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Pumping apparatus with electromagnetically propelled piston
US 2,701,331 A
Filed
: 08/29/1949
Issued
: 02/01/1955
Est. Priority Date
: 08/29/1949
Status: Expired due to Term
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Current Assignee
Holst, John C.
Original Assignee
Holst, John C.
Inventors
Holst, John C.
Application Number
US03/112,911
Time in Patent Office
1,982 Days
Field of Search
US Class Current
318/128
CPC Class Codes
F04B 17/044
using solenoids directly ac...
F04B 5/02
with double-acting pistons
F04B 53/166
Cylinder liners
F05C 2201/0475
Copper or alloys thereof
F05C 2201/0478
Bronze (Cu/Sn alloy)
F05C 2251/125
non-magnetic
H02K 33/14
wherein the alternate energ...
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