Battery-operated reciprocating pump for lubricants

A reciprocating pump assembly for delivering lubricant from a reservoir, the reservoir having a body defining an interior storage chamber for containing a quantity of lubricant and a cover attached to an upper end of the body, the pump assembly comprising:

• a housing mountable on the reservoir cover and having a lubricant chamber with an outlet and a drive chamber spaced from the lubricant chamber;
• a drive mechanism disposed at least partially within the housing drive chamber;
• an electric motor connected with the housing and having a rotatable shaft coupled with the drive mechanism such that rotation of the motor shaft actuates the drive mechanism;
• and
• a pumping tube assembly including an elongated tubular body, the tubular body having an upper end fixedly attached to the housing and a lower end disposable within the reservoir storage chamber, an elongated plunger disposed within the tubular body so as to define a lubricant passage between the plunger and the tubular body, the plunger having a lower end and an upper end coupled with the drive mechanism such that actuation of the drive mechanism reciprocates the plunger along a plunger axis, and a shovel assembly including a circular disk fixedly attached to the lower end of the plunger and having at least one axial opening and an annular valve slidably disposed about the plunger and having at least one axial opening;
• wherein the valve is disposable against the disk to prevent lubricant flow through the at least one disk opening when the plunger displaces in a first, upward direction along the plunger axis so as to displace lubricant within the lubricant passage into the lubricant chamber and out of the housing outlet and alternatively spaceable from the disk so as to permit lubricant flow from the reservoir storage chamber through the at least one disk opening and the at least one valve opening and into the lubricant passage when the plunger displaces in a second, downward direction along the plunger axis.

A reciprocating pump assembly for delivering lubricant from a reservoir, the reservoir having a body defining an interior storage chamber for containing a quantity of lubricant and a cover attached to an upper end of the body, the pump assembly comprising:

• a housing including a housing lower member with a cylindrical body mountable on the reservoir cover and having a lubricant chamber and an outlet and a housing upper member with a tubular body having an interior drive chamber and an adapter block attached to the tubular body, the housing lower member being releasably connected with the adapter block of the housing upper member;
• a pumping tube assembly having an upper end connected with the housing and a lower end disposable within the reservoir storage chamber, the pumping tube assembly including an elongated plunger extending through the housing lower member and configured to linearly displace along a plunger axis so as to displace lubricant within the storage chamber to the lubricant chamber of the housing lower member and through the housing outlet;
• a drive mechanism disposed at least partially within the housing drive chamber and configured to drive the plunger to reciprocate along the plunger axis;
• an electric motor connected with the housing and having a rotatable shaft coupled with the drive mechanism such that rotation of the motor shaft actuates the drive mechanism;
• and
• a battery electrically connected with the motor and mounted on the motor or on the housing, the battery providing electrical energy to the motor such that the pump assembly operates without connection to a power source separate from the pump assembly.

A reciprocating pump assembly for delivering lubricant from a reservoir, the reservoir having a body defining an interior storage chamber for containing a quantity of lubricant and a cover attached to an upper end of the body, the pump assembly comprising:

• a housing mountable on the reservoir cover and having a lubricant chamber with an outlet and a drive chamber spaced from the lubricant chamber;
• a pumping tube assembly having an upper end coupled with the housing and a lower end disposable within the reservoir storage chamber, the pumping tube assembly including an elongated plunger configured to linearly displace along a plunger axis so as to displace lubricant within the storage chamber to the housing lubricant chamber and through the housing outlet;
• a drive mechanism disposed at least partially within the housing drive chamber and configured to drive the plunger to reciprocate along the plunger axis;
• an electric motor connected with the housing and having a rotatable shaft coupled with the drive mechanism such that rotation of the motor shaft actuates the drive mechanism;
• and
• a battery electrically connected with the motor and mounted on the motor or on the housing, the battery providing electrical energy to the motor such that the pump assembly operates without connection to a power source separate from the pump assembly;
• wherein the housing includes a tubular body, the tubular body having a hollow interior providing the drive chamber, two opposing open axial ends and at least one opening extending through a side of the tubular body, a cover enclosing one of the axial ends of the body and an adapter block attached to the other one of the axial ends of the body and having a central opening;
• wherein the drive mechanism includes a rotatable drive shaft coupled with the motor shaft, the drive shaft being disposed within the housing interior and extending through the at least one opening and along an axis perpendicular to a plane containing the plunger axis;
• and
• wherein the motor is connected with the tubular body of the housing so as to be disposed externally of the housing drive chamber.

A reciprocating pump assembly for delivering lubricant from a reservoir, the reservoir having a body defining an interior storage chamber for containing a quantity of lubricant and a cover attached to an upper end of the body, the pump assembly comprising:

• a housing mountable on the reservoir cover and having a lubricant chamber with an outlet and a drive chamber spaced from the lubricant chamber;
• a pumping tube assembly having an upper end coupled with the housing and a lower end disposable within the reservoir storage chamber, the pumping tube assembly including an elongated plunger configured to linearly displace along a plunger axis so as to displace lubricant within the storage chamber to the housing lubricant chamber and through the housing outlet;
• a drive mechanism disposed at least partially within the housing drive chamber and configured to drive the plunger to reciprocate along the plunger axis;
• an electric motor connected with the housing and having a rotatable shaft coupled with the drive mechanism such that rotation of the motor shaft actuates the drive mechanism;
• and
• a battery electrically connected with the motor and mounted on the motor or on the housing, the battery providing electrical energy to the motor such that the pump assembly operates without connection to a power source separate from the pump assembly;
• wherein the plunger has an upper end connected with the drive mechanism and a lower end disposed within the reservoir chamber;
• and
• wherein the pumping tube assembly further includes an elongated tubular body, the tubular body being fixedly connected with the housing and disposed about the plunger so as to define an annular flow passage between the plunger and the tubular body, and a shovel assembly including a circular disk fixedly attached to the lower end of the plunger and having at least one axial opening and an annular valve slidably disposed about the plunger and having at least one axial opening, the valve being disposable against the disk to prevent lubricant flow through the at least one disk opening when the plunger displaces in a first, upward direction along the plunger axis and alternatively spaceable from the disk so as to permit lubricant flow through the at least one disk opening and the at least one valve opening when the plunger displaces in a second, downward direction along the plunger axis.