Powder-dispensing device

Claim 1

In a powder-dispensing device comprising a sliding metering member defining a volume disposed therethrough, an upper member having an inlet passageway and a lower member having an outlet passageway; said passageways being spaced apart such that the volume may be moved into registry with either of said passageways; the improvement comprising the use of at least one resilient insert disposed between said metering member and at least one of said other members, said insert containing an aperture such that said passageway communicates with said volume through said aperture when said volume is in registry with said passageway and a surface for slidingly engaging said metering member and wherein said surface includes a rim extending outwardly above said surface, said rim enclosing at least the surface of said insert over which said volume moves.

Claim 5

A device for dispensing a measured volume of a powder comprising, in combination: a. a cap member having an upper surface, and a lower surface defining a straight-line slot extending thereacross with the bottom surface of the slot intersecting a central cavity, said cap member further defining an inlet passageway extending therethrough and terminating at one end in said upper surface and at the other end in said cavity; b. a first insert member comprising a resilient material filling said cap member cavity and defining an aperture therethrough in register with the termination of said cap member passageway, said first insert member having a lower surface in substantial alignment with the bottom surface of said cap member slot and defining a continuous trough therein adjacent the periphery thereof; c. a base member having a lower surface, and an upper surface complementAry to the lower surface of said cap member and defining a straight-line slot extending thereacross with the bottom surface of the slot intersecting a central cavity, said base member further defining an outlet passageway extending therethrough and terminating at one end in said cavity and at the other end in said lower surface; d. a second insert member comprising a resilient material filling said base member cavity and defining an aperture therethrough in register with the termination of said base member passageway, said second insert member having an upper surface in substantial alignment with the bottom surface of said base member slot and defining a continuous trough therein adjacent the periphery thereof; e. said cap member being superimposed on said base member with their complementary surfaces in mating engagement and with their straight-line slots in registry to form a channel, and with the apertures through their insert members being displaced from each other along the length of the channel; and, f. an elongate straight-sided sliding member including a main body portion having an upper surface complementary to the bottom surface of said cap member slot and the lower surface of said first insert member, and having a lower surface complementary to the bottom surface of said base member slot and the upper surface of said second insert member, said main body portion defining a transfer passageway therethrough terminating at one end in said upper surface and at the other end in said lower surface, the volume of said transfer passageway corresponding to said measured volume of powder; g. said main body portion being sized to fit said channel and being slidably mounted therein for longitudinal movement between a first position wherein said transfer passageway is in registry with the aperture through said first insert member and a second position wherein said transfer passageway is in registry with the aperture through said second insert member, whereby when powder is applied to the inlet passageway of said cap member and said sliding member moved to said first position a quantity of powder will gravitate through said inlet passageway and fill the transfer passageway of said sliding member, subsequent movement of said sliding member toward said second position carrying a measured volume of said powder in said transfer passageway, said measured volume of powder gravitating from said transfer passageway through the aperture in said second insert member and discharging through the outlet passageway in said base member when said sliding member reaches said second position.

Claim 6

A device for dispensing a measured volume of a powder comprising, in combination: a. a cap member having an upper surface, and a lower surface defining a straight-line slot extending thereacross with the bottom surface of the slot intersecting a central cavity, said cap member further defining an inlet passageway extending therethrough and terminating at one end in said upper surface and at the other end in said cavity; b. a first insert member comprising a resilient material filling said cap member cavity and defining an aperture therethrough in register with the termination of said cap member passageway, said first insert member having a lower surface in substantial alignment with the bottom surface of said cap member slot and defining a continuous trough therein adjacent the periphery thereof; c. a base member having a lower surface, and an upper surface complementAry to the lower surface of said cap member and defining a straight-line slot extending thereacross with the bottom surface of the slot intersecting a central cavity, said base member further defining an outlet passageway extending therethrough and terminating at one end in said cavity and at the other end in said lower surface; d. a second insert member comprising a resilient material filling said base member cavity and defining an aperture therethrough in register with the termination of said base member passageway, said second insert member having an upper surface in substantial alignment with the bottom surface of said base member slot and defining a continuous trough therein adjacent the periphery thereof; e. said cap member being superimposed on said base member with their complementary surfaces in mating engagement and with their straight-line slots in registry to form a channel, and with the apertures through their insert members being displaced from each other along the length of the channel; and, f. an elongate straight-sided sliding member including a main body portion having an upper surface complementary to the bottom surface of said cap member slot and the lower surface of said first insert member, and having a lower surface complementary to the bottom surface of said base member slot and the upper surface of said second insert member, said main body portion defining a transfer passageway therethrough terminating at one end in said upper surface and at the other end in said lower surface, the volume of said transfer passageway corresponding to said measured volume of powder; g. said main body portion being sized to fit said channel and being slidably mounted therein for longitudinal movement between a first position wherein said transfer passageway is in registry with the aperture through said first insert member and a second position wherein said transfer passageway is in registry with the aperture through said second insert member, whereby when powder is applied to the inlet passageway of said cap member and said sliding member moved to said first position a quantity of powder will gravitate through said inlet passageway and fill the transfer passageway of said sliding member, subsequent movement of said sliding member toward said second position carrying a measured volume of said powder in said transfer passageway, said measured volume of powder gravitating from said transfer passageway through the aperture in said second insert member and discharging through the outlet passageway in said base member when said sliding member reaches said second position.