Supporting device for height-adjusting of floors

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Description

FIG. 1 is a pespective view of supporting device for height-adjusting of floor, showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof.

Referenced Cited
U.S. Patent Documents
2380692 July 1945 Gunnison
3398933 August 1968 Haroldson
3645054 February 1972 Olvera
4277923 July 14, 1981 Rebentisch et al.
4685258 August 11, 1987 Av-Zuk
Foreign Patent Documents
3411953 October 1985 DEX
1340185 December 1973 GBX
Patent History
Patent number: D320485
Type: Grant
Filed: May 17, 1989
Date of Patent: Oct 1, 1991
Inventor: Chien-Teh Huang (Shan-Chung City, Taipei Hsien)
Primary Examiner: Wallace R. Burke
Assistant Examiner: Holly H. Baynham
Attorney: Leonard Bloom
Application Number: 7/352,907
Classifications
Current U.S. Class: Jack Or Jackstand (D34/31)