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Compressed-air Mobile Lift
Page 83
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APNEUMATIC mobile crane, which can be used where a supply of compressed air at suitable pressure is available, has been developed and built by Stanhay (Ashford), Ltd., Elwick Works, Ashford, Kent. The main structure is built up of 4-in. by 2-in. channel-section steel, and the jib from 2-in. by 11-in. boxed channel section.
Lifting is performed by a 10-in. pneumatic unit coupled by cable from the piston-rod cross-bar to the tail end of the jib. Jib control is by a single lever, the Control valve automatically returning to the neutral position on release of the lever.
• As the crane is particularly sensitive in operation, precise placing of, say, an engine in a chassis is possible. It is designed for a safe working load of 10 cwt.
Its general dimensions are: Height, 6 ft.; length, excluding outreach of the jib, 6 ft.; width, 4 ft. 3 in.; jib outreach, 6 ft.; maximum height of jib hook, 9 ft. 4 in.; minimum height of hook, 1 ft 9 in.