Machine element or mechanism – Mechanical movements – Reciprocating or oscillating to or from alternating rotary
Patent
1983-10-03
1986-06-10
Feinberg, Craig R.
Machine element or mechanism
Mechanical movements
Reciprocating or oscillating to or from alternating rotary
74441, 74467, 744248R, F16H 2702, F16H 118
Patent
active
045935726
ABSTRACT:
A sealed, precision screw feed device for equipment of the type having a stationary base and a reciprocating carriage member. The device has an elongate tubular housing carrying a shaft with a precision thread, one end of the shaft projecting from one end of the housing and being adapted for connection to a suitable drive motor carried on the base. A nut is disposed completely within the housing, carried by the shaft and connected with a hollow thrust rod that projects from the opposite end of the housing. The housing contains a quantity of lubricant; shaft seals at its opposite ends prevent the lubricant from leaking out past the threaded shaft and thrust rod. The exposed end of the thrust rod has a universal joint which is connected to the carriage member. Also, the bore of the thrust rod is sealed off, to prevent lubricant from escaping through this avenue. The disclosed arrangements provide precision movement of the carriage member, even over extended periods of use. The operation is characterized by minimal wear of the various parts, and significantly reduced operating temperatures, especially at the more frequent points of contact of the nut and shaft. Lubricant can be temperature-controlled at an external point and pumped through the housing to further minimize wear.
REFERENCES:
patent: 2338271 (1944-01-01), Ulanet
patent: 2403092 (1946-07-01), Lear
patent: 2464873 (1949-03-01), Lear
patent: 3489395 (1970-01-01), Glassmeyer
patent: 3831460 (1974-08-01), Linley
patent: 4241814 (1980-12-01), Masclet
Feinberg Craig R.
Lehmann H. Gibner
Lehmann K. Gibner
Universal Thread Grinding Company
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