Apparatus for dispensing viscous lubricant

A device for dispensing fluid from and charging fluid to a fluid reservoir, said device comprising, in combination,

• a fluid canister defining a fluid reservoir,
• auger-type pump means having first and second ports, said first port being in communication with said fluid reservoir,
• a conduit coupled to said second port and in communication therewith,
• a reversible electric motor coupled to said auger-type pump means,
• a power cell including circuitry connected to said motor and said power cell, said circuitry including a first switch having a first position, a second position and a neutral position, said circuitry being operable, when said first switch is in said first position, to deliver current of a given polarity from said power cell to said motor to cause said pump to pump fluid from said fluid canister to said fluid conduit, said circuitry being operable, when said first switch is in said second position, to deliver current of a polarity opposite that of the given polarity from said power cell to said motor to cause said pump to pump fluid from the fluid conduit into said fluid canister,
• spring means for pressurizing fluid in said fluid canister, and
• refill cut-off means including a second switch in said power cell circuitry, said second switch being operable in a first position and inoperable in a second position to interrupt the flow of current of a polarity opposite that of the given polarity which would otherwise flow when said first switch is in said second position.

A hand-held device for dispensing fluid form and charging fluid to a fluid reservoir, said device comprising, in combination,

• a housing,
• a canister defining a fluid reservoir,
• auger-type pump means supported in said housing, said pump having first and second ports, said first port being in communication with said fluid reservoir when said canister is supported on said housing,
• a conduit coupled to said second port and in communication therewith and with the exterior of said housing,
• a reversible electric motor coupled to said auger-type pump means,
• a power cell including circuitry connected to said motor and said power cell, said circuitry including a switch having a first position, a second position and a neutral position, said circuitry being operable, when said switch is in said first position, to deliver current of a givne polarity from said power cell to said motor to cause said pump to pump fluid from said fluid canister to said fluid conduit, said circuitry being operable, when said switch is in said second position, to deliver current of a polarity opposite that of the given polarity from said power cell to said motor to cause said pump to pump fluid from the fluid conduit into said fluid canister,
• spring means for pressurizing fluid in said fluid canister and
• metering means in said power cell circuitry, said metering mens being operable, when said switch is moved from said first position to said neutral position, to maintain the flow of current to said motor until the completion of one cycle.

A device for dispensing fluid from a fluid reservoir, said device comprising, in combination,

• a fluid canister defining a fluid reservoir,
• pump means having first and second ports, said first port being in communication with said fluid reservoir,
• a conduit coupled to said second port and in communication therewith,
• an electric motor coupled in driving relationship with said pump means,
• a power cell including circuitry connected to said motor and said power cell, said circuitry including a switch having a first position and a neutral position, said circuitry being operable, when said switch is in said first position, to deliver current of a given polarity from said power cell to said motor to cause said pump to pump fluid from said fluid canister to said fluid conduit,
• spring means for pressurizing fluid in said fluid canister and
• metering means operable, when said switch is moved from said first position to said neutral position, to maintain the flow of current to the given polarity to said motor until the completion of one cycle.

A hand-held device for dispensing fluid from a fluid reservoir, said device comprising, in combination,

• a housing,
• a canister defining a fluid reservoir,
• pump means supported in said housing, said pump having first and second ports, said first port being in communication with said fluid reservoir when said canister is supported on said housing,
• a conduit coupled to said second port and in communication therewith and with the exterior of said housing,
• an electric motor coupled to said pump means,
• a power cell including circuitry connected to said motor and said power cell, said circuitry including a switch having a first position and a neutral position, said circuitry being operable, when said switch is in said first position, to deliver current of a given polarity from said power cell to said motor to cause said pump means to pump fluid form said fluid canister to said fluid conduit,
• spring means for pressurizing fluid in said fluid canister and
• metering means in said power cell circuitry, said metering means being operable, when said switch is moved from said first position to said neutral position, to maintain the flow of current to said motor until the completion of one cycle.