Claims
- 1. A method of lifting a rigid, heavy slab comprising:
a) placing a lift channel adjacent a side of the slab, and b) placing a travel channel adjacent an opposing side of the slab, c) fixing one end of a cable to the travel channel, d) extending the cable around a turn unit on the lift channel, and e) lifting the cable from the turn unit thus f) pulling each of the channels toward the other, thus g) capturing the slab in the channels and h) with continuing raising the cable, lifting the slab.
- 2. The method as stated in claim 1 further comprising:
i) guiding the cable above the surface of the slab by passing the cable through an eye connected to the lift channel above the level of the slab.
- 3. The method as stated in claim 2 further comprising:
j) locating the eye vertical above a point on the slab.
- 4. A grasping unit for transporting a rigid, heavy slab comprising:
a) a lift channel, b) a travel channel, c) each channel having an upper flange and a lower flange connected by a web, d) a cable fixed to the upper flange of the travel channel, e) a sheave journaled to the lift channel above the upper flange, f) a mast on the lift channel extending upward from the lift channel, and g) a cable guide near the top of the mast, and h) the cable extending from the travel channel to under the sheave and between the mast and the sheave and through the guide.
- 5. The structure as stated in claim 4 further comprising:
i) the lower flange beveled with the edge along the bottom of the lower flange and a slope to the top of the lower flange of each channel.
- 6. The structure as stated in claim 4 further comprising:
i) each channel is fabricated from a single plate of metal.
- 7. The structure as stated in claim 6 further comprising:
j) the lift channel and mast are fabricated from a single plate of metal.
- 8. A method of lifting a rigid, heavy slab comprising:
a) placing a first channel adjacent a side of the slab, and b) placing a second channel adjacent an opposing side of the slab, c) connecting the channels so that lifting the connection forces each of the channels toward the other channel, d) lifting the connection thus forcing the channels toward each other thus e) capturing the slab in the channels, and f) with continued lifting the connection, lifting the slab.
REFERENCE TO PROVISIONAL PATENT APPLICATION
[0001] The applicant claims the benefit of his U.S. Provisional Application No. 60/295,390, filed May 31, 2001.
Provisional Applications (1)
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Number |
Date |
Country |
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60295390 |
May 2001 |
US |