US3975866A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for machining housings for slant axis rotary mechanisms
Assignee: Caterpillar Inc
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Filing: 1975-11-24
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Granted: 1976-08-24
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Expires: 1995-11-24
Abstract
Abstract Method and apparatus for machining an end surface for a housing for a slant axis rotary mechanism having a slant angle of ⊖ and a rotor to shaft to housing timing ratio of S R /S S S H . The method includes the steps of providing a grinding tool within a fixed predetermined area, rotating a housing having an end surface to be machined about its central axis at a first rate of rotation R 1 with the end surface engaged by the tool, and simultaneously rotating the housing about a second axis intersecting the central axis at an angle ⊖ and at a second rate of rotation R 2 . The rates of rotation are chosen according to the following relations: R 1 = n(S H - S R ), and R 2 = n(S S - S R ). n Is an arbitrarily selected average angular velocity component. The disclosed apparatus performs the above method.
Inventors
- 👤 Donald F. Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:42
CPC Classifications
B; B24; B24B; B24B47/00; B24B47/02; B24B47/04; B24B19/00; Y; Y10; Y10T; Y10T409/00; Y10T409/30; Y10T409/303752; Y10T409/304536; Y10T409/305544; Y10T409/305656
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
143 words
A method of machining an end surface for a housing for a slant axis rotary mechanism having a slant angle of θ and a rotor-to-shaft-to-housing timing ratio of S R /S S /S H comprising the steps of: providing a grinding tool at a fixed predetermined area, rotating a housing having an end surface to be machined about its central axis at a first rate of rotation R 1 with the end surface engaged by said tool, and simultaneously rotating the housing about a second axis intersecting said central axis at an angle θ at a second rate of rotation R 2 , said rates of rotation being chosen according to the following relations: R 1 = n(S H - S R ), and R 2 = n(S S - S R ), where n is an arbitrarily selected average angular velocity component.
Claim 2
Independent Claim
143 words
A method of machining an end surface for a housing for a slant axis rotary mechanism having a slant angle of θ and a rotor-to-shaft-to-housing timing ratio of S R /S S /S H comprising the steps of: providing a grinding tool at a fixed predetermined area, rotating a housing having an end surface to be machined about its central axis at a first rate of rotation R 1 with the end surface engaged by said tool, and simultaneously rotating the housing about a second axis intersecting said central axis at an angle θ at a second rate of rotation R 2 , said rates of rotation being chosen according to the following relations: R 1 = n(S H - S R ), and R 2 = n(S S - S R ), where n is an arbitrarily selected average angular velocity component.
Claim 3
Dependent Claim
24 words
The method of claim 1 wherein said tool is reciprocated in said fixed area toward and away from the center of said end surface.
Claim 4
Dependent Claim
13 words
The method claim 1 wherein said tool is rotated about a fixed axis.
Claim 5
Dependent Claim
45 words
The method of claim 1 particularly suited for the machining of an end surface of a four-cycle, stationary housing slant axis rotary mechanism wherein S R /S S /S H is proportional to 1/3/0 and wherein: R 1 = -n, and R 2 = 2n.
Claim 6
Dependent Claim
182 words
Apparatus for machining an end surface for a housing for a slant axis rotary mechanism having a slant angle of θ and a rotor to shaft to housing timing ratio of S R /S S /S H , comprising: a grinding tool; means supporting said tool in a predetermined area; means for supporting a housing having an end surface to be machined with a portion of said end surface in said area to be engaged by said tool; means for rotating said supporting means at a first rate of rotation R 1 about a first axis such that such end surface is rotated about its central axis; means for simultaneously rotating said supporting means about a second axis intersecting said first axis at an angle θ at a rate of rotation R 2 ; and means establishing a relation between said rates of rotation R 1 and R 2 as follows: R 1 = n (S H - S R ) and R 2 = n (S S - S R ), where n is an arbitrarily selected average angular velocity component.
Claim 7
Dependent Claim
182 words
Apparatus for machining an end surface for a housing for a slant axis rotary mechanism having a slant angle of θ and a rotor to shaft to housing timing ratio of S R /S S /S H , comprising: a grinding tool; means supporting said tool in a predetermined area; means for supporting a housing having an end surface to be machined with a portion of said end surface in said area to be engaged by said tool; means for rotating said supporting means at a first rate of rotation R 1 about a first axis such that such end surface is rotated about its central axis; means for simultaneously rotating said supporting means about a second axis intersecting said first axis at an angle θ at a rate of rotation R 2 ; and means establishing a relation between said rates of rotation R 1 and R 2 as follows: R 1 = n (S H - S R ) and R 2 = n (S S - S R ), where n is an arbitrarily selected average angular velocity component.
Claim 8
Dependent Claim
19 words
The apparatus of claim 5 further including means for reciprocating said tool toward and away from said first axis.
Claim 9
Dependent Claim
24 words
The apparatus of claim 5 wherein said tool is constructed and arranged to generate substantially only radially extending machine marks on said end surface.
Claim 10
Dependent Claim
126 words
Apparatus for machining the end surface of a housing for a slant axis rotary mechanism; comprising: a stationary support; a grinding tool mounted on said support for operation in a predetermined area adjacent said support; a carriage; means mounting said carriage for rotation about a first axis and in proximity to said area; a work holder rotatably mounted on said carriage for rotation about a second axis intersecting said first axis at a predetermined angle, said work holder being adapted to hold a housing for a slant axis rotary mechanism within said area such that a surface thereof may be engaged by said tool; and means for simultaneously rotating said carriage and said work holder about said first and second axes, respectively, at different, predetermined rates.
Claim 11
Dependent Claim
126 words
Apparatus for machining the end surface of a housing for a slant axis rotary mechanism; comprising: a stationary support; a grinding tool mounted on said support for operation in a predetermined area adjacent said support; a carriage; means mounting said carriage for rotation about a first axis and in proximity to said area; a work holder rotatably mounted on said carriage for rotation about a second axis intersecting said first axis at a predetermined angle, said work holder being adapted to hold a housing for a slant axis rotary mechanism within said area such that a surface thereof may be engaged by said tool; and means for simultaneously rotating said carriage and said work holder about said first and second axes, respectively, at different, predetermined rates.
References Cited (Backward Citations)
US928164A
Cited
US3867868A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-24 | 1980-02-23 | 1980-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-24 | 1984-02-23 | 1984-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-24 | 1988-02-23 | 1988-08-24 | $7700.00 | Window Closed / Lapsed |