generally stated , non - limitative illustrative embodiments of the present disclosure provide an adjustable seat support and more specifically an adjustable seat support for use with motorcycles , snowmobiles , watercrafts , three and four wheel off - road vehicles , etc ., in order to reduce muscle fatigue that may result from having the same driving position for long periods of time and also optimize the position of the center of mass of the rider which results in completely different road manners . the adjustable seat support may be controlled electronically , pneumatically , hydraulically , mechanically , etc ., so as to accommodate different driving ergonomics or user body configurations . the adjustment can be done at any time , while in motion or stationary . referring to fig1 , there is shown an adjustable seat support 100 in accordance with an illustrative embodiment of the present disclosure . the adjustable seat support 100 is generally composed of a support member 102 adapted to support a seat , a pair of front 104 a and rear 104 b support brackets pivotally connecting the support member 102 to a vehicle frame via pivot members 103 a , 103 b and 14 a , 14 b , respectively , and an actuator link 106 , which pivotally connects the front support brackets 104 a to the vehicle frame via pivot members 105 and 107 , respectively . it is to be understood that although the actuator link 106 is pivotally connected to the front support brackets 104 a through pivot member 105 , which engages pivot receiving structure 16 a , in an alternative embodiment the actuator link 106 may be pivotally connected to the back support brackets 104 b by engaging the pivot member 105 with pivot receiving structure 16 b . in the illustrative embodiment , the front 104 a and rear 104 b support brackets are advantageously disposed with respect to the support member 102 such that they may pass each other during the raising and lowering of the support member 102 , i . e . the spacing between each of the front support brackets 104 a and the spacing between each of the rear support brackets 104 b allow the front 104 a or rear 104 b support brackets to pass between the rear 104 b or front 104 a support brackets . however , the front 104 a and rear 104 b support brackets may be disposed such that they may not pass each other during the raising and lowering of the support member 102 , thus limiting the range of movement of the support member 102 . it is to be understood that although the front 104 a and rear 104 b support brackets are shown in the illustrative embodiment as being parallel , they may be disposed otherwise in an alternative embodiment in order to control and vary the seat angle . referring to fig2 and 3 , there is shown the adjustable seat support 100 attached to a motorcycle 10 in a pull configuration and in a raised ( fig2 ) or lowered ( fig3 ) position . front 14 a and rear 14 a bracket pivot members pivotally connect the front 104 a and rear 104 b support brackets , respectively , to a first position on the frame 12 of the motorcycle 10 while actuator pivot member 107 pivotally connects the actuator link 106 to a second position on the frame 12 of the motorcycle 10 , the first and second positions being spaced apart . the actuator link 106 is further operatively connected to an actuation mechanism 108 forming actuator 109 , for example a linear actuator . it is to be understood that although the following disclosure refers to a motorcycle , same may be applied to other types of vehicles such as snowmobiles , watercrafts , three and four wheel off - road vehicles , etc . the height of the seat 110 , which is attached to the support member 102 , is controlled by activating the actuation mechanism 108 of the actuator 109 , which contracts ( fig2 ) or expands ( fig3 ) the actuator link 106 in order to pivot the front 104 a and rear 104 b support brackets . the actuator 109 may be electronic , pneumatic , hydraulic , mechanical , etc ., in nature and may be controlled by a user using a button , joystick or other user interface . referring to fig4 a to 4c , there is shown the displacement of the adjustable seat support 100 components in a pull configuration , going from a raised position ( fig4 a ) to a lowered position ( fig4 c ). in this configuration , the pivotal movements of the front 104 a and rear 104 b support brackets move the support member 102 from a completely raised position to a completely lowered position as the actuator link 106 expands from a completely retracted position ( fig4 a ) to a completely expanded position ( fig4 c ). it is to be understood that , although not shown in fig4 a to 4c , pivot members 107 , 14 a and 14 b are pivotally connected to the frame 12 of the motorcycle 10 ( see fig2 and 3 ), pivot member 107 being pivotally connected to a position that is higher on the frame 12 then the position of pivot members 14 a and 14 b , and thus each remains in a fixed position . referring to fig5 a to 5c , there is shown the displacement of the adjustable seat support 100 components in a push configuration , going from a raised position ( fig5 a ) to a lowered position ( fig5 b ). in this configuration , the pivotal movements of the front 104 a and rear 104 b support brackets move the support member 102 from a completely raised position to a completely lowered position as the actuator link 106 contracts from a completely expanded position ( fig5 a ) to a completely retracted position ( fig5 c ). it is to be understood that , although not shown in fig5 a to 5c , pivot members 107 , 14 a and 14 b are pivotally connected to the frame 12 of the motorcycle 10 ( see fig2 and 3 ), pivot member 107 being pivotally connected to a position that is lower on the frame 12 then the position of pivot members 14 a and 14 b , and thus each remains in a fixed position . it is to be understood that although the illustrative embodiment of the present disclosure includes a pair of front 104 a and rear 104 b support brackets , their number may vary . furthermore , in another alternative embodiment , the front 104 a and rear 104 b support brackets may be replaced by a single bracket in combination with a mechanism to adjust and maintain the inclination of the support member 102 . referring to fig6 , there is shown an adjustable seat support 200 in accordance with a second illustrative embodiment of the present disclosure . the adjustable seat support 200 is generally composed of a support member 102 adapted to support a seat , a front 204 a and a pair of rear 204 b support brackets pivotally connecting the support member 102 to a vehicle frame via pivot members 203 a , 203 b , 214 a , 216 and base bracket 217 , and an actuator link 106 , which pivotally connects the rear support brackets 204 b to the vehicle frame via pivot members 205 and 107 , respectively . the front support bracket 204 a is pivotally and slidingly engaged to the support member 102 through slider guide 215 a while the rear support brackets 204 b are pivotally and slidingly engaged to the base bracket 217 through slider guide 215 b . pivot member 214 b , combined with slider guides 215 a and 215 b , ensure proper raising and lowering of the support member 102 . referring to fig7 a and 7b , there is shown the displacement of the adjustable seat support 200 components in a push configuration , going from a raised position ( fig7 a ) to a lowered position ( fig7 b ). in this configuration , the pivotal movements of the front 204 a and rear 204 b support brackets move the support member 102 from a completely raised position to a completely lowered position as the actuator link 106 contracts from a completely expanded position ( fig7 a ) to a completely retracted position ( fig7 b ). it is to be understood that , although not shown in fig7 a and 7b , pivot members 107 and base bracket 217 are connected to the frame 12 of the motorcycle 10 , pivot member 107 being pivotally connected to a position which is front wise compared to the position of base bracket 217 . referring to fig8 a and 8b , there is shown the displacement of the adjustable seat support 200 components in a pull configuration , going from a raised position ( fig7 a ) to a lowered position ( fig7 b ). in this configuration , the pivotal movements of the front 204 a and rear 204 b support brackets move the support member 102 from a completely raised position to a completely lowered position as the actuator link 106 expands from a completely retracted position ( fig8 a ) to a completely expanded position ( fig8 b ). it is to be understood that , although not shown in fig8 a and 8b , pivot members 107 and base bracket 217 are connected to the frame 12 of the motorcycle 10 , pivot member 107 being pivotally connected to a position which is rear wise compared to the position of base bracket 217 . referring to fig9 , there is shown an adjustable seat support 300 in accordance with a third illustrative embodiment of the present disclosure . the adjustable seat support 300 is generally composed of a support member 102 adapted to support a seat , a front 304 a and a pair of rear 304 b support brackets pivotally connecting the support member 102 to a vehicle frame via pivot members 303 a ( see fig1 a and 10b ), 303 b and 314 a , 314 b , respectively , and an actuator link 106 , which pivotally connects the rear support brackets 304 b to the vehicle frame via pivot members 305 and 107 , respectively . referring to fig1 a and 10b , there is shown the displacement of the adjustable seat support 200 components in a pull configuration , going from a raised position ( fig1 a ) to a lowered position ( fig1 b ). in this configuration , the pivotal movements of the front 304 a and rear 304 b support brackets move the support member 102 from a completely raised position to a completely lowered position as the actuator link 106 expands from a completely retracted position ( fig1 a ) to a completely expanded position ( fig1 b ). it is to be understood that , although not shown in fig1 a and 10b , pivot members 107 , 314 a and 314 b are pivotally connected to the frame 12 of the motorcycle 10 , pivot member 107 being pivotally connected to a position that is higher on the frame 12 then the position of pivot members 314 a and 314 b , and thus each remains in a fixed position . in another alternative embodiment , the front 104 a , 204 a , 304 a and rear 104 b , 204 b , 304 b support brackets may have different lengths in order to induce a desired inclination to the support member 102 , and thus to the seat 110 . in a further alternative embodiment , the length of the front 104 a , 204 a , 304 a and rear 104 b , 204 b , 304 b support brackets may be dynamically varied , for example using a length adjustment mechanism operatively connected to either or both of the front 104 a , 204 a , 304 a and rear 104 b , 204 b , 304 b support brackets , in order to control the inclination of the support member 102 , and thus of the seat 110 . it is to be understood that the maximum displacement of the support member 102 can be adjusted by the length of the front 104 a , 204 a , 304 a and rear 104 b , 204 b , 304 b , either statically or dynamically , or by the distance between link 105 , 305 and pivots 14 a ( or 14 b ), 314 a , respectively . it is further to be understood that the actuator 109 may be connected to the various support brackets 104 a , 104 b , 204 b , 304 b , with any kind of linkage mechanism in order to change the motion ratio of the actuator link 106 compared to the movement of the support member 102 . although the present disclosure has been described with a certain degree of particularity and by way of illustrative embodiments and examples thereof , it is to be understood that the present disclosure is not limited to the features of the embodiments described and illustrated herein , but includes all variations and modifications within the scope and spirit of the disclosure as hereinafter claimed .