—Flow control characterised by the connections of the flow control means in the circuit
- F15B2211/41527—Flow control characterised by the connections of the flow control means in the circuit being connected to an output member and a directional control valve
- F15B2211/41536—Flow control characterised by the connections of the flow control means in the circuit being connected to an output member and a directional control valve being connected to multiple ports of an output member
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/40—Flow control
- F15B2211/455—Control of flow in the feed line, i.e. meter-in control
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/75—Control of speed of the output member
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/885—Control specific to the type of fluid, e.g. specific to magnetorheological fluid
- F15B2211/8855—Compressible fluids, e.g. specific to pneumatics
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S60/00—Power plants
- Y10S60/907—Working member positioned against counterforce by constantly applied motive fluid
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Damping Devices (AREA)
- Chairs Characterized By Structure (AREA)
- Vehicle Body Suspensions (AREA)
- Load-Engaging Elements For Cranes (AREA)
- Ropes Or Cables (AREA)
- Actuator (AREA)
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEH54327A DE1301026B (de) | 1964-11-14 | 1964-11-14 | Hydropneumatisches Hebeaggregat, insbesondere fuer hoehenverstellbare Tische und Stuehle |
| DEH0054677 | 1964-12-23 | ||
| DEH0055001 | 1965-01-28 | ||
| DEH0055540 | 1965-03-23 | ||
| DEH0055561 | 1965-03-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BE672104A true BE672104A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1966-03-01 |
Family
ID=27512100
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BE672104D BE672104A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1964-11-14 | 1965-11-09 |
Country Status (9)
Families Citing this family (38)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1232598A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * | 1967-11-13 | 1971-05-19 | ||
| US3563349A (en) * | 1968-01-24 | 1971-02-16 | Rudolf Spieth | Blockable device for the stepless adjustment of flaps |
| DE1812282C3 (de) * | 1968-12-03 | 1981-07-30 | Fritz Bauer + Söhne oHG, 8503 Altdorf | Hubvorrichtung zum stufenlosen Höhenverstellen von Tischplatten, Stuhlsitzen u.dgl. |
| JPS4923879B1 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * | 1970-07-31 | 1974-06-19 | ||
| US3779132A (en) * | 1971-07-14 | 1973-12-18 | T Otto | Combination air and hydraulic motor |
| US3871527A (en) * | 1973-04-04 | 1975-03-18 | Westinghouse Electric Corp | Ram tensioning device |
| US4091488A (en) * | 1977-01-12 | 1978-05-30 | Kelley Company Inc. | Dockboard utilizing a gas spring for counterbalancing |
| DE2948081A1 (de) * | 1979-11-29 | 1981-06-04 | Stabilus Gmbh, 5400 Koblenz | Laengeneinstellbares federelement |
| DE3040483A1 (de) * | 1980-10-28 | 1982-06-16 | Stabilus Gmbh, 5400 Koblenz | Gasfeder mit hydraulischer blockierung |
| JPS57127136A (en) * | 1981-01-29 | 1982-08-07 | Tokico Ltd | Closed type cylinder device |
| HU186104B (en) * | 1982-08-10 | 1985-06-28 | Arpad Beres | Energy storing frame suitable for moving equipments |
| DE3413781A1 (de) * | 1984-04-12 | 1985-10-24 | Hermann Dipl.-Ing. Bansbach (FH), 7073 Lorch | Verstellbare stuetze |
| DE3446408C2 (de) * | 1984-12-20 | 1989-06-29 | Günther 7307 Aichwald Hahn | Blockierbare Gasfeder |
| GB2172373A (en) * | 1985-02-27 | 1986-09-17 | Furniture Ind Res Ass | Load lifting and support device |
| DE3519479A1 (de) * | 1985-05-31 | 1986-12-11 | Miele & Cie GmbH & Co, 4830 Gütersloh | Haushaltsgeraet mit verstellbaren geraetefuessen |
| DE3522722A1 (de) * | 1985-06-25 | 1987-01-08 | Otto Guenther | Hubvorrichtung zum stufenlosen verstellen von tischplatten, stuhlsitzen, rueckenlehnen von komfort-sesseln und dergleichen |
| DE3616438A1 (de) * | 1986-05-15 | 1987-11-19 | Stabilus Gmbh | Hydropneumatische verstelleinheit |
| SE464057B (sv) * | 1986-09-08 | 1991-03-04 | Bengt Petersson | Anordning foer stegloes hoejdinstaellning av en stolsits |
| DE3902882A1 (de) * | 1989-02-01 | 1990-08-02 | Stabilus Gmbh | Hydraulisch blockierbare gasfeder |
| DE3930372A1 (de) * | 1989-09-12 | 1991-03-21 | Stabilus Gmbh | Hydropneumatisches verstellelement |
| US5285877A (en) * | 1990-09-22 | 1994-02-15 | Boge Aktiengesellschaft | Impact damper |
| US5115723A (en) * | 1991-04-30 | 1992-05-26 | John Wang | Height adjusting device |
| US5913391A (en) * | 1997-01-09 | 1999-06-22 | Avm, Inc. | Damper |
| US6027185A (en) * | 1997-12-18 | 2000-02-22 | Caterpillar Inc. | Recoil and slack adjustment mechanism for an endless track chain of an undercarriage assembly |
| CN1965169B (zh) * | 2004-10-08 | 2012-02-08 | 施塔比鲁斯有限责任公司 | 流体线性驱动装置 |
| CA2507149A1 (en) * | 2005-05-12 | 2006-11-12 | P & M Design & Consulting Ltd. | Pneumatic cylinder |
| CN104930015A (zh) * | 2015-05-13 | 2015-09-23 | 中航飞机起落架有限责任公司 | 一种油气式可降载气动作动筒及其降载方法 |
| TW201727074A (zh) | 2015-12-18 | 2017-08-01 | 葛萊兒明尼蘇達股份有限公司 | 波紋管洩壓閥 |
| KR102677736B1 (ko) | 2015-12-18 | 2024-06-25 | 그라코 미네소타 인크. | 벨로우즈 회전-방지 구조 |
| CN105615287B (zh) * | 2016-03-24 | 2018-02-09 | 贵州大学 | 一种脚踏式升降桌 |
| CN106593997A (zh) * | 2016-11-28 | 2017-04-26 | 陈干惠 | 一种安全精密可灵活调整自锁油缸 |
| US10549803B2 (en) | 2017-06-30 | 2020-02-04 | Sram, Llc | Seat post assembly |
| US10668968B2 (en) | 2017-06-30 | 2020-06-02 | Sram, Llc | Seat post assembly |
| CN110219856B (zh) * | 2019-06-21 | 2024-03-08 | 宁波威曼智能科技有限公司 | 一种用于附锁气缸的气动锁 |
| CN110307208B (zh) * | 2019-07-12 | 2020-07-28 | 柳州市泽盛机械制造有限公司 | 一种密封多级液压缸 |
| CN110630582B (zh) * | 2019-09-10 | 2022-09-06 | 长沙理工大学 | 一种缸筒储能型液压缸 |
| DE102021100029A1 (de) * | 2020-05-26 | 2021-12-02 | H. Rottländer & A. Seuthe GbR (vertretungsberechtigter Gesellschafter: Hendrik Rottländer, 45277 Essen) | Arretiersystem |
| DE102020211523A1 (de) * | 2020-09-14 | 2022-03-17 | Kesseböhmer Holding Kg | Gasfedersystem für einen höhenverstellbaren Tisch, höhenverstellbarer Tisch und Verfahren zum Betreiben des Gasfedersystems |
Family Cites Families (30)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2218963A (en) * | 1938-12-13 | 1940-10-22 | Jay G Stephenson | Fluid supported stool |
| US2363142A (en) * | 1941-06-05 | 1944-11-21 | Warren B Reed | Hydropneumatic pumping jack |
| US2446127A (en) * | 1944-07-06 | 1948-07-27 | Richard R Cramer | Adjustable stool |
| FR953409A (fr) * | 1947-09-12 | 1949-12-06 | Appareil télescopique à action hydro-pneumatique combinée, applicable en particulier aux amortisseurs, élévateurs ou autres | |
| GB640414A (en) * | 1948-03-06 | 1950-07-19 | Mavor & Coulson Ltd | Improvements in props |
| DE819634C (de) * | 1950-05-13 | 1951-11-05 | Boge & Sohn G M B H | Fluessigkeits-Stossdaempfer, insbesondere fuer Strassen- und Schienen-fahrzeuge, mit einem mit Durchlassventilen fuer die Bremsfluessigkeit versehenen Kolben und einer luftgefuellten Ausgleichkammer |
| DE924721C (de) * | 1952-01-30 | 1955-03-07 | Emil Goelz | Teleskopartige Fuehrung |
| US2721446A (en) * | 1952-03-17 | 1955-10-25 | North American Aviation Inc | Accumulator-reservoir device |
| DE967007C (de) * | 1952-04-16 | 1957-09-26 | Albert Dillenburger | Hydraulischer Teleskopstossdaempfer, insbesondere fuer Kraftfahrzeuge, dessen Daempfung von aussen her regulierbar ist |
| US2861560A (en) * | 1952-07-26 | 1958-11-25 | Alinari Carlo | Gun for underwater fishing |
| US2707002A (en) * | 1952-08-30 | 1955-04-26 | Harris Thomas | Hydro-pneumatic accumulator |
| FR1076192A (fr) * | 1953-02-13 | 1954-10-25 | Blaw Knox Cie Fse | Perfectionnements aux appareils à fluide tels que vérins, accumulateurs d'énergie, ou amortisseurs par exemple |
| DE1036485B (de) * | 1954-02-18 | 1958-08-14 | Holzwaren Und Tischfabrik G M | Tisch mit in der Hoehe verstellbarer Tischplatte |
| US2986158A (en) * | 1955-09-03 | 1961-05-30 | Gratzmuller Jean Louis | Self-draining hydraulic energy accumulator |
| US2900972A (en) * | 1956-09-24 | 1959-08-25 | De Loss L Marsh | Underwater spear gun |
| US2880746A (en) * | 1957-06-07 | 1959-04-07 | Gen Motors Corp | Combination accumulator and unloading valve |
| FR1226787A (fr) * | 1958-05-10 | 1960-08-16 | Bochumer Ges Fuer Grubenausbau | Perfectionnements apportés aux étançons hydrauliques, notamment pour des galeriesou couloirs de mines |
| DE1181073B (de) * | 1959-03-06 | 1964-11-05 | Karl M Mayer | Teleskopartige hydropneumatische Abfederung fuer Fahrzeuge |
| DE1135308B (de) * | 1959-03-28 | 1962-08-23 | Hoesch Ag | Hydropneumatisches Federbein fuer Fahrzeuge mit Hoehenausgleich |
| DE1232837B (de) * | 1959-06-20 | 1967-01-19 | Stabilus Ind Und Handelsgesell | Teleskop-Fluessigkeitsstossdaempfer, insbesondere fuer Kraftfahrzeuge |
| US2994301A (en) * | 1960-01-11 | 1961-08-01 | Kirsch Jerry | Reciprocable hydro-pneumatic motor |
| US3150488A (en) * | 1961-11-22 | 1964-09-29 | Emmett L Haley | Power devices |
| AT234949B (de) * | 1961-11-27 | 1964-07-27 | Hans Peter Ing Doetsch | Verstellelement |
| US3178167A (en) * | 1961-12-30 | 1965-04-13 | Bosch Gmbh Robert | Suspension for vehicles or the like |
| NL293955A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * | 1962-06-19 | |||
| DE1503334A1 (de) * | 1962-12-03 | 1969-11-06 | Keelavite Hydraulics Ltd | Hydraulische Vorrichtung zum Erzeugen einer hin- und hergehenden Bewegung |
| US3237406A (en) * | 1962-12-10 | 1966-03-01 | Raymond Int Inc | Hydraulic hammer |
| DE1189871B (de) * | 1962-12-11 | 1965-03-25 | Fichtel & Sachs Ag | Hydropneumatischer Schwingungsdaempfer fuer Kraftfahrzeuge |
| US3267677A (en) * | 1963-05-09 | 1966-08-23 | Leo C Bollar | Impact forming machine |
| FR1365427A (fr) * | 1963-05-20 | 1964-07-03 | Dispositif de réglage en hauteur, notamment pour sièges |
-
1964
- 1964-11-14 DE DEH54327A patent/DE1301026B/de active Pending
- 1964-12-23 DE DE19641429576 patent/DE1429576A1/de active Pending
-
1965
- 1965-01-15 AT AT33665A patent/AT277510B/de not_active IP Right Cessation
- 1965-01-28 DE DE19651554251 patent/DE1554251A1/de active Pending
- 1965-03-23 DE DE19651554257 patent/DE1554257A1/de active Pending
- 1965-03-24 DE DE19651554258 patent/DE1554258A1/de active Pending
- 1965-10-29 CH CH1495465A patent/CH433649A/de unknown
- 1965-11-01 NO NO160281A patent/NO136133C/no unknown
- 1965-11-02 FR FR46259A patent/FR1453681A/fr not_active Expired
- 1965-11-09 BE BE672104D patent/BE672104A/xx not_active IP Right Cessation
- 1965-11-12 GB GB48147/65A patent/GB1123030A/en not_active Expired
- 1965-11-12 NL NL6514704A patent/NL6514704A/xx unknown
- 1965-11-16 US US508008A patent/US3415159A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US3415159A (en) | 1968-12-10 |
| DE1301026B (de) | 1969-08-14 |
| DE1554251A1 (de) | 1970-03-05 |
| NO136133B (no) | 1977-04-18 |
| FR1453681A (fr) | 1966-09-23 |
| NO136133C (no) | 1977-07-27 |
| DE1429576A1 (de) | 1970-01-29 |
| DE1554258A1 (de) | 1969-05-22 |
| DE1554257A1 (de) | 1970-03-05 |
| CH433649A (de) | 1967-04-15 |
| GB1123030A (en) | 1968-08-07 |
| NL6514704A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) | 1966-05-16 |
| AT277510B (de) | 1969-12-29 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| RE | Patent lapsed |
Owner name: REINHARD HORNLEIN K.G. Effective date: 19841109 |