Seat, particularly for automotive vehicles

• US 3,874,626 A
• Filed: 07/09/1973
• Issued: 04/01/1975
• Est. Priority Date: 07/08/1972
• Status: Expired due to Term

• Current Assignee: Willibald Grammer
• Original Assignee: Jurgen Sroka, Karl-Ulrich Gross, Kurt Biesen
• Inventors: Sroka, Jurgen, Biesen, Kurt, Gross, Karl-Ulrich
• Primary Examiner(s): Parsons, Jr., Marion
• Application Number:
  US05/377,725
• Time in Patent Office: 631 Days
• Field of Search: 248/399,400,401,402,403,421,422,424,429
• US Class Current: 248/562
• CPC Class Codes: B60N 2/14 rotatable, e.g. to permit easy access B60N2/10 , B60N2/2869 take precedence
• CPC Class Codes: B60N 2/143 taking a position opposite to the original one
• CPC Class Codes: B60N 2/146 characterised by the locking device
• CPC Class Codes: B60N 2/502 attached to the base of the seat B60N2/504 takes precedence
• CPC Class Codes: B60N 2/505 Adjustable suspension including height adjustment
• CPC Class Codes: B60N 2/508 Scissors-like structure
• CPC Class Codes: B60N 2/544 Compression or tension springs B60N2/542 takes precedence

Abstract

A seat, particularly for automotive vehicles, which comprises a seat-surface support and a seat base including links. The seatsurface support is spring-biased in the vertical direction and is guided by the links of the seat base. A force-storage compression spring is disposed below the seat-surface support. An abutment means is associated with one end of the force-storage compression spring for adjustment of the initial spring tension by displacement of the height of the abutment means. A threaded spindle supports the abutment means. A switch ratchet mechanism actuates the threaded spindle, and the latter extends into the inside of the compression spring.

Claims

1. A seat, particularly for automotive vehicles, comprising a seat-surface support, a seat base inclduing links, said seat-surface support being spring-biased in vertical direction and guided by said links of said seat base, a force-storage compression spring disposed below said seatsurface support, an abutment means associated with one end of said force-storage compression spring for adjustment of the initial spring tension by displacement of the height of said abutment means, a threaded spindle supporting said abutment means, a switch ratchet mechanism actuating said threaded spindle, and the latter extending into the inside of said compression spring, and said threaded spindle is provided with a gear, the latter being disposed at the bottom of said seat-surface support, a transmission gear including a shaft, said threaded spindle gear engages with said transmission gear and said shaft includes a switch ratchet mechanism having a ratchet wheel, the latter includes an operating swing lever, which extends beyond the front edge of said seat surface support.

2. The seat, as set forth in claim 1, wherein said compression spring is conical and has one end of smaller cross-section, said threaded spindle protrudes from the bottom of said seat surface support and is supported thereon, as well as enters into said end of smaller cross-section of said compression spring.

3. The seat, as set forth in claim 1, wherein said switch ratchet mechanism has an operating handle, which simultaneously serves for the switching of the active direction of locking.

4. The seat, as set forth in claim 3, which includes a locking bolt, said locking bolt is axially displaceable against spring action and turnable in its displaced position, as well as extends coaxially in said operating swing lever of said switch ratchet mechanism, and the end of said locking bolt forming a tooth which engages said ratchet wheel.

5. The seat, as set forth in claim 3, which includes end stops for said operating swing lever, a slide bow extends up to said end stops, said slide bow is bent corresponding to the radius of swing of said operating swing lever, and a slide piece extends over said operating lever.

6. The seat, as set forth in claim 1, which includes a switch locking mechanism comprising two facing locking flanks, a switch handle, said locking flanks being capable of being brought into engagement with respect to said adjusting-device drive gear.

7. The seat, as set forth in claim 6, wherein said swing lever comprises an adjusting-device operating lever, the latter being supported on the other side of the axis of said adjusting-device drive gear, an extension seated on the shaft of said drive gear and bearing a switch handle displaceable in a transverse slot and lying in front of the end surface of said extension and brought alternately one of opposite sides of an axial extension of a swing-lever journal pin and the axis of said adjusting-device drive gear.

8. The seat, as set forth in claim 7, wherein said extension is disposed below said swing lever, said switch handle is provided below said swing lever with an abutment lying flat in front of its end surface.

9. The seat, as set forth in claim 6, wherein said swing lever comprises a rocker-shaped pawl supported on an adjusting-device operating lEver and spring urged in the direction of engagement, said rocker-shaped pawl having terminal locking teeth and capable of being brought by a switch lever into position of tooth engagement with respect to said adjusting device drive gear.

10. The seat, as set forth in claim 8, wherein said pawl is adjustable by means of a slide piece serving as switch handle, and said switch handle is slot guided in said handle of said adjusting-device operating lever.

11. The seat, as set forth in claim 8, wherein said pawl has associated therewith a neutral central position in which the pawl tension spring is in the dead center line with respect to said pawl pivot pin.

12. An adjustable seat comprising:

a seat surface support;

a seat base disposed below said support;

a pair of articulated links interconnecting said base and said support for constraining said support to vertical movement relative to said base;

a conical compression spring having a large end seated upon said base and a small end turned toward said support;

a threaded spindle journaled on said support and extending axially downwardly into said spring through said small end thereof;

a spring seat threaded onto said spindle and bearing against said small end of said spring;

a first gear resting against the underside of said support and connected to said spindle;

a second gear journaled at the underside of said support and meshing with said first gear for driving same to rotate said spindle; and

a manually reversible ratchet mechanism operatively connected to said second gear for driving same.