Abstract: A portable reciprocating pump assembly delivers lubricant from a reservoir and includes a housing mountable on the reservoir and a pumping tube assembly for directing lubricant from the reservoir and into the housing. The tube assembly has a reciprocating plunger and a shovel assembly attached to the lower end of the plunger and having a disk member and a valve. A drive mechanism for operating the pumping tube assembly is disposed within the housing and includes a drive shaft and a cam mounted eccentrically on the shaft and disposed within an opening of a follower. The follower is coupled with the plunger such that rotation of the drive shaft reciprocates the plunger along a vertical axis. A motor is connected with the drive shaft and actuates the drive mechanism and a battery provides power to the motor such that the pump assembly operates without connection to a separate power source.

Abstract: A double acting pneumatic motor having a cylinder, a piston within the cylinder that divides the cylinder into two cavities that vary in volume with movement of the piston, a source of fluid under pressure, and a valve assembly for alternately directing fluid to one cavity while exhausting the other cavity to make the piston reciprocate. The valve assembly resides in a housing, and includes a cylindrical spool that moves axially between two positions with at least one enlarged diameter portion between smaller diameter portions at each end. The pneumatic motor may be provided with a cover for attenuating sound from the exhaust.