Linear drive unit

Details Linear drive unit Linear drive unit

1985-06-20

1987-03-10

Reeves, Robert B.

Railways

Traction

Longitudinal rotary shafts

104250, B61B 1312, B61L 304

Patent

active

046483250

ABSTRACT:
A linear drive unit having a carriage reciprocal along a path of travel and having a plurality of pairs of angularly adjustable drive wheels engaging opposite sides of a rotatable drive tube whereby rotation of the drive tube imparts linear motion to the carriage. The angle of the drive wheels is controlled by a remotely-operable air motor mounted directly on the carriage. A plurality of cams provide controlled acceleration and deceleration of the carriage adjacent the ends of its path of travel. A selectively operable inching control is remotely operable to provide for a reduced speed of travel of the linear drive unit. The linear drive unit is easily associated with the mass to be moved, such as a travelling hoist, and the forces generated by opposed drive wheels compressively engaging the drive tube are self-contained within the carriage. Additional control cams can be provided along the path of travel, if additional stopping locations are desired.

REFERENCES:
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patent: 3356040 (1967-12-01), Fonden
patent: 3621790 (1971-11-01), Broome
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patent: 4036148 (1977-07-01), Jones et al.
patent: 4203511 (1980-05-01), Uhing
patent: 4353306 (1982-10-01), Rohrbach et al.
patent: 4355580 (1982-10-01), Scheel
patent: 4367683 (1983-01-01), Tokunaga
Gutekunst et al application, Ser. No. 598,847, filed Apr. 10, 1984.

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