Rotation responsive fluid pressure actuator devices

Claim 2

A rotation responsive fluid pressure actuator comprising a casing forming a cylindrical chamber, a piston coaxially rotatable and axially displaceable relative to the latter and defining a passage therethrough having opposite ends communicating with the axially opposite sides respectively of the piston, impeller means attached to said piston in communication with said passage, rotatable with said piston, and producing a variable pressure differential against said axially opposite sides upon rotation of said piston, input drive means connected to said piston to transmit rotation thereto, and an actuating device connected to said piston and axially displaceable therewith in response to said pressure differential for corresponding output action by said actuating device.

Claim 3

A rotation responsive fluid pressure actuator as defined in claim 1, wherein said piston includes surfaces radially extending therein forming said passages and constituting said impeller means.

Claim 4

An actuator as defined in claim 2, wherein said piston includes apertures radially extending therethrough in communication with said axially opposite sides thereof, forming said passages, and having their inner face forming said radially extending surfaces.

Claim 5

An actuator as defined in claim 3, wherein said piston includes a pair of axially spaced-apart walls, a fluid inlet, and a fluid outlet respectively, said fluid inlet is spaced radially inwardly of said fluid outlet relative to the axis of said piston, said passage extends between said axially spaced-apart walls and communicates said fluid inlet with said fluid outlet, and said impeller includes impeller blades secured between said walls and arranged for rotation therewith and centrifugal impelling of fluid between said walls from said fluid inlet to said fluid outlet.

Claim 6

An actuator as defined in claim 4, wherein said wall forming said fluid outlet includes a control ring adjustably mounted and arranged for adjustable constriction of said passage of said piston.

Claim 7

An actuator as defined in claim 5, wherein said wall forming said fluid outlet is formed with screw threads extending axially and coaxially relative to said axis, said ring threadably engages said screw theads and axially projects into said passage of said piston toward said wall forming said fluid inlet, thereby allowing said adjustable constriction upon screwing of said ring.

Claim 8

An actuator as defined in claim 1, wherein said input drive means includes an input shaft rotatably axially engaging in said cylindrical chamber and projecting outwardly from said casing, and said piston and said actuating device are splined onto said input shaft for axial sliding thereon.

Claim 9

An actuator as defined in claim 7, further including a spring biasing said actuating device and said piston toward a rest position.

Claim 10

An actuator as defined in claim 8, wherein said input shaft includes a smaller diameter portion and a larger diameter portion, said actuating device includes a sleeve splined onto said larger diameter portion and projecting along said smaller diameter portion, and said spring is coiled around the latter and operatively engages between said larger diameter portion and said sleeve, causing said actuating device to be biased toward the rest position.

Claim 11

An actuator as defined in claim 9, wherein said actuating device includes an abutment ring fixed inside said sleeve for axial displacement therewith in circumscribing engagement around said smaller diameter portion, an axial abutment member is secured to said smaller diameter portion in fixed axial spacing from said larger diameter portion, and said spring is confined intermediate said larger diameter portion and said abutment ring inwardly biasing said sleeve relative to said casing.

Claim 12

An actuator as defined in claim 9, further including a pair of conical pulley flanges, said input shaft defines an outer portion projecting outwardly of said casing, said sleeve includes an outer portion projecting outwardly of said casing coaxially around and short of said outer input shaft portion, one of said conical pulley flanges is rotatably and axially restrained onto said outer input shaft portion for rotation with the latter and the other of said conical pulley flanges is rotatably and axially restrained onto said outer sleeve portion for axial displacement therewith toward and away from said one conical pulley flange.

Claim 13

An actuator as defined in claim 1, wherein said casing has a flow return passage extending therethrough and having opposite ends communicating with said chamber on said axially opposite sides respectively of said piston, a valve is inserted into said return passage and a control member is connected to said valve and arranged for selective setting of the latter.

Claim 14

An actuator as defined in claim 1, further including said casing forming a flow return passage extending therethrough and having opposite ends communicating with said chamber on said axially opposite sides respectively of said piston, said casing forming an exteriorly opening conduit peripherally communicating with said flow return passage, a removable cover tightly closing said conduit, a baffle plate inwardly positioned relative to said removable cover and in closing engagement in said conduit outwardly confining said return passage, and spring means biasing said baffle plate into said closing engagement.

Claim 15

A rotation responsive fluid pressure actuator as defined in claim 11, said piston includes a pair of axially spaced-apart walls forming a fluid inlet and a fluid outlet respectively, said fluid inlet is spaced radially inwardly of said fluid outlet relative to the axis of said piston, said passage extends between said axially spaced-apart walls and communicates said fluid inlet with said fluid outlet, said impeller includes impeller blades secured between said walls and arranged for rotation therewith and centrifugal impelling of fluid between said walls from said fluid inlet to said fluid outlet, said wall forming said fluid outlet is formed with screw threads extending axially and coaxially relative to said axis, a control ring threadably engages said screw thread and axially pRojects into said passage of said piston toward said wall forming said fluid inlet and forms an adjustable constriction in said passage, said casing forms a flow return passage extending therethrough and having opposite ends communicating with said chamber on said axially opposite sides respectively of said pistion, said casing forms an exteriorly opening conduit peripherally communicating with said flow return passage, a removable cover tightly closes said conduit, a baffle plate is inwardly positioned relative to said removable cover in closing engagement in said conduit outwardly confining said return passage, a spring engages between said cover and said baffle plate and biases the latter into said closing engagement, a valve is inserted in said return passage and has a stem portion projecting outwardly from said casing, and a lever is connected to said stem portion to actuate said valve.