Sperry Rand Wedge

These are photos of Chris Cerrato's Wedge.

7-9-02

Chris sent a few more photos of his wedge.

Here are some shots of Gary Harper's 295 Wedge. It's a basket case! He has a lot of work too do on this one!

5-22-02

7-13-02

Here are some shots of Brody's Wedge.

9-19-02

Brody put his Sperry Rand Wedge up for sale. I couldn't pass it up... Their so rare!

Here are a few shots of the Wedge Tranny.

9-19-02

9-21-02

Steering clutches

Found a Pat # on the Clutch Plate and looked it up. Found the original Design Patent with the US Patent Office. Ordered Copies. When I get them I'll post them.

Seat removed... Showing Brake Cables. and one Steering Cable, the other Steering Cable was removed.

9-21-02

Sperry Rand Tri-Cart

John Plessinger developed a concept for a three-wheel recreational vehicle. The "TriCart" (tm) manufacturing was licensed by the Sperry Rand Corporation which produced about 40,000 units. Unlike later designs, Plessinger’s model had the rider sitting "in" the cart instead of "on" it. His design was more stable and much less likely to tip over. Plessinger has since developed a four-wheel vehicle that would under cut the price of currents models on the market priced around $5000. He hopes to license its production to another manufacturer.

Design Evolution 4, Inc

John Plessinger, President

B.F.A. with honors, Industrial design Dayton Art Institute, Dayton, Ohio 1961-66

and in conjunction with University of Dayton, Dayton, Ohio 1963-66

Awarded Atelier Scholarship at Dayton Art Institute for 1965-66

M.F.A. with honors, Industrial Design/Composite Materials

Cranbrook Academy of Arts and Sciences, Bloomfield, Michigan 1968

Worked as a design consultant for Progressive Technology, Inc. from 1966 to 1969. Designed TriCart (tm), a three-wheeled, all terrain vehicle.

Sold the TriCart (tm) patent to Sperry Rand Corporation and signed contract as design manager. Produced composite components in polyester resins from 1969 to 1973.

Established own company in 1973 in partnership with Jerry Myers and Lorrie Plessinger. John became president of Design Evolution 4, Inc. Developed Resin Transfer Molding (RTM) techniques to overcome problems and continually strives to exceed customer expectations.

Proposes bids, estimates costs, negotiates terms and techniques for all the projects performed by Design Evolution.

10-6-02

Found a Tri-cart. It needs alot of work!