referring particularly to fig1 through 7 , there is depicted a smoking device having a cylindrical housing 2 including an inlet end 4 and an outlet end 6 . within the housing 2 is a cylinder or plunger 8 . the cylinder or plunger is constructed from an expandable rubber or plastic material having an outer diameter slightly larger than the inner diameter of the cylindrical housing 2 . extending through the plunger 8 and outwardly beyond the outlet end of the housing , is an elongated reciprocatable hollow carbureting tube 10 threaded at the plunger end 12 . on both of the flat faces of the plunger , washers or disks 14 and 16 respectively are securely positioned thereto by threaded nuts 18 . at the end of the threaded carbureting tube is a rubber stop member 20 to cushion the contact of the plunger when it reaches the cylindrical housing &# 39 ; s limit . the other end of the reciprocatable hollow carbureting tube 10 passes through a central opening 22 bored in a cover or cap 24 which closes the outlet end 6 of the cylindrical housing 2 . the cover or cap and the carbureting tube 10 are separated by a nylon or teflon &# 34 ; o &# 34 ; ring 26 to provide a sealed environment therebetween and to provide a smooth lubricating surface for the carbureting tube 10 as it is slid in and out . the outlet end of the carbureting tube is threaded and fitted with a matching threaded removable mouth piece 28 . preferrably the mouth piece 28 is fitted along it &# 39 ; s inner wall with a filter - like substance 29 ( fig5 ), to capture impurities or other unwanted materials . the cap or cover 24 contains one or more vent holes 30 to permit air to escape from the housing &# 39 ; s air chamber 32 during the suction stroke of plunger 8 . the suction stroke is defined as the movement of the plunger 8 when the plunger is pulled toward the outlet end 6 of the cylindrical housing 2 . the inlet end 4 of the cylindrical housing 2 is fitted with a second cap or cover 34 having an off center bored opening 36 ( fig3 ). a combustion base member 38 is held to the cap 34 by a finger bolt 40 extending through a central opening 41 bored through the base member 38 and in communication with centrally bored opening 39 in cap 34 . the base member 38 and cap 34 are secured thereto by nut 42 . the combustion base member contains a bored bowl 44 holding a screen base 52 in which the materials to be burned are placed . the bottom of the bowl is in communication with a right - angled channel or conduit 46 opening against the outside face of cap 34 . upon loosening of the finger bolt 40 , the combustion base may be rotated to permit the right - angled conduit 46 to match and communicate with the opening 36 of cap 34 as shown in fig3 . this permits the smoke generated by the burning of a substance in bowl 44 to pass through the right - angled conduit 46 and opening 36 into the smoke dilution chamber 48 formed when the plunger is moved towards the outlet 6 of housing 2 . as the plunger moves towards the outlet , with the outlet of the carbureting tube being closed , a suction is created . this is referred to as the plunger &# 39 ; s suction thrust . the smoke is then drawn from the bowl and into the smoke dilution chamber . the amount of suction can be reduced by permitting some air to enter through the carbureting tube 10 by reducing the finger pressure exerted on the mouthpiece 28 carried on the outlet opening 27 . the finger thereby functions as a bleeder valve . when the plunger has been extended the desired distance , the finger bolt 40 is loosened and the combustion base member is rotated , disrupting the communication between the right - angled channel and opening 36 causing the flow of smoke to cease . the finger bolt 40 is then tightened and the expulsion stroke may be initiated by removing the finger from the mouthpiece and pushing the plunger 8 toward the inlet end 4 . to permit the plunger 8 to move freely within the cylindrical housing 6 , vent holes 30 , as previously noted , are available to permit the ingress and egress of air from the air chamber 32 . as the plunger is moved toward the inlet end 4 of the housing , air is taken into the air chamber . as the plungers direction is reversed , air is expelled from the air chamber . referring to fig6 and 7 , it can be seen that the second cap 34 contains a circular groove 49 for receiving a heat gasket 50 . this insures sealing and prevents smoke from seeping out to the atmosphere during the expulsion or exhaustion stroke and prevents undesirable air from seeping into the smoke dilution chamber during the vacuum stroke . in another embodiment of this invention , the basic elements heretofore described are incorporated herein . in addition , a water chamber is included along with a more sophisticated type of valve system . referring now to fig8 and 9 , it can be seen that this embodiment incorporates a cylindrical housing 55 , a plunger 57 connected to a carbureting tube 59 and a combustion chamber 61 . the plunger 57 separates the housing into a smoke dilution chamber 63 and an air chamber 65 . a feature that was not included in the first embodiment , but which is included in this embodiment , is a water chamber 67 . the valving system 69 used in this embodiment is more intricate . in this embodiment , a valve cup 71 is secured to an elongated conduit 73 which , when in a closed position , is in sealing communication with a valve slot 75 . by turning the bowl counterclockwise , the valve cup 71 is separated from the valve slot 75 permitting communication between the combustion chamber 61 and the water chamber 67 through the elongated conduit 73 . the smoke having passed into the water chamber is pulled into the smoke dilution chamber 63 as the carbureting tube 59 is pulled upwardly with a finger on the mouthpiece 77 connected to the carbureting tube by an intermediate hose 79 . the water - cooled smoke passes into the smoke dilution chamber through openings 81 contained in a splash plate 83 which separates the water chamber 67 from the smoke dilution chamber 63 . a spring 85 is also provided as a stop member to cushion contact between the end of the carbureting tube and the splash plate 83 . the remaining elements used in this embodiment are essentially the same as the first embodiment , and therefore shall not be further described . referring now to fig1 which shows a sectional view of another embodiment which is similar to the embodiment just described . in this embodiment , the smoking device includes a cylindrical housing 89 having a closed top section 91 and a closed bottom section 93 connected for communication by a intermediate slidable passageway 95 . a plunger 97 is carried within the closed top section 91 of the cylindrical housing 89 to provide an air chamber 99 and a smoke dilution chamber 101 . a carbureting tube 103 passes through the air chamber 99 and fixed to the plunger 97 . the inlet end 105 of the carbureting tube 103 is in communication with the smoke dilution chamber 101 . the plunger is capable of up and down movement as described in the other embodiments . a combustion chamber 107 in communication with a water chamber 109 , is also provided . an on - off valving system which is shown generally by 111 , is also included . with this system , combustion gases may be drawn from the combustion chamber 107 through water in the water chamber 109 and into the smoke dilution chamber 101 through the intermediate passageway 95 . the inlet end 113 of the passageway 95 , as shown in fig1 , is blocked as it is in closed contact with a rubber stopper 115 . the passageway may be opened by slidably pulling the closed top section 91 of the cylindrical housing 89 away from the bottom section 93 , and thereby separating the stopper 115 from the inlet opening 113 , as may be noted in fig1 . the intermediate passageway 95 is fixed to the top section and slidably held by the bottom section to permit the two sections ( cylindrical housings ) to be moved apart at about it &# 39 ; s mid - point 117 . the remaining elements shown in fig1 are essentially the same as the elements heretofore described in the previous embodiments . the invention and its attendant advantages have been described in the foregoing description and specific references to the drawings . however , it should be understood that certain changes in form , construction , or arrangement may be made without departing from the spirit and scope as the above description is by way of example only . the restrictive scope of this invention is to be governed only by the claims recited below
a smoking device is disclosed whereby smoke and other gases of combustion can be diluted with air to a pre - selected mixture before being inhaled by a smoker . this is achieved by the use of a carbureting tube which can introduce a metered amount of air into a smoke chamber and thereby dilute the smoke to any desired concentration . the smoke is drawn into the smoke dilution chamber by a piston moving towards the outlet end of the chamber , and then pumped out of the smoke dilution chamber by reversing the motion of the piston . a water chamber may also be included to permit the smoke and other gases to be cooled prior to entering the smoke dilution chamber .