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 |
| 6698764 | Packing assembly The invention provides a packing assembly for rotating and/or oscillating machine shafts arranged in a machine housing. The packing assembly comprises a packing accommodation unit floating on said shaft. The packing accomodation unit is supported on the h... | 03/02/2004 |
| 6322081 | Circumferential seal with ceramic rotor A circumferential seal for sealing between a rotating shaft and a stationary housing circumscribing the shaft. The seal comprises a stator mounted to said housing and having a radially inward facing carbon portion and a rotor with a ceramic sealing member... | 11/27/2001 |
| 5607165 | Sealing system for a valve having biassed sealant under pressure The sealing system seals a moving element in a valve. The sealing system includes an internal seal between the valve body and moving element proximate the lading and an external seal between the valve body and moving element proximate the free end of the ... | 03/04/1997 |
| 4911482 | Ball joint The flexible ball joint is provided with a continuous ring mounted inside a casing and supported by an inner spherical surface of one of the segments of the casing and by a cylindrical portion of an end piece element. The respective contacting sides of th... | 03/27/1990 |
| 4582329 | Sealing bearing arrangement with convex bushing ring A self-aligning bearing arrangement has a compressible packing (20) for forming a gas-tight seal between the outer housing (2) and a rotatable shaft (10). A bushing ring (22) supports the shaft (10) and accommodates any misalignment thereof by having an i... | 04/15/1986 |
| 4579350 | Packless stuffing box for polish rods A stuffing box for the reciprocal polish rod of a producing oil and/or gas well bore, the rotatable rod of a pump, or the like and comprising a housing disposed around the outer periphery of the rod and concentrically arranged with respect thereto to prov... | 04/01/1986 |
| 4503730 | Lever control assembly A lever control assembly including a housing adapted for attachment to a support structure, the housing including a slot having oppositely disposed tracks defining a length of the slot and an edge between each end of the tracks defining a width of the slo... | 03/12/1985 |
| 4345766 | Apparatus for sealing an oil well pump polished rod An apparatus having a tubular housing adapted for securing to a wellhead of an oil well for sealing a reciprocating oil well pump polished rod extending through the tubular housing. The housing is formed in two operating tubular portions that are connecte... | 08/24/1982 |
| 4108381 | Rocket nozzle bearing seal The invention is a special, low-friction, compliant bearing seal for use between the stationary and movable members of a thrust-vectoring, rocket nozzle. The movable member of such nozzles typically contains the throat and expansion cone for acceleration ... | 08/22/1978 |
