Self-balancing ladder and camera dolly (US6915878)

Application Number	Filed	Pub. Date	Title
US1999000325976	1999-06-04
US1995000479901	1995-06-07	1999-11-02	Transportation vehicles with stability enhancement using CG modification
US1995000384705	1995-02-03	1999-10-26	Transportation vehicles and methods
US1994000250693	1994-05-27	1997-12-24	Human transporter


	Parent Case:			CROSS REFERENCE TO RELATED APPLICATIONS The present application is a continuation-in-part application of copending U.S. application Ser. No. 09/325,976, filed Jun. 4, 1999, which is a continuation-in-part (CIP) of U.S. application Ser. No. 08/479,901, filed Jun. 7, 1995, and issued Nov. 2, 1999 as U.S. Pat. No. 5,975,225, which was a CIP of U.S. application Ser. No. 08/384,705, filed Feb. 3, 1995, and issued Oct. 26, 1999 as U.S. Pat. No. 5,971,091, which was a CIP of U.S. application Ser. No. 08/250,693, filed May 27, 1994, and issued Dec. 24, 1997 as U.S. Pat. No. 5,701,965, from which the present application claims priority, all of which applications and patents are incorporated herein by reference.
	Family:			Show 348 known family members
	First Claim: Show all 8 claims			1. A device for carrying a payload, which may include a user, over a surface, the device comprising: a. a payload support which supports the payload at a height above the surface, b. a ground-contacting module, mounted to the platform, including a plurality of laterally disposed ground-contacting members and defining a fore-aft plane; c. a motorized drive arrangement, coupled to the ground-contacting module; the drive arrangement, ground-contacting module and payload constituting a system; the motorized drive arrangement causing, when powered, automatically balanced operation of the system in an operating position that is unstable with respect to tipping in at least a fore-aft plane when the motorized drive arrangement is not powered; and d. an elevation mechanism for permitting variation of the height of the payload above the surface.
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	Drawing Descriptions:			Show drawing descriptions
	Description:			Show description
	Forward References:			Show 10 U.S. patent(s) that reference this one

U.S. References:

Go to Result Set: All U.S. references | Forward references (10) | Backward references (115) | Citation Link

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* some details unavailable

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