Invention Grant
- Patent Title: Grabity: A virtual reality haptic controller for creating gravity and stiffness during grasping motions through asymmetric vibrations
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Application No.: US17083804Application Date: 2020-10-29
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Publication No.: US11036299B2Publication Date: 2021-06-15
- Inventor: Inrak Choi , Sean Follmer , Heather Culbertson
- Applicant: The Board of Trustees of the Leland Stanford Junior University
- Applicant Address: US CA Stanford
- Assignee: The Board of Trustees of the Leland Stanford Junior University
- Current Assignee: The Board of Trustees of the Leland Stanford Junior University
- Current Assignee Address: US CA Stanford
- Agency: Lumen Patent Firm
- Main IPC: G06F3/01
- IPC: G06F3/01 ; A63F13/285 ; A63F13/24

Abstract:
A device to simulate kinesthetic pad opposition grip forces and weight for grasping virtual objects in a virtual reality is provided. The device includes a base, a sliding part, a braking mechanism and a swinging part with linear resonant actuators (e.g. voice coil actuators). The sliding part is connected with the base through a first prismatic joint which allows for single degree of freedom pinching motions for grasping an object. The swinging part connected to the sliding part and the base through revolute joints. The brake mechanism is used to create a grasping force. The linear resonant actuators provide both touch sensation at initial contact and sensation of weight when lifting the object.
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