IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII
US006619348B2
(12) United States Patent ao) Patent No.: us 6,619,348 B2
Wang (45) Date of Patent: Sep. 16,2003
(54) ADJUSTABLE AND EXTENDIBLE
PLATFORM FOR WORKING TABLE
(76) Inventor: Tian Wang Wang, No. 45, Yi Chang East Road, Taiping City, Taichung Hsien (TW), 411
( * ) Notice: Subject to any disclaimer, the term of this patent is extended or adjusted under 35 U.S.C. 154(b) by 0 days.
(21) Appl. No.: 10/055,080
(22) Filed: Jan. 25, 2002
(65) Prior Publication Data
US 2003/0140985 Al Jul. 31, 2003
(51) Int. C I. B25II 1 00
(52) U.S. CI 144/287; 108/143; 144/286.5
(58) Field of Search 144/287, 286.5,
144/286.1; 83/477, 477.2, 468.7; 108/143,
90; 269/318
(56) References Cited
U.S. PATENT DOCUMENTS
2,937,765 A * 5/1960 Shank 108/143
A platform device for attaching to a working table includes a pair of rails slidably supported on a base, and a plate slidably supported on the rails. The base includes two grooves for slidably receiving the rails. One or more stops are secured on the base, and two end boards secured to the ends of the rails for selectively engaging with the stops and for limiting the movement of the rail relative to the base. One or more blocks are secured to the plate for selectively engaging with either of the end boards and for limiting the movement of the plate relative to the rail.
3 Claims, 6 Drawing Sheets
