A Valveless Pump for Gearset Grease 



It sucks out the old grease, pumps it into an- 

 other receptacle and feeds in fresh lubricant 



Below: Details of 

 the valveless pump. 

 The horizontal 

 flange at the bot- 

 tom of the cylinder 

 forms practically a 

 double bottom 



Filling a transmission gear- 

 set with new grease which is 

 carried in the valveless pump 



FILLING the transmission 

 gearbox or removing the 

 grease from it or from the 

 rear axle of an automobile is 

 generallyan operation which re- 

 quires a man to put on overalls 

 and gloves if he is to be at all pre- 

 sentable when he finishes the job. 



This drudgery can now be 

 done away with by using the 

 simple valveless bucket shown 

 in the accompanying illustra- 

 tions. This can be used to fill the gearset 

 or axle with grease or oil carried in the 

 bucket itself; to feed in a different lubricant 

 instead of that in the bucket, or to suck old 

 grease out of either part and pump it into 

 some other receptacle for use elsewhere. 



The device consists of a heavy sheet-iron 

 receptacle in the shape of an ordinary 

 bucket and fitted with a central brass tube 

 inserted in a cast cylinder at the bottom of 

 the bucket. This cylinder has a horizontal 

 flange at the bottom which forms prac- 

 tically a double bottom, the space between 

 the real and false bottom opening to the 

 lower end of a flexible metal hose. 



The brass tube may be turned one- 

 quarter turn either way to bring a rect- 

 angular hole near its bottom into register 

 with the passage to the hose or with the 



Sucking old grease out of a 

 rear axle housing . Not a drop 

 is spilled on the woodwork 



bottom of the bucket 

 through holes in the hori- 

 zontal casting flange. In 

 the latter case a charge of 

 the grease in the bucket is 

 sucked into the brass tube 

 by the upward stroke of a 

 small piston inside of the 

 tube, operated through a 

 small finger grip on the 

 outer and upper end of the 

 piston rod. 

 The brass tube is then turned one- 

 quarter way around and the piston forced 

 down by an easy downward pumping 

 stroke of the lever handle with one hand, 

 leaving the other free to guide the free end 

 of the hose, the grease meantime being 

 forced out as the piston descends. 



Similarly, closing the bottom of the 

 bucket and opening the passage to the hose 

 by turning the tube another quarter revolu- 

 tion sets the device so that an upward 

 stroke of the piston will suck old grease out 

 of the gearset or rear axle. The next 

 downward stroke will force it into another 

 receptacle. 



There is no dirt or muss, and the old 

 greasy overalls may be discarded without 

 any regrets from the list of indispensables 

 around the automobile. 



Maybe you have special needs. Write to the editor abouc anything within the scope 

 of the magazine. He will be glad to help you. 



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