CA2144507A1 - Chair Base Having Double-Tapered locking Hub - Google Patents
Chair Base Having Double-Tapered locking HubInfo
- Publication number
- CA2144507A1 CA2144507A1 CA2144507A CA2144507A CA2144507A1 CA 2144507 A1 CA2144507 A1 CA 2144507A1 CA 2144507 A CA2144507 A CA 2144507A CA 2144507 A CA2144507 A CA 2144507A CA 2144507 A1 CA2144507 A1 CA 2144507A1
- Authority
- CA
- Canada
- Prior art keywords
- chair base
- tapered
- double
- locking hub
- tapered locking
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C7/00—Parts, details, or accessories of chairs or stools
- A47C7/002—Chair or stool bases
- A47C7/004—Chair or stool bases for chairs or stools with central column, e.g. office chairs
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
- A47C3/20—Chairs or stools with vertically-adjustable seats
- A47C3/30—Chairs or stools with vertically-adjustable seats with vertically-acting fluid cylinder
Abstract
The chair of the present invention has a dual-tapered locking hub. A first tapered portion is provided for a major portion of the internal core, and a second tapered potion is provided in the remainder of the internal core. The taper angle of the second is greater than the taper angle of the first portion. The first tapered portion prevents wobbling of the central column within the chair base after extensive use, whereas the second tapered portion prevents creeping of the central column through the chair base and locks in the central column.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9404917A GB9404917D0 (en) | 1994-03-14 | 1994-03-14 | Chair base having double-tapered locking internal core |
GB9494917.8 | 1994-03-14 |
Publications (2)
Publication Number | Publication Date |
---|---|
CA2144507A1 true CA2144507A1 (en) | 1995-09-15 |
CA2144507C CA2144507C (en) | 1996-06-25 |
Family
ID=10751791
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002144507A Expired - Lifetime CA2144507C (en) | 1994-03-14 | 1995-03-13 | Chair base having double-tapered locking hub |
Country Status (3)
Country | Link |
---|---|
US (1) | US5692715A (en) |
CA (1) | CA2144507C (en) |
GB (1) | GB9404917D0 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6116555A (en) * | 1998-05-29 | 2000-09-12 | Krueger International, Inc. | Plastic chair base including hub with integral ring and oppositely-directed tapers |
US6290191B1 (en) * | 1999-08-19 | 2001-09-18 | Steelcase Development Corporation | Chair base |
US7841665B2 (en) * | 2007-06-01 | 2010-11-30 | Steelcase Inc. | Height adjustable armrest |
US8733838B2 (en) * | 2010-06-07 | 2014-05-27 | Scott Suprina | Floor track for seating system |
CN103054373A (en) * | 2011-10-24 | 2013-04-24 | 合肥杰事杰新材料股份有限公司 | Plastic chair leg |
EP3010374A1 (en) | 2013-06-21 | 2016-04-27 | Medway Plastics Corporation | Stacking ring for chair bases |
Family Cites Families (21)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US168383A (en) * | 1875-10-05 | Improvement in bases for revolving chairs | ||
US714764A (en) * | 1901-07-30 | 1902-12-02 | Heywood Bros And Wakefield Company | Swiveled chair. |
US2111642A (en) * | 1937-02-08 | 1938-03-22 | Francis D Saier | Candle holding device |
US2218583A (en) * | 1937-12-13 | 1940-10-22 | John J Marthaler | Chair base |
US2490210A (en) * | 1945-02-24 | 1949-12-06 | Roy A Cramer | Chair base |
US2617617A (en) * | 1950-03-21 | 1952-11-11 | Oscar J Krastel | Christmas tree clamp and supporting standard |
US2802635A (en) * | 1954-12-06 | 1957-08-13 | Northrop Aircraft Inc | Flex jack |
GB821587A (en) * | 1957-06-27 | 1959-10-07 | William Ivor Massil | Improvements in or relating to ferrules for the legs of articles of furniture |
US3348797A (en) * | 1962-12-17 | 1967-10-24 | Turbyfill Charles William | Golf flag pin base |
US3223368A (en) * | 1964-11-23 | 1965-12-14 | Charles R Pollock | Furniture pedestal |
US3323833A (en) * | 1965-07-06 | 1967-06-06 | Kasparian S Inc | Readily expandable pedestal construction for one or more seating units |
FR1471286A (en) * | 1966-12-01 | 1967-03-03 | Advanced tree stand or the like | |
DE2263657A1 (en) * | 1972-12-27 | 1974-07-04 | Wilde & Spieth | LEGS FOR OFFICE CHAIRS |
IT984809B (en) * | 1973-03-05 | 1974-11-20 | Ambasz E | MODULAR BASE FOR FURNITURE |
US4712758A (en) * | 1986-01-27 | 1987-12-15 | Casper Cuschera | Nested hub knock-down pedestal |
US4821986A (en) * | 1988-02-03 | 1989-04-18 | Steelcase Inc. | Multiple leg furniture base |
US5149035A (en) * | 1988-09-01 | 1992-09-22 | The Shaw-Walker Company | Chair base and post assembly for an office chair |
US4911391A (en) * | 1989-07-17 | 1990-03-27 | Henschel-Steinau, Inc. | Pedestal base |
US5044299A (en) * | 1990-05-07 | 1991-09-03 | Frank Ronald M | Seat construction for a boat |
US5377943A (en) * | 1993-12-21 | 1995-01-03 | Shepherd Products, Inc. | Chair base |
US5454536A (en) * | 1994-01-13 | 1995-10-03 | Westinghouse Electric Corporation | Chair base assembly |
-
1994
- 1994-03-14 GB GB9404917A patent/GB9404917D0/en active Pending
-
1995
- 1995-03-08 US US08/400,352 patent/US5692715A/en not_active Expired - Lifetime
- 1995-03-13 CA CA002144507A patent/CA2144507C/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
CA2144507C (en) | 1996-06-25 |
GB9404917D0 (en) | 1994-04-27 |
US5692715A (en) | 1997-12-02 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
EEER | Examination request | ||
MKEX | Expiry |
Effective date: 20150313 |