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US 4,921,242 AGranted
Exercise apparatus resistance system
AssigneeWeslo, Inc.
InventorScott R. Watterson
Life of this patent
Estimating the term…
Abstract
An exercise machine such as a rowing machine has a resistance system which consists of a fluid cylinder interconnected at one end to the movable block of a block and tackle which is selected to have a desired mechanical advantage to provide the desired resistance to movement of machine operation means such as the handle of the rowing machine. Adjustment structure provides for variable or adjustable resistance to movement of the block and tackle structure.
Claims21
A rowing exercise machine comprising:
- track means for supporting a user;
- support means attached to said track means to support said track means on a support surface;
- seat means slidably adapted to said track means for movement thereon, said seat means being sized to support a sitting user thereon;
- operation means positioned and adapted to said track means for grasping and operation by the user sitting on said seat means to perform rowing type exercises;
- a resistance system adapted to said track means and to said operation means to resist movement of said operation means, said resistance system including:
- resistance means for providing resistance to movement of said operation means, said resistance means having a first end secured to said track means and a second end;
- block and tackle means to operate said resistance means, said block and tackle means having a first block adapted to said second end of said resistance means and a second block operably aligned with and interconnected to said first block by line means to obtain a mechanical advantage, one of said first block and second block having multiple pulleys interconnected by said line means to a pulley of the other of said first block and said second block, said line means being laced about said pulley and said multiple pulleys and having a lead extending alternatively and selectively from said first and second blocks to interconnect to said operation means for movement of said first block by said operation means, and said line means connected at only one end to said operation means.
4 more elements
A resistance system for exercise machines having operation means for operation by the user to perform exercises, said resistance system comprising:
- resistance means mechanically associable to the structure of an exercise machine for providing resistance to movement of the operation means of the exercise machine, said resistance means having a first end securable to said structure and a second end;
- block and tackle means to operate said resistance means, said block and tackle means having a first block adapted to said second end of said resistance means and a second block interconnected to said first block by line means to obtain a mechanical advantage, said line means being formed with a lead extending alternatively and selectively from said first and second blocks for interconnection to said operation means for movement of said first block by said operation means, said first block and said second block being positioned in general axial alignment, and said first block including trolley means to maintain said first block in said general axial alignment during movement of said first block said trolley means including two shoes with said first block thereinbetween and support structure associated with the structure of said exercise machine to support said shoes.
A resistance system for exercise machines having operation means for operation by the user to perform exercises, said resistance system comprising:
- resistance means connected to the structure of an exercise machine to resist movement of the operation means of the exercise machine, said resistance means having a first end securable to said structure and a second end;
- and
- block and tackle means to operate said resistance means, said block and tackle means having a first block adapted to said second end of said resistance means and a second block in general axial alignment with and interconnected to said first block by line means to obtain a mechanical advantage, said first block and second block each having multi-track pulleys, said first block including trolley means to maintain said first block in said general axial alignment during movement of said first block, and said line means being laced about said pulleys and having a lead extending alternatively and selectively from said first and second blocks for interconnection to said operation means for movement of said first block by said operation means.
A resistance system for exercise machines having operation means for operation by the user to perform exercises, said resistance system comprising:
- resistance means connected to the structure of an exercise machine to resist movement of the operation means of the exercise machine, said resistance means having a first end securable to said structure and a second end;
- block and tackle means to operate said resistance means, said block and tackle means having a first block adapted to said second end of said resistance means and a second block operably aligned with and interconnected to said first block by line means to obtain a mechanical advantage, said first block and second block each having at least one pulley interconnected by said line means, and said line means having a lead extending alternatively and selectively from said first and second blocks for interconnection at one end only to said operation means for movement of said first block by said operation means;
- trolley means secured to said first block to maintain said first block in operable alignment with said second block;
- and
- guide means connected to the structure of said exercise machine to guide said trolley means.
2 more elements
Dependencies are inferred from the claim text.