HYDRAULIC CONTROLLING CIRCUIT OF HAMMER FOR PILE DRIVER
PURPOSE:To reduce bad effects of surge pressure on a hydraulic apparatus to the utmost, by providing a bypass pipeline branching from a return pipeline at the hydraulic circuit of the hammer for the pile driver and reducing thereby the surge pressure generated in the return pipeline at the time of f...
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| creator | SAITOU TAKEO OOUCHI MINORU TSUNABUCHI MASAKI HARA SEIICHIROU AZEGAMI MAKOTO |
| description | PURPOSE:To reduce bad effects of surge pressure on a hydraulic apparatus to the utmost, by providing a bypass pipeline branching from a return pipeline at the hydraulic circuit of the hammer for the pile driver and reducing thereby the surge pressure generated in the return pipeline at the time of free dropping of the hammer. CONSTITUTION:When the hammer drops and the rod of a hydraulic cylinder 10 is contracted, joining oil in a rod chambe 10a and a head chamber 10b flows instantaneously into the return pipeline 11, whereby surge pressure is generated in the return pipeline 11. Then, by the hydraulic pressure thereof, a check valve 14 for back pressure is opened and thereby a part of oil is returned to an oil tank 1 through the bypass pipeline 13. Accordingly, the surge pressure is lowered since an ordinary quantity of oil is to flow through the return pipeline 11. By this constitution, the filter 6 of the return pipeline 11 is not subjected to the bad effects due to the surge pressure nearly at all. |
| format | Patent |
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CONSTITUTION:When the hammer drops and the rod of a hydraulic cylinder 10 is contracted, joining oil in a rod chambe 10a and a head chamber 10b flows instantaneously into the return pipeline 11, whereby surge pressure is generated in the return pipeline 11. Then, by the hydraulic pressure thereof, a check valve 14 for back pressure is opened and thereby a part of oil is returned to an oil tank 1 through the bypass pipeline 13. Accordingly, the surge pressure is lowered since an ordinary quantity of oil is to flow through the return pipeline 11. By this constitution, the filter 6 of the return pipeline 11 is not subjected to the bad effects due to the surge pressure nearly at all.</description><language>eng</language><subject>BLASTING ; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR ; EMBANKMENTS ; EXCAVATIONS ; FIXED CONSTRUCTIONS ; FLUID-PRESSURE ACTUATORS ; FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS ; FOUNDATIONS ; HEATING ; HYDRAULIC ENGINEERING ; HYDRAULICS OR PNEUMATICS IN GENERAL ; LIGHTING ; MECHANICAL ENGINEERING ; SOIL SHIFTING ; SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL ; UNDERGROUND OR UNDERWATER STRUCTURES ; WEAPONS</subject><creationdate>1982</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=19820319&DB=EPODOC&CC=JP&NR=S5748021A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25543,76294</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19820319&DB=EPODOC&CC=JP&NR=S5748021A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>SAITOU TAKEO</creatorcontrib><creatorcontrib>OOUCHI MINORU</creatorcontrib><creatorcontrib>TSUNABUCHI MASAKI</creatorcontrib><creatorcontrib>HARA SEIICHIROU</creatorcontrib><creatorcontrib>AZEGAMI MAKOTO</creatorcontrib><title>HYDRAULIC CONTROLLING CIRCUIT OF HAMMER FOR PILE DRIVER</title><description>PURPOSE:To reduce bad effects of surge pressure on a hydraulic apparatus to the utmost, by providing a bypass pipeline branching from a return pipeline at the hydraulic circuit of the hammer for the pile driver and reducing thereby the surge pressure generated in the return pipeline at the time of free dropping of the hammer. CONSTITUTION:When the hammer drops and the rod of a hydraulic cylinder 10 is contracted, joining oil in a rod chambe 10a and a head chamber 10b flows instantaneously into the return pipeline 11, whereby surge pressure is generated in the return pipeline 11. Then, by the hydraulic pressure thereof, a check valve 14 for back pressure is opened and thereby a part of oil is returned to an oil tank 1 through the bypass pipeline 13. Accordingly, the surge pressure is lowered since an ordinary quantity of oil is to flow through the return pipeline 11. By this constitution, the filter 6 of the return pipeline 11 is not subjected to the bad effects due to the surge pressure nearly at all.</description><subject>BLASTING</subject><subject>DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR</subject><subject>EMBANKMENTS</subject><subject>EXCAVATIONS</subject><subject>FIXED CONSTRUCTIONS</subject><subject>FLUID-PRESSURE ACTUATORS</subject><subject>FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS</subject><subject>FOUNDATIONS</subject><subject>HEATING</subject><subject>HYDRAULIC ENGINEERING</subject><subject>HYDRAULICS OR PNEUMATICS IN GENERAL</subject><subject>LIGHTING</subject><subject>MECHANICAL ENGINEERING</subject><subject>SOIL SHIFTING</subject><subject>SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL</subject><subject>UNDERGROUND OR UNDERWATER STRUCTURES</subject><subject>WEAPONS</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1982</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZDD3iHQJcgz18XRWcPb3Cwny9_Hx9HNXcPYMcg71DFHwd1PwcPT1dQ1ScPMPUgjw9HFVcAnyDHMN4mFgTUvMKU7lhdLcDApuriHOHrqpBfnxqcUFicmpeakl8V4BwabmJhYGRoaOxkQoAQD8fCgZ</recordid><startdate>19820319</startdate><enddate>19820319</enddate><creator>SAITOU TAKEO</creator><creator>OOUCHI MINORU</creator><creator>TSUNABUCHI MASAKI</creator><creator>HARA SEIICHIROU</creator><creator>AZEGAMI MAKOTO</creator><scope>EVB</scope></search><sort><creationdate>19820319</creationdate><title>HYDRAULIC CONTROLLING CIRCUIT OF HAMMER FOR PILE DRIVER</title><author>SAITOU TAKEO ; OOUCHI MINORU ; TSUNABUCHI MASAKI ; HARA SEIICHIROU ; AZEGAMI MAKOTO</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_JPS5748021A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>1982</creationdate><topic>BLASTING</topic><topic>DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR</topic><topic>EMBANKMENTS</topic><topic>EXCAVATIONS</topic><topic>FIXED CONSTRUCTIONS</topic><topic>FLUID-PRESSURE ACTUATORS</topic><topic>FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS</topic><topic>FOUNDATIONS</topic><topic>HEATING</topic><topic>HYDRAULIC ENGINEERING</topic><topic>HYDRAULICS OR PNEUMATICS IN GENERAL</topic><topic>LIGHTING</topic><topic>MECHANICAL ENGINEERING</topic><topic>SOIL SHIFTING</topic><topic>SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL</topic><topic>UNDERGROUND OR UNDERWATER STRUCTURES</topic><topic>WEAPONS</topic><toplevel>online_resources</toplevel><creatorcontrib>SAITOU TAKEO</creatorcontrib><creatorcontrib>OOUCHI MINORU</creatorcontrib><creatorcontrib>TSUNABUCHI MASAKI</creatorcontrib><creatorcontrib>HARA SEIICHIROU</creatorcontrib><creatorcontrib>AZEGAMI MAKOTO</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>SAITOU TAKEO</au><au>OOUCHI MINORU</au><au>TSUNABUCHI MASAKI</au><au>HARA SEIICHIROU</au><au>AZEGAMI MAKOTO</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>HYDRAULIC CONTROLLING CIRCUIT OF HAMMER FOR PILE DRIVER</title><date>1982-03-19</date><risdate>1982</risdate><abstract>PURPOSE:To reduce bad effects of surge pressure on a hydraulic apparatus to the utmost, by providing a bypass pipeline branching from a return pipeline at the hydraulic circuit of the hammer for the pile driver and reducing thereby the surge pressure generated in the return pipeline at the time of free dropping of the hammer. CONSTITUTION:When the hammer drops and the rod of a hydraulic cylinder 10 is contracted, joining oil in a rod chambe 10a and a head chamber 10b flows instantaneously into the return pipeline 11, whereby surge pressure is generated in the return pipeline 11. Then, by the hydraulic pressure thereof, a check valve 14 for back pressure is opened and thereby a part of oil is returned to an oil tank 1 through the bypass pipeline 13. Accordingly, the surge pressure is lowered since an ordinary quantity of oil is to flow through the return pipeline 11. By this constitution, the filter 6 of the return pipeline 11 is not subjected to the bad effects due to the surge pressure nearly at all.</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | BLASTING DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR EMBANKMENTS EXCAVATIONS FIXED CONSTRUCTIONS FLUID-PRESSURE ACTUATORS FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS FOUNDATIONS HEATING HYDRAULIC ENGINEERING HYDRAULICS OR PNEUMATICS IN GENERAL LIGHTING MECHANICAL ENGINEERING SOIL SHIFTING SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL UNDERGROUND OR UNDERWATER STRUCTURES WEAPONS |
| title | HYDRAULIC CONTROLLING CIRCUIT OF HAMMER FOR PILE DRIVER |
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