US3813189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low fluid fluid motor
Assignee: Individual
•
Filing: 1972-05-24
•
Granted: 1974-05-28
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Expires: 1992-05-24
Abstract
Abstract A sliding vane rotary fluid motor including a rotor cylinder shiftable laterally of the axis of rotation of the rotor between a first position generally concentric with the rotor axis and a second position eccentrically disposed relative to the rotor axis. Structure is provided for yieldingly biasing the cylinder toward its limit position concentric with the axis of rotation of the rotor and the cylinder defines a sliding partition within the housing of the motor with the partition closing one side of a fluid chamber within the motor housing. Rotor speed responsive fluid delivery structure is provided for ducting fluid under pressure from the intake of the motor into the chamber in response to a reduction in rotor speed to thereby overcome the biasing action acting upon the cylinder and shift the latter from its position concentric with the rotor axis toward its limit position of movement eccentrically disposed relative to the rotor axis.
Inventors
- 👤 L Tompkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:58
CPC Classifications
F; F01; F01C; F01C20/00; F01C20/18; F01C20/22
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
245 words
A fluid motor comprising a hollow housing, a sliding vane equipped rotor journaled in said housing, a cylinder disposed iN said housing for limited shifting therein along a path extending generally diametrically of the cylinder, said rotor being disposed in said cylinder, fluid pressure inlet and outlet means opening into and out of said cylinder on opposite sides thereof, spring means yieldingly biasing said cylinder in one direction along said path, said cylinder and housing including means coacting to define expansion chamber means expandable and contractible in response to reciprocal movement of said cylinder along said path, fluid pressure supply means communicating said fluid pressure inlet with said expansion chamber means and including rotor speed controlled fluid pressure controlling means for controlling the fluid pressure in said expansion chamber means and operative to vary the fluid pressure in said expansion chamber means in response to variance in the speed of rotation of said rotor, said expansion chamber means including a pair of chambers on opposite sides of said cylinder spaced along said path communicated with said inlet means and operable, upon substantially equal fluid pressure being communicated therewith, to substantially equally urge said cylinder in opposite directions along said path, said fluid pressure controlling means including restricted communication between said inlet means and one of said chambers as well as rotor speed controlled variable fluid outlet means for said one chamber, said spring means being operable to yieldingly bias said cylinder toward said other chamber.
Claim 2
Dependent Claim
245 words
A fluid motor comprising a hollow housing, a sliding vane equipped rotor journaled in said housing, a cylinder disposed iN said housing for limited shifting therein along a path extending generally diametrically of the cylinder, said rotor being disposed in said cylinder, fluid pressure inlet and outlet means opening into and out of said cylinder on opposite sides thereof, spring means yieldingly biasing said cylinder in one direction along said path, said cylinder and housing including means coacting to define expansion chamber means expandable and contractible in response to reciprocal movement of said cylinder along said path, fluid pressure supply means communicating said fluid pressure inlet with said expansion chamber means and including rotor speed controlled fluid pressure controlling means for controlling the fluid pressure in said expansion chamber means and operative to vary the fluid pressure in said expansion chamber means in response to variance in the speed of rotation of said rotor, said expansion chamber means including a pair of chambers on opposite sides of said cylinder spaced along said path communicated with said inlet means and operable, upon substantially equal fluid pressure being communicated therewith, to substantially equally urge said cylinder in opposite directions along said path, said fluid pressure controlling means including restricted communication between said inlet means and one of said chambers as well as rotor speed controlled variable fluid outlet means for said one chamber, said spring means being operable to yieldingly bias said cylinder toward said other chamber.
Claim 3
Dependent Claim
38 words
The combination of claim 1 wherein said variable outlet means includes valve means operative to open and close said variable fluid outlet means in response to increases and decreases, respectively, in the speed of rotation of said rotor.
Claim 4
Dependent Claim
193 words
In combination, a stator including a fluid inlet and a fluid outlet, a rotor, means supporting said rotor for rotation relative to the stator and for relative shifting between the rotor and stator transversely of the rotor axis between predetermined first and second minimum and maximum displacement positions, yieldable spring means biasing said stator and rotor toward the relative minimum displacement positions thereof, and pressure responsive shift means for shifting said stator and rotor toward the relative maximum displacement positions thereof as the pressure within said inlet increases, said pressure responsive shift means including first and second fluid pressure actuated force means operatively associated with said stator and rotor to bias them toward their first and second fluid pressure force means including means for receiving fluid under pressure at a first restricted flow rate and a second higher flow rate, respectively, from said inlet, and fluid outlet means for said first force means as well as rotor speed responsive discharge valve means for said fluid outlet means operative to increasingly throttle the discharge of said fluid through said fluid outlet means in response to increasing rotor speed above a predetermined rotational speed thereof.
Claim 5
Dependent Claim
193 words
In combination, a stator including a fluid inlet and a fluid outlet, a rotor, means supporting said rotor for rotation relative to the stator and for relative shifting between the rotor and stator transversely of the rotor axis between predetermined first and second minimum and maximum displacement positions, yieldable spring means biasing said stator and rotor toward the relative minimum displacement positions thereof, and pressure responsive shift means for shifting said stator and rotor toward the relative maximum displacement positions thereof as the pressure within said inlet increases, said pressure responsive shift means including first and second fluid pressure actuated force means operatively associated with said stator and rotor to bias them toward their first and second fluid pressure force means including means for receiving fluid under pressure at a first restricted flow rate and a second higher flow rate, respectively, from said inlet, and fluid outlet means for said first force means as well as rotor speed responsive discharge valve means for said fluid outlet means operative to increasingly throttle the discharge of said fluid through said fluid outlet means in response to increasing rotor speed above a predetermined rotational speed thereof.
Claim 6
Dependent Claim
141 words
In combination, a stator including a fluid inlet and a fluid outlet, a rotor, means supporting said rotor for rotation relative to the stator and for relative shifting between the rotor and stator transversely of the rotor axis between predetermined first and second minimum and maximum displacement positions, yieldable spring means biasing said stator and rotor toward the relative minimum displacement positions thereof, and pressure responsive shift means for shifting said stator and rotor toward the relative maximum displacement positions thereof as the pressure within said inlet increases, said shift means including rotor speed actuated means for controllably venting fluid pressure from said inlet to allow said spring means to urge said stator and rotor toward their relative positions of minimum displacement from relative positions of greater displacement in response to increases of rotor speed above a predetermined rotational speed thereof.
Claim 7
Dependent Claim
141 words
In combination, a stator including a fluid inlet and a fluid outlet, a rotor, means supporting said rotor for rotation relative to the stator and for relative shifting between the rotor and stator transversely of the rotor axis between predetermined first and second minimum and maximum displacement positions, yieldable spring means biasing said stator and rotor toward the relative minimum displacement positions thereof, and pressure responsive shift means for shifting said stator and rotor toward the relative maximum displacement positions thereof as the pressure within said inlet increases, said shift means including rotor speed actuated means for controllably venting fluid pressure from said inlet to allow said spring means to urge said stator and rotor toward their relative positions of minimum displacement from relative positions of greater displacement in response to increases of rotor speed above a predetermined rotational speed thereof.
Claim 8
Dependent Claim
163 words
In a hydraulic fluid motor having an inlet anD an outlet and relatively positionable and movable components coacting to define a working chamber and in which the volume of fluid displaced for each output cycle is positive for predetermined relative positions of said components and which is varied in response to changes in relative position of said components; that improvement comprising means varying the relative position of the components for varying the volume of the positive displacement for each output cycle in response to load characteristics during operation of the motor, said means for varying the position of the components including means for spring biasing said relatively positionable components into a relative position to attain minimum volume displacement for each output cycle, and fluid pressure responsive means responsive to increase in supply pressure at the inlet to shift said components against said biasing means in a direction to increase volume displacement of the motor for each output cycle as the supply pressure increases.
Claim 9
Dependent Claim
163 words
In a hydraulic fluid motor having an inlet anD an outlet and relatively positionable and movable components coacting to define a working chamber and in which the volume of fluid displaced for each output cycle is positive for predetermined relative positions of said components and which is varied in response to changes in relative position of said components; that improvement comprising means varying the relative position of the components for varying the volume of the positive displacement for each output cycle in response to load characteristics during operation of the motor, said means for varying the position of the components including means for spring biasing said relatively positionable components into a relative position to attain minimum volume displacement for each output cycle, and fluid pressure responsive means responsive to increase in supply pressure at the inlet to shift said components against said biasing means in a direction to increase volume displacement of the motor for each output cycle as the supply pressure increases.
Claim 10
Dependent Claim
41 words
The structure as defined in claim 5 together with governor means operatively associated with said fluid pressure responsive means to decrease the effect of an increase in the supply pressure at the inlet as the speed of the output cycle increases.
Claim 11
Dependent Claim
24 words
The structure as defined in claim 6 wherein said motor includes at least one rotary component and a rotary output driving said governor means.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-05-27 | 1977-11-26 | 1978-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-27 | 1981-11-26 | 1982-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-27 | 1985-11-26 | 1986-05-28 | $7700.00 | Window Closed / Lapsed |