Mitch F Marcovici

44111665, Oct 25, 1983

Mar 16, 1981

6/244444

Mitch Marcovici - Murray Hill NJ

Keuffel & Esser Company - Morristown NJ

F16H 2508
F16H 2518

74 89

A linear actuator mechanism which comprises skewed roller members arranged about a drive shaft and translates rotation of the drive shaft to linear displacement along the shaft includes a pair of body members having a ball joint between them which serves as a pivot about which adjustable spring compression constrains each of the three normal degrees of freedom in the body member pair to provide a kinematic union which eliminates indiscriminate displacement between the actuator mechanism and the drive shaft.

59310626, Aug 3, 1999

May 13, 1997

8/854908

Mitch Marcovici - Murray Hill NJ

B25B 1700

81 5731

A mechanical rectifier efficiently rectifies or converts alternative clockwise and counterclockwise rotation of a main handle or other active driving element into unidirectional rotation of a main shaft. This mechanical rectifier is useful in manual tools such as a "no-waste screwdriver", which eliminates the wasted hand motion inherent in all ordinary hand tools, and in energy-saving devices such as a wave-powered electrical generator. The basic mechanical rectifier includes a shaft, two driving elements, and a reversing mechanism coupling the two driving elements so that they can only rotate in opposite directions. Each of the two driving elements has a separate one-way roller clutch pressed in its bore in proper orientation and riding on the shaft so that, whichever direction a driving element is rotated, it always turns the shaft in the same direction. Therefore, a tool bit at one end of the shaft always serves to tighten a fastener, while a tool bit at the opposite end only serves to loosen a fastener. To switch from tightening a fastener to loosening it (or vice versa), the main handle is pulled out of engagement with a hub of one driving element and inserted for engagement with a hub of the opposite driving element.