ADJUSTABLE SEAT SUPPORT

• US 3,633,864 A
• Filed: 01/19/1970
• Issued: 01/11/1972
• Est. Priority Date: 01/19/1970
• Status: Expired due to Term

• Current Assignee: Herscheal W. Miller
• Original Assignee: Herscheal W. Miller
• Inventors: Miller, Herscheal W.
• Primary Examiner(s): Schultz, William H.
• Application Number:
  US05/003,715
• Time in Patent Office: 722 Days
• Field of Search: 248/178,399,419,421,424
• US Class Current: 248/419
• 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 2/507 Parallelogram-like structure
• CPC Class Codes: B60N 2/544 Compression or tension springs B60N2/542 takes precedence

Abstract

A seat support for mounting a seat to a vehicle, the support adapted for independent and selective adjustments for regulating the height, fore-and-aft position and suspension of the seat. The support includes a base secured to the vehicle, a first adjusting unit pivotally connected to the base and operable to regulate fore-and-aft positioning of the seat relative to the base, a suspension unit pivotally connected to the first adjusting unit for cushioning the seat, a second adjusting unit pivotally connected to the suspension unit and operable to regulate vertical positioning of the seat relative to the base, and a mounting plate pivotally connected to the second adjusting unit for attaching a seat thereto.

Claims

1. An adjustable seat support comprising:

an adjustable base assembly, a pair of vertical supporting plates pivotally connected to extend upwardly from said base assembly, and a horizontal seat-mounting plate pivotally connected to the upper edges of said vertical supporting plates, said adjustable base assembly comprising a baseplate, an upper connecting member, and a plurality of first bars pivotally connected to the sides of said baseplate and to the sides of said connecting member to form first parallel-bar linkages arranged to permit forward and rearward movement of said upper connecting member, an extensiblE adjustable member pivotally connected in a forward diagonal direction to said first parallel-bar linkages for adjusting the forward position of said upper connecting member, a plurality of second bars for pivotally connecting each of said vertical plates to said upper connecting member of said adjustable base assembly, said second bars, said vertical plates and said connecting member forming second parallel-bar linkages for permitting vertical movement of said vertical plates, a shock-absorbing mechanism connected to said second parallelbar linkages to provide restrained cushioned vertical movement of said vertical plates, a plurality of third bars for pivotally connecting said seat mounting plate to the upper edges of said vertical supporting plates, said third bars, said mounting plate and said supporting plates forming third parallel-bar linkages, and means for rotating said third bars in unison to adjust the height of said seat mounting plate.

2. An adjustable seat support as claimed in claim 12 wherein said extensible adjusting member includes a bolt pivotally connected at one end to said base and a rotatable housing adapted to receive said bolt, a crosspiece connected across the front edges of said sides of said connecting member, said housing being rotatably secured to said crosspiece, said housing rotatable in one direction to move said pivotally supported seat-mounting plate in a forward direction and rotatable in the opposite direction to move said mounting plate in a rearwardly direction.

3. An adjustable seat support as claimed in claim 12 wherein each of certain oppositely mounted ones of said third bars have an additional pivotal mounting point and said means for rotating said third bars include a transverse pivot rod interconnecting said additional pivotal mounting points of a pair of oppositely positioned ones of said bars, one end of said bolt being pivotally connected to said pivot rod, a bracket attached to the front portion of said seat-mounting plate, a housing rotatably mounted to said bracket and engaging the other end of said bolt, and said housing being rotatable to rotate said third bars for adjusting the height of said seat-mounting plate.

4. An adjustable seat support as claimed in claim 12 wherein said shock-absorbing mechanism includes a coil spring, a cross member connected between said vertical plates, said coil spring being mounted substantially vertically between said cross member and said upper connecting member of said base assembly, a tension bolt extending axially through said spring, and said bolt including a manually operable member to provide continuous adjustment of tension of said spring.