Disk spring hydraulic clutch/brake

A selectively engageable friction mechanism comprising a shaft and a housing, said shaft being selectably rotatable in respect to said housing;

• a multiplicity of friction disks, said friction disks being non-rotatably connected to said shaft, said friction disks having an engagement surface, said engagement surface having a single cross section;
• a multiplicity of reaction disks, said reaction disks being non-rotatably connected to said housing, said friction disks being interleaved with said reaction disks;
• a piston, said piston being located in a cavity, said cavity being located in said housing adjacent to one of said friction or said reaction disks, said piston having actuated and non-actuated positions relative to said one of said disks;
• a bias assembly, said bias assembly engaging both said piston and said housing and including a single spring, said bias assembly biasing said piston into either of said actuated or non-actuated positions;
• and
• a pressurization means, said pressurization means moving said piston into the other of said actuated or non-actuated positions.

A selectively engageable friction mechanism comprising a shaft and a housing, said shaft being selectably rotatable in respect to said housing;

• a multiplicity of friction disks, said friction disks being non-rotatably connected to said shaft, said friction disks being composed of an anodized metal and having an engagement surface, said engagement surface having a single cross section;
• a multiplicity of reaction disks, said reaction disks being non-rotatably connected to said housing, and said friction disks being interleaved with said reaction disks;
• a piston, said piston being located in a cavity, said cavity being located in said housing adjacent to one of said friction or said reaction disks, said piston having actuated and non-actuated positions relative to said one of said disks;
• at least two seals, said seals being located in said piston and contacting said housing so as to provide at least one pressurizable chamber within said cavity;
• a means of selectably pressurizing said at least one chamber said means allowing movement of said piston into either of said actuated or non-actuated positions;
• a bias assembly, said bias assembly engaging both said piston and said housing and including a single spring;
• said spring having an inner edge and an outer edge, said inner edge being radially displaced from said outer edge, said inner edge contacting either of said piston or said housing, and said outer edge contacting the other of said piston or said housing;
• and
• said bias assembly biasing said piston into the other of said actuated or non-actuated positions.

A selectively engageable friction mechanism comprising a shaft and a housing, said shaft being selectably rotatable in respect to said housing;

• a multiplicity of friction disks, said friction disks being non-rotatably connected to said shaft, said friction disks being composed of an anodized metal and having an engagement surface, said engagement surface having a single cross section;
• a multiplicity of reaction disks, said reaction disks being non-rotatably connected to said housing, there being an equal number of said friction disks and said reaction disks, said friction disks being interleaved with said reaction disks;
• a piston, said piston being located in a cavity, said cavity being located in said housing adjacent to said reaction disks, said piston having actuated and non-actuated positions relative to said reaction disks;
• three seals, said seals being located in said piston and contacting said housing so as to provide two pressurizable chambers within said cavity;
• a means of selectably pressurizing at least one of said chambers, the pressurization of either of said chambers allowing movement of said piston into either of said actuated or non-actuated positions;
• a bias assembly, said bias assembly engaging both said piston and said housing and including a single spring;
• said spring having an inner edge and an outer edge, said inner edge being radially displaced from said outer edge, said inner edge contacting either of said piston or said housing, and said outer edge contacting the other of said piston or said housing;
• at least one washer, said washer being located between said spring and said housing;
• and
• said bias assembly biasing said piston into the other of said actuated or non-actuated positions.