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Sealant melter/applicator with automatic load switching system

  • US 4,692,028 A
  • Filed: 08/19/1986
  • Issued: 09/08/1987
  • Est. Priority Date: 08/19/1986
  • Status: Expired due to Fees
First Claim
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1. A load switching system for a sealant melter/applicator comprising:

  • a. a sealant melting chamber;

    b. an internal combustion engine for rotating a power output shaft;

    c. an hydraulic pump for converting the rotary motion of said power output shaft into a flow of pressurized hydraulic fluid;

    d. a first hydraulic motor having an output shaft for driving a sealant agitator positioned within said sealant melting chamber;

    e. a second hydraulic motor for driving a sealant pump to transfer sealant from said sealant melting chamber through an applicator hose to a sealant discharge nozzle;

    f. a sealant flow control valve coupled in series with said hose for regulating the flow of sealant through said sealant discharge nozzle, said valve including open and closed positions;

    g. means for sensing the position of said sealant flow control valve; and

    h. flow diverter means coupled to said position sensing means and to said hydraulic pump for directing the flow of pressurized hydraulic fluid from said hydraulic pump to said first hydraulic motor when said sealant flow control valve is in the closed position and for directing the flow of pressurized hydraulic fluid from said hydraulic pump to said second hydraulic motor when said sealant flow control valve is in the open position;

    whereby the load on said engine is maintained substantially constant as sealant is intermittently discharged through said sealant flow control valve.

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