United States Patent 2734667
US Patent References:
/0156279.html
- - 0156279

/0169974.html
- - 0169974

Well point
- - 1648587

Nondrip liquid dispenser
- - 1871655

Concrete pump
- - 1991342


Publication Date:
02/14/1956
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Primary Class:
222/255
Other Classes:
222/207, 417/568, 222/383.100, 417/900, 222/450, 222/383.300, 222/380, 417/529
International Classes:
F04B1/02; F04B9/02; F04B15/02; F04B43/02; F04B53/00; F04B53/10; F04B53/12; F04B1/00; F04B15/00
US Patent References:
2295774Pump valve
2461332Lubricant compressor
2609966Hot fudge dispenser