Oil reclaimer

Claim 1

AN APPARATUS FOR REFINING USED LUBRICATING OIL COMPRISING IN COMBINATION: A HEATING TANK HAVING AN OPENING THROUGH A WALL THEREOF FOR RECEIVING A BATCH INCLUDING A CHARGE OF USED OIL TO BE REFINED AND A CHARGE OF OIL REFINING SOLIDS; AN ELECTRICALLY POWERED IMMERSION HEATER UNIT INCLUDING A PLURALITY BLADE HEATING ELEMENTS SUPPORTED TO EXTEND IMWARDLY THROUGH A WALL ON SAID HEATING TANK FOR HEATING SAID BATCH WHEREBY TO EFFECT HEAT PURIFICATION OF SAID USED OIL; A FIRST IMMERSION PUMP MEANS INCLUDING A PUMP HOUSING DEFINING AN INLET AND AN OUTLET; A MOUNTING PLATE FIXED TO A TOOP WALL OF SAID HEATING TANK FOR REMOVABLE SUSPENDING SAID PUMP HOUSING WITHIN SAID HEATING TANK TO POSITION SAID INLET IN A DOWNWARDLY FACING RELATIONSHIP CLOSELY ADJACENT A BOTTOM WALL OF SAID HEATING TANK AND TO POSITION SAID OUTLET TO DIRECT PORTIONS OF SAID

Claim 2

AN APPARATUS FOR REFINING USED LUBRICATING OIL COMPRISING IN COMBINATION: A HEATING TANK HAVING AN OPENING THROUGH A WALL THEREOF FOR RECEIVING A BATCH INCLUDING A CHARGE OF USED OIL TO BE REFINED AND A CHARGE OF OIL REFINING SOLIDS; AN ELECTRICALLY POWERED IMMERSION HEATER UNIT INCLUDING A PLURALITY BLADE HEATING ELEMENTS SUPPORTED TO EXTEND IMWARDLY THROUGH A WALL ON SAID HEATING TANK FOR HEATING SAID BATCH WHEREBY TO EFFECT HEAT PURIFICATION OF SAID USED OIL; A FIRST IMMERSION PUMP MEANS INCLUDING A PUMP HOUSING DEFINING AN INLET AND AN OUTLET; A MOUNTING PLATE FIXED TO A TOOP WALL OF SAID HEATING TANK FOR REMOVABLE SUSPENDING SAID PUMP HOUSING WITHIN SAID HEATING TANK TO POSITION SAID INLET IN A DOWNWARDLY FACING RELATIONSHIP CLOSELY ADJACENT A BOTTOM WALL OF SAID HEATING TANK AND TO POSITION SAID OUTLET TO DIRECT PORTIONS OF SAID

Claim 3

An apparatus for refining used lubricating oil comprising in combination: a heating tank having an opening through a wall thereof for receiving a batch including a charge of used oil to be refined and a charge of oil refining solids; an electrically powered immersion heater unit including a plurality of blade heating elements supported to extend inwardly through a wall of said heating tank for heating said batch whereby to effect heat purification of said used oil; a first immersion pump means including a pump housing defining an inlet and an outlet; a mounting plate fixed to a top wall of said heating tank for removably suspending said pump housing within said heating tank to position said inlet in a downwardly facing relationship closely adjacent a bottom wall of said heating tank and to position said outlet to direct portions of said batch, removed from adjacent said bottom wall through said inlet, upwardly within said heating tank for flow transversely of and in heat exchange surface scrubbing relationship with said blade elements; a clean oil storage tank including a filtering chamber enclosing filter means arranged above a clean oil storage chamber, said clean oil tank comprising a. an upwardly open tank portion defining said clean oil storage chamber; b. an essentially square shallow pan having a bottom wall formed with a central aperture and a side flange upstanding from marginal edges of said pan bottom wall, said tank portion being fixed to and extending vertically below said pan bottom wall in concentrically disposed flow communication with said central aperture; c. a support ring extending from an upper surface of said pan bottom wall concentrically outwardly of said central aperture; d. a sealing ring upstanding from an upper surface of said pan bottom wall vertically above said support ring and in engagement with the radially outer surface thereof; e. a disc shaped screen element supported by said support ring inwardly of said sealing ring; f. an essentially square sheet of filter paper removably supported on said screen element and extending horizontally outwardly of said sealing ring into proximity with said pan side flange; and g. a closure hingedly secured to said pan adjacent one marginal edge thereof for vertical swinging movement between closed and open positions, said closure having an annular sealing flange arranged to cooperate with said sealing ring to clampingly secure said sheet of filter paper therebetween, said closure and said screen element cooperating to define said filtering chamber; a transfer conduit having an inlet end communicating with the bottom of said heating tank and having an outlet end communicating with said filtering chamber through a central portion of said closure; second pump means disposed exteriorly of said heating and storage tanks; and a control system operable in succession to energize said first pump means and said heater unit to effect circulation of said batch and heat purification of said used oil within said heating tank and to thereafter selectively connect said second pump means to said clean oil storage chamber whereby to establish a vacuum therewithin for transferring said batch from said heating tank through said transfer conduit into said filtering chamber and for transferring clean oil from said filtering chamber through said filter paper and said screen element into said clean oil storage chamber, while said refining solids of said batch transferred to said filtering chamber are collected on said filter paper as a cake, said control system including temperature sensing means responsive to a predetermIned high temperature within said heating tank at which heat refining of said used oil is completed for deenergizing said heater unit to permit initiation of cooling of said heating tank and to connect said second pump means to said clean oil storage chamber, said temperature sensing means being responsive to reduction of temperature within said heating tank to a predetermined low temperature for deenergizing said first pump means and for disconnecting said second pump means from said clean oil storage chamber, said second pump means having an outlet thereof connected into said heating tank whereby to establish a continuous flow path, when said second pump means is connected to said clean oil storage chamber, successively through said second pump means, said heating tank, said transfer conduit, said filtering chamber, said cake, said filter paper, said screen element and said clean oil storage chamber, and said low temperature being correlated with the period of time said second pump means is connected to said clean oil storage chamber to insure drying of said cake by gas passing along said path.

Claim 4

An apparatus for refining used lubricating oil comprising in combination: a heating tank having an opening through a wall thereof for receiving a batch including a charge of used oil to be refined and a charge of oil refining solids; an electrically powered immersion heater unit including a plurality of blade heating elements supported to extend inwardly through a wall of said heating tank for heating said batch whereby to effect heat purification of said used oil; a first immersion pump means including a pump housing defining an inlet and an outlet; a mounting plate fixed to a top wall of said heating tank for removably suspending said pump housing within said heating tank to position said inlet in a downwardly facing relationship closely adjacent a bottom wall of said heating tank and to position said outlet to direct portions of said batch, removed from adjacent said bottom wall through said inlet, upwardly within said heating tank for flow transversely of and in heat exchange surface scrubbing relationship with said blade elements; a clean oil storage tank including a filtering chamber enclosing filter means arranged above a clean oil storage chamber, said clean oil tank comprising a. an upwardly open tank portion defining said clean oil storage chamber; b. an essentially square shallow pan having a bottom wall formed with a central aperture and a side flange upstanding from marginal edges of said pan bottom wall, said tank portion being fixed to and extending vertically below said pan bottom wall in concentrically disposed flow communication with said central aperture; c. a support ring extending from an upper surface of said pan bottom wall concentrically outwardly of said central aperture; d. a sealing ring upstanding from an upper surface of said pan bottom wall vertically above said support ring and in engagement with the radially outer surface thereof; e. a disc shaped screen element supported by said support ring inwardly of said sealing ring; f. an essentially square sheet of filter paper removably supported on said screen element and extending horizontally outwardly of said sealing ring into proximity with said pan side flange; and g. a closure hingedly secured to said pan adjacent one marginal edge thereof for vertical swinging movement between closed and open positions, said closure having an annular sealing flange arranged to cooperate with said sealing ring to clampingly secure said sheet of filter paper therebetween, said closure and said screen element cooperating to define said filtering chamber; a transfer conduit having an inlet end communicating with the bottom of said heating tank and having an outlet end communicating with said filtering chamber through a central portion of said closure; second pump means disposed exteriorly of said heating and storage tanks; and a control system operable in succession to energize said first pump means and said heater unit to effect circulation of said batch and heat purification of said used oil within said heating tank and to thereafter selectively connect said second pump means to said clean oil storage chamber whereby to establish a vacuum therewithin for transferring said batch from said heating tank through said transfer conduit into said filtering chamber and for transferring clean oil from said filtering chamber through said filter paper and said screen element into said clean oil storage chamber, while said refining solids of said batch transferred to said filtering chamber are collected on said filter paper as a cake, said control system including temperature sensing means responsive to a predetermIned high temperature within said heating tank at which heat refining of said used oil is completed for deenergizing said heater unit to permit initiation of cooling of said heating tank and to connect said second pump means to said clean oil storage chamber, said temperature sensing means being responsive to reduction of temperature within said heating tank to a predetermined low temperature for deenergizing said first pump means and for disconnecting said second pump means from said clean oil storage chamber, said second pump means having an outlet thereof connected into said heating tank whereby to establish a continuous flow path, when said second pump means is connected to said clean oil storage chamber, successively through said second pump means, said heating tank, said transfer conduit, said filtering chamber, said cake, said filter paper, said screen element and said clean oil storage chamber, and said low temperature being correlated with the period of time said second pump means is connected to said clean oil storage chamber to insure drying of said cake by gas passing along said path.