Aerodynamic trimmer head for use in flexible line rotary trimmers
An aerodynamic trimmer head assembly for use in flexible line rotary trimmers including a trimmer head having a curvilinear upper head surface and a shroud having a curvilinear portion extending over the head surface. A plurality of ribs extend downwardly and forwardly in the direction of rotation b...
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| creator | PFALTZGRAFF JAMES R PROULX RICHARD A |
| description | An aerodynamic trimmer head assembly for use in flexible line rotary trimmers including a trimmer head having a curvilinear upper head surface and a shroud having a curvilinear portion extending over the head surface. A plurality of ribs extend downwardly and forwardly in the direction of rotation between the head surface and shroud defining a plurality of channels extending between portions of the upper head surface and shroud along curvilinear paths defined by the ribs. The channels define inlet openings in an upper portion of the shroud and outlet openings about the lower end portion thereof. During rotation of the head and shroud, air is drawn downwardly about the drive mechanism, through the channel inlets, into and through the channels and outwardly therefrom at a forward inclination about the line projecting from the housing thereby cooling the drive mechanism of the rotary trimmer and reducing aerodynamic drag on the line. |
| format | Patent |
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A plurality of ribs extend downwardly and forwardly in the direction of rotation between the head surface and shroud defining a plurality of channels extending between portions of the upper head surface and shroud along curvilinear paths defined by the ribs. The channels define inlet openings in an upper portion of the shroud and outlet openings about the lower end portion thereof. During rotation of the head and shroud, air is drawn downwardly about the drive mechanism, through the channel inlets, into and through the channels and outwardly therefrom at a forward inclination about the line projecting from the housing thereby cooling the drive mechanism of the rotary trimmer and reducing aerodynamic drag on the line.</description><language>eng</language><subject>AGRICULTURE ; ANIMAL HUSBANDRY ; CUTTING ; FISHING ; FORESTRY ; HAND CUTTING TOOLS ; HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR ; HARVESTING ; HUMAN NECESSITIES ; HUNTING ; MOWING ; PERFORMING OPERATIONS ; SEVERING ; TRANSPORTING ; TRAPPING</subject><creationdate>2014</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=20141230&DB=EPODOC&CC=US&NR=8918999B2$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25564,76547</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20141230&DB=EPODOC&CC=US&NR=8918999B2$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>PFALTZGRAFF JAMES R</creatorcontrib><creatorcontrib>PROULX RICHARD A</creatorcontrib><title>Aerodynamic trimmer head for use in flexible line rotary trimmers</title><description>An aerodynamic trimmer head assembly for use in flexible line rotary trimmers including a trimmer head having a curvilinear upper head surface and a shroud having a curvilinear portion extending over the head surface. A plurality of ribs extend downwardly and forwardly in the direction of rotation between the head surface and shroud defining a plurality of channels extending between portions of the upper head surface and shroud along curvilinear paths defined by the ribs. The channels define inlet openings in an upper portion of the shroud and outlet openings about the lower end portion thereof. During rotation of the head and shroud, air is drawn downwardly about the drive mechanism, through the channel inlets, into and through the channels and outwardly therefrom at a forward inclination about the line projecting from the housing thereby cooling the drive mechanism of the rotary trimmer and reducing aerodynamic drag on the line.</description><subject>AGRICULTURE</subject><subject>ANIMAL HUSBANDRY</subject><subject>CUTTING</subject><subject>FISHING</subject><subject>FORESTRY</subject><subject>HAND CUTTING TOOLS</subject><subject>HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR</subject><subject>HARVESTING</subject><subject>HUMAN NECESSITIES</subject><subject>HUNTING</subject><subject>MOWING</subject><subject>PERFORMING OPERATIONS</subject><subject>SEVERING</subject><subject>TRANSPORTING</subject><subject>TRAPPING</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2014</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZHB0TC3KT6nMS8zNTFYoKcrMzU0tUshITUxRSMsvUigtTlXIzFNIy0mtyEzKSVXIycxLVSjKL0ksqoQpLuZhYE1LzClO5YXS3AwKbq4hzh66qQX58anFBYnJqXmpJfGhwRaWhhaWlpZORsZEKAEAsJQxtA</recordid><startdate>20141230</startdate><enddate>20141230</enddate><creator>PFALTZGRAFF JAMES R</creator><creator>PROULX RICHARD A</creator><scope>EVB</scope></search><sort><creationdate>20141230</creationdate><title>Aerodynamic trimmer head for use in flexible line rotary trimmers</title><author>PFALTZGRAFF JAMES R ; PROULX RICHARD A</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_US8918999B23</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>2014</creationdate><topic>AGRICULTURE</topic><topic>ANIMAL HUSBANDRY</topic><topic>CUTTING</topic><topic>FISHING</topic><topic>FORESTRY</topic><topic>HAND CUTTING TOOLS</topic><topic>HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR</topic><topic>HARVESTING</topic><topic>HUMAN NECESSITIES</topic><topic>HUNTING</topic><topic>MOWING</topic><topic>PERFORMING OPERATIONS</topic><topic>SEVERING</topic><topic>TRANSPORTING</topic><topic>TRAPPING</topic><toplevel>online_resources</toplevel><creatorcontrib>PFALTZGRAFF JAMES R</creatorcontrib><creatorcontrib>PROULX RICHARD A</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>PFALTZGRAFF JAMES R</au><au>PROULX RICHARD A</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Aerodynamic trimmer head for use in flexible line rotary trimmers</title><date>2014-12-30</date><risdate>2014</risdate><abstract>An aerodynamic trimmer head assembly for use in flexible line rotary trimmers including a trimmer head having a curvilinear upper head surface and a shroud having a curvilinear portion extending over the head surface. A plurality of ribs extend downwardly and forwardly in the direction of rotation between the head surface and shroud defining a plurality of channels extending between portions of the upper head surface and shroud along curvilinear paths defined by the ribs. The channels define inlet openings in an upper portion of the shroud and outlet openings about the lower end portion thereof. During rotation of the head and shroud, air is drawn downwardly about the drive mechanism, through the channel inlets, into and through the channels and outwardly therefrom at a forward inclination about the line projecting from the housing thereby cooling the drive mechanism of the rotary trimmer and reducing aerodynamic drag on the line.</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | AGRICULTURE ANIMAL HUSBANDRY CUTTING FISHING FORESTRY HAND CUTTING TOOLS HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR HARVESTING HUMAN NECESSITIES HUNTING MOWING PERFORMING OPERATIONS SEVERING TRANSPORTING TRAPPING |
| title | Aerodynamic trimmer head for use in flexible line rotary trimmers |
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