Sand jack apparatus

Details Sand jack apparatus Sand jack apparatus

1996-10-11

1998-10-06

Watson, Robert C.

Implements or apparatus for applying pushing or pulling force

Screw

Special engaging feature

254133, B66F 336

Patent

active

058165622

ABSTRACT:
A sand jack having a box containing sand and a lid are joined to a screw jack and both temporarily support a structure. When it is desired to remove the screw jack, sand is released from the box to reduce loading on the screw jack and enable the screw jack to be removed or to allow the nut on the screw jack to be rotated.

REFERENCES:
patent: 3222030 (1965-12-01), Thorpe
patent: 3655161 (1972-04-01), Schuelen
patent: 3827595 (1974-08-01), Reynolds
patent: 4632268 (1986-12-01), Melzi et al.
patent: 4817935 (1989-04-01), Varga
1986 Webster's Third New International Dictionary, s.v. "sand jack.".

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