Abstract:
A two-way manually operated pump structure consisting of a pump body, a nozzle mount, a control ring mount, and other structural components that are assembled together, in which rotating the control ring mount shifts the air direction between them and thereby enables manual inflation and deflation operation.

Description:
BACKGROUND OF THE INVENTION 
     1) Field of the Invention 
     The invention herein relates to pumping device, specifically a two-way manually operated pump structure. 
     2) Description of the Prior Art 
     Since conventional hand-operated pumps now available are of one-way inflation designs, their scope of application is limited to pumping air. In other applications, such as the DIY automotive maintenance market, where a deflating vacuum is a daily necessity, existent hand-operated pumps are incapable of such a function. 
     In view of the said situation, the inventor of the invention herein conducted extensive research and experimentation based on many years experience gained in the production and sales of similar category products which culminated in the successful development of the practical invention herein. 
     SUMMARY OF THE INVENTION 
     The primary objective of the invention herein is to provide a two-way manually operated pump structure that is capable of both inflation and deflation tasks. 
     Therefore, based on the two-way manually operated pump structure of the invention herein, the present invention is comprised of: 
     A pump body having a handle at its exterior side that provides for manual gripping support, a piston chamber disposed lengthwise, the interior of the said piston chamber providing for the longitudinal excursion of a piston, a piston connecting rod at the center axial end of and, furthermore, coupled to the said piston, with the far extremity of the said piston connecting rod extending through the piston chamber exposed at its outer side. 
     A nozzle mount conjoined in an air-tight seal to the front end opening of the said piston chamber consisting of an intake passage and an exhaust passage formed lengthwise and, furthermore, independently in continuity with the said piston chamber, a unidirectional valve situated in a passage opening at the juncture of the said intake passage and the piston chamber that limits the admittance of air in the said piston chamber through the intake passage to a single direction, a unidirectional valve situated in a passage opening at the juncture of the exhaust passage and the piston chamber that limits the admittance of air in the piston chamber through the said exhaust passage to a single direction; furthermore, a pressure gauge is radially disposed in the upper side of the said nozzle mount and a nozzle projects lengthwise from its anterior extremity; the said nozzle consists of a vent tube that is in continuity lengthwise with internal pressure of the pressure gauge and a vent hole is radially and recessively formed through the interior section of the vent tube. 
     A drive mechanism consisting of a bracing fixture, a push handle, an elastic component, and a collapsible sleeve, of which the said bracing fixture is situated at an angle on the pump body such that the outer diameter of the handle at the opposite side is aligned with it and, furthermore, a pivot hole is formed in its lengthwise extremity; the said push handle has a top end equipped with a pin that is hinged to the said pivot hole, wherein a joint section disposed in the lateral portion has a pin for linkage and fastening to the said connecting rod extremity to enable the driving of and control over the forward and rearward excursion of the piston; the said elastic component is installed lengthwise over the outer diameter of the said piston connecting rod exposed at the outer surface of the pump body and provides the rebound force for the longitudinal movement of the piston; and the said collapsible sleeve is slipped lengthwise over the outer diameter of the said elastic component to provide for the protection of this area. 
     A control ring mount that provides for tight rotational conjoinment to the end surface of the said nozzle mount and has an axial hole at the center of its lengthwise end that is, furthermore, aligned with the outer diameter of the said nozzle, a circular slot recessively formed in alignment with the vent hole position of the nozzle and the internal diameter of the axial hole, and an intake port and an exhaust port recessively formed proximal to the nozzle mount at the lateral extremity of the control ring mount end surface that are respectively aligned with its intake passage and exhaust passage end positions, wherein the opposite end of the said intake port extends to the outer diameter and upper side of the said control ring mount such that it is in continuity with external air, while the opposite end of the said exhaust port is in continuity with the said circular slot such that air flows confluently within the said nozzle vent tube and the said circular slot. 
     Given the said assembly, the angular rotation and adjustment operation of the said control ring mount shifts the positions of the intake port and the exhaust port in its end surface aligned in an air-tight confluence with the intake passage and the exhaust passage formed lengthwise in the nozzle mount and changes the air admittance passage flow pattern orientation appropriate for the inflation or deflation. 
    
    
     To enable a further understanding by the examination committee of the objectives, features, and functions of the present invention, the brief description of the drawings below are followed by the detailed description of the invention herein. 
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is an isometric drawing of the most preferred embodiment of the invention herein. 
     FIG. 2 is a cross-sectional drawing of the most preferred embodiment of the invention herein. 
     FIG. 3 is an orthographic drawing of the invention herein, as viewed from a bottom perspective. 
     FIG. 4 is a cross-sectional drawing of the invention herein that illustrates the inflation operation. 
     FIG. 5 is a cross-sectional drawing of the invention herein that illustrates the deflation operation. 
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     Referring to FIG. 1, FIG. 2, FIG. 3, FIG. 4, and FIG. 5, the invention herein is a two-way manually operated pump structure comprised of a pump body  10 , a nozzle mount  20 , a drive mechanism  30 , and a control ring mount  40 , wherein: 
     The said pump body  10  is tube-shaped and has a handle  11  at the bottom side of its outer diameter that provides for manual gripping support, a piston chamber  12  disposed lengthwise, the interior of the said piston chamber  12  providing for the longitudinal excursion of a piston  13 , a piston connecting rod  14  at the center axial end of and, furthermore, coupled to the said piston  13 , with the far extremity  141  of the said piston connecting rod  14  extending through the piston chamber  12  exposed at the outer side of the pump body  10 . 
     The said nozzle mount  20  is tube-shaped and, as indicated in FIG. 4, FIG. 5, conjoined in an air-tight seal to the front end opening  121  of the said piston chamber  12  consisting of an intake passage  21  and an exhaust passage  22  formed lengthwise and, furthermore, independently in continuity with the interior section of the said piston chamber  12 , a unidirectional valve  211 A situated in a passage opening  211  at the juncture of the said intake passage  21  and the piston chamber  12  that limits the admittance of air in the said piston chamber  12  through the intake passage  21  to a single direction, a unidirectional valve  221 A situated in a passage opening  221  at the juncture of the exhaust passage  22  and the piston chamber  12  that limits the admittance of air in the piston chamber  12  through the said exhaust passage  22  to a single direction; furthermore, as indicated in FIG.  1  and FIG. 2, a pressure gauge  23  is radially disposed in the upper side of the said nozzle mount  20  and a nozzle  24  projects lengthwise from its anterior extremity  20 A; the said nozzle  24  consists of a vent tube  25  that is in continuity lengthwise with internal pressure of the pressure gauge  23 , a vent hole  26  is radially and recessively formed through the interior section of the vent tube  25 , and external threads  241  and a leak-proof ring  242  are respectively formed and placed at the front and rear outer diameter of its forward end. 
     The said drive mechanism  30  consists of a bracing fixture  31 , a push handle  32 , an elastic component  33 , and a collapsible sleeve  34 , of which the said bracing fixture  31  is situated at an angle on the pump body  10  such that the outer diameter of the handle  11  at the opposite side is aligned with it and, furthermore, a pivot hole  311  is formed in its lengthwise extremity; the said push handle  32  has a top end  321  equipped with a pin  322  that is hinged to the said pivot hole  311 , wherein a joint section  323  disposed in the lateral portion has a pin  324  for linkage and fastening to the said connecting rod  14  extremity  141  to enable the driving of and control over the forward and rearward excursion of the piston  13 ; the said elastic component  33  is installed lengthwise over the outer diameter of the said piston connecting rod  14  exposed at the outer surface of the pump body  10  and provides the rebound force for the longitudinal movement of the piston  13 ; and the said collapsible sleeve  34  is slipped lengthwise over the outer diameter of the said elastic component  33  to provide for the protection of this area. 
     The said control ring mount  40  is annular in shape and, as indicated in FIG. 4, has an axial hole  41  at the center of its lengthwise end that is, furthermore, aligned in continuity with the outer diameter of the said nozzle  24 , thereby providing for confluence with the said nozzle  24 , a circular slot  42  recessively formed in alignment with the vent hole  26  position of the nozzle  24  and the internal diameter of the axial hole  41 , and an intake port  43  and an exhaust port  44  recessively formed proximal to the nozzle mount  20  at the lateral extremity of the control ring mount  40  end surface that are respectively aligned with its intake passage  21  and exhaust passage  22  end positions, wherein the opposite end  431  of the said intake port  43  extends to the outer diameter and upper side of the said control ring mount  40 , as indicated in FIG. 3, such that it is in continuity with external air, while the opposite end  441  of the said exhaust port  44  is in continuity with the said circular slot  42  such that air flows confluently within the said nozzle  24  vent tube  25  and the said circular slot  42 ; furthermore, a fish eye concavity  411  is formed by radial distension at the front end of the said control ring mount  40  axial hole  41 , the said fish eye concavity  411  utilized to seat a locating nut  45  such that the external threads  241  along the outer diameter of the said nozzle  24  are fastened in an air-tight sealed conjoinment to the control ring mount  40  at the front end surface of the nozzle mount  20  and, furthermore, maintain an appropriate magnitude of rotational torque at a set angle of rotational movement. 
     Given the said assembly and the resultant two-way manually operated pump structure of the invention herein, as indicated in FIG.  1  and FIG. 3, since the end surface of the said control ring mount  40  is conjoined in an air-tight seal to the nozzle mount  20  and, furthermore, the intake port  43  and the exhaust port  44  in its end surface are respectively aligned in an air-tight confluence with the intake passage  21  and the exhaust passage  22  formed lengthwise in the nozzle mount  20 , the angular rotation and adjustment operation of the said control ring mount  40  shifts the positions of the aligned confluent ports and passages, and changes the air admittance passage flow pattern orientation appropriate for inflation or deflation, with the operation explained as follows: 
     When the user wants to execute general inflation tasks, as indicated in FIG. 4, the intake port  43  at the end surface of the said control ring mount  40  is in air-tight confluence with the nozzle mount  20  intake passage  21 , while its exhaust port  44  is positionally aligned in continuity with the said nozzle mount  20  exhaust passage  22 ; therefore, when the user grasps the handle  11  and operates the push handle  32  at its rear side by squeezing, the said piston  13  is impelled forward lengthwise by the coupled connecting rod  14  and, as a result, compresses air in the piston chamber  12  through the unidirectional valve  221 A situated in a single guided direction to the exhaust passage  22  of the nozzle mount  20  and the circular slot  42 , and then through the vent hole  26  contiguous with the said circular slot  42  to interior section of the vent tube  25 , following which the air is pumped lengthwise through the said nozzle  24  into the item to be inflated; during the said process, since the unidirectional valve  211 A situated in a passage opening  211  at the limits the admittance of air into the said piston chamber  12  to a single direction, external air is continuously drawn in from the opposite end  431  of intake port  43  in contact with air outside; as such, the reciprocal operation of the push handle  32  is capable of continuously pumping air until the desired inflation reading is shown on the pressure gauge  23 . 
     Conversely, when the user wants to execute general deflation tasks, as indicated in FIG.  1  and FIG. 5, since the said control ring mount  40  is of an adjustable arrangement, it is rotated to an indicator on the outer side demarking the inflation position, thereby shifting the intake port  43  and exhaust port  44  at its interior section from their said original positions; as such, the exhaust port  44  at the end surface of the said control ring mount  40  is in air-tight confluence with the nozzle mount  20  intake passage  21 , while its intake port  43  is positionally aligned in continuity with the said nozzle mount  20  exhaust passage  22 ; therefore, when the user grasps the handle  11  and operates the push handle  32  at its rear side by squeezing, the said piston  13  is impelled forward lengthwise by the coupled connecting rod  14  and, as a result, compresses air in the piston chamber  12  through the unidirectional valve  221 A in a single guided direction to the exhaust passage  22  of the nozzle mount  20 , with the air finally discharged from the confluent intake port  43  through its opposite end  431 ; as the piston  13  is continuously compressed and decompressed, the passage opening  211  situated inside the other unidirectional valve  211 A synchronously generates a vacuum suctioning force that simultaneously draws air into the said piston chamber  12  through the intake passage  21  confluent with the exhaust port  44 ; since the vent tube  25  and the vent hole  26  are in continuity with the exhaust port  44  during the suction process, air is drawn and guided synchronously through the nozzle  24  into the piston chamber  12 ; as such, the reciprocal operation of the push handle  32  is capable of continuously pumping out air until the desired deflation reading is shown on the pressure gauge  23 . 
     In summation of the foregoing section, the technical concept and original spatial arrangement of the two-way manually operated pump structure of the invention herein overcomes the conventional drawbacks and is capable of both inflation and deflation operation to provide a multi-functional hand operated pump that is performance-wise more practical than conventional structures.