CHRISTOPHER P RICCI
Broker in Braintree, MA

License number
Massachusetts 139360
Issued Date
Oct 1, 1993
Expiration Date
May 11, 1996
Type
Broker
Address
Address
Braintree, MA 02184
LicenseFiles verified this license of Nov 25, 2016 at the Mass.gov - Consumer Affairs and Business Regulation.

Professional information

Christopher Ricci Photo 1

Nut Assembly Using Partial Nuts To Limit Harmonic Error

US Patent:
5676019, Oct 14, 1997
Filed:
Jan 3, 1997
Appl. No.:
8/779253
Inventors:
Edwin K. Shenk - Westford MA
Christopher P. Ricci - Braintree MA
Assignee:
Polaroid Corporation - Cambridge MA
International Classification:
F16H 120
US Classification:
744248A
Abstract:
A nut assembly intended for use with a lead screw in precision movement devices for compensating for harmonic error from the lead screw by utilizing one or more partial nuts which are opposed along an axis of the lead screw such that the partial nuts ride the lead screw independently. An averaging apparatus is used to hold the partial nuts such that as the partial nuts follow the harmonic error, the error is averaged through the averaging apparatus to compensate for the harmonic error allowing the resulting motion of the nuts to be substantially linear.

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