Pump adaptor

Abstract

A pump adaptor for on-the-go reducing the size of an inlet end of a utility pump having a static immersible one-way valve on an inlet end with the pump adaptor having a constricting band for forming a sealing surface with a portion of a pump barrel located downstream to the immersible one-way valve with the adaptor including a chamber for a static immersible one-way valve to enable reduction in the inlet to the utility pump without reducing the pump stroke capacity and without affecting the normal operation of the static one-way immersible valve.

1 . A one-piece cylindrical siphon pump adaptor for reducing the external size of a siphon pump access inlet without decreasing a pump stroke capacity comprising:
 a siphon pump constricting band having an internal sealing surface for forming a radially constricting pump barrel suction seal;   a one-way valve encapsulation band having a chamber therein for extending around a one-way valve without operational interference therewith; and   an inlet band having an opening therein for suction of a liquid therethrough.   
     
     
         2 . The one-piece cylindrical siphon pump adaptor of  claim 1  wherein the constricting band is radially elastically stretchable and the encapsulation band and the constricting band are located in a coaxially condition with respect to each other and an internal diameter D 5  of the encapsulation band is larger than an internal diameter D 4  of the constricting band. 
     
     
         3 . The one-piece cylindrical siphon pump adaptor of  claim 1  wherein the inlet band has an outside diameter D 6  less than an internal diameter D 5  of the encapsulation band. 
     
     
         4 . The one-piece cylindrical siphon pump adaptor of  claim 1  including an elongated suction tube suctionally sealed to the inlet band with the elongated tube having an outside diameter D 7  less than an internal diameter D 5  of the encapsulation band. 
     
     
         5 . The one-piece cylindrical siphon pump adaptor of  claim 1  including a first axial stop for preventing axial displacement of the adaptor in a first direction and a second axial stop for preventing axial displacement of the adaptor in the opposite direction. 
     
     
         6 . The one-piece cylindrical siphon pump adaptor of  claim 5  wherein the constricting band has a frusto conical outer surface; and a compression collar having an internal frusto conical surface for radially constricting the constricting band through axial displacement of the compression collar with respect to the frusto conical surface on the constricting band. 
     
     
         7 . The one-piece cylindrical siphon pump adaptor of  claim 1  wherein the adaptor comprise an elastomer and the encapsulation band is integral to the inlet band and the constricting band. 
     
     
         8 . The one-piece cylindrical siphon pump adaptor of  claim 4  wherein the elongated suction tube is suctionally sealable through frictional engagement with the inlet band and the inlet includes a set of buttresses for preventing suction collapse of said inlet band. 
     
     
         9 . The one-piece cylindrical siphon pump adaptor of  claim 1  wherein the resilient inlet band has sufficient radially stiffness to resist suction collapse when a liquid is drawn therethrough. 
     
     
         10 . A siphon utility pump comprising:
 a pump cylinder having an inlet end and, an outlet and a lumen therebetween;   a plunger slideable in the lumen with the plunger having a one-way valve thereon for drawing liquid through the pump cylinder;   a liquid immersible one-way valve located on the inlet end of the pump cylinder to enable a liquid to be suctioned through the liquid immersible one-way valve by stroking the plunger within the pump cylinder; and   an adaptor having a constricting band axially spaced from the inlet end with the constricting band sealingly engaging an exterior cylindrical surface of said pump cylinder, an encapsulation band for encapsulating the liquid immersible one-way valve, an inlet band proximate the liquid immersible one-way valve with the inlet band including a passage for suctioning of fluid through the inlet band and into proximity of the liquid immersible one-way valve.   
     
     
         11 . The siphon utility pump of  claim 10  including a friction ring having a frusto conical inner surface for radially compressing said constricting band into a suction seal with the pump cylinder. 
     
     
         12 . The siphon utility pump of  claim 10  including a set of axial stops for preventing displacement of the pump adaptor with respect to the liquid immersible one-way valve. 
     
     
         13 . The siphon utility pump of  claim 10  wherein the adaptor is one piece with the encapsulation band and the inlet band integral to the constriction band and the inlet band includes a suction tube frictionally secured to said adaptor with said suction tube having an external diameter less than the external diameter of said liquid immersible one-way valve. 
     
     
         14 . The method of converting a siphon utility pump having an immersible one-way valve to a siphon utility pump wherein the immersible one-way valve is remote from a liquid to be removed by the pump comprising;
 placing a sealing surface of an adaptor into a suction sealing engagement with an exterior surface of a pump barrel;   placing an encapsulation band of the pump adaptor circumferentially around the immersible one-way valve to form a suction chamber located proximate the one-way valve to thereby provide normal operation of the immersible one-way valve when the one-way valve is located above a liquid line.   
     
     
         15 . The method of  claim 14  including the step of resilient attachment of the pump adaptor to the utility pump during field use of the utility pump by radially expanding a constricting band on the adaptor to axially extend the sealing surface past the immersible one-way valve. 
     
     
         16 . The method of  claim 14  including the step of attaching a suction tube to an inlet extension on the pump adaptor wherein the suction tube has an outside diameter smaller than an outside diameter of the immersible one-way valve. 
     
     
         17 . The method of  claim 14  including the step of radially compressing the constriction band by axially sliding a collar over an exterior surface of the constricting band. 
     
     
         18 . The method of  claim 14  including the step of bringing an axial stop into engagement with an end frame of the one-way valve. 
     
     
         19 . The method of  claim 14  including the step of applying the pump adaptor to the pump without the aid of tools. 
     
     
         20 . The method of  claim 14  wherein the one-way immersible valve is located on an inlet end of the siphon utility pump and the sealing surface of the adaptor is axially spaced from the one-way valve. 
     
     
         21 . The method of  claim 20  including the step of attaching a suction tube to the adaptor when the suction tube having an outside diameter less than an outside diameter of the immersible one-way valve.