Adjustably positionable seat support

Claim 2

An adjustably positionable seat support including, an adapter for supporting engagement with the underside of the seat and having spaced fore and aft elongated guide means, the foremost guide means being declined and the rearmost guide means being inclined, the forward extremities of said fore and aft guide means being in a plane normal to a line projecting from a point therebetween and extending through and beyond the underside of the seat to a metacenter above the seat, and a supportable carrier with fore and aft pivots slideably engageble in said fore and aft guide means and spaced to move to and from the forward extremities of said guide means respectively whereby fore and aft motion of the adapter causes rotation thereof about said metacenter.

Claim 3

The adjustably positionable seat support as set fOrth in claim 1, wherein said fore and aft guide means are slots respectively, and wherein the said pivots are pins rotatably and slideably engageable in the slots.

Claim 4

The adjustably positionable seat support as set forth in claim 1, wherein said fore and aft guide means are arcuate slots curved about said metacenter respectively, and wherein the said pivots are pins rotatably and slideably engageable in the arcuate slots.

Claim 5

The adjustably positionable seat support as set forth in claim 1, wherein said fore and aft guide means are straight slots disposed normal to said metacenter respectively, and wherein the said pivots are pins rotatably and slideably engageable in the slots.

Claim 6

The adjustably positionable seat support as set forth in claim 1, wherein the adapter has opposite side flanges depending from the underside of the seat cushion, wherein said fore and aft guide means comprise complementary pairs of slots in the opposite side flanges respectively, and wherein the said pivots are pins disposed on transverse axes rotatably and slideably engageable in the complementary pairs of slots respectively.

Claim 7

The adjustably positionable seat support as set forth in claim 1, wherein the adapter has opposite side flanges depending from the underside of the seat cushion, wherein said fore and aft guide means comprise complementary pairs of arcuate slots curved about said metacenter and in the opposite side flanges respectively, and wherein the said pivots are pins disposed on transverse axes rotatably and slideably engageable in the complementary pairs of arcuate slots respectively.

Claim 8

The adjustably positionable seat support as set forth in claim 1, wherein the adapter has opposite side flanges depending from the underside of the seat cushion, wherein said fore and aft guide means comprise complementary pairs of straight slots disposed normal to said metacenter and in opposite side flanges respectively, and wherein the said pivots are pins disposed on transverse axes rotatably and slideably engageable in the complementary pairs of slots respectively.

Claim 9

An adjustably positionable and controlled seat support including, an adapter for supporting engagement with the underside of the seat and having spaced fore and aft elongated guide means, the foremost guide means being declined and the rearmost guide means being inclined, the forward extremities of the said fore and aft guide means being in a plane normal to a line projecting from a point therebetween and extending through and beyond the underside of the seat to a metacenter above the seat, a supportable carrier with fore and aft pivots slideably engageable in said fore and aft guide means and spaced to move to and from the forward extremities of said guide means respectively, and control means determining the fore and aft positioning of the adapter relative to the carrier, whereby fore and aft motion of the adapter causes rotation thereof about said metacenter arrested by said control means.

Claim 10

An adjustably positionable and controlled seat support including, an adapter for supporting engagement with the underside of the seat and having spaced fore and aft elongated guide means, the foremost guide means being declined and the rearmost guide means being inclined, the forward extremities of the said fore and aft guide means being in a plane normal to a line projecting from a point therebetween and extending through and beyond the underside of the seat to a metacenter above the seat, a supportable carrier with fore and aft pivots slideably engageable in said fore and aft guide means and spaced to move to and from the forward extremities of said guide means respectively, and control means determining the fore and aft positioning of the adapter relative to the carrier, whereby fore and aft motion of the adapter causes rotation thereof about said metacenter arrested by said control means.

Claim 11

The adjustably positionable and controlled seat support as set forth in claim 8, wherein the control means comprises a manually releasable pin disengageably connecting the adapter and carrier stopping said relative fore and aft motion.

Claim 12

The adjustably positionable and controlled seat support as set forth in claim 8, wherein the control means comprises a manually positionable pin shiftably carried by the carrier and disengageable with the adapter stopping said relative fore and aft motion.

Claim 13

The adjustably positionable and controlled seat support as set forth in claim 8, wherein the control means comprises a manually positionable pin shiftably carried by the carrier and disengageable with a series of stop openings in the adapter stopping relative fore and aft motion.

Claim 14

The adjustably positionable and controlled seat support as set forth in claim 8, wherein said fore and aft guide means are arcuate slots curved about said metacenter respectively, wherein the said pivotal pins are to rotatabLy and slideably engageable in the slots, and wherein the control means comprises a manually positionable pin shiftably carried by the carrier and disengageable with an arcuate series of stops in a line curved about said metacenter stopping said relative fore and aft motion.

Claim 15

The adjustably positionable and controlled seat support as set forth in claim 8, wherein said fore and aft guide means are straight slots disposed normal to said metacenter respectively, and wherein the control means comprises a manually positionable pin shiftably carried by the carrier and engageable with a straight series of stop openings in the adapter stopping said relative fore and aft motion.

Claim 16

The adjustably positionable and controlled seat support as set forth in claim 8, wherein the adapter has opposite side flanges depending from the underside of the seat cushion, wherein said fore and aft guide means comprise complementary pairs of slots in the opposite side flanges respectively, wherein the said pivots are pins disposed on transverse axes rotatably and slideably engageable in the complementary pairs of slots respectively, and wherein the control means comprises a manually positionable pin shiftably carried by the carrier and disengageable with the adapter stopping said fore and aft motion.

Claim 17

A selectively retractible and inclinable seat support including, a columnar supporting base of right cylinder form disposed on a vertical axis, an adapter for supporting engagement with the underside of the seat and having opposite side flanges depending from the underside of the seat and complementary pairs of spaced fore and aft elongated guide means in the opposite side flanges respectively, the foremost guide means being declined and the rearmost guide means being inclined, the forward extremities of said fore and aft guide means being in a plane normal to a line projecting from a point therebetween and extending through and beyond the underside of the seat to a metacenter, a carrier rotatably supported upon the first mentioned base and with fore and aft pivots slideably engageable in said fore and aft guide means and spaced to move to and from the forward extremities of said guide means respectively, and control means determining the positioning of the adapter relative to the carrier and base, whereby fore and aft motion of the adapter causes rotation thereof about the metacenter.

Claim 18

A selectively retractible and inclinable seat support including, a columnar supporting base of right cylinder form disposed on a vertical axis, an adapter for supporting engagement with the underside of the seat and having opposite side flanges depending from the underside of the seat and complementary pairs of spaced fore and aft elongated guide means in the opposite side flanges respectively, the foremost guide means being declined and the rearmost guide means being inclined, the forward extremities of said fore and aft guide means being in a plane normal to a line projecting from a point therebetween and extending through and beyond the underside of the seat to a metacenter, a carrier rotatably supported upon the first mentioned base and with fore and aft pivots slideably engageable in said fore and aft guide means and spaced to move to and from the forward extremities of said guide means respectively, and control means determining the positioning of the adapter relative to the carrier and base, whereby fore and aft motion of the adapter causes rotation thereof about the metacenter.

Claim 19

The selectively rotatable and inclinable seat support as set forth in claim 15, wherein the said fore and aft guide means are straight slots declined and inclined at substantially 30* in each instance, and wherein the said pivots are pins rotatably and slideably engageable in the slots.

Claim 20

The selectively rotatable and inclinable seat support as set forth in claim 15, wherein the said fore and aft guide means are straight slots declined at substantially 34* and inclined at substantially 37* respectively, and wherein the said pivots are pins rotatably and slideably engageable in the slots.

Claim 21

The selectively rotatable and inclinable seat support as set forth in claim 15, wherein the control means is a bolt disengageably projected through at least one stop opening in the adapter and through at least one stop opening in the base.

Claim 22

The selectively rotatable and inclinable seat support as set forth in claim 15, wherein the control means is a bolt disengageably projected through at least one stop opening in the adapter and through at least one aligned stop opening in the base, there being means retracting the bolt from the base stop opening while maintaining bolt engagement through the adapter stop opening.

Claim 23

The selectively rotatable and inclinable seat support as set forth in claim 15, wherein the control means is a bolt disengageably projected through at least one stop opening in the adapter and through at least one aligned stop opening in the base, there being means retracting the bolt from both the base and adapter stop openings.

Claim 24

The seLectively rotatable and inclinable seat support as set forth in claim 15, wherein the control means is a bolt disengageably projected through at least one stop opening in the adapter and through at least one aligned stop opening in the base, there being cam means with a minor incline retracting the bolt from the base stop opening and with a major incline retracting the bolt from both the base and adapter stop openings.

Claim 25

The selectively rotatable and inclinable seat support as set forth in claim 15, wherein the control means is a bolt disengageably projected through at least one stop opening in the adapter and through at least one aligned stop opening in the base, there being a reversely positionable cam means with a minor incline retracting the bolt from the base stop opening and with a major incline retracting the bolt from both the base and adapter stop openings.