US3846051A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Valving arrangement in a hydraulic device
Assignee: Eaton Corp
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Filing: 1973-01-03
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Granted: 1974-11-05
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Expires: 1993-01-03
Abstract
Abstract An improved valving arrangement for a fluid operated pulley motor of the gerotor type wherein an internally-toothed member having a number (N) of teeth eccentrically receives an externally-toothed member having one less (N-1) teeth. The members are relatively movable to define a number (N) of contracting and expanding volume chambers formed by tooth interaction. The externally toothed member is fixedly mounted on a stationary shaft having tubular portions at its opposite ends configured for attachment to a pressurized fluid supply and fluid exhaust respectively. The internally toothed member is mounted for orbital and rotational motion about the axis of the externally toothed member to define a moving line of eccentricity which separates the expanding chambers from the contracting chambers. A number (N) of equally spaced discontinuous recesses extend from each axial end face of the ring member and open to the volume chambers. Each axial end face of the internally toothed member abuttingly engages a confronting face within the gerotor housing containing a similar number (N) of particularly disposed valving passages. The passages and recesses are orientated and arranged so that orbital motion of the ring member provides fluid communication between certain of the passages adjacent one axial end face and all expanding volume chambers; and fluid communication between certain of the passages adjacent the other axial end face and all of the contracting chambers. Thus, high pressure at one axial end face may be communicated to all of the expanding chambers at one side of a line of eccentricity while low pressure at the other axial end face communicates with all of the contracting chambers at the other side of the line of eccentricity.
Inventors
- 👤 H Mcdermott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:07
CPC Classifications
F; F04; F04C; F04C2/00; F04C2/08; F04C2/10; F04C2/103; F04C2/105
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
391 words
A pulley motor of the gerotor type comprising: a one-piece shaft having an externally-toothed member extending over a central portion thereof, said shaft having tubular portions at its opposite ends to define a fluid inlet and a fluid outlet for said motor; a first hollowed cylindrical casing section disposed around said shaft at one side of said externally toothed member and journalling said shaft therein; a second hollowed cylindrical casing section disposed at the other side of said externally toothed member and journalling said shaft therein; a cylindrical ring casing member interposed and secured to said first and second casing sections to define a housing; an internally-toothed member having more teeth than said externally toothed member and being eccentrically disposed for movement relative to said externally toothed member, the teeth of said members interenmeshing to define contracting and expanding volume chambers during relative movement therebetween; said internally toothed member being disposed within said ring casing member; drive means co-acting between said ring casing member and said internally toothed member and operable to rotate said ring casing member in response to hypocycloidal movement of said internally toothed member about said externally toothed member; and valve means operable between said inlet at one end of said shaft and said outlet at the other end of said shaft to connect said inlet to the expanding volume chambers and said outlet to contracting volume chambers to cause said internally toothed member to hypocycloidally move about said externally toothed member; said valve means including first and second valve members mounted in said housing for rotation therewith adjacent opposite ends of said internally toothed member, said valve members each having a plurality of flow passages therein, the number of flow passages in each member being equal to the number of volume chambers, a particular one of said flow passages in each member being associated with a particular one of said volume chambers, and said internally toothed member having a like plurality of flow recesses in each axial end surface thereof, the arrangement of said recesses being such as to provide a fluid flow path between the expanding chambers and their associated passages in said first valve member and between the contracting chambers and their associated passages in said second valve member through said recesses during movement of said internally toothed member relative to said externally toothed member.
Claim 2
Dependent Claim
391 words
A pulley motor of the gerotor type comprising: a one-piece shaft having an externally-toothed member extending over a central portion thereof, said shaft having tubular portions at its opposite ends to define a fluid inlet and a fluid outlet for said motor; a first hollowed cylindrical casing section disposed around said shaft at one side of said externally toothed member and journalling said shaft therein; a second hollowed cylindrical casing section disposed at the other side of said externally toothed member and journalling said shaft therein; a cylindrical ring casing member interposed and secured to said first and second casing sections to define a housing; an internally-toothed member having more teeth than said externally toothed member and being eccentrically disposed for movement relative to said externally toothed member, the teeth of said members interenmeshing to define contracting and expanding volume chambers during relative movement therebetween; said internally toothed member being disposed within said ring casing member; drive means co-acting between said ring casing member and said internally toothed member and operable to rotate said ring casing member in response to hypocycloidal movement of said internally toothed member about said externally toothed member; and valve means operable between said inlet at one end of said shaft and said outlet at the other end of said shaft to connect said inlet to the expanding volume chambers and said outlet to contracting volume chambers to cause said internally toothed member to hypocycloidally move about said externally toothed member; said valve means including first and second valve members mounted in said housing for rotation therewith adjacent opposite ends of said internally toothed member, said valve members each having a plurality of flow passages therein, the number of flow passages in each member being equal to the number of volume chambers, a particular one of said flow passages in each member being associated with a particular one of said volume chambers, and said internally toothed member having a like plurality of flow recesses in each axial end surface thereof, the arrangement of said recesses being such as to provide a fluid flow path between the expanding chambers and their associated passages in said first valve member and between the contracting chambers and their associated passages in said second valve member through said recesses during movement of said internally toothed member relative to said externally toothed member.
Claim 3
Dependent Claim
354 words
A fluid-operated device of the gerotor type comprising: a housing; a ring casing member forming a portion of said housing; an internally-toothed member disposed within said ring casing member; drive means operably associated between said internally toothed member and said ring-casing member to transmit rotational driving motion therebetween while permitting relative orbital motion therebetween; a shaft member journalled in said housing for rotation relative thereto and defining a fluid inlet and a fluid outlet at opposite axial ends thereof; an externally-toothed member with less teeth than said internally toothed member mounted on said shaft and extending over a portion thereof; said internally toothed member being eccentrically disposed for rotational and orbital motion relative to said externally toothed member; the teeth of said members interenmeshing to form a predetermined number of expanding and contracting volume chambers during relative movement therebetween; the axes of said members defining a moving line of eccentricity during operation of said device to divide the expanding volume chambers from contracting volume chambers; and valve means for providing fluid communication between said inlet and those volume chambers on one side of said line of eccentricity, and for providing fluid communication between said outlet and those volume chambers on the other side of said line; said valve means including a first valve member having a plurality of first fluid passages therein, a second valve member having a plurality of second fluid passages therein, all of said first passages having constant fluid communication with said inlet and all of said second passages having constant fluid communication with said outlet, said first and second valve members being fixedly secured in said housing to prevent relative motion therebetween, and each axial end face of said internally toothed member having a plurality of circumferentially arranged, equally spaced, discontinuous recesses therein, each of said recesses extending from an axial end face of said internally toothed member and opening to the internal periphery of said member adjacent a volume chamber, said recesses co-operating with said passages to alternately provide a fluid flow path to and from each of said volume chambers during orbital motion of said internally toothed member.
Claim 4
Dependent Claim
354 words
A fluid-operated device of the gerotor type comprising: a housing; a ring casing member forming a portion of said housing; an internally-toothed member disposed within said ring casing member; drive means operably associated between said internally toothed member and said ring-casing member to transmit rotational driving motion therebetween while permitting relative orbital motion therebetween; a shaft member journalled in said housing for rotation relative thereto and defining a fluid inlet and a fluid outlet at opposite axial ends thereof; an externally-toothed member with less teeth than said internally toothed member mounted on said shaft and extending over a portion thereof; said internally toothed member being eccentrically disposed for rotational and orbital motion relative to said externally toothed member; the teeth of said members interenmeshing to form a predetermined number of expanding and contracting volume chambers during relative movement therebetween; the axes of said members defining a moving line of eccentricity during operation of said device to divide the expanding volume chambers from contracting volume chambers; and valve means for providing fluid communication between said inlet and those volume chambers on one side of said line of eccentricity, and for providing fluid communication between said outlet and those volume chambers on the other side of said line; said valve means including a first valve member having a plurality of first fluid passages therein, a second valve member having a plurality of second fluid passages therein, all of said first passages having constant fluid communication with said inlet and all of said second passages having constant fluid communication with said outlet, said first and second valve members being fixedly secured in said housing to prevent relative motion therebetween, and each axial end face of said internally toothed member having a plurality of circumferentially arranged, equally spaced, discontinuous recesses therein, each of said recesses extending from an axial end face of said internally toothed member and opening to the internal periphery of said member adjacent a volume chamber, said recesses co-operating with said passages to alternately provide a fluid flow path to and from each of said volume chambers during orbital motion of said internally toothed member.
Claim 5
Dependent Claim
43 words
The fluid-operated device of claim 2 wherein said valving passages and said recesses at one axial end face of said internally toothed member are orientated in the mirror image of said recesses and valving passages at the opposite axial end of said member.
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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) | 1977-11-04 | 1978-05-06 | 1978-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-04 | 1982-05-06 | 1982-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-04 | 1986-05-06 | 1986-11-05 | $7700.00 | Window Closed / Lapsed |