Manually actuated pump

Abstract: A pump (10) comprising a body (30) with cylinder (34); means for securing said body (30) to a container (20); tube for communication between container and cylinder (34); first valve (80) for flow only from container (20) into cylinder (34); a piston (120) within cylinder (34); a hollow actuator stem (50) terminating in an orifice and said cylinder (34); a spring biasing said piston (20) into extended position; second one-way valve (112,129) enables product flow only from cylinder (34) into stem (50); one projection and overhang of locking means (150) extending outwardly from stem (50), other projection and overhang extending inwardly in relation to body (30); stem (50) being rotatable for rotating projection and overhang: a) out of alignment with other projection and overhang as to move stem (50) into a retracted position for product pumping; b) into alignment with other projection and overhang as to prevent movement of stem (50) into retracted position: c) into alignment with other projection and overhang for preventing movement of stem (50) into extended position.

Description: The invention is related to a manually actuated pump for dispensing a product disposed within a container as disclosed in the preamble of the claim. More particularly, this invention relates to a manually actuated pump for dispensing a product disposed within a container as disclosed in the preamble of the attached claim. A pump of this type is known from BE-A-893 291. This pump discloses a locking means, being a projection at the inner cylindrical wall of a dispensing head wherein said projection engages one axial groove which extends at its upper and lower end into a horizontal extension for said projection, so that the dispensing head can be locked in its retracted and extended position. A modification of this embodiment is also disclosed, wherein the projection could be projected from the pump stem and displacable in one or more grooves in the inner surface of a cylindrical body adjacent the pump stem. The present invention has the object to improve a pump of the above-mentioned known type in such a manner that the locking mechanism is internal the pump the pump body in such a manner that a contamination from product residue and the like is inhibited, whilst the actuator remains aligned during actuation by an operator. The invention achieves this improvement by the features as disclosed in the characterizing portion of the claim. Accordingly, the invention comprises locking means including a projection extending radially outward from the pump stem and an overhang extending radially inwardly relative to the internal pump cylinder of the pump body. The actuator is rotatable for rotating the projection of the pump stem out of alignment with the overhang for enabling the actuator to be moved from the extended position into a retracted position for pumping the liquid from the container for discharge from the nozzle. The actuator is rotatable in the extended position for rotating the projection of the pump stem into alignment with the overhang for preventing movement of the actuator. Furthermore, the actuator is rotatable in the depressed position for rotating the projection of the pump stem into alignment with the overhang for preventing movement of the actuator into the extended position. The overhang defines a first overhang surface and a second overhang surface. The actuator is rotatable in the extended position for rotating the projection of the pump stem into alignment with the first overhang surface of the overhang for preventing movement of the actuator in the extended position. The actuator is rotatable also in the retracted position for rotating the projection of the pump stem into alignment with the second overhang surface of the overhang for preventing movement of the actuator into the retracted position. The invention includes first and second stop means cooperating with the first and second overhang surfaces for limiting the rotational movement of the pump stem. The locking means comprises a sleeve disposed in the internal pump cylinder of the pump body with the overhang extending radially inwardly from the sleeve. The overhang comprises plural overhangs extending circumferentially about the sleeve defining a void therebetween. The actuator is rotatable for rotating the projection of the pump stem out of alignment with the overhang and into alignment with the void for enabling the projection to pass through the void to permit the actuator to be moved from the extended position into a retracted position for pumping the liquid from the container for discharge from the nozzle. BRIEF DESCRIPTION OF THE DRAWINGS For a fuller understanding of the nature and objects of the invention, reference should be made to the following detailed description taken in connection with the accompanying drawings in which: FIG. 1 is a partial isometric view of the improved manually actuated pump of the present invention secured to a container with an actuator located in an extended position; FIG. 2 is a partial isometric view of the improved manually actuated pump of FIG. 1 with the actuator located in a retracted position for dispensing liquid from the container; FIG. 3 is a partial isometric view of the improved manually actuated pump of FIGS. 1-2 with the actuator rotated to lock the actuator in the extended position; FIG. 4 is a partial isometric view of the improved manually actuated pump of FIGS. 1-2 with the actuator rotated to lock the actuator in the retracted position; FIG. 5 is a side sectional view of the improved manually actuated pump of FIGS. 1-4 with the actuator located in the extended position; FIG. 6 is a sectional view along line 6-6 in FIG. 5; FIG. 7 is a side sectional view similar to FIG. 5 with the actuator located in the retracted position; FIG. 8 is a sectional view along line 8-8 in FIG. 7; FIG. 9 is an enlarged partial side sectional view of the improved manually actuated pump of FIGS. 1-4 with the actuator being move into the retracted position; FIG. 10 is an enlarged partial side sectional view of the improved manually actuated pump of FIGS. 1-4 with the actuator being returned into the extended position; FIG. 11 is a partial cut away isometric view of a portion of sleeve shown in FIG. 6 illustrating an overhang and stops; FIG. 12 is a partial cut away isometric view of a portion of a pump stem of FIG. 6 illustrating projections; FIG. 13 is a sectional view along line 13-13 in FIG. 5 with the pump stem located in an operative position for enabling dispensing of the liquid from the container; FIG. 14 is a sectional view along line 14-14 in FIG. 13 illustrating the position of the projection relative to the overhang; FIG. 15 is a partial cut away isometric downward view of FIG. 13 illustrating the position of the first projection relative to the overhang; FIG. 16 is a sectional view similar to FIG. 13 with the pump stem locked in the extended position; FIG. 17 is a sectional view along line 17-17 in FIG. 16 illustrating the position of the projection relative to the overhang; FIG. 18 is a partial cut away isometric downward view of FIG. 16 illustrating the position of the first projection relative to the overhang; FIG. 19 is a sectional view similar to FIG. 13 with the pump stem locked in the retracted position; FIG. 20 is a sectional view along line 20-20 in FIG. 19 illustrating the position of the projection relative to the overhang; and FIG. 21 is a partial cut away isometric upward view of FIG. 19 illustrating the position of the projection relative to the overhang. Similar reference characters refer to similar parts throughout the several Figures of the drawings. DETAILED DISCUSSION FIG. 1 is a partial isometric view of the improved manually actuated pump 10 of the present invention for pumping a liquid 12 from a container 20. The container 20 comprises a container rim 22 defining a container opening 24 therein. The manually actuated pump 10 comprises a pump body 30 secured to the container 20 by a closure 40. A pump stem 50 has a first stem end 51 extending external the pump body 30 and a second stem end 52 extending internal the pump body 30 with an internal stem passage 54 extending through the pump stem 50. The first stem end 51 supports an actuator 60 having a nozzle 62 for communicating with the internal stem passage 54 extending through the pump stem 50. The first stem end 51 is received within an actuator aperture 64 communicating with the nozzle 62 of the actuator 60. The actuator 60 is shown being located in an extended position relative to the container 20. Although the improved manually actuated pump 10 has been shown as a vertical action pump with a finger actuator, is should be understood that the present invention may be incorporated into a trigger pump of various configurations or other types of manually operated pumps. FIG. 2 is a partial isometric view of the improved manually actuated pump of FIG. 1 with the actuator 60 located in a retracted position. As will be described in greater detail hereinafter, reciprocation of the actuator 60 between the extended position shown in FIG. 1 and the retracted position shown in FIG. 2 results in the pumping of the liquid 12 from the nozzle 62 for dispensing liquid 12 therefrom as shown in FIG. 2. FIG. 3 is a partial isometric view of the improved manually actuated pump 10 of FIGS. 1-2 with the actuator 60 being rotated to lock the actuator 60 in the extended position. In the extended locked position as shown in FIG. 3, the actuator 60 and the pump stem 50 are prevented from moving from the extended position to inhibit the pumping of the liquid 12 from the nozzle 62. FIG. 4 is a partial isometric view of the improved manually actuated pump 10 of FIGS. 1-2 with the actuator 60 being rotated to lock the actuator 60 in the retracted position. In the retracted locked position as shown in FIG. 4, the actuator 60 and the pump stem 50 are prevented from moving from the retracted position to inhibit the pumping of the liquid 12 from the nozzle 62. FIG. 5 is a side sectional view of the improved manually actuated pump 10 of FIGS. 1-4 with the actuator 60 being located in the extended position. FIG. 6 is a sectional view along line 6-6 in FIG. 5. FIG. 7 is a side sectional view similar to FIG. 5 with the actuator located in the retracted position with FIG. 8 being a sectional view along line 8-8 in FIG. 7. The improved manually actuated pump 10 comprises the pump body 30 having a first and a second body end 31 and 32 with an internal pump cylinder 34 extending therebetween. The internal pump cylinder 34 defines an internal pump cylinder wall 36. The pump body 30 includes a radially outwardly extending flange 38 integrally molded with the pump body 30. A vent opening 39 extends through the internal pump cylinder wall 36 of the pump body 30. A closure 40 defines a central opening 42 for enabling the first body end 31 of the pump body 30 to extend therethrough. The closure 40 is shown having closure threads 44 for securing with container threads (not shown) extending about the container rim 22 of the container 20 in a conventional fashion. The first body end 31 of the pump body 30 is received within the central opening 42 of the closure 40. The closure threads 44 of the closure 40 are affixable to the container threads (not shown) of the container 20 to secure the pump body 30 to the container 20. When the pump body 30 is secured to the container 20, the flange 38 of the pump body 30 engages with the container rim 22 of the container 20 to seal the pump body 30 to the container 20. Although the closure 40 has been shown attached to the container 20 through closure threads 44, it should be understood that various means may be utilized for securing the closure 40 to the container 20. A sleeve 70 disposed within the internal pump cylinder 34 defines a sleeve internal cylinder wall 71. A sleeve external cylinder wall 72 is provided with sleeve clasps 74 for engaging with pump body clasps 75 defined in the internal pump cylinder wall 36 of the pump body 30 for securing the sleeve 70 within the pump body 30. A collar 76 is integrally secured to the sleeve 70 for overlaying the first body end 31 of the pump body 30. The collar 76 also retains the closure 40 between the flange 38 and the collar 76. The engagement of the sleeve clasps 74 with pump body clasps 75 is adjustable for accommodating closure 40 of various wall thickness. An eduction tube 78 is frictionally secured into an eduction tube aperture 79 integrally molded into the second body end 32 of the pump body 30. The eduction tube 78 provides fluid communication between the liquid 12 within the container 20 and the internal pump cylinder 34 of the pump body 30. A first one-way valve means 80 is located proximate the second body end 32 of the pump body 30 for enabling the flow of the liquid 12 only from the container 20 into the internal pump cylinder 34 of the pump body 30. The first one-way valve 80 comprises a valve seat 82 shown as a cylindrical valve seat integrally molded with the pump body 30. The first one-way valve means 80 includes a movable valve member 84 for sealing with the valve seat 82. In this embodiment of the invention, the valve member 84 is shown as a ball valve for sealing with the valve seat 82. A spring 90 biases the valve member 84 into engagement with the valve seat 82. The spring 90 comprises a coil spring having a first portion 91, a second portion 92 and an intermediate portion 93. The intermediate portion 93 of the coil spring 90 has a smaller diameter relative to the second portion 92 of the coil spring 90. The second portion 92 of the spring 90 is sufficient in diameter to allow the valve member 84 to move linearly within the second portion 92 of the spring 90. The intermediate portion 93 of the spring 90 is sufficiently small in diameter to engage with the valve member 84. The second portion 92 of the spring 90 retains the valve member 84 within second portion 92 of the spring 90 while the intermediate portion 93 of the spring 90 biases the valve member 84 into sealing engagement with the valve seat 82. The pump stem 50 extends between the first stem end 51 disposed external the pump body 30 and the second stem end 52 disposed internal the pump body 30. Preferably, the first stem end 51 is frictionally secured within the actuator aperture 64 for enabling fluid communication from the first stem end 51 to the nozzle 62 through a nozzle channel 62A. The second stem end 52 of the pump stem 50 defines a narrowed stem end 100 for receiving the first portion 91 of the spring 90 for biasing the pump stem 50 into the extended position. The internal stem passage 54 extends between the first stem end 51 and the second stem end 52 of the pump stem 50. The internal stem passage 54 terminates in a plurality of stem passage input orifices including stem passage input orifices 101, 102 and 103 disposed in a stem recess 106 located proximate the second stem end 52 of the pump stem 50. The stem recess 106 is located between an annular stem ridge 108 defining a stem ridge diameter 108D and a stem shoulder 109. First and second stem valve seats 111 and 112 are defined in the pump stem 50. The first stem valve seat 111 is defined by the shoulder 109 of the pump stem 50. The second stem valve seat 112 is defined by the annular stem ridge 108. A piston 120 is slidably disposed within the internal pump cylinder 34 of the pump body 30 thereby dividing the internal pump cylinder 34 into a first internal pump cylinder 34A and a second internal pump cylinder 34B. The piston 120 comprises a generally rigid cylindrical portion 122 defining a central opening 124. An annular piston ridge 126 extends inwardly into the central opening 124 and defines a piston ridge diameter 126D. A first and a second piston valve surface 128 and 129 are located on the piston for cooperating respectively with the first and second stem valve seats 111 and 112. The first piston valve surface 128 is defined by an inner surface of the generally rigid cylindrical portion 122 whereas the second piston valve surface 129 is defined by the annular piston ridge 126 of the piston 120. A first and a second sealing skirt 131 and 132 are integrally formed with the piston 120 through an annular piston support 134. The first and second sealing skirts 131 and 132 are tapered as shown for enabling terminal ends 131A and 132A of the first and second sealing skirts 131 and 132 to frictionally engage with the internal pump cylinder wall 36 to form a slidable seal between piston 120 and the internal pump cylinder wall 36 of the internal pump cylinder 34. The outer diameter of the stem ridge diameter 108D of the stem ridge 108 is slightly greater in diameter than the internal diameter of the piston ridge diameter 126D of the piston ridge 126. The slightly greater stem ridge diameter 108D relative to the piston ridge diameter 126D enables the stem ridge 108 to be forcefully inserted into the central opening 124 of the piston 120 and passed through the piston ridge 126. The forceful insertion of the stem ridge 108 into the central opening 124 of the piston 120 deforms the generally rigid cylindrical portion 122 of the piston 120 enabling the stem ridge 108 to be forced passed the piston ridge 126. Upon the stem ridge 108 being forced passed the piston ridge 126, the piston 120 is slidably retained within the stem recess 106 of the pump stem 50. A second one-way valve means 140 comprises the first and second stem valve seats 111 and 112 of the pump stem 50 cooperating with the first and second piston valve surfaces 128 and 129 of the piston 120. The piston 120 being slidable within the stem recess 106 of the pump stem 50 enables the first and second stem valve seats 111 and 112 of the pump stem 50 to engage respectively, the first and second piston valve surfaces 128 and 129 of the piston 120. As the piston 120 slides within the stem recess 106 of the pump stem 50, the piston 120 can either cover or expose the stem passage input orifices 101-103 for opening and closing fluid communication into the internal stem passage 54 of the pump stem 50. The first piston valve surface 128 of the piston 120 forms a sliding seal with the first stem valve seats 111. In the unattended position as shown FIG. 5, the spring 90 biases the second stem valve seat 112 of the pump stem 50 into engagement with the second piston valve surface 129 of the piston 120 for inhibiting the flow of the liquid 12 from the second internal pump cylinder 34B into the internal stem passage 54 of the pump stem 50. When the actuator 60 is moved by an operator toward the retracted position as shown in FIG. 7, the frictionally engagement between the terminal ends 131A and 132A of the first and second sealing skirts 131 and 132 and the internal pump cylinder wall 36 initially immobilizes the piston 120 relative to the pump body 30. As the pump stem 50 moves relative to the piston 120, the second stem valve seat 112 of the pump stem 50 is displaced from the second piston valve surface 129 of the piston 120 for enabling the flow of the liquid 12 between the second internal pump cylinder 34B and the internal stem passage 54 of the pump stem 50. Continued movement of the pump stem 50 relative to the piston 120 results in the first stem valve seat 111 of the pump stem 50 slidably sealing with the first piston valve surface 128 of the piston 120 for inhibiting the flow of the liquid 12 from the second internal pump cylinder 34B into the first internal pump cylinder 34A. When the actuator 60 is released by an operator, the spring 90 moves the pump stem 50 toward the extended position as shown in FIG. 5. The frictionally engagement between the terminal ends 131A and 132A of the first and second sealing skirts 131 and 132 and the internal pump cylinder wall 36 again initially immobilizes the piston 120 relative to the pump body 30. As the pump stem 50 moves relative to the piston 120, the first stem valve seat 111 of the pump stem 50 slidably seals with the first piston valve surface 128 of the piston 120 for inhibiting the flow of the liquid 12 between the second internal pump cylinder 34B and the internal stem passage 54 of the pump stem 50. Continued movement of the pump stem 50 relative to the piston 120 results in the second stem valve seat 112 of the pump stem 50 being moved into engagement with the second piston valve surface 129 of the piston 120 as shown in FIG. 5 for inhibiting the flow of the liquid 12 from the second internal pump cylinder 34B into the internal stem passage 54. FIGS. 9 and 10 illustrate the pumping operation of the improved manually actuated pump 10 of the present invention. FIG. 9 illustrates the pump stem 50 moving toward the second body end 32 of the pump body 30 by the external force of an operator whereas FIG. 10 illustrates the pump stem 50 returning toward the first body end 31 of the pump body 30 by action of the spring 90. As the actuator 60 is depressed by an operator, the pump stem 50 moves toward the second body end 32 of the pump body 30 and the pump stem 50 moves relative to the piston 120. The second stem valve seat 112 is displaced from the second piston valve surface 129 for opening the stem passage input orifices 101-103 and the first stem valve seat 111 maintains the slidable seal with the first piston valve surface 128 to inhibit the flow of the liquid 12 from the second internal pump cylinder 34B into the first internal pump cylinder 34A. The first one-way valve means 80 remains in the closed position with the movable valve member 84 sealing with the valve seat 82. The movement of the pump stem 50 toward the second body end 32 of the pump body 30 reduces the volume of the second internal pump cylinder 34B to pump any liquid 12 within the second internal pump cylinder 34B into the internal stem passage 54 of the pump stem 50 as shown by the arrows in FIG. 9. The liquid 12 is pumped to the first stem end 51 and through the nozzle channel 62A for discharge from the nozzle 60. When the pump stem 50 is moved toward the second body end 32 of the pump body 30, the piston 120 uncovers the vent opening 39 extending through the internal pump cylinder wall 36 of the pump body 30. The vent opening 39 enables the venting of the container 20 from the ambient along a channel between the pump stem 50 and the internal pump cylinder wall 36. FIG. 10 illustrates the pump stem 50 returning toward the first body end 31 of the pump body 30 by action of the spring 90. As the actuator 60 is returned by the spring 90, the pump stem 50 moves toward the first body end 31 of the pump body 30 and the pump stem 50 moves relative to the piston 120. The first stem valve seat 111 maintains a sliding seal with the first piston valve surface 128 and closes the stem passage input orifices 101-103. The second stem valve seat 112 moves into engagement with the second piston valve surface 129 to inhibit the flow of the liquid 12 from the second internal pump cylinder 34B into the internal stem passage 54 of the pump stem 50. As the movement of the pump stem 50 continues, the piston 120 covers the vent opening 39 extending through the internal pump cylinder wall 36 of the pump body 30. The movement of the pump stem 50 toward the first body end 31 of the pump body 30 increases the volume of the second internal pump cylinder 34B to reduce the internal pressure therein. The reduced internal pressure in the second internal pump cylinder 34B moves the movable valve member 84 out of sealing engagement with the valve seat 82 to open the first one-way valve means 80. The opened first one-way valve means 80 enables the liquid 12 within the container 20 to pass through the eduction tube 78 to enter the second internal pump cylinder 34B as shown by the arrows in FIG. 10. The improved manually actuated pump 10 includes locking means 150 for locking the actuator 60 in the extended position as shown in FIG. 3 and for locking the actuator 60 in the retracted position as shown in FIG. 4. The locking means 150 comprises a projection shown as first and second projections 151 and 151A extending radially outwardly from the pump stem 50. The locking means 150 further comprises an overhang shown as first and second sleeve overhangs 161 and 161A extending radially inwardly relative to the internal pump cylinder 34 of the pump body 30. In this embodiment of the invention, first and second sleeve overhangs 161 and 161A extend radially inwardly from the sleeve internal cylinder wall 71 of the internal sleeve 70. FIG. 11 is a partial cut away isometric view of a portion of the internal sleeve 70 shown in FIG. 6 illustrating the first sleeve overhang 161 with the second sleeve overhang 161A being a mirror image thereof. The first sleeve overhang 161 defines a first and a second overhang surface 171 and 172. Each of the first and second sleeve overhangs 161 and 161A extends circumferentially through an angle of approximately 90 degrees about the internal sleeve 70. A first and a second void 201 and 202 is defined between the first and second sleeve overhangs 161 and 161A. First stops 181 and 181A extend radially inwardly and axially toward the first body end 31 of the pump body 30 for limiting the rotation of the pump stem 50 when the actuator 60 is in the extended position. Second stops 182 and 182A extend radially inwardly and axially toward the second body end 32 of the pump body 30 for limiting the rotation of the pump stem 50 when the actuator 60 is in the retracted position. FIG. 12 is a partial cut away isometric view of a portion of a pump stem 50 of FIG. 6 illustrating the first and second projections 151 and 151A extending radially outwardly from the pump stem 50. The first and second projections 151 and 151A are established to pass through the first and second voids 201 and 202 to circumvent the first and second overhangs 161 and 161A. FIG. 13 is a sectional view along line 13-13 in FIG. 5 with the pump stem 50 being located in an operative position for enabling dispensing of the liquid 12 from the container 20. FIG. 14 is a sectional view along line 14-14 in FIG. 13 whereas FIG. 15 is a partial cut away isometric downward view of FIG. 13. The actuator 60 is shown rotated with the first and second projection 151 and 151A of the pump stem 50 out of alignment with the first and second sleeve overhangs 161 and 161A. The first and second projections 151 and 151A are shown aligned with the first and second void 201 and 202 for enabling the first and second projections 151 and 151A to pass through the first and second voids 201 and 202, respectively. In this position of rotation of the actuator 60, the pump stem 50 may be reciprocated between the extended position and the retracted position for pumping the liquid 12 from the container 20 through the nozzle 62. FIG. 16 is a sectional view similar to FIG. 13 with the pump stem 50 being locked in the extended position for preventing movement of the actuator 60. FIG. 17 is a sectional view along line 17-17 in FIG. 16 whereas FIG. 18 is a partial cut away isometric downward view of FIG. 16. The actuator 60 is shown rotated in the extended position with the first and second projection 151 and 151A of the pump stem 50 in alignment with the first and second sleeve overhangs 161 and 161A. The first and second projections 151 and 151A are shown in alignment with the first overhang surfaces 171 and 171A for preventing movement of the actuator 60 toward the second body end 32 of the pump body 30. The first stops 181 and 181A limit a clockwise rotational movement in FIG. 16 upon the first and second projection 151 and 151A of the pump stem 50 respectively contacting the first stops 181 and 181A. The first and second projection 151 and 151A of the pump stem 50 are shown displaced from the first stops 181 and 181A for the sake of clarity in the various FIGS. of the drawings. When an operator desires to return the improved manually actuated pump 10 into the operative position shown in FIGS. 13-15, the actuator 60 is rotated counterclockwise in FIG. 16 to return to the operating position as shown in FIGS. 13-15. The first and second projections 151 and 151A of the pump stem 50 respectively contact the first stops 181A and 181 to limit the counterclockwise rotation of the pump stem 50 and to align the first and second projections 151 and 151A with the first and second void 201 and 202. When the first and second projections 151 and 151A are aligned with the first and second void 201 and 202, the first and second projections 151 and 151A to pass through the first and second voids 201 and 202 for enabling the pump stem 50 to be reciprocated for pumping the liquid 12 from the container 20 through the nozzle 62. FIG. 19 is a sectional view similar to FIG. 13 with the pump stem 50 being locked in the retracted position for preventing movement of the actuator 60. FIG. 20 is a sectional view along line 20-20 in FIG. 19 whereas FIG. 21 is a partial cut away isometric upward view of FIG. 19. The actuator 60 is shown rotated in the retracted position with the first and second projection 151 and 151A of the pump stem 50 in alignment with the first and second overhangs 161 and 162. The first and second projections 151 and 151A are shown in alignment with the second overhang surfaces 172 and 172A for preventing movement of the actuator 60 toward the first body end 31 of the pump body 30. The second stops 182 and 182A limit a clockwise rotational movement in FIGS. 16-18 upon the first and second projection 151 and 151A of the pump stem 50 respectively contacting the second stops 182 and 182A. When an operator desires to return the improved manually actuated pump 10 into the operative position shown in FIGS. 13-15, the actuator 60 is rotated counterclockwise in FIG. 19 to return to the operating position shown in FIGS. 13-15. The first and second projections 151 and 151A of the pump stem 50 respectively contact the second stops 182A and 182 to limit the counterclockwise rotation of the pump stem 50 and to align the first and second projections 151 and 151A with the first and second void 201 and 202. When the first and second projections 151 and 151A are aligned with the first and second void 201 and 202, the first and second projections 151 and 151A to pass through the first and second voids 201 and 202 for enabling the pump stem 50 to be reciprocated for pumping the liquid 12 from the container 20 through the nozzle 62. The improved manually actuated pump of the present invention provides a pump that is easy to lock in either the extended position or the retracted position. The sequence of locking the improved pump in the extended position is identical with the sequence to lock the improved pump in the retracted position. The actuator remains aligned during operation and may be locked and unlocked with a rotation of the actuator of only ninety degrees in contrast to threaded locking pumps of the prior art. The locking mechanism is internal to the pump body to inhibit contamination from product residue and the like. The number of the component parts of the improved manually actuated pump is small to reduce the material cost of the manually operated pump. The small number of component parts facilitates the assembly of the improved pump and does not appreciably increase the overall cost of the pump. The pump may be sealed and shipped by a manufacturer in either the extended locked position or the retracted locked position. The improved manually actuated pump may be then relocked and sealed in the extended position or the retracted position by the operator. An improved manually actuated pump is suitable for dispensing a wide variety of liquid including lotions, creams and the like. The present disclosure includes that contained in the appended claims as well as that of the foregoing description. Although this invention has been described in its preferred form with a certain degree of particularity, it is understood that the present disclosure of the preferred form has been made only by way of example and that numerous changes in the details of construction and the combination and arrangement of parts may be resorted to without departing from the scope of the invention, which is defined by the claim. 12 liquid 20 container 22 container rim 24 container opening 30 pump body 31 first body end 32 second body end 34 internal pump cylinder 34A first internal pump cylinder 34B second internal pump cylinder 36 internal pump cylinder wall 38 flange 39 vent opening 40 closure 42 central opeining 44 closure threads 50 pump stem 51 first stem end 52 second stem end 54 internal stem passage 60 actuator 62 nozzle 62A nozzle channel 64 actuator aperture 70 internal sleeve 71 sleeve internal cylinder wall 72 sleeve external cylinder wall 74 sleeve clasps 75 pump body clasps 76 collar 78 eduction tube 79 eduction tube aperture 80 first one-way valve means 82 first valve seat 84 first valve member (ball valve) 90 spring 91 first end 92 second end 93 intermediate portion; 100 narrowed stem end 101 stem passage input orifice 102 stem passage input orifice 103 stem passage input orifice 106 stem recess 108 stem ridge 108D stem redge diameter 109 stem shoulder 111 first stem valve seat 112 second stem valve seat 120 piston 122 cylindrical postion 124 central opening 126 piston ridge 128 first piston valve surface 129 second piston valve surface 131 first sealing skirt 132 second sealing skirt 134 piston support 140 second one-way valve means 150 locking means 151 first projection 151A second projection 161 first sleeve overhang 161A second sleeve overhang 171 first overhang surface 171A first overhang surface 172 second overhang surfaces 172A second overhang surfaces 181 first stop 181A first stop 182A second stop 182A second stop 201 first void 202 second void 250 pump stem 251 first stem end 252 second stem end 254 internal stem passage 260 actuator 262 nozzle 262A nozzle channel 264 actuator aperture

Claims: A manually actuated pump (10) for dispensing a product disposed within a container (20) having a rim (22) defining a container opening (24), comprising in combination: a) a pump body (30) having a first and a second body end (31, 32) with an internal pump cylinder (34) extending therebetween; b) a closure (40) having a rim and a central opening (42) for receiving said pump body (30) therein enabling said closure (40) to be affixed to said container (20); c) an eduction tube (78) affixed to said second body end (32) of said pump body (30) for providing fluid communication between the product within the container (20) and said internal pump cylinder (34) of said pump body (30); d) first one-way valve means (80) for enabling the flow of the product only from the container (20) into said internal pump cylinder (34) of said pump body (30); said first one-way valve (80) comprises a first valve seat (82) defined in said pump body (30); e) a movable first valve member (84) comprising a ball valve (84) for sealing with said first valve seat (82; a piston (120) slidably disposed within said internal pump cylinder (34) of said pump body (30); f) said piston (120) including an actuator stem (50; 250) having a first and a second stem end (51, 52; 251, 252) with an internal stem passage (54; 254) extending therein; g) said first stem end (51; 251) terminating in a terminal orifice disposed external said pump body (30) with said second stem end (52; 252) being disposed within said internal pump cylinder (34) of said pump body (30); h) a spring (90) extending for biasing said piston (120) into an extended position; i) second one-way valve means (140) comprising said piston (120) having a central opening (124) defining a second valve seat (112); j) said actuator stem (50) having a stem valve surface, said spring (90) biasing said stem valve surface of said actuator stem (50) into engagement with said second valve seat (112) of said piston (120) for enabling the flow of the liquid only from said internal pump cylinder (34) into said internal stem passage (54) of said actuator stem (50); k) locking means (150) comprising a projection and an overhang, said actuator stem (50) being rotatable in said extended position for rotating said projection for preventing movement of said actuator stem (50) into said retracted position; and said actuator stem (50) being rotatable in said retracted position for preventing movement of said actuator stem (50) into said extended position; characterized in that l) a sleeve (70) disposed in the pump cylinder (34) of the pump body (30) with the overhang (161) extending radially inwardly from the sleeve (70); m) said projection for locking the actuator (60) in the extended position and for locking the actuator (60) in the retracted position comprises first and second projections (151, 151A) extending radially outwardly from the pump stem (50); n) said overhang (161) comprises first and second sleeve overhangs (161, 161A) extending radially inwardly relative to the internal pump cylinder (34) of the pump body (30); o) said first and second sleeve overhangs (161, 161A) define a first and second overhang surfaces (171, 172); p) a first and second void (201, 202) is defined between the first and second sleeve overhangs (161, 161A); q) said first and second projections (151, 151A) extending radially outwardly from the pump stem (50) are established to pass through the first and second voids (201, 202) to circumvent the first and second overhangs (161, 161A); r) first stops (181, 181A) extend radially inwardly and axially toward the first body end (31) of the pump body (30) for limiting the rotation of the pump stem (50) when the actuator (60) is in the extended position; second stops (182, 182A) extend radially inwardly and axially toward the second body end (32) of the pump body (30) for limiting the rotation of the pump stem (50) when the actuator (60) is in the retracted position.

Inventors: MOORE DAVID G, MOORE, DAVID G.
Applicants: SEAQUIST PERFECT DISPENSING, SEAQUIST PERFECT DISPENSING GMBH
Application year: 1995
Main classification: B05B11
IPC codes: B05B11