Pressurized roller means in a fluid pressure device

Claim 2

Pressurized roller means in a fluid pressure device having first and second pressure containing means, said first containing means surrounding said second containing means and defining therewith fluid chamber means for containing pressurized fluid therein, said containing means being mounted for relative movement, one of said containing means having at least an open pocket and the other of said containing means having at least a contactable portion, said open pocket having a major closed side and a minor open side in communication with said fluid chamber means, said major closed side having a dimension in generally a circumferential direction greater than that of said minor open side, substantially cylindrical roller means in said pocket, said roller means having a minor portion extending through said minor open side and disposed for contact with said contactable portion, said major closed side of said pocket having opposed terminal wall means and intermediate wall means therebetween, said intermediate wall means and said roller means defining a fluid clearance space therebetween, said roller means in said pocket having opposed confronting wall means respectively confronting said opposed terminal wall means and being respectively contactable therewith, duct means through which pressurized fluid may flow into said clearance space, said duct means leading to said clearance space and defining a fluid entrance therewith at a place circumferentially intermediate said opposed terminal wall means, said roller means under influence of pressurized fluid being urged to seek contact with both said opposed terminal wall means, said pressurized fluid in said clearance space urging said roller means to seek contact with said contactable portion, and fluid passage means communicating with said fluid chamber means for flow of fluid into and out of said fluid chamber means.

Claim 3

The structure of claim 1, wherein said containing means are mounted for relative rotatIonal movement and wherein one of said containing means is also mounted for orbital movement relative to the other of said containing means.

Claim 4

The structure of claim 1, wherein said opposed terminal wall means are spreadable relative to each other in generally a circumferential direction upon being engaged by said roller means under influence of said pressurized fluid in said clearance space.

Claim 5

The structure of claim 1, wherein said pocket comprises fragmental cylindrical wall means.

Claim 6

The structure of claim 1, wherein said pocket comprises fragmental noncylindrical wall means.

Claim 7

Pressurized roller means in a fluid pressure device including a stator-rotor mechanism having stator means and rotor means, said stator means surrounding said rotor means and defining therewith fluid chamber means for containing pressurized fluid therein, said stator and rotor means being mounted for relative rotational movement, one of said stator and rotor means being mounted for orbital movement relative to the other, said stator means having (n ) number of open pockets, said rotor means having (n-1 ) number of contactable portions, said open pockets respectively having a major closed side and a minor open side in communication with said fluid chamber means, said major closed side having a dimension in generally a circumferential direction greater than that of said minor open side, substantially cylindrical roller means in each of said pockets, said roller means respectively having a minor portion extending through said minor open side and disposed for contact with said contactable portions upon relative movement between said stator and rotor means, said major closed sides of said pockets respectively having opposed terminal wall means and intermediate wall means therebetween, said intermediate wall means of each pocket and a roller means mounted therein defining a fluid clearance space therebetween, said roller means in each said pockets having opposed confronting wall means respectively confronting said opposed terminal wall means in each said pockets and being respectively contactable therewith, duct means through which pressurized fluid may flow into said clearance spaces, said duct means leading respectively to said clearance spaces and respectively defining a fluid entrance therewith at a place circumferentially intermediate said opposed terminal wall means, said roller means in each said pockets under influence of pressurized fluid being urged to seek contact with both said opposed terminal wall means in each said pockets, said pressurized fluid in said clearance spaces urging said roller means to seek contact with said contactable portions, and fluid passage means communicating with said fluid chamber means for flow of fluid into and out of said fluid chamber means.

Claim 8

Pressurized roller means in a fluid pressure device including a stator-rotor mechanism having stator means and rotor means, said stator means surrounding said rotor means and defining therewith fluid chamber means for containing pressurized fluid therein, said stator and rotor means being mounted for relative rotational movement, one of said stator and rotor means being mounted for orbital movement relative to the other, said stator means having (n ) number of open pockets, said rotor means having (n-1 ) number of contactable portions, said open pockets respectively having a major closed side and a minor open side in communication with said fluid chamber means, said major closed side having a dimension in generally a circumferential direction greater than that of said minor open side, substantially cylindrical roller means in each of said pockets, said roller means respectively having a minor portion extending through said minor open side and disposed for contact with said contactable portions upon relative movement between said stator and rotor means, said major closed sides of said pockets respectively having opposed terminal wall means and intermediate wall means therebetween, said intermediate wall means of each pocket and a roller means mounted therein defining a fluid clearance space therebetween, said roller means in each said pockets having opposed confronting wall means respectively confronting said opposed terminal wall means in each said pockets and being respectively contactable therewith, duct means through which pressurized fluid may flow into said clearance spaces, said duct means leading respectively to said clearance spaces and respectively defining a fluid entrance therewith at a place circumferentially intermediate said opposed terminal wall means, said roller means in each said pockets under influence of pressurized fluid being urged to seek contact with both said opposed terminal wall means in each said pockets, said pressurized fluid in said clearance spaces urging said roller means to seek contact with said contactable portions, and fluid passage means communicating with said fluid chamber means for flow of fluid into and out of said fluid chamber means.

Claim 9

The structure of claim 6, wherein said opposed terminal wall means are yieldable relative to each other in generally a circumferential direction under force of roller means therebetween. 8, . The structure of claim 6, having first and second opposed side member means between which said stator and rotor means are mounted, one of said stator and rotor means and one of said opposed side member means jointly defining said fluid duct means.

Claim 10

The structure of claim 6, having first and second opposed side member means between which said stator and rotor means are mounted, said stator means having an annular sidewall, one of said opposed side member means having an annular groove with opposed edges registering against said annular sidewall, said annular groove and said annular sidewall jointly defining said fluid duct means.

Claim 11

The structure of claim 1, having means to vary the pressure of said pressurized fluid in said clearance space.

Claim 12

The structure of claim 6, having means to vary the pressure of said pressurized fluid in said clearance spaces.

Claim 13

The structure of claim 6, having means whereby pressurized fluid delivered to said clearance space has a pressure subsTantially the same as that in said fluid chamber means.

Claim 14

The structure of claim 6, having means whereby pressurized fluid delivered to said clearance space has a pressure higher than that in said fluid chamber means.

Claim 15

The structure of claim 6, having means whereby pressurized fluid delivered to said clearance space has a pressure lower than that in said fluid chamber means.

Claim 16

The structure of claim 6, wherein said pockets respectively comprise fragmental cylindrical wall means.

Claim 17

The structure of claim 6, wherein said pockets respectively comprise fragmental noncylindrical wall means.

Claim 18

The structure of claim 6, wherein said stator means has (n ) number of bifurcated body portions disposed respectively between adjacent roller means, said bifurcated body portions respectively comprising yieldable branches, whereby said opposed terminal wall means are yieldable relative to each other in generally a circumferential direction under force of roller means therebetween.