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US3894822A Expired / Lapsed US ⏱️ 0.0 years remaining

Interengaging rotor displacement machine

Assignee: Individual
•
Filing: 1974-04-22
•
Granted: 1975-07-15
•
Expires: 1994-04-22
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Abstract

Abstract A rotary displacement machine provided with a casing having pipe connections for the suction and discharge of the working fluid. The discharge pipe connection communicates with discharge ports made on each face surface of the casing. Installed rotatably inside the casing is a driving straight-toothed rotor and a driven straight-toothed rotor. The profiles of the teeth of the driving and driven rotors are selected so that on rotating, these teeth roll over one another. The driving rotor rotates the driven rotor via a train of two meshing gears. One of the meshing gears is installed on the shaft of the driving rotor and the other gear on the shaft of the driven rotor. Apart from transmitting rotation, the meshing gears ensure a guaranteed clearance between the rotor teeth which is required for a reliable performance of the machine. The cylindrical surface of the driving straighttoothed rotor is provided with lobes which are located, each between the rotor teeth. Each tooth of the driven rotor has a depression on the external cylindrical surface for equalizing the pressure between the cavities of the driven and driving rotors during compression of the working fluid. The cavity of the driven rotor is formed by a space between its teeth and the internal surface of the casing. The cavity of the driving rotor is formed by the space between its teeth and the internal surface of the casing. The depression on the cylindrical surface on the driven rotor tooth is limited at the front edge of the tooth, in the direction of rotation of the driven rotor, by the body of the tooth and at both faces of the tooth also by the body of the tooth. The dimensions of the depression correspond to the dimensions of the lobe on the cylindrical surface of the driving rotor so that during rotation of both rotors, the lobe covers the depression and separates the zone of equalized pressure from the suction zone.

Inventors

  • 👤 Alfred Ibragimovich Abaidullin
  • 👤 Ibragim Gabdulkhakov Khisameev
  • 👤 Adolf Leonidovich Verny
  • 👤 Avely Isaevich Shvarts
  • 👤 Vladimir Borisovich Shnepp
  • 👤 Ildus Gabterievic Galiakhmetov

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-01 15:28
CPC Classifications
F; F01; F01C; F01C1/00; F01C1/08; F01C1/12; F01C1/14; F01C1/20; F01C1/082; F01C1/084

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 343 words
A rotary displacement machine comprising: a casing having an internal surface; a pipe connection located on said casing and serving for sucking in the working fluid; a pipe connection located on said casing and serving for discharging the working fluid; a straight-toothed driving rotor installed rotatably in said casing; said driving rotor having a cylindrical surface; lobes located on said cylindrical surface of said rotor, each lobe being positioned between said straight teeth of said rotor; a straight-toothed driven rotor installed inside said casing; a gear train consisting of two meshing gears for transmitting rotation from said driving rotor to said driven rotor and for ensuring a guaranteed clearance between said teeth of said driven and driving rotors; a shaft for said driving rotor which carries one of said meshing gears; a shaft for said driven rotor which carries the other of said meshing gears; an external cylindrical surface for each tooth of said driven rotor; spaces between said teeth of said driving rotor and driven rotor; a cavity for said driven rotor formed by said space between said teeth of said driven rotor and the internal surface of said casing; a cavity for said driving rotor formed by said space between said teeth of said driving rotor and the internal surface of said casing; a depression serving to equalize pressure between said cavity of said driven rotor and said cavity of said driving rotor during compression of the working medium, said depression being located on said cylindrical surface of each tooth of said driven rotor and limited by the body of said tooth at the front edge of said driven rotor tooth, in the direction of rotation of said driven rotor, and by the body of the same tooth at both end faces of said tooth, the dimensions of said depression corresponDing to the dimensions of said lobe on said cylindrical surface of said driving rotor so that during rotation of said driving and driven rotors, said lobe covers said depression and separates the zone of equalized pressure from the suction zone.
Claim 2
Dependent Claim 343 words
A rotary displacement machine comprising: a casing having an internal surface; a pipe connection located on said casing and serving for sucking in the working fluid; a pipe connection located on said casing and serving for discharging the working fluid; a straight-toothed driving rotor installed rotatably in said casing; said driving rotor having a cylindrical surface; lobes located on said cylindrical surface of said rotor, each lobe being positioned between said straight teeth of said rotor; a straight-toothed driven rotor installed inside said casing; a gear train consisting of two meshing gears for transmitting rotation from said driving rotor to said driven rotor and for ensuring a guaranteed clearance between said teeth of said driven and driving rotors; a shaft for said driving rotor which carries one of said meshing gears; a shaft for said driven rotor which carries the other of said meshing gears; an external cylindrical surface for each tooth of said driven rotor; spaces between said teeth of said driving rotor and driven rotor; a cavity for said driven rotor formed by said space between said teeth of said driven rotor and the internal surface of said casing; a cavity for said driving rotor formed by said space between said teeth of said driving rotor and the internal surface of said casing; a depression serving to equalize pressure between said cavity of said driven rotor and said cavity of said driving rotor during compression of the working medium, said depression being located on said cylindrical surface of each tooth of said driven rotor and limited by the body of said tooth at the front edge of said driven rotor tooth, in the direction of rotation of said driven rotor, and by the body of the same tooth at both end faces of said tooth, the dimensions of said depression corresponDing to the dimensions of said lobe on said cylindrical surface of said driving rotor so that during rotation of said driving and driven rotors, said lobe covers said depression and separates the zone of equalized pressure from the suction zone.
Claim 3
Dependent Claim 199 words
The rotary displacement machine according to claim 1 wherein the front side, in the direction of rotation of the driven rotor, of said depression on said cylindrical surface of said tooth of said driven rotor is described by an arc whose center lies on the pitch circle of said driven rotor and whose radius is equal to the difference between the radii of the pitch circle of said driven rotor and of the inside circle of said depression, the front side, in the direction of rotation of said driving rotor, of said lobe is described by an arc whose center lies on the pitch circle of said driving rotor and whose radius is equal to the difference between the radii of the outside circle of said lobe and of the pitch circle of said driving rotor and wherein the back side of said lobe is described by a shortened epicycloid formed by the point of intersection of the inside diameter of said depression on said cylindrical surface of said tooth with said space between said teeth of said driven rotor when the pitch circle of said driven rotor rolls without slipping over the pitch circle of said driving rotor.
Claim 4
Dependent Claim 159 words
The rotary displacement machine according to claim 1 wherein the front side, in the direction of rotation of said driven rotor, of said depression on said cylindrical surface of said tooth of said driven rotor is described by an arc whose center lies outside the pitch circle of said driven rotor while the front side, in the direction of rotation of said driving rotor, of said lobe is described by a rolling curve which satisfies the requirement of continuous contact between said front side of said depression and said front side of said lobe and wherein the back side of said lobe is described by a shortened epicycloid which is formed by a point of intersection between the inside diameter of said depression on said cylindrical surface of said tooth with said space between said teeth of said driven rotor when the pitch circle of said driven rotor rolls without slipping over the pitch circle of said driving rotor.

References Cited (Backward Citations)

US899148A Cited
US2464481A Cited
US2786332A Cited
US3453992A Cited
US3612735A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1978-07-14 1979-01-13 1979-07-15 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-07-14 1983-01-13 1983-07-15 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-07-14 1987-01-13 1987-07-15 $7700.00 Window Closed / Lapsed

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