Displacement pump mounting and retention

Abstract

A displacement pump includes a pump body and a piston at least partially disposed in the pump body, the piston configured to reciprocate on an axis to pump fluid. A pump mount is disposed on the pump body and is configured to form a static connection to support the pump body with the pump mounted in a pumping assembly. The pump mount includes a lower ring that is movable relative to the pump body. The pump mount further includes a mount plate that supports the pump body.

Description

[0001] DISPLACEMENT PUMP MOUNTING AND RETENTION

[0002] CROSS-REFERENCE TO RELATED APPLICATION(S)

[0003] This application claims priority to U.S. Provisional Application No. 63 / 610,261 filed December 14, 2023 and entitled “DISPLACEMENT PUMP MOUNTING AND RETENTION,” and claims priority to U.S. Provisional Application No. 63 / 556,661 field February 22, 2024 and entitled “DISPLACEMENT PUMP MOUNTING AND RETENTION,” the disclosures of which are hereby incorporated by reference in their entireties.

[0004] BACKGROUND

[0005] The present disclosure relates generally to fluid pumping systems and parts thereof. More particularly, this disclosure relates to mounting of displacement pumps.

[0006] Fluid sprayers include pumps that pressure spray fluid and drive the spray fluid to a nozzle for outputting the spray fluid as an atomized fluid spray. Fluid sprayers include spray guns that can be held and manipulated by the user. The spray guns typically receive paint or other coating fluid under pressure and atomize the spray fluid. The spray fluid is typically put under pressure by a piston or diaphragm, which is referred to as airless spray.

[0007] Airless spray can typically range in pressure from about 500 pounds per square inch (psi) (about 3.45 Megapascal (MPa)) to about 7000 psi (about 48.26 MPa), however lower and higher pressures are possible. Due to the action of the piston or the diaphragm, uneven spray patterns can be developed, particularly on stopping and starting of spray or due to cyclical directional reversing of the piston or diaphragm. For example, internal chambers within the flowpath may contain pockets of spray fluid through which pressure waves can reverberate or otherwise echo and cause uneven spray patterns.

[0008] SUMMARY

[0009] According to an aspect of the disclosure, a displacement pump includes a pump body; a piston at least partially disposed in the pump body, the piston configured to reciprocate on a pump axis to pump fluid through the pump body; and a pump mount disposed on the pump body and configured to form a static connection to support the pump body. The pump mount includes a lower ring movable along the pump body; and an upper support disposed on the pump body, the upper support including a mount plate.

[0010] According to an additional or alternative aspect of the disclosure, a pumping assembly includes an assembly body having a mounting cavity; a motor disposed within the assembly body and configured to generate a rotational output; a drive connected to the motor to receive the rotational output from the motor, the drive configured to convert the rotational output to linear reciprocating motion, the drive including a receiving slot; and a displacement pump. The displacement pump includes a pump body; a piston at least partially disposed in the pump body, the piston configured to reciprocate on a pump axis to pump fluid through the pump body, the piston including a neck having a neck width and a head having a head width greater than the neck width; and a pump mount disposed on the pump body and configured to interface with the assembly body to support the pump body on the assembly body. The pump mount includes a lower ring movable along the pump body; and an upper support disposed on the pump body, the upper support including a mount plate. The displacement pump is configured to mount to the assembly body by a portion of the assembly body being received in a gap between the lower ring and the mount plate and is the displacement pump is configured to mount to the drive by the head of the piston being received in the receiving slot.

[0011] According to another additional or alternative aspect of the disclosure, a displacement pump includes a pump body; a piston at least partially disposed in the pump body, the piston configured to reciprocate on a pump axis to pump fluid through the pump body; and a pump mount disposed on the pump body and configured to form a static connection to support the pump body. The pump mount includes a lower ring movable along the pump body; and an upper support disposed on the pump body. The upper support includes a mount plate, wherein a gap is formed between the mount plate and the lower ring; and a mount retainer, the mount retainer connected to the pump body and securing the mount plate on the pump body.

[0012] According to yet another additional or alternative aspect of the disclosure, a displacement pump includes a pump body; a piston at least partially disposed in the pump body, the piston configured to reciprocate on a pump axis to pump fluid through the pump body; and a pump mount disposed on the pump body and configured to form a static connection to support the pump body. The pump mount includes a lower ring movable along the pump body, the lower ring including a plurality of projections extending outward from a body of the lower ring; an upper support disposed on the pump body, the upper support including a mount plate; and a ring lock that is at least partially disposed in a space between the plurality of projections such that the ring lock prevents rotation of the lower ring relative to the pump body.

[0013] BRIEF DESCRIPTION OF THE DRAWINGS

[0014] FIG. 1 is a simplified block diagram of a pumping system. FIG. 2A is an isometric view of a pumping assembly.

[0015] FIG. 2B is a partially exploded view of a pumping assembly.

[0016] FIG. 3A is an enlarged isometric view of a front end of a pumping assembly showing a pump mounted to the pumping assembly.

[0017] FIG. 3B is an enlarged isometric view of the front end of the pumping assembly similar to FIG. 3A but showing the pump dismounted from the assembly body.

[0018] FIG. 3C is an enlarged isometric view of the front end of the pumping assembly from a bottom side of the assembly body with the pump removed for clarity.

[0019] FIG. 4A is an isometric view of a pump.

[0020] FIG. 4B is an isometric view of the pump showing an upper support exploded away from the pump body.

[0021] FIG. 4C is a top plan view of the pump.

[0022] FIG. 4D is a side elevational view of the pump.

[0023] FIG. 5A is an isometric view of a mount plate.

[0024] FIG. 5B is an elevational view of a pump body.

[0025] FIG. 6 is a first isometric view of a portion of a pump showing a pump mount of the pump.

[0026] DETAILED DESCRIPTION

[0027] The present disclosure relates to displacement pumps for pumping systems. Pumps according to the present disclosure can be utilized in spray systems, such as for spraying paint, varnish, water, oil, stains, finishes, aggregate, coatings, and solvents, amongst other options, onto a substrate. Pumps according to the present disclosure are configured to mount by a static interface and a dynamic interface. The static interface supports the pump body. The dynamic interface drives reciprocation of a fluid displacer of the pump to cause pumping by the pump. The pump includes a pump mount that interfaces with a pump support to form the static interface. The pump mount is configured to mount to an assembly body of the pumping assembly by lateral displacement of the pump. The pump can shift radially relative to a reciprocation axis of the fluid displacer to mount to the assembly body. The pump mount includes a mount plate that spreads the loads experienced during pumping, providing for a robust and sturdy static interface supporting the pump.

[0028] According to aspects of the disclosure, a pump mount is configured to mount a displacement pump by a static interface. The pump mount includes a ring that shifts relative to a pump body of the pump to secure or release the static interface. The pump mount includes a ring lock that maintains the ring in a secured state in which the static interface is maintained. The ring lock prevents inadvertent loosening of the ring, such as due to vibrations experienced during pumping.

[0029] Components can be considered to radially overlap when those components are disposed at common axial locations along an axis and such that a line extending radially from the axis will extend through each of the radially overlapping components. Components can be considered to axially overlap when those components are disposed at common radial and circumferential locations relative to an axis such that an axial line parallel to the axis extends through each of the axially overlapping components. Components can be considered to circumferentially overlap when aligned about the axis at a common radial distance from the axis such that a circle centered on the axis passes through each of the circumferentially overlapping components.

[0030] FIG. 1 is a simplified block diagram of fluid pumping system 10. Fluid pumping system 10 includes pumping assembly 12, reservoir 14, supply line 16, and spray gun 18. Pumping assembly 12 includes assembly body 20, stand 22, pump 24, motor 26, drive 28, and controller 30. Stand 22 includes supports 32. Pump 24 includes pump body 34 and piston 36. Controller 30 includes control circuitry 38, memory 40, and user interface 42. Spray gun 18 includes gun handle 44, trigger 46, and nozzle 48.

[0031] Fluid pumping system 10 is configured to displace a fluid under pressure to a location downstream of pump. In the example shown, fluid pumping system 10 can also be considered to form a fluid spraying system as the downstream location is spray gun 18 that is configured to output sprays of the pumped fluid for application on a target substrate. It is understood, however, that not all examples are so limited and fluid pumping system 10 can be utilized to pump fluid to locations other than a spray gun 18.

[0032] Pumping assembly 12 is configured to draw a fluid (e.g., paint, varnish, water, oil, stains, finishes, aggregate, coatings, and solvents, amongst other options) from reservoir 14 and drive the fluid to spray gun 18 under pressure for spraying by spray gun 18. Fluid pumping system 10 can be an airless spray system in that fluid pumping system 10 does not rely on pressurized air to shape or atomize the fluid spray. Instead, pump 24 generates sufficient pressure to cause nozzle 48 to atomize the fluid into the fluid spray. Pumping system 10 can also be referred to as a fluid spraying system. Pumping assembly 12 can also be referred to as a fluid sprayer.

[0033] Stand 22 supports other components of pumping assembly 12 relative to a support surface, such as a floor or the ground. Stand 22 is formed by one or more supports 32 that extend vertically relative to assembly body 20 and contact the support surface. Supports 32 can be formed by legs, rails, etc. Supports 32 are shown as extending from assembly body 20 proximate a front end of assembly body 20 (the side including pump 24) and a rear end of assembly body 20 opposite the front end. It is understood, however, that some examples of stand 22 include supports 32 extending from proximate the rear end of assembly body 20 only. For example, supports 32 can include a vertically-extending portion extending from assembly body 20 and a horizontal portion contacting the support surface. In some examples, stand 22 can include one or more wheels that contact the ground surface to facilitate moving of pumping assembly 12, such as around a job site.

[0034] Assembly body 20 is supported by stand 22 vertically above the support surface. Assembly body 20 supports and can enclose one or more components of pumping assembly 12. Pump 24 is supported by assembly body 20. Pump 24 can be removably connected to assembly body 20 such that pump 24 can be removed from assembly body 20 for servicing, storage, replacement, etc. Pump body 34 is connected to assembly body 20, such as by a clamp, support (e.g., ring or flange), interfaced threading, among other mounting options. Piston 36 is at least partially disposed within pump body 34 and is configured to reciprocate along an axis (axis PA in FIG. 1) to pump the fluid from reservoir 14 to the downstream location. It is understood that pump 24 can be of any form suitable for pumping the fluid to spray gun 18 under pressure for spraying. In some examples, pump 24 is a double displacement pump such that pump 24 outputs fluid during both an up or suction stroke of piston 36 and a down or pressure stroke of piston 36.

[0035] Motor 26 is operatively connected to pump 24 to cause pumping by pump 24. Motor 26 is disposed at least partially within assembly body 20. Motor 26 can be disposed fully within assembly body 20. Motor 26 is an electric motor in the example shown. For example, motor 26 can be a brushed or brushless direct current (DC) motor, an alternating current (AC) induction motor, among other options. Motor 26 is operably connected to piston 36 to drive reciprocation of piston 36 along pump axis PA to cause pumping by pump 24. Pump axis PA can be a vertical axis, among other options.

[0036] In the example shown, motor 26 and drive 28 cause reciprocation of piston 36. Motor 26 is connected to drive 28 and is configured to provide a rotational output to drive 28. Drive 28 is at least partially disposed within assembly body 20 and is configured to convert the rotational output from motor 26 into a linear reciprocating input to piston 36. Drive 28 can be of any form suitable for converting the rotational output to a linear reciprocating input, such as a cam, scotch yoke, eccentric crank, ball screw, among other options. Controller 30 is operatively connected to motor 26 to control operation of motor 26 and thus control pumping by pump 24. Controller 30 can include one or more processors for carrying out the functions described herein. Controller 30 can be at least partially disposed within assembly body 20 or may be separate from assembly body 20. Controller 30 is operatively connected to other components of fluid pumping system 10 to control operation of the other components of fluid pumping system 10. Controller 30 is configured to store software, implement functionality, and / or process instructions. Controller 30 is configured to perform any of the functions discussed herein, including receiving an output from any sensor referenced herein, detecting any condition or event referenced herein, and controlling operation of any components referenced herein. Controller 30 can be of any suitable configuration for controlling operation of components of fluid pumping system 10 (e.g., motor 26), receiving signals from components of fluid pumping system 10 (e.g., a pressure transducer, a flow sensor, among other options), gathering data, processing data, etc. Controller 30 can include hardware, firmware, and / or stored software, and controller 30 can be entirely or partially mounted on one or more circuit boards. Controller 30 can be of any type suitable for operating in accordance with the techniques described herein.

[0037] Control circuitry 38, in one example, is configured to implement functionality and / or process instructions. For example, control circuitry 38 can be capable of processing instructions stored in memory 40. Examples of control circuitry 38 can include one or more of a processor, a microprocessor, a controller, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other equivalent discrete or integrated logic circuitry. Control circuitry 38 can be entirely or partially mounted on one or more circuit boards.

[0038] Memory 40 can be configured to store information before, during, and / or after operation. Memory 40, in some examples, is described as computer-readable storage media. In some examples, a computer-readable storage medium can include a non- transitory medium. The term “non-transitory” can indicate that the storage medium is not embodied in a carrier wave or a propagated signal. In certain examples, a non-transitory storage medium can store data that can, over time, change (e.g., in RAM or cache). In some examples, memory 40 is a temporary memory, meaning that a primary purpose of memory 40 is not long-term storage. Memory 40, in some examples, is described as volatile memory, meaning that memory 40 does not maintain stored contents when power to controller 30 is turned off. Examples of volatile memories can include random access memories (RAM), dynamic random access memories (DRAM), static random access memories (SRAM), and other forms of volatile memories. In some examples, memory 40 is used to store program instructions for execution by control circuitry 38. Memory 40, in one example, is used by software or applications to temporarily store information during program execution. Memory 40 can be configured to store larger amounts of information than volatile memory. Memory 40 can further be configured for long-term storage of information. In some examples, memory 40 includes non-volatile storage elements. Examples of such non-volatile storage elements can include magnetic hard discs, optical discs, flash memories, or forms of electrically programmable memories (EPROM) or electrically erasable and programmable (EEPROM) memories.

[0039] User interface 42 is configured to receive inputs from a user to provide to controller 30 and / or provide outputs to the user. User interface 42 can be any graphical and / or mechanical interface that enables user interaction with controller 30. For example, user interface 42 can implement a graphical user interface displayed at a display device of user interface 42 for presenting information to and / or receiving input from a user. User interface 42 can include graphical navigation and control elements, such as graphical buttons or other graphical control elements presented at the display device. User interface 42, in some examples, includes physical navigation and control elements, such as physically actuated buttons or other physical navigation and control elements. For example, user interface 42 can be or include a dial, slider, one or more buttons, etc. In general, user interface 42 can include any input and / or output devices and control elements that can enable user interaction with controller 30. In some examples, user interface 42 is configured to receive an output setting from a user. The output setting sets a target output parameter for the fluid output by fluid pumping assembly, such as a target pressure or a target flow rate, among other options. User interface 42 can be disposed on or form a portion of an exterior of assembly body 20.

[0040] Transducer 50 is configured to provide information regarding one or more parameters of the fluid output by pumping assembly 12. For example, transducer 50 can be configured as a pressure sensor configured to provide pressure information to controller 30, transducer 50 can be a flow sensor configured to provide flow rate information to controller 30, transducer 50 can include both pressure and flow sensing elements to provide both pressure and flow rate information to controller 30, among other options. Transducer 50 can also be referred to as a sensor.

[0041] Motor sensor 51 is configured to provide information regarding one or more operating parameters of the motor 26 to controller 30. For example, motor sensor 51 can be a speed sensor configured to generate information regarding the rotational speed of a rotor of the motor 26. For example, motor sensor 51 can be one or more hall effect sensors, an encoder, etc.

[0042] Spray gun 18 is configured to emit the spray fluid as an atomized fluid spray through nozzle 48. Trigger 46 is operatively connected to a valve (not shown) within spray gun 18 to open and close the flowpath through nozzle 48. The user can grasp gun handle 44 with a single hand and manipulate the orientation of spray gun 18 to aim spray gun 18. The user can actuate trigger 46 with the hand grasping gun handle 44 to control spraying by spray gun 18.

[0043] During operation, controller 30 provides commands to motor 26 to cause operation of motor 26. For example, controller 30 can command motor 26 to operate to cause pump 24 to displace fluid from reservoir 14 and through supply line 16 based on an input from transducer 50 indicating that pumping is required. For example, transducer 50 can provide pressure information indicating a drop in fluid pressure, indicative of spray gun 18 being actuated to output the fluid.

[0044] Motor 26 generates a rotational output that is provided to drive 28. Drive 28 is driven by motor 26 and outputs linear reciprocating motion to piston 36. Piston 36 reciprocates on pump axis PA to draw fluid from reservoir 14 and drive the fluid downstream through supply line 16. To cause spraying, the user actuates trigger 46 to open the valve in spray gun 18 and the fluid is emitted through nozzle 48 as an atomized fluid spray.

[0045] FIG. 2A is an isometric view of pumping assembly 12. FIG. 2B is a partially exploded view of pumping assembly 12 showing guard 52 and pump 24 with suction tube 54 attached to pump 24 and both pump 24 and suction tube 54 exploded away from assembly body 20. FIGS. 2 A and 2B are discussed together. Assembly body 20, stand 22, pump 24, suction tube 54, and control assembly 56 of pumping assembly 12 are shown. Assembly body 20 includes pump support 58 and housing 60. Stand 22 includes supports 32 and wheels 62. Pump body 34 and pump mount 64 of pump 24 are shown.

[0046] Pumping assembly 12 is configured to draw fluid from a reservoir (e.g., reservoir 14 (FIG. 1)) and drive the fluid to a downstream location (e.g., spray gun 18 (FIG. 1)) under pressure. Assembly body 20 encloses various other components of pumping assembly 12 and can support various components of pumping assembly 12. Housing 60 forms at least a portion of the exterior of pumping assembly 12. Motor 26 and drive 28 are each at least partially disposed within housing 60. Pump support 58 is configured to interface with pump 24 to support pump 24 on assembly body 20. For example, pump support 58 can be fully or partially formed by a portion of a frame of the assembly body 20, the frame at least partially disposed within housing 60. In the example shown, a portion of assembly body 20 extends into a gap formed by pump mount 64 of the pump 24 to support the pump 24. The portion of the assembly body that extends into the gap can be considered to form the pump support 58. In some examples, the pump support 58 can be considered to form a flange that extends into the gap to support the pump 24.

[0047] Pump mount 64 is configured to interface with pump support 58 to mount pump 24 to assembly body 20. For example, pump mount 64 can be formed by a pair of supports that define a gap therebetween with the gap configured to receive a portion of the pump support 58 to mount pump 24 on assembly body 20.

[0048] Pump 24 is mounted to assembly body 20 and to drive 28. The piston 36 of pump 24 is connected to drive 28 to be reciprocated by the drive 28. Pump body 34 of pump 24 is connected to assembly body 20 to be supported by assembly body 20. Pump 24 can be considered to be mounted at a static interface and a dynamic interface, the static interface between pump body 34 and assembly body 20 and the dynamic interface between piston 36 and drive 28. In the example shown, the static interface is formed between pump mount 64 and pump support 58.

[0049] Guard 52 is mounted to assembly body 20. Guard 52 is movable to cover and uncover a mounting cavity 66 within assembly body 20. For example, the guard 52 can be pivotable between an open state and a closed state. The pump 24 is at least partially disposed within the mounting cavity 66 with pump 24 mounted to assembly body 20. The guard 52 can cover an opening into mounting cavity 66 when in the closed state.

[0050] Control assembly 56 is supported by assembly body 20. Control assembly 56 is disposed outside of housing 60. Control assembly 56 is fluidly connected to pump 24 to receive the fluid output by pump 24. Control assembly 54 can house a filter among other options. The filter can filter out contaminants from the fluid prior to being pumped to the downstream location. An output hose (not shown) extends between an outlet of pump 24 and an inlet of control assembly 56. Control assembly 56 is configured to control output of the fluid from pumping assembly 12. For example, control assembly 56 can be placed in a priming state in which fluid provided to control assembly 56 is output back to reservoir 14 during priming of pump 24. Control assembly 56 can be placed in an output state in which the fluid is output through outlet fitting 68 to the supply line (e.g., supply line 16 shown in FIG. 1) to be provided to the downstream location, such as for spraying.

[0051] Suction tube 54 is fluidly connected to pump 24. An end of suction tube 54 opposite the end connected to pump 24 is configured to extend into the reservoir 14 such that the fluid is drawn into the suction tube 54 from reservoir 14 and provided to pump 24.

[0052] Stand 22 supports other components of pumping assembly 12 on the support surface. Supports 32 extend vertically downward below the bottom end of pump 24 and interface with the support surface. In the example shown, the supports 32 further extend longitudinally towards the front end of assembly body 20. The supports 32 are formed as a plurality of legs. In the example shown, stand 22 includes a pair of legs, though it is understood that other numbers of legs are possible. In the example shown, stand 22 further includes wheels 62 that can be used for maneuvering and repositioning of pumping assembly 12 such as within a job site or between job sites.

[0053] A power supply (not shown) is configured to provide electrical power to electrically powered components of pumping assembly 12, such as motor 26 and controller 30. The power supply can be formed as a power cord that is configured to plug into a wall socket or by one or more batteries. For example, the one or more batteries can be removable and rechargeable.

[0054] FIG. 3A is an enlarged isometric view of a front end of pumping assembly 12 showing pump 24 mounted to pumping assembly 12. FIG. 3B is an enlarged isometric view of the front end of pumping assembly 12 similar to FIG. 3A but showing pump 24 dismounted from assembly body 20. FIG. 3C is an enlarged isometric view of the front end of pumping assembly 12 from a bottom side of assembly body 20 with pump 24 removed for clarity. FIGS. 3A-3C are discussed together.

[0055] Assembly body 20, pump 24, and a portion of drive 28 are shown. Pump support 58, housing 60, and mounting cavity 66 of assembly body 20 are shown. Assembly body 20 can also be referred to as a drive housing. Pump body 34, piston 36, and pump mount 64 of pump 24 are shown. Upper threading 70 of pump body 34 is shown. Neck 72 and head 74 of piston 36 are shown. Lower ring 76 and upper support 78 of pump mount 64 are shown. Upper support 78 includes mount plate 80 and mount retainer 82. Driving link 84 of drive 28 is shown. Driving link 84 can also be referred to as a slotted connector. Drive link body 86, receiving slot 88, and drive projection 90 of driving link 84 are shown.

[0056] Pump 24 is configured to mount to assembly body 20 by shifting radially relative to pump axis PA to form both static and dynamic connections. The pump 24 is configured to shift in mount direction MD1 during mounting and is configured to shift in mount direction MD2 during dismounting. The static interface is formed between pump mount 64 and pump support 58. The dynamic interface is formed between piston 36 and drive 28. In the example shown, the dynamic interface is formed between piston 36 and driving link 84.

[0057] Assembly body 20 is configured to support other components of pumping assembly 12. Mounting cavity 66 is formed in assembly body 20. Cavity opening 92a and cavity opening 92b are open to mounting cavity 66. Cavity opening 92a can also be referred to as a front opening or longitudinal opening. Cavity opening 92b can also be referred to as a lower opening or a vertical opening.

[0058] As best seen in FIG. 3C, a locator 95 can extend at least partially around cavity opening 92b. The locator 95 includes a sloped outer wall that extends inwards towards the reciprocation axis RA as the locator 95 extends away from the bottom side of the frame 94. The locator 95 is disposed on an opposite side of body projection 96 from mounting cavity 66. Guard 52 can include a projection similar to locator 95. The projection of guard 52 and the locator 95 are configured to be received in the recess 77 of the lower ring 76, which recess 77 can be referred to as a conical recess. The recess 77 receiving the locator 95 aligns pump axis PA with the reciprocation axis RA for coaxial driving, preventing off- center loading of piston 36. The recess 77 receiving the locator 95 further locks the static interface between pump 24 and frame 94 to prevent radial shifting of pump 24 relative to pump axis PA during operation. The projection of the guard 52 being received in the recess 77 locks the guard 52 in the closed state until the lower ring 76 is loosened to allow dismounting of the pump 24.

[0059] Pump support 58 is disposed at least partially around cavity opening 92b. Pump support 58 can be formed by frame 94 of assembly body 20, such as a portion of frame 94 that projects out of housing 60. Frame 94 can support motor 26 and drive28. Pump support 58 is configured to interface with pump mount 64 to form the static interface between assembly body 20 and pump 24. In the example shown, pump support 58 is open at the front end of assembly body 20, such as at cavity opening 92a.

[0060] Body projection 96 extends at least partially around cavity opening 92b. Body projection 96 can be formed by a single projection or by multiple discrete projections. Body projection 96 can also be referred to as a lower projection. Body projection 96 can be considered to form one or more flanges. In some examples, body projection 96 is configured as a U-shaped flange. Upper projection 98 is spaced axially from body projection 96 along axis RA, which is a reciprocation axis of driving link 84. Axis RA and pump axis PA can be disposed coaxially with pump 24 mounted to assembly body 20. Support slot 100 is formed directly axially between body projection 96 and upper projection 98.

[0061] While pump support 58 is shown as open at cavity opening 92a and extending around a rear side of mounting cavity 66, it is understood that not all examples are so limited. For example, body projection 96 can include a pair of laterally opposed flange ridges on the lateral sides of mounting cavity 66 without extending about the rear side of mounting cavity 66. Upper projection 98 can be similarly configured to body projection 96. In such an example, pump support 58 can include a pair of opposed support slots 100. It is understood that not all examples include upper projection 98 or support slots 100. In some examples, mount plate 80 interfaces with body projection 96 without being received in a support slot 100.

[0062] Driving link 84 forms a portion of drive 28 configured to output reciprocating linear motion to piston 36. Driving link 84 is operably connected to motor 26 to be reciprocated by motor 26. For example, a connecting arm can connect to driving link 84 and the connecting arm can be connected to an eccentric that is rotatably driven by motor 26. Receiving slot 88 is formed in drive link body 86. Receiving slot 88 includes slot opening 102a and slot opening 102b. Slot opening 102a can also be referred to as a front opening, forward facing opening, or longitudinal opening. Slot opening 102b can also be referred to as a lower opening or a vertical opening. In some examples, receiving slot 88 can extend fully through drive link body 86 such that receiving slot 88 is open through slot opening 102a on one side of drive link body 86 and receiving slot 88 is open through a similar slot opening on an opposite side of drive link body 86, such as 180-degrees about drive link body 86 from slot opening 102a. Slot opening 102b is, in the example shown, open through the side of driving link 84 through which slot opening 102a extends and open through a bottom of drive link body 86.

[0063] Drive projection 90 is disposed at least partially about the slot opening 102b. Drive projection 90 is configured to interface with head 74 such that driving link 84 can exert a driving force on a lower side of head 74 to displace piston 36 in axial direction ADI. Drive projection 90 can be considered to form one or more flanges that extend at least partially about slot opening 102b. Drive projection 90 can be formed by a single projection or by multiple discrete projections. In the example shown, drive projection 90 can be considered to form a U-shaped flange, though as noted above, the drive projection 90 may not wrap around a back side of the slot opening 102b. In some examples, drive projection 90 can be formed by opposed flange ridges. Neck 72 extends down within driving link 84 and through slot opening 102b. Neck 72 is disposed in the gap between opposed ridges of drive projection 90.

[0064] Pump 24 is configured to intake fluid and output the fluid under pressure to a downstream location. Piston 36 is at least partially disposed within pump body 34. In the example shown, a portion of piston 36 is disposed outside of pump body 34 such that that portion of piston 36 does not radially overlap with pump body 34, though it is understood that not all examples are so limited. Piston 36 is configured to reciprocate along pump axis PA. In the example shown, pump 24 is a double displacement pump such that pump 24 is configured to output the fluid during both an upstroke of piston 36 (e.g., in axial direction ADI) and a downstroke of piston 36 (e.g., in axial direction AD2).

[0065] Neck 72 and head 74 are disposed at a first end of piston 36. Head 74 is wider than neck 72. For example, a diameter of neck 72 can be less than a diameter of head 74 and the diameter of neck 72 can be less than a diameter of a portion of piston 36 from which neck 72 extends. Neck 72 and head 74 are configured to extend into receiving slot 88 in driving link 84 to form the dynamic interface, such as is disclosed in U.S. Pat. No. 10,077,771, assigned to Graco Minnesota Inc., the disclosure of which is hereby incorporated by reference in its entirety. In the example shown, neck 72 and head 74 are monolithically formed with a piston rod of piston 36 that extends at least partially within pump body 34, though it is understood that not all examples are so limited. For example, neck 72 and head 74 can be formed as a portion of a piston cap that can be formed separately from and connected to other portions of piston 36, such as a piston rod from which neck 72 extends, such as by a shank extending from one of the piston cap and the piston rod extending into a socket formed on the other one of the piston cap and the piston rod. Such a shank and socket connection can be formed by a threaded interface therebetween.

[0066] Pump mount 64 is disposed on pump body 34. Pump mount 64 can be formed separately from pump body 34 and mounted to pump body 34. In the example shown, pump mount 64 is at least partially mounted on upper threading 70 of pump body 34. Pump mount 64 is configured to interface with assembly body 20 to form the static interface. In the example shown, the pump mount 64 is configured to interface with pump support 58 to form the static interface.

[0067] Lower ring 76 is mounted on pump body 34. Lower ring 76 can also be referred to as a threaded ring or tightening ring. Lower ring 76 is disposed outside of mounting cavity 66 with pump 24 mounted to assembly body 20. Lower ring 76 is configured to shift axially along pump body 34 along pump axis PA to change a size of the gap 104 between lower ring 76 and upper support 78. For example, lower ring 76 can be rotated relative to pump body 34 to shift the lower ring 76 axially along the upper threading 70 on pump body 34. During mounting, lower ring 76 can be shifted into engagement with assembly body 20 to secure the static connection between pump 24 and assembly body 20.

[0068] Upper support 78 is mounted on pump body 34. Upper support 78 includes mount plate 80 and mount retainer 82 that are disposed about pump body 34. In the example shown, upper support 78 is formed by multiple components, though it is understood that not all examples are so limited. In the example shown, mount plate 80 is configured to directly interface with assembly body 20 to support pump 24 on assembly body 20. Mount plate 80 is configured to take pump loads and transfer the pump loads to assembly body 20. In the example shown, mount plate 80 is configured to be at least partially disposed within support slot 100 with pump 24 mounted to assembly body 20. Outer edge 106 of mount plate 80 can be disposed within the support slot 100 such that the edge 106 is disposed directly between the upper projection 98 and the body projection 96. The upper projection 98 can interface with mount plate 80 to prevent pump body 34 from shifting in axial direction ADI relative to assembly body 20. The body projection 96 can interface with mount plate 80 to prevent the pump body 34 from shifting in axial direction AD2 relative to assembly body 20.

[0069] In some examples, mount plate 80 can be directly connected to pump body 34, such as by interfaced threading between interior threading in a bore through mount plate 80 and exterior threading on pump body 34. In some examples, mount plate 80 can be retained on pump body 34. For example, mount plate 80 can be disposed on pump body 34 and retained on pump body 34 by mount retainer 82. Mount retainer 82 can be considered to clamp mount plate 80 on pump body 34 in such an example. Mount retainer 82 can be connected to pump body 34 in any desired manner. For example, mount retainer 82 can be threadedly connected to pump body 34, such as by interfacing with upper threading 70. Mount plate 80 extends radially outward from mount retainer 82. In the example shown, mount plate 80 extends radially outward from mount retainer 82 fully annularly about mount retainer 82. As such, the radially outer edge 106 of mount plate 80 is disposed further from pump axis PA than any of the radially outer edges of mount retainer 82. In the example shown, mount retainer 82 is formed as a ring, though it is understood that not all examples are so limited. Guard 52 is supported by assembly body 20. Guard 52 is movable, such as by pivoting, to cover and uncover cavity opening 92a. Guard 52 can be placed in an open state to allow for mounting and dismounting of pump 24. Guard 52 can be placed in a closed state during operation to provide a pinch protection.

[0070] During mounting, the pump 24 is aligned with cavity opening 92a. The pump 24 is shifted radially relative to pump axis PA such that an upper portion of pump 24 passes through cavity opening 92a and into mounting cavity 66. Mount plate 80 is disposed on an opposite side of body projection 96 from lower ring 76. Mount plate 80 extends into mounting cavity 66. Mount plate 80 extends into support slot 100 in the example shown. Mount plate 80 rests on and interfaces with a side of body projection 96 oriented into mounting cavity 66. Head 74 passes through slot opening 102a and into receiving slot 88. With head 74 disposed within receiving slot 88, neck 72 extends downward within driving link 84 and within the gap formed between opposed ridges of drive projection 90. As such, head 74 is retained on driving link 84 while other portions of piston 36 pass through and out of driving link 84.

[0071] With pump mount 64 interfacing with pump support 58 to form the static interface and piston 36 interfacing with driving link 84 to form the dynamic interface the pump body 34 extends through the cavity opening 92b such that a portion of the pump body 34 is within the mounting cavity 66 and a portion of the pump body 34 is disposed outside of the mounting cavity 66. The pump 24 is supported by the pump mount 64 such that the pump body 34 can be considered to hang down through the cavity opening 92b. Lower ring 76 can be actuated to reduce a size of the gap 104 such that a portion of assembly body 20 is clamped between lower ring 76 and upper support 78. In the example shown, the body projection 96 can be clamped between the lower ring 76 and the mount plate 80. Guard 52 can be shifted to the closed state prior to closing the gap 104 and lower ring 76 can, in some examples, engage with guard 52 to maintain guard 52 in the closed state. The lower ring 76 engaging with assembly body 20 prevents dismounting of the pump 24 until lower ring 76 is loosened to enlarge the gap 104 and allow removal of pump 24. The lower ring 76 interfacing with locator 95 aligns pump axis PA with reciprocation axis RA.

[0072] During dismounting, the lower ring 76 is rotated to increase a size of the gap 104 and disengage lower ring 76 from assembly body 20. With lower ring 76 disengaged from assembly body 20, the pump 24 can be pulled in mounting direction MD2 to break both the dynamic interface and the static interface. Pump 24 can be considered to be shifted radially relative to pump axis PA to break the dynamic and static interfaces. Shifting pump 24 in direction MD2 causes head 74 to shift out of receiving slot 88 through slot opening 102a. Shifting pump 24 in direction MD2 causes mount plate 80 to slide out from mounting cavity 66 through cavity opening 92a. In the example shown, shifting pump 24 in direction MD2 causes mount plate 80 to slide out from support slot 100. Pump 24 is thus dismounted from assembly body 20.

[0073] Pump mount 64 provides significant advantages. Pump 24 can be mounted to form the dynamic and static interfaces by simply shifting the pump 24 radially relative to pump axis PA. The dynamic and static interfaces can be formed simultaneously and can be broken simultaneously. Head 74 can mount to and dismount from driving link 84 by a sliding interface, as opposed to a pin connection that requires significant time to align and form. Such a configuration reduces time required for mounting and maintenance, reducing downtime and improving efficiency of pumping operations.

[0074] Mount plate 80 interfaces with assembly body 20 to support pump 24 on assembly body 20. Mount plate 80 provides increased surface area for interfacing with assembly body 20. The increased surface area spreads out forces experienced by pump mount 64 during pumping operations, providing a robust and sturdy interface. Mount plate 80 can interface with a full extent of the top surface 108 of body projection 96 to provide the increased contact area for spreading out the forces experienced during pumping. Further, in the examples shown the mount plate 80 can take both pumping forces experienced during a downstroke in which piston 36 displaces in direction AD2 and pumping forces experienced during an upstroke in which piston 36 displaces in direction ADI by mount plate 80 interfacing with body projection 96 and upper projection 98.

[0075] FIG. 4A is an isometric view of pump 24. FIG. 4B is an isometric view of pump 24 showing upper support 78 exploded away from pump body 34. FIG. 4C is a top plan view of pump 24. FIG. 4D is a side elevational view of pump 24. FIGS. 4A-4D are discussed together. Pump body 34, piston 36, and pump mount 64 of pump 24 are shown. Pump body 34 includes intake housing 110 and outlet housing 112. Pump body 34 further includes upper threading 70 and plate shoulder 114. Upper threading 70 includes threaded portion 116a and threaded portion 116b. Pump mount 64 includes lower ring 76 and upper support 78. Upper support 78 includes mount plate 80 and mount retainer 82.

[0076] Pump mount 64 is disposed on pump body 34 and is configured to form a static connection with assembly body 20 to mount pump 24 to assembly body 20. In the example shown, pump mount 64 is disposed on outlet housing 112. Pump 24 is configured to take fluid in through intake housing 110 and is configured to output the fluid under pressure from outlet housing 112.

[0077] Lower ring 76 and upper support 78 are mounted on pump body 34. In the example shown, upper support 78 is fixed to pump body 34 such that upper support 78 remains static relative to pump body 34 during mounting and dismounting of pump 24. Lower ring 76 is connected to pump body 34 such that lower ring 76 is movable along pump body 34 for securing pump 24 to and releasing pump 24 from the assembly body 20. For example, lower ring 76 can be threadedly connected to pump body 34 at upper threading 70 and lower ring 76 can be rotated to displace axially along pump body 34.

[0078] In the example shown, both lower ring 76 and upper support 78 are connected to pump body 34 by interfaced threading. In the example shown, lower ring 76 is threadedly connected to pump body 34 by interfacing with threaded portion 116a. In the example shown, upper support 78 is threadedly mounted to pump body 34 by interfacing with threaded portion 116b. Specifically, mount retainer 82 is threadedly connected to pump body 34 by interfacing with threaded portion 116b.

[0079] In the example shown, the threaded portion 116a has a larger diameter than threaded portion 116b. Shoulder 114 is formed on an exterior of pump body 34. Shoulder 114 is configured to interface with and support mount plate 80 on pump body 34. Shoulder 114 is disposed axially between threaded portions 116a, 116b. In the example shown, a portion of the exterior of pump body 34 axially between threaded portion 116a and threaded portion 116b does not include exterior threading. As such, a non-threaded portion 117 of the exterior of pump body 34 is disposed axially between threaded portion 116a and threaded portion 116b.

[0080] The mount plate 80 radially overlaps with the non-threaded portion 117 between the threaded portion 116a and the threaded portion 116b in the example shown. Mount plate 80 is configured to rest on shoulder 114 with mount plate 80 disposed on pump body 34. Shoulder 114 defines an axial location of mount plate 80 on pump body 34. The pump body 34 extends through plate bore 118 of mount plate 80. The plate bore 118 extends fully through the mount plate 80 between a top side 120 of mount plate 80 and a bottom side 122 of mount plate 80.

[0081] The shoulder 114 provides a positive locating feature for locating of the mount plate 80 along the pump body 34. The shoulder 114 provides a precise axial location for the mount plate 80 along the pump body 34. Such positive locating of the mount plate 80 provides for tighter axial tolerances within pump 24 during pumping. In other mounting configurations, if the pump body 34 is mounted too low relative to drive 28 then a large volume of fluid may remain in a lower pumping chamber in the pump body even when the piston 36 is at the bottom of a downstroke. Mounting the pump body 34 too high relative to drive 28 can cause internal impacts, damaging the pump 24. Positively locating the mount plate 80 along the pump body 24 provides for more efficient pumping as a greater volume of the lower chamber can be evacuated with each downstroke and a thus a greater volume of fluid can be drawn into the lower chamber with each upstroke. In addition, positively locating the mount plate 80 along pump body 34 prevents undesirable internal collisions because mount plate 80 cannot be located too low along pump body 34.

[0082] Mount plate 80 includes outer edge 106. Outer edge 106 extends fully about the perimeter of mount plate 80. In the example shown, the outer edge 106 includes rear portion 124, side portions 126, and front portion 128. The rear portion 124 is curved and extends between the side portions 126. In the example shown, the rear portion 124 is arcuate. In the example shown, the rear portion 124 is semi-circular. The side portions 126 can each extend straight, among other options. The side portions 126 can be disposed parallel to each other. The side portions 126 extend between the rear portion 124 and the front portion 128. In the example shown, the front portion 128 extends straight between the two side portions 126, though it is understood that other configurations are possible. In some examples, the front portion 128 can be of other configurations, such as curved, rounded, etc. The front portion 128 can be disposed orthogonal to one or both of the side portions 126. In the example shown, mount plate 80 can be considered to be D-shaped, though it is understood that not all examples are so limited. In the example shown, the outer edge 106 is asymmetrically spaced from the pump axis PA.

[0083] Mount plate 80 is configured to spread loads experienced during pumping. Spreading the loads prevents damage to the pump mount 64 and frame 94 as the loads are transferred through pump mount 64 to the frame 94. In the example shown, the mount plate 80 is configured such that rear portion 124 and side portions 126 are in contact with body projection 96 to transfer loads to frame 94 at body projection 96. In some examples, a full length of the rear portion 124 and the full lengths of the side portions 126 are in contact with the body projection 126.

[0084] In the example shown, mount plate 80 can be considered to be asymmetrical about the pump axis PA in that load bearing portion of mount plate 80 are disposed at different radial distances from pump axis PA. In the example shown, a forwardmost contact point CPI, which is a location along the side portions 126 axially overlapping with body projection 96, is spaced a first radial distance R1 from pump axis PA. A rearwardmost contact point CP2, which is a location along rear portion 124 axially overlapping with body projection 96, is spaced a second radial distance R2 from pump axis PA. The radial distance R1 is greater than the radial distance R2. In the example shown, portions of outer edge 106 forward of side points SP (e.g., between side points SP and front portion 128) are disposed further radially from pump axis PA than portion of outer edge 106 extending along rear portion 124. In some examples, rear portion 124 can be considered to extend between the two side points SP. In the example shown, portions of outer edge 106 rearward of side points SP are disposed a common radial distance from pump axis PA. The radial distance between pump axis PA and side portions 126 can increase along the lengths of the side portions 126 towards the front portion 128.

[0085] In the example shown, mount plate 80 includes fillet 130 between edge 106 and bottom side 122. Fillet 130 is formed as a convex fillet. Fillet 130 can also be referred to as a curved surface. As such, the connection between bottom side 122 and edge 106 is curved. In the example shown, the fillet 130 is formed on side portions 126, rear portion 124, and partially across front portion 128. Front portion 128 further includes flat 132 that is disposed between side portions 126. Flat 132 can provide a location for guard 52 to interface with mount plate 80 to secure mount plate 80 within mount cavity 66, preventing rattling of guard 52 during operation such as due to vibrations. As discussed above, a portion of guard 52 can be received in lower ring 76. The guard 52 interfacing with flat 132 can inform the user that pump 24 is fully mounted within mounting cavity 66 because if pump 24 is not far enough into mounting cavity 66 the flat 132 will prevent the guard 52 from fully closing.

[0086] Fillet 130 provides for increased contact area between mount plate 80 and assembly body 20. As shown in FIG. 3B, a curved surface 134, which can also be referred to as a concave fillet, is formed between body projection 96 and a side wall 136 of mounting cavity 66. In the example shown, the side wall 136 is a side wall of support slot 100. Fillet 130 and the curved surface 134 are configured to interface to increase the contacting surface area between mount plate 80 and assembly body 20. Such a rounded interface provides for easier insertion and removal of mount plate 80 into and out of mounting cavity 66 while further spreading the pump loads, decreasing wear and improving structural stability. While mount plate 80 is shown as including fillet 130, it is understood that not all examples are so limited. In some examples, the transitions between edge 106 and bottom side 122 can be formed as bevels, chamfers, etc. The pump support 58 can include a surface shaped to mate with the shape of the transition between side portions 126 and bottom side 122.

[0087] In the example shown, mount plate 80 is secured on pump body 34 by mount retainer 82. Mount retainer 82 is connected to pump body 34 by interfaced threading. In the example shown, interior threading of mount retainer 82 interfaces with threaded portion 116b on pump body 34. Mount retainer 82 is configured to interface with top side 120 of mount plate 80. Mount retainer 82 can clamp mount plate 80 on pump body 34. In the example shown, mount plate 80 is captured between mount retainer 82 and shoulder 114. In some examples, mount retainer 82 can be secured in position on pump body 34, such as by a set screw extending through mount retainer 82 and interfacing with pump body 34, by thread lock adhesive, among other options.

[0088] As best seen in FIG. 4C, outer edge 106 of mount plate 80 extends radially outward of mount retainer 82 fully annularly about the pump axis PA. The mount plate 80 extends radially outward from mount retainer 82 such that each of rear portion 124 and the side portions 126 can extend into the support slot 100 formed between body projection 96 and upper projection 98. The outer radial side of the mount retainer 82 being recessed from outer edge 106 facilitates mount plate 80 sliding into and out of support slot 100 without mount retainer 82 catching on structure of assembly body 20.

[0089] Pump mount 64 provides significant advantages. Mount plate 80 includes rear portion 124 and side portions 126 that are configured to interface with assembly body 20 to form the static connection between pump 24 and assembly body 20. The side portions 126 provide increased surface area for interfacing with pump support 58 as compared to a mount plate 80 having a circular outer edge 106. A circular mount plate with the same contact area as mount plate 80 would require a large diameter. As such, mount plate 80 provides a more compact configuration for mounting pump 24 while providing robust structural support to pump 24 at the static interface.

[0090] Mount plate 80 includes fillet 130 that interfaces with the curved surface 134 of assembly body 20. The curved interface provides for increased contact area between mount plate 80 and assembly body 20, distributing the loads experienced during pumping across a larger area of mount plate 80. Distributing the loads across mount plate 80 provides for a more robust connection, allowing pump 24 to pump at higher pressures or speeds while maintaining the static connection.

[0091] Mount plate 80 is positively located along pump body 34 by shoulder 114. Positively locating mount plate 80 provides for tighter axial tolerances during pumping, providing for more efficient pumping by reducing dead volume within pump 24. Such a configuration allows for a greater volume of fluid to be pumped with each stroke of piston 36.

[0092] FIG. 5A is an isometric view of mount plate 80. FIG. 5B is an elevational view of a portion of a pump body 34 of a pump 24. In the example shown, the mount plate 80 is configured to interface with the pump body 34 at a keyed interface. The keyed interface is formed by a projection- slot interface in which the projection extends into the slot. The keyed interface between mount plate 80 and pump body 34 maintains mount plate 80 in a desired orientation relative to pump body 34 during installation of mount plate 80 on pump body 34. For example, the keyed interface can prevent rotation of the mount plate 80 relative to pump body 34 during installation of the mount retainer 82.

[0093] In the example shown, mount retainer 82 includes projection 144 that extends from a bottom side 122 of the mount plate 80. The projection 144 is formed as a projection that is configured to be received by the slot 146 formed on pump body 34. In the example shown, the projection 144 is formed as a rail that is laterally elongate between the side portions 126 of the mount plate 80. It is understood that, while projection 144 is formed as an elongate projection in this example, not all examples are so limited. For example, projection 144 can be formed as a single discrete projection, a series of projections, by a plurality of projections arrayed around the plate bore 118 of mount plate 80, etc.

[0094] During assembly, mount plate 80 is placed on pump body 34 and the projection 144 is disposed within slot 146. The projection 144 extending into slot 146 prevents rotation of the mount plate 80 relative to the pump body 34. The mount retainer 82 can be threaded onto pump body 34 and such installation does not cause rotation of the mount plate 80. Such a configuration ensures that the pump 24 will be disposed in a desired orientation when the pump 24 is mounted to the assembly body 20. As discussed above, the mount plate 80 is configured such that the pump 24 can mount in a single orientation relative to the assembly body 20. Keying the mount plate 80 to the pump body 34 ensures that the pump body 34 (and thus various fluid connections of the pump 24) are oriented properly to form fluid connections. Such a configuration provides for quick and easy assembly and mounting of pump 24.

[0095] FIG. 6 is an enlarged isometric view of a top portion of a pump 24 showing a pump mount 264 of the pump 24. Pump mount 264 is substantially similar to pump mount 64 (best seen in FIGS. 3B and 4A-4D) except that pump mount 264 includes ring lock 338. Components of pump mount 264 similar to components of pump mount 264 are indicated with the same reference number except increased by “200” (e.g., pump mount 64 and pump mount 264).

[0096] Pump 24 mounts to an assembly body 20 by a static interface formed between pump mount 264 and pump support 58 of assembly body 20. The entirety of the pump 24 can be supported by the assembly body 20. The pump 24 can hang from the assembly body 20. The pump 24 may not be directly structurally supported by any other structure of the pumping system 10 other than the assembly body 20. The pump 24 is secured to the assembly body 20 by reception of part of the pump 24 within a slot of the assembly body 20. In particular, the pump mount 264 includes upper support 278. The mount plate 280 of upper support 278 can be D-shaped, however various other options are possible. Mount plate 280 fits in a slot the assembly body 20, and when received, the mount plate 280 is too wide to move vertically out of the assembly body 20, such that the interfacing of the mount plate 280 with the assembly body 20 braces the pump 24 to prevent vertical motion of the pump body 34 of the pump 24 during reciprocation of the piston 36. The mount plate 280 is fixed with respect to the pump body 34 of the pump 24.

[0097] The pump 24 includes lower ring 276. The lower ring 276 can rotate on a threaded surface of the cylinder of the pump 24. The lower ring 276 can be spun around the pump body 34 of the pump 24 to move the lower ring 276 vertically relative to the pump body 34 of the pump 24. In the example shown, downward vertical motion of the lower ring 276 loosens the pump 24 to allow the upper support 278 to slide out from the slot of the assembly body 20, whereas upward vertical motion of the lower ring 276 causes the lower ring 276 to engage the bottom of the assembly body 20 to clamp a portion of the assembly body 20 between the mount plate 280 and the lower ring 276 to secure the pump 24 to the assembly body 20 and thereby secure the static interface.

[0098] During heavy vibration, such as that experienced during pumping due to reciprocation of the piston 36, the lower ring 276 could loosen relative to the assembly body 20 which could risk the pump 24 sliding out from the slot of the assembly body 20. Such rotation due to vibration could release the static interface allowing for movement of pump 24 laterally relative to assembly body 20. Ring lock 338 is configured to interface with lower ring 276 to prevent undesired rotation and loosening of lower ring 276. It is understood that, in some examples, lower ring 276 can rotate to some degree relative to ring lock 338, but ring lock 338 prevents lower ring 276 from rotating sufficient to release the static interface. In the examples shown, the lower ring 276 includes a plurality of radial projections 340 forming a star shape. Spaces are formed between the projections 340 and circumferentially about a body of the lower ring 276 from which the projections 340 extend. Ring lock 338 is supported by mount plate 280 in the example shown. Ring lock 338 projects from mount plate 280 and can extend downward from mount plate 280. Ring lock 338 extends into the space between the projections 340 of the lower ring 276. In the example shown, ring lock 338 is formed as a pin that extends from mount plate 280 and through a space between projections 340.

[0099] In the example shown, an aperture is formed through mount plate 280. Ring lock 338 extends through the aperture in mount plate 280 and downward to interface with lower ring 276. In the example shown, mount plate 280 includes lock tab 342 that projects from a main body portion of mount plate 280. The lock tab 342 projects forward from front portion 328 of mount plate 280 in the example shown. The lock tab 342 is disposed laterally outward from the pump axis PA. The aperture is formed through the lock tab 342. It is understood, however, that not all examples are so limited. For example, the aperture can be formed through the main body portion of mount plate 280, such as proximate a comer between a side portion 126 and front portion 128, among other options.

[0100] A top part of the pin forming ring lock 338 can be too large to fit through the aperture through the mount plate 280, which keeps the ring lock 338 hanging and extending downward toward the lower ring 276 so that the ring lock 338 extends between the projections 340 of the lower ring 276. In the example shown, a ring is connected to the pin of ring lock 338 to prevent the pin from passing fully through the aperture in mount plate 280. The ring also provides a location for a user to easily grasp ring lock 338 to remove ring lock 338 from the space between projections 340 to allow for loosening of lower ring 276.

[0101] The ring lock 338 being between the radial projections of the lower ring 276 blocks the lower ring 276 from rotating more than a few degrees (due to blocking contact between the ring lock 338 and a radial projection 340 of the lower ring 276), and thus prevent the lower ring 276 from rotating sufficient to unclamp from the assembly body 20. Therefore, the ring lock 338 can help secure the lower ring 276 from loosening and risking loosening of the pump 24. The ring lock 338 can be removed by holding a portion of the ring lock 338, above the mount plate 280, and pulling the ring lock 338 vertically upwards through the aperture through the mount plate 280 until the bottom of the ring lock 338 clears away from the space between the radial projections 340 of the lower ring 276 such that the lower ring 276 can make full rotations to move vertically downward and disengage from the assembly body 20.

[0102] While the invention(s) has been described with reference to an exemplary embodiment(s), it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention(s) without departing from the essential scope thereof. Therefore, it is intended that the invention(s) not be limited to the particular embodiment(s) disclosed, but that the invention(s) may include all embodiments falling within the scope of the appended claims. Any single feature, or any combination of features from one embodiment show herein, may be utilized in a different embodiment independent from the other features shown in the embodiment herein. Accordingly, the scope of the invention(s) and any claims thereto are not limited to the particular to the embodiments and / or combinations of the features shown herein, but rather can include any combination of one, two, or more features shown herein.

Claims

CLAIMS:

1. A displacement pump comprising: a pump body; a piston at least partially disposed in the pump body, the piston configured to reciprocate on a pump axis to pump fluid through the pump body; and a pump mount disposed on the pump body and configured to form a static connection to support the pump body, the pump mount comprising: a lower ring movable along the pump body; and an upper support disposed on the pump body, the upper support including a mount plate.

2. The displacement pump of claim 1, wherein the upper support further comprises a mount retainer connected to the pump body, the mount retainer securing the mount plate on the pump body.

3. The displacement pump of claim 2, wherein the mount plate is clamped on the pump body by the mount retainer.

4. The displacement pump of any one of claims 2 and 3, wherein the mount retainer is threadedly connected to the pump body.

5. The displacement pump of any one of claims 2^1, wherein the mount retainer is formed as a ring mounted to the pump body.

6. The displacement pump of any one of claims 2-5, wherein the mount plate is disposed axially between the lower ring and the mount retainer.

7. The displacement pump of any one of claims 1-6, wherein the lower ring is threadedly connected to the pump body.

8. The displacement pump of any preceding claim, wherein an outer edge of the mount plate includes a rear portion, a front portion, a first side portion extending between the rear portion and the front portion, and a second side portion extending between the rear portion and the front portion.

9. The displacement pump of claim 8, wherein the rear portion is curved.

10. The displacement pump of any one of claims 8 and 9, wherein the first side portion extends straight between the rear portion and the front portion.

11. The displacement pump of claim 10, wherein the second side portion extends straight between the rear portion and the front portion.

12. The displacement pump of any one of claims 8-11, wherein the front portion extends straight between the first side portion and the second side portion.

13. The displacement pump of any one of claims 8-12, wherein a fillet is formed between the outer edge and a bottom side of the mount plate, the bottom side oriented towards the lower ring.

14. The displacement pump of claim 13, wherein the fillet is formed on the rear portion, the first side portion, and the second side portion.

15. The displacement pump of claim 14, wherein the fillet is further formed on the front portion.

16. The displacement pump of any one of claims 13-15, wherein the fillet is formed across a full extent of the rear portion, a full extent of the first side portion, and a full extent of the second side portion.

17. The displacement pump of any one of claims 13-16, wherein the fillet is formed across a partial extent of the front portion.

18. The displacement pump of any preceding claim, wherein the mount plate does not radially overlap with exterior threading on the pump body.

19. The displacement pump of any preceding claim, wherein the mount plate is supported by a shoulder of the pump body.

20. The displacement pump of any one of claims 1-19, wherein the a forwardmost contact point of the mount plate is disposed further from the pump axis than a rearwardmost contact point of the mount plate.

21. The displacement pump of any one of claims 1-19, wherein an outer edge of the mount plate is asymmetrically spaced from the pump axis.

22. The displacement pump of any one of claims 1-19, wherein a radial distance between an outer edge of the mount plate and the pump axis increases along a side portion of the outer edge as the side portion extends towards a front portion of the outer edge.

23. The displacement pump of claim 1, wherein: the pump mount further includes a mount retainer that interfaces with the mount plate to retain the mount plate on the pump body; the mount retainer is threadedly connected to the pump body by interfacing with a first portion of exterior threading of the pump body; and the lower ring is threadedly connected to the pump body by interfacing with a second portion of exterior threading of the pump body.

24. The displacement pump of claim 23, wherein the first portion of exterior threading has a first diameter, the second portion of exterior threading has a second diameter, and the second diameter is greater than the first diameter.

25. The displacement pump of any one of claims 23 and 24, wherein an exterior of the pump body includes a non-threaded portion axially between the first portion of exterior threading and the second portion of exterior threading.

26. The displacement pump of claim 25, wherein the mount plate radially overlaps with the non-threaded portion.

27. The displacement pump of any preceding claim, wherein the piston includes a neck having a neck width and a head disposed at an end of the neck, the head having a head width, and wherein the head width is greater than the neck width.

28. The displacement pump of any one of claims 2-6 and 23-27, wherein the mount plate extends radially outward of the mount retainer.

29. The displacement pump of any one of claims 2-6 and 23-27, wherein the mount plate extends radially outward of the mount retainer fully around the mount retainer.

30. The displacement pump of any preceding claim, wherein the mount plate is D-shaped.

31. The displacement pump of any one of claims 1-30, further comprising: a ring lock that interfaces with the lower ring to prevent rotation of the lower ring fully about the pump body.

32. The displacement pump of claim 31, wherein the lower ring includes a plurality of projections extending outward from a body of the lower ring.

33. The displacement pump of claim 32, wherein the ring lock extends into a space between the plurality of projections to interface with the lower ring.

34. The displacement pump of any one of claims 31-33, wherein the ring lock extends through an aperture in the mount plate and is supported by the mount plate.

35. A pumping assembly comprising: an assembly body; a motor disposed within the assembly body and configured to generate a rotational output; a drive connected to the motor to receive the rotational output from the motor, the drive configured to convert the rotational output to linear reciprocating motion; andthe pump of any preceding claim configured to mount to the assembly body at a static interface between the pump mount and the assembly body and configured to mount to the drive at a dynamic interface between the piston and the drive.

36. The pumping assembly of claim 35, wherein the pump is configured to mount to the assembly body and drive by radial movement of the pump relative to the pump axis.

37. A pumping assembly comprising: an assembly body having a mounting cavity; a motor disposed within the assembly body and configured to generate a rotational output; a drive connected to the motor to receive the rotational output from the motor, the drive configured to convert the rotational output to linear reciprocating motion, the drive including a receiving slot; and a displacement pump comprising: a pump body; a piston at least partially disposed in the pump body, the piston configured to reciprocate on a pump axis to pump fluid through the pump body, the piston including a neck having a neck width and a head having a head width greater than the neck width; and a pump mount disposed on the pump body and configured to interface with the assembly body to support the pump body on the assembly body, the pump mount comprising: a lower ring movable along the pump body; and an upper support disposed on the pump body, the upper support including a mount plate; wherein the displacement pump is configured to mount to the assembly body by a portion of the assembly body being received in a gap between the lower ring and the mount plate and is the displacement pump is configured to mount to the drive by the head of the piston being received in the receiving slot.

38. The pumping assembly of claim 37, wherein the displacement pump is configured to mount to the assembly body by shifting radially through a first housingopening of the mounting cavity and wherein the pump body hangs down through a second housing opening of the mounting cavity such that a portion of the pump body is disposed outside of the mounting cavity with the pump mounted to the assembly body.

39. The pumping assembly of claim 37, wherein the assembly body comprises: a body projection extending partially around a lower opening of the mounting cavity, the body projection forming the portion of the assembly body received in the gap.

40. The pumping assembly of claim 39, wherein the assembly body further comprises: an upper projection spaced from the body projection such that a support slot is formed between the upper projection and the body projection, wherein the mount plate is at least partially disposed in the support slot with the displacement pump mounted to the assembly body.

41. The pumping assembly of any one of claims 39 and 40, wherein: a curved surface extends between the body projection and a side wall of the mounting cavity; the mount plate includes a fillet between an outer edge of the mount plate and a bottom side of the mount plate, the bottom side oriented towards the lower ring; and the fillet interfaces with the curved surface with the displacement pump mounted to the assembly body.

42. A displacement pump comprising: a pump body; a piston at least partially disposed in the pump body, the piston configured to reciprocate on a pump axis to pump fluid through the pump body; and a pump mount disposed on the pump body and configured to form a static connection to support the pump body, the pump mount comprising: a lower ring movable along the pump body; and an upper support disposed on the pump body, the upper support including: a mount plate, wherein a gap is formed between the mount plate and the lower ring; anda mount retainer, the mount retainer connected to the pump body and securing the mount plate on the pump body.

43. The displacement pump of claim 42, wherein the mount plate is clamped on the pump body between the mount retainer and a shoulder of the pump body.

44. The displacement pump of any one of claims 42 and 43, wherein the mount retainer is threadedly connected to the pump body by interfacing with a first threaded portion of the pump body.

45. The displacement pump of claim 44, wherein the lower ring is threadedly connected to the pump body by interfacing with a second threaded portion of the pump body.

46. The displacement pump of claim 45, wherein the mount plate is disposed axially between the first threaded portion and the second threaded portion.

47. The displacement pump of claim 44, wherein an exterior of the pump body includes a non-threaded portion axially between the first threaded portion and the second threaded portion.

48. The displacement pump of any one of claims 42-47, wherein the mount plate is not directly threadedly connected to the pump body.

49. The displacement pump of any one of claims 42-48, wherein the mount plate extends radially outward of the mount retainer fully around the mount retainer.

50. A displacement pump comprising: a pump body; a piston at least partially disposed in the pump body, the piston configured to reciprocate on a pump axis to pump fluid through the pump body; and a pump mount disposed on the pump body and configured to form a static connection to support the pump body, the pump mount comprising: a lower ring movable along the pump body, the lower ring including a plurality of projections extending outward from a body of the lower ring; an upper support disposed on the pump body, the upper support including a mount plate; and a ring lock that is at least partially disposed in a space between the plurality of projections such that the ring lock inhibits rotation of the lower ring relative to the pump body.

51. The displacement pump of claim 50, wherein the ring lock is supported by the mount plate.

52. The displacement pump of claim 51, wherein the ring lock extends through an aperture through the mount plate.

53. The displacement pump of any one of claims 50-53, wherein the ring lock is formed as a pin.

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