GB2354704A - Tip-seat chair - Google Patents
Tip-seat chair Download PDFInfo
- Publication number
- GB2354704A GB2354704A GB9923185A GB9923185A GB2354704A GB 2354704 A GB2354704 A GB 2354704A GB 9923185 A GB9923185 A GB 9923185A GB 9923185 A GB9923185 A GB 9923185A GB 2354704 A GB2354704 A GB 2354704A
- Authority
- GB
- United Kingdom
- Prior art keywords
- seat
- torsion spring
- tip
- squab
- chair
- 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.)
- Withdrawn
Links
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47C—CHAIRS; SOFAS; BEDS
- A47C1/00—Chairs adapted for special purposes
- A47C1/12—Theatre, auditorium, or similar chairs
- A47C1/121—Theatre, auditorium, or similar chairs having tipping-up seats
Abstract
A tip-seat chair having a seat frame and a seat squab (2), the seat squab (2) being pivotably connected to the frame and being biased in into a tipped up position by means of a torsion spring (20). The torsion spring (20) passes through the seat squab (2) and is connected at one end to the seat squab (2) and at the other end to the seat frame.
Description
2354704 TIP-SEAT CHAIR This invention relates to tip-seat chairs, such as
are used in auditoria to provide high capacity seating.
When an individual tip-seat chair is not occupied the seat squab tips up automatically, thereby providing access to further chairs, without the need for a dedicated access aisle.
BACKGROMM TO THE INVENTION In conventional tip-seat chairs, the seat squab is biased into the raised position by a counterweight system or a coil spring assembly.
Counterweight systems are unreliable because, in order to prevent the seat squab rising too quickly when the seat is vacated, the raising force applied by the counterweight must be only just sufficient to overcome the mass of the seat squab. Consequently, the seat squab can become stuck, particularly if the seat frame is misaligned or is distorted in use.
Furthermore, the counterweight system increases the weight of the tip-seat. This is undesirable both in terms of transport cost and in terms of the loading imposed by the seat on the auditorium floor.
The use of a coil spring assembly to bias the seat squab into the raised position overcomes some of the weight disadvantages of a counterweight system, but such assemblies tend to be bulky.
SUMMARY OF THE INVENTION
According to the present invention there is provided a tip-seat chair having a seat frame and a seat squab, the seat squab being pivotably connected to the frame and being biased into a tipped up position by means of a torsion spring.
Preferably the torsion spring is connected at one end to the seat squab and at the other end to the frame. Most preferably, the torsion spring passes through the seat squab.
The torsion spring preferably comprises a rod with cranked ends, one cranked end of the torsion spring being fixed to the seat squab and the other cranked end being fixed to the seat frame. Preferably one end of the torsion spring is f ixed to the seat squab and the other end is f ixed to the seat frame by means of respective crimped connections.
Preferably the said one end of the torsion spring is connected to a side of the seat squab and/or the said other end of the torsion spring is connected to a side of the seat frame. Preferably one end of the torsion spring is connected to a first bracket which is fixed to the seat squab and/or the other end of the torsion spring is connected to a mounting portion which is fixed to the seat frame.
BRIEF DESCRIPTION OF THE DRAWINGS
For a better understanding of the present invention and to show how the same may be carried into effect reference will now be made, by way of example, to the accompanying drawings, in which:
Figure 1 is an exploded view of the various components making up a tipping seat squab of an auditorium chair; Figure 2 is a partial side view of the torsion spring shown in Figure 1; Figure 3 is an end view of the torsion spring viewed on arrow A in Figure 2; and Figure 4 is an enlarged end view of a mounting element crimped to the torsion spring.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS OF THE
INVENTION Referring to the drawings, Figure 1 shows a seat squab 2 of a tip-seat auditorium chair. The seat squab 2 is pivotally connected to a seat frame (not shown) of the chair about a transverse pivot opening 4 which is formed through the seat squab 2. A pivotal connection between the seat squab 2 and the seat frame is provided by means of a pair of pivot pins 6, 8 f ormed on respective side brackets 10, 12. The brackets 10, 12 are screwed to respective sides of the seat squab 2 by means of screws or bolts 14.
The pivot pins 6, 8 are received in corresponding pivot openings (not shown) formed in the seat frame, so that the seat squab 2 can pivot about the pivot bushes 6, 8 relative to the seat frame.
Buffers 16 are provided on the respective side brackets (10, 12) to limit the motion of the seat squab 2 relative to the seat frame.
A torsion spring 20 passes through grooves 22, 24 f ormed in the pivot pins 6, 8 and through the opening 4 in the seat squab 2. A first end 26 of the torsion spring 20 is bent out at right angles to the longitudinal axis of the torsion spring 20 and is located in the groove 22 in pivot pin 6. The opposite end 28 of the torsion spring 20 is also bent out at right angles to the longitudinal axis of the torsion spring 20 and is crimped into a mounting portion 30.
The mounting portion 30 is fixed to the seat frame by rivetting, welding or any other appropriate means.
When the seat squab 2 is in the raised position the torsion spring 20 is in a relaxed state, or is only slightly loaded to bias the seat squab gently into the raised position. when the seat squab is pulled down into the sitting position it will be appreciated that, because the second end 28 of the torsion spring 20 is fixed relative to the seat frame, and because the first end 26 of the torsion spring 20 is fixed relative to the seat scfuab 2, as the seat squab 2 is pulled down, the torsion spring is twisted or wound up and hence applies a progressively greater restoring force to the seat squab, tending to return it to the raised position.
Claims (10)
1. A tip-seat chair having a seat frame and a seat squab, the seat squab being pivotably connected to the frame and being biased into a tipped up position by means of a torsion spring.
2. A tip-seat chair as claimed in claim 1, in which the torsion spring is connected at one end to the seat squab and at the other end to the seat f rame.
3. A tip-seat chair as claimed in claim 2, in which the torsion spring comprises a rod with cranked ends, one cranked end of the torsion spring being f ixed to the seat squab and the other cranked end being f ixed to the seat frame.
4. A tip-seat chair as claimed in claim 2 or 3, is in which one end of the torsion spring is fixed to the seat squab and the other end is f ixed to the seat frame by means of respective crimped connections.
5. A tip-seat chair as claimed in any one of claims 2 to 4, in which the said one end of the torsion spring is connected to a side of the seat squab.
6. A tip-seat chair as claimed in any one of claims 2 to 5, in which said one end of the torsion spring is connected to a first bracket which is fixed to the Beat squab.
7. A tip-seat chair as claimed in any one of claims 2 to 5, in which the said other end of the torsion spring is connected to a side of the seat frame.
8. A tip-seat chair as claimed in any one of claims 2 to 7, in which the said other end of the torsion spring is connected to a mounting portion which is f ixed to the seat frame.
9. A tip-seat chair as claimed in any one of the preceding claims, in which the torsion spring passes through the seat squab.
10. A tip-seat chair substantially as described herewith with reference to and as shown in, the accompanying drawings.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9923185A GB2354704A (en) | 1999-09-30 | 1999-09-30 | Tip-seat chair |
EP00308624A EP1088500A1 (en) | 1999-09-30 | 2000-09-29 | Tip seat chair |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9923185A GB2354704A (en) | 1999-09-30 | 1999-09-30 | Tip-seat chair |
Publications (2)
Publication Number | Publication Date |
---|---|
GB9923185D0 GB9923185D0 (en) | 1999-12-01 |
GB2354704A true GB2354704A (en) | 2001-04-04 |
Family
ID=10861912
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB9923185A Withdrawn GB2354704A (en) | 1999-09-30 | 1999-09-30 | Tip-seat chair |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1088500A1 (en) |
GB (1) | GB2354704A (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2990166B1 (en) * | 2012-05-04 | 2014-05-23 | Peugeot Citroen Automobiles Sa | FOLDING SADDLE SEAT UNDER CONTROL OF A TORSION STRAINED RETRIEVAL ROD |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3690726A (en) * | 1970-12-21 | 1972-09-12 | American Seating Co | Three-quarter fold chair |
FR2237411A5 (en) * | 1973-07-13 | 1975-02-07 | Stratinor | Automatic tipping device for theatre seat - coil spring working in torsion between shaft and sleeve pivots seat up |
US5393120A (en) * | 1992-10-13 | 1995-02-28 | Krueger International, Inc. | Auditorium seating system |
GB2303542A (en) * | 1995-07-21 | 1997-02-26 | Restall Bros Ltd | Folding seat |
JPH0956522A (en) * | 1995-08-28 | 1997-03-04 | Kyoei Kogyo Kk | Automatic erecting device for seat in seat-erecting chair |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2705526A (en) * | 1948-08-30 | 1955-04-05 | American Seating Co | Chair with self-folding seat |
US3567281A (en) * | 1969-04-28 | 1971-03-02 | American Seating Co | Lounger chair |
-
1999
- 1999-09-30 GB GB9923185A patent/GB2354704A/en not_active Withdrawn
-
2000
- 2000-09-29 EP EP00308624A patent/EP1088500A1/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3690726A (en) * | 1970-12-21 | 1972-09-12 | American Seating Co | Three-quarter fold chair |
FR2237411A5 (en) * | 1973-07-13 | 1975-02-07 | Stratinor | Automatic tipping device for theatre seat - coil spring working in torsion between shaft and sleeve pivots seat up |
US5393120A (en) * | 1992-10-13 | 1995-02-28 | Krueger International, Inc. | Auditorium seating system |
GB2303542A (en) * | 1995-07-21 | 1997-02-26 | Restall Bros Ltd | Folding seat |
JPH0956522A (en) * | 1995-08-28 | 1997-03-04 | Kyoei Kogyo Kk | Automatic erecting device for seat in seat-erecting chair |
Non-Patent Citations (2)
Title |
---|
WPI Abstract. Acc. No. 1993-384822 & SU1777805 * |
WPI Abstract. Acc. No. 1997-206763 & JP9-056522 * |
Also Published As
Publication number | Publication date |
---|---|
EP1088500A1 (en) | 2001-04-04 |
GB9923185D0 (en) | 1999-12-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |