Reciprocating actuator
An actuator is driven in a first direction by equal working fluid pressures acting on different piston areas acting in opposite directions, and is driven in a second direction by applying equal pressures on both sides of one of the piston areas. Working fluid from an inlet port (71), acting in a wor...
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| creator | SAITA, SEIJI |
| description | An actuator is driven in a first direction by equal working fluid pressures acting on different piston areas acting in opposite directions, and is driven in a second direction by applying equal pressures on both sides of one of the piston areas. Working fluid from an inlet port (71), acting in a working fluid chamber (27), on one side of the piston moves a valve plate (36), closing vent ports (33) and opening working fluid discharge ports (32), thereby permitting the working fluid to push the piston (21) in a first direction. Working fluid contained in the working fluid chamber (21) is exhausted from working fluid discharge ports (32) to the outside of the system through a working fluid discharge tube (52). When the movement of piston (21) reaches its limit, a valve plate (36) is engaged by a spring (41), thereby causing simultaneous closing of the working fluid discharge ports (32) and the opening of the vent ports (33). As a result of the opening of the vent ports (33), working fluid pressures in the working fluid chamber (27) and a second working fluid chamber (26) are equalised. The effective piston area facing the second chamber is greater than the effective area facing the first chamber so the direction of piston movement is reversed. The working fluid discharge pipe (52) is fluid-tightly fitted through the piston (21) so as to provide a discharge path of working fluid from the system. |
| format | Patent |
| fullrecord | <record><control><sourceid>epo_EVB</sourceid><recordid>TN_cdi_epo_espacenet_EP0428406A1</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>EP0428406A1</sourcerecordid><originalsourceid>FETCH-epo_espacenet_EP0428406A13</originalsourceid><addsrcrecordid>eNrjZBALSk3OLCjKT04sycxLV0hMLilNLMkv4mFgTUvMKU7lhdLcDApuriHOHrqpBfnxqcUFicmpeakl8a4BBiZGFiYGZo6GxkQoAQB7hCFi</addsrcrecordid><sourcetype>Open Access Repository</sourcetype><iscdi>true</iscdi><recordtype>patent</recordtype></control><display><type>patent</type><title>Reciprocating actuator</title><source>esp@cenet</source><creator>SAITA, SEIJI</creator><creatorcontrib>SAITA, SEIJI</creatorcontrib><description>An actuator is driven in a first direction by equal working fluid pressures acting on different piston areas acting in opposite directions, and is driven in a second direction by applying equal pressures on both sides of one of the piston areas. Working fluid from an inlet port (71), acting in a working fluid chamber (27), on one side of the piston moves a valve plate (36), closing vent ports (33) and opening working fluid discharge ports (32), thereby permitting the working fluid to push the piston (21) in a first direction. Working fluid contained in the working fluid chamber (21) is exhausted from working fluid discharge ports (32) to the outside of the system through a working fluid discharge tube (52). When the movement of piston (21) reaches its limit, a valve plate (36) is engaged by a spring (41), thereby causing simultaneous closing of the working fluid discharge ports (32) and the opening of the vent ports (33). As a result of the opening of the vent ports (33), working fluid pressures in the working fluid chamber (27) and a second working fluid chamber (26) are equalised. The effective piston area facing the second chamber is greater than the effective area facing the first chamber so the direction of piston movement is reversed. The working fluid discharge pipe (52) is fluid-tightly fitted through the piston (21) so as to provide a discharge path of working fluid from the system.</description><language>eng ; fre ; ger</language><subject>BLASTING ; CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES ; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR ; ENGINE PLANTS IN GENERAL ; FLUID-PRESSURE ACTUATORS ; FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS ; HEATING ; HYDRAULICS OR PNEUMATICS IN GENERAL ; LIGHTING ; MACHINES OR ENGINES FOR LIQUIDS ; MACHINES OR ENGINES IN GENERAL ; MECHANICAL ENGINEERING ; OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR ; POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS ; POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS ; PRODUCING MECHANICAL POWER ; PUMPS ; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS ; STEAM ENGINES ; SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL ; WEAPONS ; WIND, SPRING WEIGHT AND MISCELLANEOUS MOTORS</subject><creationdate>1991</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19910522&DB=EPODOC&CC=EP&NR=0428406A1$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,778,883,25551,76302</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19910522&DB=EPODOC&CC=EP&NR=0428406A1$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>SAITA, SEIJI</creatorcontrib><title>Reciprocating actuator</title><description>An actuator is driven in a first direction by equal working fluid pressures acting on different piston areas acting in opposite directions, and is driven in a second direction by applying equal pressures on both sides of one of the piston areas. Working fluid from an inlet port (71), acting in a working fluid chamber (27), on one side of the piston moves a valve plate (36), closing vent ports (33) and opening working fluid discharge ports (32), thereby permitting the working fluid to push the piston (21) in a first direction. Working fluid contained in the working fluid chamber (21) is exhausted from working fluid discharge ports (32) to the outside of the system through a working fluid discharge tube (52). When the movement of piston (21) reaches its limit, a valve plate (36) is engaged by a spring (41), thereby causing simultaneous closing of the working fluid discharge ports (32) and the opening of the vent ports (33). As a result of the opening of the vent ports (33), working fluid pressures in the working fluid chamber (27) and a second working fluid chamber (26) are equalised. The effective piston area facing the second chamber is greater than the effective area facing the first chamber so the direction of piston movement is reversed. The working fluid discharge pipe (52) is fluid-tightly fitted through the piston (21) so as to provide a discharge path of working fluid from the system.</description><subject>BLASTING</subject><subject>CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES</subject><subject>DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR</subject><subject>ENGINE PLANTS IN GENERAL</subject><subject>FLUID-PRESSURE ACTUATORS</subject><subject>FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS</subject><subject>HEATING</subject><subject>HYDRAULICS OR PNEUMATICS IN GENERAL</subject><subject>LIGHTING</subject><subject>MACHINES OR ENGINES FOR LIQUIDS</subject><subject>MACHINES OR ENGINES IN GENERAL</subject><subject>MECHANICAL ENGINEERING</subject><subject>OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR</subject><subject>POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS</subject><subject>POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS</subject><subject>PRODUCING MECHANICAL POWER</subject><subject>PUMPS</subject><subject>PUMPS FOR LIQUIDS OR ELASTIC FLUIDS</subject><subject>STEAM ENGINES</subject><subject>SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL</subject><subject>WEAPONS</subject><subject>WIND, SPRING WEIGHT AND MISCELLANEOUS MOTORS</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1991</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZBALSk3OLCjKT04sycxLV0hMLilNLMkv4mFgTUvMKU7lhdLcDApuriHOHrqpBfnxqcUFicmpeakl8a4BBiZGFiYGZo6GxkQoAQB7hCFi</recordid><startdate>19910522</startdate><enddate>19910522</enddate><creator>SAITA, SEIJI</creator><scope>EVB</scope></search><sort><creationdate>19910522</creationdate><title>Reciprocating actuator</title><author>SAITA, SEIJI</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_EP0428406A13</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng ; fre ; ger</language><creationdate>1991</creationdate><topic>BLASTING</topic><topic>CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES</topic><topic>DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR</topic><topic>ENGINE PLANTS IN GENERAL</topic><topic>FLUID-PRESSURE ACTUATORS</topic><topic>FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS</topic><topic>HEATING</topic><topic>HYDRAULICS OR PNEUMATICS IN GENERAL</topic><topic>LIGHTING</topic><topic>MACHINES OR ENGINES FOR LIQUIDS</topic><topic>MACHINES OR ENGINES IN GENERAL</topic><topic>MECHANICAL ENGINEERING</topic><topic>OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR</topic><topic>POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS</topic><topic>POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS</topic><topic>PRODUCING MECHANICAL POWER</topic><topic>PUMPS</topic><topic>PUMPS FOR LIQUIDS OR ELASTIC FLUIDS</topic><topic>STEAM ENGINES</topic><topic>SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL</topic><topic>WEAPONS</topic><topic>WIND, SPRING WEIGHT AND MISCELLANEOUS MOTORS</topic><toplevel>online_resources</toplevel><creatorcontrib>SAITA, SEIJI</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>SAITA, SEIJI</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Reciprocating actuator</title><date>1991-05-22</date><risdate>1991</risdate><abstract>An actuator is driven in a first direction by equal working fluid pressures acting on different piston areas acting in opposite directions, and is driven in a second direction by applying equal pressures on both sides of one of the piston areas. Working fluid from an inlet port (71), acting in a working fluid chamber (27), on one side of the piston moves a valve plate (36), closing vent ports (33) and opening working fluid discharge ports (32), thereby permitting the working fluid to push the piston (21) in a first direction. Working fluid contained in the working fluid chamber (21) is exhausted from working fluid discharge ports (32) to the outside of the system through a working fluid discharge tube (52). When the movement of piston (21) reaches its limit, a valve plate (36) is engaged by a spring (41), thereby causing simultaneous closing of the working fluid discharge ports (32) and the opening of the vent ports (33). As a result of the opening of the vent ports (33), working fluid pressures in the working fluid chamber (27) and a second working fluid chamber (26) are equalised. The effective piston area facing the second chamber is greater than the effective area facing the first chamber so the direction of piston movement is reversed. The working fluid discharge pipe (52) is fluid-tightly fitted through the piston (21) so as to provide a discharge path of working fluid from the system.</abstract><oa>free_for_read</oa></addata></record> |
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| language | eng ; fre ; ger |
| recordid | cdi_epo_espacenet_EP0428406A1 |
| source | esp@cenet |
| subjects | BLASTING CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR ENGINE PLANTS IN GENERAL FLUID-PRESSURE ACTUATORS FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS HEATING HYDRAULICS OR PNEUMATICS IN GENERAL LIGHTING MACHINES OR ENGINES FOR LIQUIDS MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS PRODUCING MECHANICAL POWER PUMPS PUMPS FOR LIQUIDS OR ELASTIC FLUIDS STEAM ENGINES SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL WEAPONS WIND, SPRING WEIGHT AND MISCELLANEOUS MOTORS |
| title | Reciprocating actuator |
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