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Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Inventor:
Bergstein; Frank D.
Address:
Cincinnati, OH
No. of patents:
8
Patents:












Patent Number Title Of Patent Date Issued
5947678 Water wheel with cylindrical blades September 7, 1999
An improved liquid rotor device is provided having a cylindrically-shaped hub, which is supported by a horizontal shaft, and having several curved blades which are attached to the outer portions of the rotating hub. The horizontal shaft preferably rotates with the hub so that it can
5333996 Dual fluid rotor apparatus August 2, 1994
A fluid rotor is disclosed for turning electrical generators or other mechanical equipment. The fluid rotor contains multiple curved blades which are in a single plane of rotation, and which are spaced closely together so as to maximize the efficiency of the captured fluid. The open
5246342 Wind rotor apparatus September 21, 1993
A wind rotor is disclosed for turning electrical generators or other mechanical equipment. The wind rotor contains multiple curved blades which are in a single plane of rotation, and which are spaced closely together so as to maximize the efficiency of the captured wind. The open blades
5088884 Rotor assembly for fluid driven engine February 18, 1992
A rotor having an elongated cylindrical body which surrounds a vertically disposed bearing shaft fixedly secured at its lowermost end to a supporting base, the rotor mounting a bearing pad at its uppermost end positioned to be seated on the upper end of the bearing shaft so as to rot
4960363 Fluid flow driven engine October 2, 1990
A fluid flow driven engine comprising two counter-directionally rotating rotors rotatably mounted on a base which can be used to secure the fluid flow driven engine in the path of a flowing fluid, the rotors comprising cylindrical drums with a plurality of circumferentially spaced impell
4083486 Carton with sift-proof end closure April 11, 1978
A carton end closure in which an inner pair of closure flaps is provided with score lines extending parallel to and in close proximity to the inner edges of the closure flaps, the score lines defining grooves in the outer surfaces of the flaps, the inner flaps also being provided with tr
4032060 Carton with self-sealing reclosable end closure June 28, 1977
A rectangular carton having a self-sealing reclosable end closure which may be used with or without a liner, the end closure being adapted to lie within the confines of the carton body and having an opposing pair of vertically disposed sealing flaps biased into face-to-face contacting
3981432 Carton with tightly sealed end closures September 21, 1976
A tightly sealed carton structure wherein an opposing pair of innermost end closure flaps are hingedly connected to the carton body walls along lines of articulation defining inwardly projecting ridges, the innermost closure flaps each comprising first and second flap parts hingedly conn










 
 
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