Adjustable suspension system

In a snowmobile having one or more skis, having a chassis, and having one or more slide rails, a fore and aft weight shifting adjusting mechanism interconnected between the chassis and the one or more slide rails including:

• a) an adjustable shock absorbing mechanism comprising:
• 1) a tubular body having a base end and a distal end, said tubular body closed at said base end by a base end cap and closed at said distal end by a rod end cap, including
• aa) said base end cap pivotally connected either to the chassis or to the one or more slide rails;
• bb) a base aperture near the base end of the tubular body for the transfer of hydraulic fluid into and out of the tubular body;
• cc) said rod end cap including an aperture therethrough;
• and
• dd) a porthole near the distal end of the tubular body for the transfer of hydraulic fluid out of and into the tubular body;
• 2) a first piston within said tubular body, said first piston defining an aperture for the passage of hydraulic fluid therethrough during shock absorbing movement of said first piston;
• 3) a first hydraulic fluid chamber defined by said tubular body, a movable sealing piston within the tubular body, and said base end cap;
• 4) a longitudinal rod passing through the aperture in said rod end cap and connected to said first piston, and a distal end of said longitudinal rod pivotally connected either to the one or more slide rails or to the chassis, wherein if said base end cap of the tubular body is connected to the one or more slide rails then said distal end of said longitudinal rod is connected to the chassis, or vice versa;
• 5) said movable sealing piston defining an aperture with the longitudinal rod passing therethrough, and said movable sealing piston located between said first piston and said rod end cap;
• and
• 6) a second hydraulic fluid chamber defined by said tubular body, said movable sealing piston, and said rod end cap;
• b) a suspension adjustor connected to said porthole of the tubular body to allow controlled transfer of hydraulic fluid into and out of said second hydraulic fluid chamber to accomplish longitudinal displacement of the movable sealing piston;
• and
• c) a reservoir connected to the base aperture to allow transfer of hydraulic fluid out of and into said first hydraulic fluid chamber;
• wherein when hydraulic fluid is transferred from said suspension adjustor through said porthole into said second hydraulic fluid chamber, said movable sealing piston is moved in a direction away from said rod end cap and hydraulic fluid is transferred from said first hydraulic chamber into the reservoir thus moving said movable sealing piston and said first piston toward said base end cap and shortening the length of said adjustable shock absorbing mechanism between said distal end and said base end and shifting the weight of the snowmobile forward toward the one or more skis, and
• wherein when hydraulic fluid is allowed by said suspension adjustor to be transferred from said second hydraulic fluid chamber through the porthole into the suspension adjustor, said movable sealing piston is moved in a direction toward the rod end cap and hydraulic fluid is transferred from the reservoir thus moving said first piston and said movable sealing piston toward said rod end cap and extending the length of said adjustable shock absorbing mechanism between said distal end and said base end and shifting the weight of the snowmobile backward away from the one or more skis.

In a snowmobile having one or more skis or ski suspension linkages, and having a chassis, a suspension adjusting mechanism interconnected between the chassis and the one or more skis including:

• a) an adjustable shock absorbing mechanism comprising:
• 1) a tubular body having a base end and a distal end, said tubular body closed at said base end by a base end cap and closed at said distal end by a rod end cap, including
• aa) said base end cap pivotally connected either to the chassis or to the one or more skis or ski suspension linkages;
• bb) a base aperture near the base end of the tubular body for the transfer of hydraulic fluid into and out of the tubular body;
• cc) said rod end cap including an aperture therethrough;
• and
• dd) a porthole near the distal end of the tubular body for the transfer of hydraulic fluid out of and into the tubular body;
• 2) a first piston within said tubular body, said first piston defining an aperture for the passage of hydraulic fluid therethrough during shock absorbing movement of said first piston;
• 3) a first hydraulic fluid chamber defined by said tubular body, a movable sealing piston within the tubular body, and said base end cap;
• 4) a longitudinal rod passing through the aperture in said rod end cap and connected to said first piston, and a distal end of said longitudinal rod pivotally connected either to the one or more skis or ski suspension linkages or to the chassis, wherein if said base end cap of the tubular body is connected to the one or more skis or ski suspension linkages then said distal end of said longitudinal rod is connected to the chassis, or vice versa;
• 5) said movable sealing piston defining an aperture with the longitudinal rod passing therethrough, and said movable sealing piston located between said first piston and said rod end cap;
• and
• 6) a second hydraulic fluid chamber defined by said tubular body, said movable sealing piston, and said rod end cap;
• b) a suspension adjustor connected to said porthole of the tubular body to allow controlled transfer of hydraulic fluid into and out of said second hydraulic fluid chamber to accomplish longitudinal displacement of the movable sealing piston;
• and
• c) a reservoir connected to the base aperture to allow transfer of hydraulic fluid out of and into said first hydraulic fluid chamber;
• wherein when hydraulic fluid is transferred from said suspension adjustor through said porthole into said second hydraulic fluid chamber, said movable sealing piston is moved in a direction away from said rod end cap and hydraulic fluid is transferred from said first hydraulic chamber into the reservoir thus moving said movable sealing piston and said first piston toward said base end cap and shortening the length of said adjustable shock absorbing mechanism between said distal end and said base end and thereby altering the suspension to shift the weight of the snowmobile, and
• wherein when hydraulic fluid is allowed by said suspension adjustor to be transferred from said second hydraulic fluid chamber through the porthole into the suspension adjustor, said movable sealing piston is moved in a direction toward the rod end cap and hydraulic fluid is transferred from the reservoir thus moving said first piston and said movable sealing piston toward said rod end cap and extending the length of said adjustable shock absorbing mechanism between said distal end and said base end and thereby altering the suspension to shift the weight of the snowmobile.

An adjustable shock absorbing mechanism comprising:

• 1) a tubular body having a base end and a distal end, said tubular body closed at said base end by a base end cap and closed at said distal end by a rod end cap, including
• aa) a base aperture near the base end of the tubular body for the transfer of hydraulic fluid into and out of the tubular body;
• bb) said rod end cap including an aperture therethrough;
• and
• cc) a porthole near the distal end of the tubular body for the transfer of hydraulic fluid out of and into the tubular body;
• 2) a first piston within said tubular body, said first piston defining an aperture for the passage of hydraulic fluid therethrough during shock absorbing movement of said first piston;
• 3) a first hydraulic fluid chamber defined by said tubular body, a movable sealing piston within the tubular body, and said base end cap;
• 4) a longitudinal rod passing through the aperture in said rod end cap and connected to said first piston;
• 5) said movable sealing piston defining an aperture with the longitudinal rod passing therethrough, and said movable sealing piston located between said first piston and said rod end cap;
• and
• 6) a second hydraulic fluid chamber defined by said tubular body, said movable sealing piston, and said rod end
• cap;
• 7) a suspension adjustor connected to said porthole of the tubular body to allow controlled transfer of hydraulic fluid into and out of said second hydraulic fluid chamber to accomplish longitudinal displacement of the movable sealing piston;
• and
• 8) a reservoir connected to the base aperture to allow transfer of hydraulic fluid out of and into said first hydraulic fluid chamber;
• wherein when hydraulic fluid is transferred from said suspension adjustor through said porthole into said second hydraulic fluid chamber, said movable sealing piston is moved in a direction away from said rod end cap and hydraulic fluid is transferred from said first hydraulic chamber into the reservoir thus moving said movable sealing piston and said first piston toward said base end cap and shortening the length of said adjustable shock absorbing mechanism between said distal end and said base end;
• and wherein when hydraulic fluid is allowed by said suspension adjustor to be transferred from said second hydraulic fluid chamber through the porthole into the suspension adjustor, said movable sealing piston is moved in a direction toward the rod end cap and hydraulic fluid is transferred from the reservoir thus moving said first piston and said movable sealing piston toward said rod end cap and extending the length of said adjustable shock absorbing mechanism between said distal end and said base end.