US 8,241,165 B2Granted

Seat lifting assembly

AssigneeHema Engineering Industries Limited

InventorsPrasad Nadgouda, Vikram Nanagiri, Ashok Ramteke

Life of this patent

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Abstract

The problem to be solved is to provide a seat lifting assembly where lesser angular movement of the lifting means provide larger increase or decrease in the height of the seat and the problem is solved by providing a seat lifting assembly having a lifting means, an assembly of gears, arrangement of shafts and link which provides higher movement to seat with respect to smaller angular movement of lifting means.

Claims10

Dependent claims

A seat lifting assembly comprising:

a lifting means (1) at one end of the seat lifting assembly;
an arrangement of shafts along a length of the seat lifting assembly, said arrangement comprising:
an output shaft (5), and
a cam shaft (14) coupled with said output shaft (5);
an assembly of gears supported by said arrangement of shafts for transmitting motion from said lifting means (1), said assembly of gears comprising:
a first gear (6) provided with a plurality of teeth (62) on its periphery;
a second gear (13) placed next to said first gear (6), said second gear provided with a plurality of teeth (132) embossed concentrically over the second gear;
a third gear (15) placed next to said second gear (13) being a stepped gear, said third gear comprising a base and a raised step and having:
a plurality of teeth (152) provided on a periphery of the base of said third gear for engaging with said teeth (132) of said second gear (13), and
a plurality of teeth (153) provided on a periphery of the raised step;
a fourth gear (16) placed next to the third gear (15) being a gear having an outer brim and a stepped inner portion with a central hole (161), said fourth gear comprising:
a plurality of teeth (162) on the inner periphery of the brim part for engaging with said teeth (153) of said third gear (15);
a link (17) placed next to said fourth gear (16) for transmitting motion from the assembly of gears to a seat;
wherein, when said lifting means (1) is pushed or pulled, the first gear (6) rotates, which in turn provides rotary motion to the arrangement of shafts, thereby eccentrically rotating the third gear (15) such that said teeth (152) of the third gear (15) engage with said teeth (132) of the second gear (13) and said teeth (153) of the third gear (15) engage with said teeth (162) of the fourth gear (16) and provides a controlled motion to the fourth gear (16), from where the motion is transferred to the link (17), thus, lowering or raising the height of the seat.

11 more elements

Dependencies are inferred from the claim text.

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Abstract

A seat lifting assembly comprising:

a lifting means (1) at one end of the seat lifting assembly;
an arrangement of shafts along a length of the seat lifting assembly, said arrangement comprising:
an output shaft (5), and
a cam shaft (14) coupled with said output shaft (5);
an assembly of gears supported by said arrangement of shafts for transmitting motion from said lifting means (1), said assembly of gears comprising:
a first gear (6) provided with a plurality of teeth (62) on its periphery;
a second gear (13) placed next to said first gear (6), said second gear provided with a plurality of teeth (132) embossed concentrically over the second gear;
a third gear (15) placed next to said second gear (13) being a stepped gear, said third gear comprising a base and a raised step and having:
a plurality of teeth (152) provided on a periphery of the base of said third gear for engaging with said teeth (132) of said second gear (13), and
a plurality of teeth (153) provided on a periphery of the raised step;
a fourth gear (16) placed next to the third gear (15) being a gear having an outer brim and a stepped inner portion with a central hole (161), said fourth gear comprising:
a plurality of teeth (162) on the inner periphery of the brim part for engaging with said teeth (153) of said third gear (15);
a link (17) placed next to said fourth gear (16) for transmitting motion from the assembly of gears to a seat;
wherein, when said lifting means (1) is pushed or pulled, the first gear (6) rotates, which in turn provides rotary motion to the arrangement of shafts, thereby eccentrically rotating the third gear (15) such that said teeth (152) of the third gear (15) engage with said teeth (132) of the second gear (13) and said teeth (153) of the third gear (15) engage with said teeth (162) of the fourth gear (16) and provides a controlled motion to the fourth gear (16), from where the motion is transferred to the link (17), thus, lowering or raising the height of the seat.

11 more elements