Patent US191516 - IMPROVEMENT IN TELESCOPIC OR HYDRAULIC ELEVATORS

Patents

Inventors: WILLIAM E. COMINGS, WILLIAM E. COMINGS
Current U.S. Classification: 60/565; 91/169; 92/52; 187/272; 277/577; 285/302

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Citing Patent	Filing date	Issue date	Original Assignee	Title
US4357995	22 Dec 1980	9 Nov 1982	Westinghouse Electric Corp.	Hydraulic system including oil replenishment for multi-stage hydraulic jack
US5341724	28 Jun 1993	30 Aug 1994		Pneumatic telescoping cylinder and method
US5850713	20 Dec 1996	22 Dec 1998	Yuasa Koki Co., Ltd	Device raising and lowering apparatus