Did You Know...
...that to encourage use of his new invention, the shopping cart, market owner Sylvan Goldman hired fake shoppers to push the carts around his store in Oklahoma City? Seems his customers were reluctant to give up their hand-carried baskets.
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| Number | Title | Issue Date |
| 7150315 | Downhole fluid disposal apparatus and methods A seal cartridge and barrel manifold seal are provided for use in a subterranean well and in a method to inject fluid, that is initially produced into the well from a subterranean formation or zone, into another subterranean formation or zone. The seal cartridge has... | 12/19/2006 |
| 6935846 | Dosing pump The invention relates to a dosing pump comprising a chamber, an inlet valve located in an inlet pertaining to said chamber, and an outlet valve located in an outlet pertaining to said chamber. The chamber is divided into two partial chambers (2, 18) by a sepa... | 08/30/2005 |
| 6347668 | Relievable check valve assembly for oil wells and water wells A relievable check valve assembly having various trigger forms for oil wells and water wells adapted to control the liquid flow when inserted tubing is being removed from a well.... | 02/19/2002 |
| 5382142 | Wall pump having backwash valve actuator A backwash valve for use in a sucker-rod actuated fluid pump, may be selectively actuated to permit both the standing and traveling ball valves to be unseated at the same time permit the pump to be backwashed and/or the production tubing string drained.... | 01/17/1995 |
| 5141411 | Center-anchored, rod actuated pump A fluid pump which is particularly useful in relatively deep and/or low pressure stripper wells. Stripper wells tend to produce sporadically and/or occasionally produce gas, and are often very sandy, have a tendency to become gas locked, and are susceptib... | 08/25/1992 |
| 4147476 | Pump assembly for an atomizing piston pump A pump assembly for an atomizing piston pump comprises a first piston slidably located in a first cylinder to define a first variable volume space and a second piston of smaller piston area than the first slidably located in a second cylinder to define a ... | 04/03/1979 |
