United States Patent D421516

Hung, Michael (9-16, Nan Kan Hsia, Nan Kan, Lu Chu Hsiang, Tao Yuan County, TW)
Application Number:
Publication Date:
Filing Date:
Primary Class:
Field of Search:
D34/32, D34/28, D34/31, D34/33, 254/88, 254/84, 254/11, 254/93, 254/45
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US Patent References:
5878996Lifting jack with safety and release systemMarch, 1999Loan254/8B
D398730Hydraulic floor jackSeptember, 1998LinD34/31
D388926Automotive jackJanuary, 1998SorensenD34/31
5618029Jack safety deviceApril, 1997Chung254/8B
D364026JackNovember, 1995HungD34/31
D358923Hydraulic floor jackMay, 1995HawkinsD34/31
D345843Lifting jackApril, 1994CollinsD34/31
5221073Safety floor jackJune, 1993Shockley254/8B
5201494Hydraulic jack and pump usable therewithApril, 1993Lundman254/8B
5042777Safety latch for a portable hydraulic jackAugust, 1991Applebaum254/8B
D285855Vehicle service jackSeptember, 1986PerssonD34/31
4473213Service jack including rack and pinion driven pump pistonSeptember, 1984Decker254/93H
D263128Floor jackFebruary, 1982Glover, Jr. et al.D34/31
4277048Hydraulic actuator with automatic travel limit bypassJuly, 1981Okuda254/8B
D253696Hydraulic lifting jackDecember, 1979SuzukiD34/31
3664635N/AMay, 1972Kincaid254/88

Primary Examiner:
Lucas, Susan J.
Assistant Examiner:
Ramirez, Cynthia
Attorney, Agent or Firm:
Wenderoth, Lind & Ponack, L.L.P.
1. The ornamental design for a jack, as shown and described.


FIG. 1 is a left side perspective view of a jack showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.