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A variable period vibration protective pendulum isolator (1) for structures (6). It comprises a base (2) defining a load bearing surface (3) and at least one load transmitting slider (9) located in a load bearing component (13) translatably against the load bearing surface. The load bearing surface is made of a hard non-corrosive material having coefficient of friction values from 0.01 to 0.20 and is spherical shallow concave surface whose inclination progressively increases and then decreases towards the centre such that the inclination at the centre is zero. The shallow concave surface is defined by the parametric equation 1_ V2r + 2dx sgn(x)y=bwherein b has values 0.01 to 1.0 m and dd + x sgn(x)has values 0.01 to 3.0 m such that the ratio b/d2 ranges between 0.1 and 100 per m and x and y are slider displacements along X and Y axes respectively from the centre of the load bearing surface and have values from 0.0 to 3.0 m and 0.0 to 0.5 m respectively. The load transmitting slider is made of a hard non-corrosive material and is spherical or hemispherical comprising convex top surface (10) located in a concave cavity (11) at the basal end (12) of the load bearing component and a convex bottom surface (14) translatably located against the load bearing surface. The base and load bearing component are made of hard non-corrosive material (Fig 1).
Notices, Deadlines & Correspondence
Patent Information
Applicants
INDIAN INSTITUTE OF TECHNOLOGY
Inventors
1. RAVI SINHA
2. MURNAL PRANESH
Specification
Documents
Application Documents
| # | Name | Date |
|---|---|---|
| 1 | 867-mum-2001-correspondence(ipo)-(14-10-2004).pdf | 2004-10-14 |
| 2 | 867-MUM-2001-CORRESPONDENCE(RENEWAL PAYMENT LETTER)-(11-09-2006).pdf | 2006-09-11 |
| 3 | 867-MUM-2001-CORRESPONDENCE(RENEWAL PAYMENT LETTER)-(16-06-2011).pdf | 2011-06-16 |
| 4 | Form 27 [16-01-2017(online)].pdf | 2017-01-16 |
| 5 | 867-MUM-2001-RELEVANT DOCUMENTS [28-03-2018(online)].pdf | 2018-03-28 |
| 6 | abstract1.jpg | 2018-08-08 |
| 7 | 867-mum-2001-form 8(9-7-2004).pdf | 2018-08-08 |
| 8 | 867-mum-2001-form 3(11-9-2001).pdf | 2018-08-08 |
| 9 | 867-mum-2001-form 26(11-9-2001).pdf | 2018-08-08 |
| 10 | 867-mum-2001-form 2(granted)-(11-9-2001).pdf | 2018-08-08 |
| 12 | 867-mum-2001-form 19(3-10-2003).pdf | 2018-08-08 |
| 13 | 867-mum-2001-form 1(11-9-2001).pdf | 2018-08-08 |
| 14 | 867-mum-2001-drawing(11-9-2001).pdf | 2018-08-08 |
| 15 | 867-MUM-2001-CORRESPONDENCE(RENEWAL PAYMENT LETTER)-(4-9-2009).pdf | 2018-08-08 |
| 16 | 867-mum-2001-correspondence(14-1-2005).pdf | 2018-08-08 |
| 17 | 867-mum-2001-claims(granted)-(11-9-2001).pdf | 2018-08-08 |
| 19 | 867-mum-2001-cancelled pages(11-9-2001).pdf | 2018-08-08 |
| 20 | 867-mum-2001-abstract(11-9-2001).pdf | 2018-08-08 |
| 22 | 867-MUM-2001-RELEVANT DOCUMENTS [22-03-2019(online)].pdf | 2019-03-22 |
| 23 | 867-MUM-2001-RELEVANT DOCUMENTS [05-04-2020(online)].pdf | 2020-04-05 |
| 24 | 867-MUM-2001-RELEVANT DOCUMENTS [07-09-2021(online)].pdf | 2021-09-07 |