Two-speed, self-propelled dolly for moving and elevating a mobil

Details Two-speed, self-propelled dolly for moving and elevating a mobil Two-speed, self-propelled dolly for moving and elevating a mobil

1975-11-17

1978-03-21

Gerin, Leonard H.

Machine element or mechanism

Gearing

Interchangeably locked

74335, 74339, 74360, F16H 308, B60K 2010, F16H 338

Patent

active

040796345

ABSTRACT:
A two-speed, self-propelled dolly intended for moving and elevating a load such as, for example, a mobile home. A generally rectangular frame is supported by a pair of endless belt tracks mounted on its opposite sides. A load engaging member is raised and lowered by an elevating unit connected with the frame, including at least one power driven screw jack. A pair of drive systems, one for each belt, is provided. Each drive system includes a drive wheel rotatably mounted on the frame and engaging the associated belt track. Each drive system includes a reversible, synchronous electric motor having an output shaft which is coupled to the associated belt track by a two-speed gear box which drives the track either at a traverse speed approximately equal to the walking pace of an adult human or at a relatively slower, load-carrying speed. Each drive system further includes a direction selector for controlling the rotation of the associated motor in forward and reverse directions, and a speed selector connected to the associated gear box for selecting driving motion of each belt track at the traverse speed or at the load-carrying speed.

REFERENCES:
patent: 2370885 (1945-03-01), Sohm
patent: 2961885 (1960-11-01), Dunn
patent: 3876045 (1975-04-01), Knarreborg

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