초록 ▼

A pump that has a flangeless valve plate, meaning that the valve plate has no flange through which bolts that secure the head to the pump extend. The pump has eccentrics and pistons that all have holes in them so that the pistons at opposite ends of the pump can be assembled to the shaft of the moto

A pump that has a flangeless valve plate, meaning that the valve plate has no flange through which bolts that secure the head to the pump extend. The pump has eccentrics and pistons that all have holes in them so that the pistons at opposite ends of the pump can be assembled to the shaft of the motor 180° out of phase. The pump further has a monolithic head that includes the two head members of the pump and the tube that connects them also has an integrally formed port. The pump is supported by elastomeric tubular members from its ports. The pump has a push-in fitting that can be pushed into a hole in a member such as the head, the housing or the base so that once pushed in, a ring around the fitting expands outwardly behind an edge of the body to trap the fitting in the opening.

대표청구항 ▼

1. An assembly of a pump comprising: a first housing and a second housing, said first housing having a first cylinder, said second housing having a second cylinder; a motor between said first and second housings; first and second piston assemblies coupled to opposite ends of a shaft of said motor, t

1. An assembly of a pump comprising: a first housing and a second housing, said first housing having a first cylinder, said second housing having a second cylinder; a motor between said first and second housings; first and second piston assemblies coupled to opposite ends of a shaft of said motor, the end of said shaft coupled to said first piston assembly extends into said first housing, the end of said shaft coupled to said second piston assembly extends into said second housing;each piston assembly including a piston and an eccentric having a counterweight portion and a stub portion, each said stub portion having a first axis; the eccentric having a hole with a second axis parallel to the first axis and spaced from the first axis, a respective end of the opposite ends of the motor shaft is received in each hole, each eccentric is coupled to the motor shaft, and wherein, each stub portion is journalled to a respective one of the pistons of the first and second piston assemblies, and wherein, the piston of the first piston assembly has at least a first alignment opening which opens through a surface of said piston and extends into said piston, said first alignment opening having an axis parallel to the first and second axes, and the eccentric of said first piston assembly has an alignment opening which opens through a surface of said eccentric and extends into said eccentric, and wherein when the eccentric alignment opening is aligned with the first alignment opening, the piston is in one of a top dead center position or a bottom dead center position, and a first straight pin is insertable into said eccentric alignment opening and said first alignment opening so the pin extends into both the eccentric alignment opening and the first alignment opening at the same time, and said pin is parallel to said second axis of said hole of the eccentric of the first piston assembly which receives said motor shaft. 2. An assembly of a pump comprising: a first housing and a second housing, said first housing having a first cylinder, said second housing having a second cylinder; a motor between said first and second housings; first and second piston assemblies coupled to opposite ends of a shaft of said motor, the end of said shaft coupled to said first piston assembly extends into said first housing, the end of said shaft coupled to said second piston assembly extends into said second housing;each piston assembly including a piston and an eccentric having a counterweight portion and a stub portion, each said stub portion having a first axis; each eccentric having a hole with a second axis parallel to the first axis and spaced from the first axis, a respective end of the opposite ends of the motor shaft is received in each hole, each eccentric is coupled to the motor shaft, and wherein, each stub portion is journalled to a respective one of the pistons of the first and second piston assemblies, and wherein, the piston of the first piston assembly has at least a first alignment opening which opens through a surface of said piston and extends into said piston, said piston of said first piston assembly has a second alignment opening which opens through a surface of said piston and extends into said piston, said first alignment opening having an axis parallel to the first and second axes, and the eccentric of said first piston assembly has an alignment opening which opens through a surface of said eccentric and extends into said eccentric, and wherein when the eccentric alignment opening is aligned with the first alignment opening, the piston is in a top dead center position and a first straight pin is insertable into said eccentric alignment opening and said first alignment opening so the pin extends into both the eccentric alignment opening and the first alignment opening at the same time; and when said eccentric alignment opening is aligned with said second alignment opening said piston is in a bottom dead center position and said first straight pin is insertable into said eccentric alignment opening and second alignment opening of said first piston assembly so the pin extends into both the eccentric opening and the second alignment opening of the first piston assembly at the same time. 3. The assembly of the pump of claim 1 further comprising a first alignment opening which opens through a surface of the piston of the second piston assembly and extends into the piston of the second piston assembly, and an alignment opening in the eccentric of said second piston assembly, said alignment opening in said eccentric of said second piston assembly opens through a surface of said eccentric and extends into said eccentric, wherein when said first alignment opening in said piston of said second piston assembly is aligned with said eccentric alignment opening of said second piston assembly and wherein when said first alignment opening of said piston of said first piston assembly is aligned with said eccentric alignment opening of said first piston assembly, said pistons are 180° out of phase, and said first straight pin is insertable into said eccentric alignment opening and first alignment opening of said first piston assembly so the pin extends into both the eccentric opening and the first alignment opening of the first piston assembly at the same time and said first straight pin is parallel to said second axis of said hole in said eccentric of said first piston assembly which receives said motor shaft, and a second straight pin is insertable into said eccentric alignment opening and first alignment opening of said second piston assembly so the pin extends into both the eccentric opening and the first alignment opening of the second piston assembly at the same time. 4. The assembly of the pump of claim 2, further comprising a magnetic fixture having two pins, one of which is said first straight pin and the other of which is another pin, said two pins are extendable simultaneously through the first, second and eccentric alignment opening. 5. The assembly of the pump of claim 1, wherein the first and second housing are mounted to a base, where at least one of said housings has a port, said port connected to an elastomer tubular member at a first end of said member, said tubular member defines at least one passage for communication of a gaseous fluid with said port, the elastomer member having a second end being connected to the base. 6. The assembly of the pump of claim 5, wherein the elastomer tubular member is relaxed when the pump is not operating so as to rest a portion of the pump on a mount and when the pump is operating the tubular member is subjected to pressure or vacuum that lifts the portion of the pump off the mount to support the housing having the port with vibration isolation. 7. The assembly of the pump of claim 1, further comprising a pump fluid port insert that has at least a portion which forms an insert, said insert portion inserted into an opening into said first or second housing, the insert having a deformable ring around a groove formed in said insert portion, said insert portion having an open end, when the insert portion is being inserted into the opening, said ring is compressed between the insert portion and a surface forming said opening into said first or second housing, and wherein when inserted the ring clears an end inner edge at an end of said opening with sufficient depth of insertion and the ring is expanded outwardly to inhibit removal of the fluid port insert portion. 8. The assembly of the pump of claim 7, wherein said pump fluid port insert further comprises a second ring axially spaced further away from said open end than the deformable ring, said second ring is a sealing ring between the pump fluid port insert portion and the surface forming said opening into said first or second housing. 9. The pump assembly of claim 8, wherein the deformable ring is an elastomeric ring, a metal split ring, or a plastic split ring. 10. The assembly of the pump of claim 1 further comprising a head member formed from a pair of head members; a tube spans the head members and is formed integral with each head member; a port is integrally formed with and extends from said tube to provide a passageway into the tube; the head members, tube and port are a single piece of continuous material, said tube provides a handle. 11. The assembly of the pump of claim 1 further comprising a cover and a sealing ring, wherein an opening in an end of the first housing has said cover fit therein, said sealing ring resides between the cover and an inner cylindrical surface of the housing to provide the only constant force holding the cover within the housing. 12. A pump fluid port insert with an insertable portion in combination with a first opening which opens into a hollow defined by a pump housing, said insertable portion insertable into said hollow, a pump fluid port and said first opening and said hollow comprising: a first groove in said insertable portion, said insertable portion having a first end, with the first end being sized to pass over an end inner edge of the first opening, said end inner edge defines an end of said first opening, at said end, said first opening opens into said hollow, said first groove adjacent said first end, the first groove being sized to hold a first resilient deformable element,wherein when the pump fluid port insert has the first deformable element and is inserted in the first opening, the first deformable element clears the end inner edge with sufficient depth that it expands outwardly to interfere with said inner edge, said inner edge forming an end of said first opening through a wall of the housing,the insertable portion has a second groove spaced from the first groove and the second groove being sized to hold a sealing ring said second groove axially spaced from said first groove and not overlapping said hollow. 13. The pump fluid port insert of claim 12, wherein the first deformable element is in the first groove. 14. The pump fluid port insert of claim 13, wherein the second deformable element is in the second groove. 15. Piston assemblies of a pump comprising: first and second piston assemblies coupled to opposite ends of a shaft of a motor, each piston assembly including a piston and an eccentric having a counterweight portion and a stub portion, each said stub portion having a first axis; each eccentric having a hole with a second axis parallel to the first axis and spaced from the first axis, a respective end of the opposite ends of the motor shaft is received in each hole, said eccentric is coupled to the motor shaft, and wherein, each stub portion is journalled to a respective one of the pistons of the first and second piston assemblies, and wherein, the piston of the first piston assembly has at least a first alignment opening which opens through a surface of said piston of said first piston assembly and extends into said piston, said first alignment opening having an axis parallel to the first and second axes, and the eccentric of said first piston assembly has an alignment opening which opens through a surface of said eccentric and extends into said eccentric wherein when the eccentric alignment opening is aligned with the first alignment opening, the piston is in one of a top dead center position or a bottom dead center position, and an axis extends through said alignment opening which opens through said surface of said eccentric, said axis of the eccentric alignment opening extending through said alignment opening is parallel to the motor shaft. 16. An assembly of a pump comprising: a first housing and a second housing, said first housing having a first cylinder, said second housing having a second cylinder; a motor between said first and second housings; first and second piston assemblies coupled to opposite ends of a shaft of said motor, the end of said shaft coupled to said first piston assembly extends into said first housing, the end of said shaft coupled to said second piston assembly extends into said second housing;each piston assembly including a piston and an eccentric having a counterweight portion and a stub portion, said stub portion having a first axis; the eccentric having a hole with a second axis parallel to the first axis and spaced from the first axis, a respective end of the opposite ends the end of the motor shaft is received in each hole, each said eccentric is coupled to the motor shaft, and wherein, each said stub portion is journalled to a respective one of the pistons of the first and second piston assembly, and wherein, the piston of the first piston assembly has at least a first alignment opening which opens through a surface of said piston and extends into said piston, said first alignment opening having its axis parallel to the first and second axes, and the eccentric of said first piston assembly has an alignment opening which opens through a surface of said eccentric and extends into said eccentric, and wherein when the eccentric alignment opening is aligned with the first alignment opening, the piston is in one of a top dead center position or a bottom dead center position, and wherein said piston alignment opening has opposite open ends, and wherein, a first straight pin is insertable into said eccentric alignment opening and said first alignment opening so the pin extends into both the eccentric alignment opening and the first alignment opening at the same time and at that time said pin extends through said opposite open ends of said piston alignment opening. 17. A fluid port insert with an insertable portion in combination with a fluid port which opens into a hollow defined by a pump housing, said insertable portion insertable into said fluid port, said fluid port insert and fluid port and said hollow comprising: said insertable portion having an end, with the end being sized to pass over an end inner edge of the fluid port, said end inner edge defines an end of said fluid port, said end is in said hollow, a first deformable element, sealing ring spaced axially further from said end of said insertable portion than said first deformable element, said first deformable element extending from a portion of said insert in the radial direction and the sealing ring extending from a portion of said insert in the radial direction, the radial direction being relative to the axial direction over which the first deformable elements and the sealing ring are spaced,wherein when the insertable portion is inserted in the fluid port, the first deformable element clears the end inner edge with sufficient depth that it expands outwardly to inhibit removal of the first deformable element over the inner edge, and said sealing ring element is in said fluid port which opens into said hollow, wherein said end inner edge forms an end of said fluid port opening through a wall of the housing.