US3762234A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuously adjustable back lash free power transfer mechanism
Assignee: Tri Ordinate Corp
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Filing: 1972-07-20
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Granted: 1973-10-02
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Expires: 1992-07-20
Abstract
Abstract An improved adjustment mechanism for taking up back lash producing looseness due to normal wear and tear in the gear train of a back lash free power transfer mechanism. In construction the adjustment mechanism includes a pair of coacting rotatably mounted members operatively connected to the gear train of the power transfer mechanism and arranged such that rotation of one of these members causes corresponding rotation of the other member, in turn, realigning intermeshing gear teeth of the gear train to remove back lash producing gaps or play therebetween.
Inventors
- 👤 N Hoglund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:14
CPC Classifications
F; F16; F16H; F16H55/00; F16H55/02; F16H55/22; F16H55/24; F16H57/00; F16H57/12; F16H2057/121; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19623; Y10T74/19642; Y10T74/19698; Y10T74/19828
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
200 words
In a mechanism for transferring power free of back lash from a drive shaft to a driven shaft, said mechanism comprising a gear train means including a rotatable shaft, a gearing element mounted on the rotatable shaft for selective angular adjustment relative thereto, and adjustment means for changing the relative angular position of said gearing element and said rotatable shaft to take up back lash producing play in the gear train, the improvement wherein the adjustment means comprises: a. support means mounted for rotation with said selectively adjustable gearing element; b. a first member mounted on said support means for rotation with said rotatable shaft; c. a second member mounted on said support means for selective movement along a predetermined path relative to said first member and said support means, said first and second members having interacting portions such that movement of said second member along said predetermined path causes rotation of the first member and a change in the angular position of said rotatable shaft relative to said gearing element; and d. selectively operable retaining means for preventing movement of the second member along said predetermined path during transmission of power from said drive shaft to the driven shaft.
Claim 2
Dependent Claim
200 words
In a mechanism for transferring power free of back lash from a drive shaft to a driven shaft, said mechanism comprising a gear train means including a rotatable shaft, a gearing element mounted on the rotatable shaft for selective angular adjustment relative thereto, and adjustment means for changing the relative angular position of said gearing element and said rotatable shaft to take up back lash producing play in the gear train, the improvement wherein the adjustment means comprises: a. support means mounted for rotation with said selectively adjustable gearing element; b. a first member mounted on said support means for rotation with said rotatable shaft; c. a second member mounted on said support means for selective movement along a predetermined path relative to said first member and said support means, said first and second members having interacting portions such that movement of said second member along said predetermined path causes rotation of the first member and a change in the angular position of said rotatable shaft relative to said gearing element; and d. selectively operable retaining means for preventing movement of the second member along said predetermined path during transmission of power from said drive shaft to the driven shaft.
Claim 3
Dependent Claim
89 words
The improvement according to claim 1 wherein: a. the first and second members each comprise a rotatably mounted element of circular cross-section; and b. the outer peripheral surface of said members are disposed in engaging relationship; c. the movement of said second member along said predetermined path is defined by rotation of said second member about its own axis of mounting; and d. the interacting portions of said members are disposed on said peripheral surfaces such that rotation of the second element causes corresponding rotation of the first element.
Claim 4
Dependent Claim
23 words
The improvement according to claim 2 wherein the axes of rotation of the first and second circular elements are disposed in perpendicular relationship.
Claim 5
Dependent Claim
14 words
The improvement according to claim 3 wherein said interacting portions comprise intermeshing gear-like teeth.
Claim 6
Dependent Claim
60 words
The improvement according to claim 2 wherein said selectively operable retaining means comprises: a. a pair of compression bearings axially disposed on opposite ends of the second circular element in contacting relationship thereto; and b. releasable compression means for applying sufficient axial force to said compression bearings to tightly bind the second circular element against rotation about its own axis.
Claim 7
Dependent Claim
97 words
The improvement according to claim 5 wherein said retaining means further includes: a. a shaft element for mounting the second circular element fixed thereto; b. a bore in the housing for receiving the shaft element, said bore having a shoulder at one end forming a seating surface for one of said compression bearings; c. an adjustable retaining member disposed axially above the other of said compression bearings for axial mOvement within said bore into tight engagement with said other compression bearing; and d. holding means for locking said retaining member in place against said other compression bearing.
Claim 8
Dependent Claim
68 words
The improvement according to claim 6 wherein: a. the other end of said bore is open; and b. said shaft element includes an extension piece extending externally of said housing through the open end of said bore, said shaft extension being adapted to fit a wrench or other suitable device for turning said second circular element to take-up back lash producing play upon release of said retaining means.
Claim 9
Dependent Claim
23 words
The improvement according to claim 7 wherein the axes of rotation of the first and second circular elements are disposed in perpendicular relationship.
Claim 10
Dependent Claim
47 words
The improvement according to claim 8 wherein: a. said interacting portions comprise intermeshing gear-like teeth; and b. said retaining member comprises a nut element threadedly disposed within said bore, said nut element being accessible for adjustment externally of said housing through the open end of said bore.
Claim 11
Dependent Claim
31 words
The improvement according to claim 9 wherein said holding means comprises a set screw adapted to engage said nut element, said set screw being accessible for adjustment externally of said housing.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |