PUMP HAVING INTERCHANGEABLE HEADS
A pump comprising a housing having a head carrying area, a motor disposed within the housing, a rotor rotated by the motor; and a pump head assembly mounted to the head mount of the housing, the pump head assembly being one of a piston head assembly or a diaphragm head assembly. The head carrying area is configured such that the piston head assembly and the diaphragm head assembly may be interchangeably mountable thereon. The head carrying area comprises a cylinder seat surrounding an aperture and a radially outward of the aperture. The sidewall may also have a step. The cylinder seat may be sized to receive a cylinder of the piston head assembly and the annular step of the annular sidewall may be configured to receive a diaphragm support ring of the diaphragm head assembly.
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This application claims the benefit of U.S. Provisional Patent Application No. 61/909,894, filed Nov. 27, 2013, the entire disclosure of which is hereby incorporated by reference.
FIELD OF THE INVENTIONThis present invention relates to a pump which provides the interchangeability of a diaphragm pump head and a piston pump head mounted to the pump such that the pump can be selectively configured by an operator as one of a diaphragm pump or a piston pump.
BACKGROUND OF THE INVENTIONHaving flexibility in stocking pumping types may be desirable for pump distributors. For example, different applications may be better carried out by a diaphragm pump or a piston pump. Currently, if a pump distributor wishes to vary the type of pump utilized, i.e., change from a diaphragm pump to a piston pump for a particular application, the distributor must purchase an entirely new pump.
SUMMARY OF THE INVENTIONA pump provides for interchangeability of heads thereby allowing the distributor or operator to vary the type of pump between a diaphragm pump and piston pump by mounting different heads to the same housing, motor and shaft. The present pump includes a housing having a head carrying area; a motor; a shaft rotated by the motor; and a pump head coupled to the head carrying area. The pump head may be selected from a piston pump head, and a diaphragm pump head. The piston pump head and the diaphragm pump head are interchangeably mountable on the head carrying area.
The head carrying area includes a sidewall and a plurality of piston pump head mounting bosses. The bosses may be disposed radially inward of a first side surface of the sidewall. The piston pump head mounting bosses may be integral with the first side surface and extend laterally in a direction radially inward of the first side surface. The carrying area also includes a plurality of diaphragm pump head mounting bosses. These bosses may be disposed radially outward of the sidewall. The diaphragm pump head mounting bosses may extend laterally in a direction outward away from said first side surface. The diaphragm pump head mounting bosses may also extend in a radial and lateral direction away from the center axis of an aperture delimited in the radial direction by said first side surface. The radial and axial direction of the piston head mounting bosses and diaphragm head mounting bosses is relative to a long axis passing through the aperture. Outward is away from said axis and inward is towards said axis. The head carrying area, which can also be called a mounting structure or mount, includes a diaphragm support ring structure adapted to carry a diaphragm support ring. The ring support structure may be adjacent and about said aperture. The ring support may be continuous with said first side surface. The support may be formed in said first sidewall having said first side surface.
The head carrying area also includes a cylinder seat adjacent said aperture of said housing. It is about said aperture. It is about in a radial direction relative to the axis of said aperture. It surrounds the aperture and is annular. A second side surface delimits said aperture in the radial direction. The second side surface is an annular side surface and radially outward of a portion of said aperture.
The cylinder seat is sized and adapted to receive and carry a cylinder. The cylinder is adapted to be in sealing engagement with said piston pump head when said piston pump head is coupled to said carrying area and said cylinder is carried by said seat.
The pump, when configured as a diaphragm pump comprises a diaphragm eccentric, removably coupled to said shaft, a reciprocating diaphragm support operably coupled to said diaphragm eccentric and extending in the axial direction in said aperture, a diaphragm coupled to said reciprocating support. The diaphragm pump head is removably coupled to the carrying area. An outer edge of said diaphragm is clamped between said diaphragm support ring and said diaphragm pump head. The support ring and head provide opposing forces on said outer edge of said diaphragm.
The pump, when configured as a piston pump, comprises a piston eccentric removably coupled to said shaft, a piston operably connected to said piston eccentric and extending in the axial direction in said aperture, said cylinder bearing on and carried by said cylinder seat, a head of said piston is sealingly engaged with said cylinder and in said cylinder. The piston pump head is removably coupled to said carrying area. The cylinder is between said piston pump head and said cylinder seat. The piston pump head and seat exert opposing forces on said cylinder and at opposite ends of said cylinder.
Other aspects and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments and the accompanying drawing figures.
The accompanying drawings form a part of the specification and are to be read in conjunction therewith, in which like reference numerals are employed to indicate like or similar parts in the various views.
The following detailed description of the present invention references the accompanying drawing figures that illustrate specific embodiments in which the invention can be practiced. The embodiments are intended to describe aspects of the present invention in sufficient detail to enable those skilled in the art to practice the invention. Other embodiments can be utilized and changes can be made without departing from the spirit and scope of the present invention. The present invention is defined by the appended claims and, therefore, the description is not to be taken in a limiting sense and shall not limit the scope of equivalents to which such claims are entitled.
As shown in
Floor 20 may be substantially parallel to the longitudinal axis of shaft 16. The floor 20 extends radially inward and is between said first side surface 26 and a second side surface 35.
Second side surface 35 delimits in the radial direction a second portion 33′ of aperture 34. A cylinder seat 36 surrounds and is adjacent and about the second portion of aperture 34. The cylinder seat 36 is also formed in wall portion having said second side surface 35. The second portion 33′ of aperture 34 is radially inward of sidewall 22 and first side surface 26. Second portion of aperture 34 has a second radius extending from the axis of aperture 34 to second side surface 35. First portion 33 of aperture 34 has a first radius extending from the axis of aperture 34 to the first side surface 26. The second radius is shorter than the first radius. The radius can be shorter by at least 35%. Cylinder seat 36 may include a bearing surface 38. The floor 20 extends in the radial direction between first side surface 26 and cylinder seat 36.
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Head carrying area 18 is adapted to allow one of two pump heads to be mounted thereon so that an operator or distributor may interchange a diaphragm pump assembly 200 and a piston pump assembly 100. As further shown in
Assembly 100 further includes a cylinder member 118 having an inner surface 120 and an outer surface 122. Cylinder plug portion 114 is configured to be received into cylinder member 118 such that O-ring 116 forms a seal with inner surface 120. Assembly 100 includes a piston eccentric 124 and a piston 126 operably connected to piston eccentric 124 as will be appreciated by a person of skill in the art. Piston 126 includes an arm with a first end 128 and a second end 130. First end 128 is operably connected to piston eccentric 124 and head 132 of piston 126 is disposed on second end 130.
To couple assembly 100 to portions of pump 10, piston eccentric 124 is removably coupled to shaft 16 in shaft chamber 58. Piston 126 is positioned so that its arm is in shaft chamber 58 and operably connected to piston eccentric 124. Piston 126 is positioned to extend in the axial direction in aperture 34 and may be inserted into shaft chamber 58 through slot 60 of housing 12. Cylinder member 118 is then slid over the head 132 of piston 126 to bear on bearing surface 38 of cylinder seat 36 and outer surface 122 of cylinder member 118 and may engage vertical face 40 of cylinder seat 36. Cylinder plug portion 114 of head 102 is inserted into cylinder member 118 such that O-ring 116 forms a seal with inner surface 120. Top cap 112 may be placed on top of head 102 and bolts 134 may then be inserted through bolt holes (not shown) in top cap 112 and cylinder head 102. Bolts 134 are received into bolt holes 48 of piston head mounting bosses 42 and bolts 134 are tightened down to removably couple piston head assembly 100 to housing 12. As further shown in
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To assemble assembly 200 on pump 10, piston eccentric 254 is removably coupled to shaft 16 in shaft chamber 58. Diaphragm support arm 250 is positioned in shaft chamber 58 and is operably connected to diaphragm eccentric 254. Diaphragm support arm 250 is positioned to extend in the axial direction in aperture 34 and may be inserted into shaft chamber 58 through slot 60. Diaphragm support ring 214 is then placed in engagement with sidewall 22 to bear thereon as described herein and shown in
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Another second interchangeable pump head like 102 and 202 may be disposed on pump housing 12 at a second end of housing 12 and simultaneously powered by motor 14. As will be appreciated by one of skill in the art, a two pump head design may be configured to act individually, in series for a two-stage pump, or in parallel. An operator may even mix and match the head types if desired.
As is evident from the foregoing description, certain aspects of the present invention are not limited to the particular details of the examples illustrated herein. It is therefore contemplated that other modifications and applications using other similar or related features or techniques will occur to those skilled in the art. It is accordingly intended that all such modifications, variations, and other uses and applications which do not depart from the spirit and scope of the present invention are deemed to be covered by the present invention.
Other aspects, objects, and advantages of the present invention can be obtained from a study of the drawings, the disclosures, and the appended claims.
Claims
1. A pump comprising:
- a housing having a head carrying area;
- a motor;
- a shaft rotated by said motor; and
- an assembly coupled to said head carrying area and said shaft; said assembly being selected from a first assembly and a second assembly wherein said first assembly comprises a piston pump head, a cylinder, a piston and piston eccentric, said cylinder disposed between said head and a portion of said head carrying area, said piston pump head coupled to said head carrying area, said piston at least partially disposed in said cylinder and said piston eccentric coupled to said piston; and wherein said second assembly comprises a diaphragm pump head, a diaphragm support, a diaphragm, and an eccentric, said diaphragm head coupled to said head carrying area, said diaphragm coupled to said diaphragm support, said eccentric coupled to said diaphragm support; and wherein
- said first assembly is interchangeable with said second assembly.
2. The pump of claim 1 wherein the said piston pump head and said diaphragm pump head are interchangeably mountable on said head carrying area.
3. The pump of claim 1 wherein said head carrying area comprises a cylinder seat, and sidewall, said cylinder seat carries said cylinder when said first assembly is selected, said sidewall carries a diaphragm support ring when said second assembly is selected and said diaphragm support ring and diaphragm pump head exert opposing forces on said diaphragm.
4. The pump of claim 3 wherein said head carrying area includes a plurality of piston head mounting bosses disposed radially inward of said sidewall and a plurality of diaphragm head mounting bosses disposed radially outward of said sidewall and wherein when said first assembly is selected, said piston pump head of said first assembly is coupled to said piston head mounting bosses and wherein when said second assembly is selected, said diaphragm pump head is coupled to said diaphragm head mounting bosses.
5. The pump of claim 4 wherein a top surface of said piston head mounting bosses is at or below a top surface of said annular step of said annular sidewall.
6. A pump comprising:
- a housing having a head carrying area;
- a motor coupled to a shaft; and
- one of a plurality of interchangeable assemblies coupled to said carrying area of said housing and said shaft, said plurality of interchangeable assemblies being selected from a group of assemblies consisting of a first assembly and a second assembly, said first assembly comprising a piston pump head, said second assembly comprising a diaphragm pump head.
7. A pump housing comprising:
- a head carrying area, said head carrying area adapted to couple to a head selectable from a group of heads consisting of a piston pump head and a diaphragm pump head.
8. The pump housing of claim 7 wherein said head carrying area comprises a cylinder seat adapted to carry a cylinder, wherein when said piston pump head is coupled to said carrying area and said cylinder is carried by said seat, said cylinder seat and piston pump head exert opposing forces on said cylinder; and wherein said cylinder seat does not carry said cylinder when said diaphragm head is coupled to said housing.
9. The pump housing of claim 8 wherein said head carrying area further comprises a plurality of piston head mounting bosses extending in a direction radially inward and away from a first inner side surface of a sidewall of said carrying area, said first inner surface at least partially delimiting an aperture, and a plurality of diaphragm head mounting bosses extending in a direction radially outward of an outer surface of said sidewall, wherein when said piston pump head is coupled to said head carrying area, it is coupled to said piston head mounting bosses and wherein when said diaphragm pump head is coupled to said head carrying area it is coupled to said diaphragm head mounting bosses.
10. The pump housing of claim 9 wherein said carrying area further comprises a second side surface, said second side surface also delimits said aperture, and said aperture receives a reciprocating diaphragm support when said diaphragm head is coupled to said diaphragm head mounting bosses.
11. The pump housing of claim 10 wherein said carrying area has a floor, said piston head mounting bosses extend in an axial direction away from said floor, said floor extends radially between said cylinder seat and said first side surface.
12. The pump housing of claim 11 wherein said cylinder seat is about said aperture.
13. The pump of claim 1 wherein said piston has a head and said diaphragm support has a head.
14. A first assembly and a second assembly comprising:
- a piston pump head, a piston and a cylinder forming part of said first assembly;
- a diaphragm pump head, and a diaphragm support forming part of said second assembly;
- said first assembly and said second assembly interchangeable with a pump housing having a head carrying area, said piston pump head couples to said head carrying area when said piston of said first assembly is coupled to an end of a shaft in said pump housing, said diaphragm pump head couples to said head carrying area when said diaphragm support arm of said second assembly is coupled to said end of said shaft.
Type: Application
Filed: Apr 14, 2014
Publication Date: May 28, 2015
Applicant: GARDNER DENVER THOMAS, INC. (Sheboygan, WI)
Inventor: Jeff WEISS (Sheboygan, WI)
Application Number: 14/252,530
International Classification: F04B 39/14 (20060101);