US3881365A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gearing
Assignee: Motors Liquidation Co
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Filing: 1974-04-01
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Granted: 1975-05-06
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Expires: 1994-04-01
Abstract
Abstract The purpose here is to provide the teeth of one of mating spur gears with a profile which results in the diminution of the operative noise level thereof. Specifically, the entering edge of each of the teeth of one of the gears is relieved in a manner which provides a ramp effect across the length thereof, causing each tooth to enter lightly or progressively, rather than all at once across its full length with an abrupt shock. For applications involving both directions of rotation, such relief results in substantially a frusto-conical shape for the gear, whereas, for applications having one direction of rotation, the relief is a tapered edge on one side of each tooth.
Inventors
- 👤 Alexander Hardy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:05
CPC Classifications
F; F16; F16H; F16H55/00; F16H55/02; F16H55/08; F16H55/0886; F16H2055/0893; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19949; Y10T74/19963; Y10T74/19972
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
109 words
A pair of meshing spur gears comprising a first conventIonally formed spur gear and a second spur gear having a taper formed along at least one edge of the crown of each tooth thereof, said taper beginning at a tip of said crown at one end of each tooth and extending uniformly along the full length of said tooth to the other end thereof so as to progressively diminish the height of the contacting portion of the wall of said tooth, providing a tapered edge with respect to the axis of said second spur gear for progressively contacting an adjacent wall of a tooth of said first spur gear.
Claim 2
Dependent Claim
109 words
A pair of meshing spur gears comprising a first conventIonally formed spur gear and a second spur gear having a taper formed along at least one edge of the crown of each tooth thereof, said taper beginning at a tip of said crown at one end of each tooth and extending uniformly along the full length of said tooth to the other end thereof so as to progressively diminish the height of the contacting portion of the wall of said tooth, providing a tapered edge with respect to the axis of said second spur gear for progressively contacting an adjacent wall of a tooth of said first spur gear.
Claim 3
Dependent Claim
110 words
A pari of meshing spur gears comprising a first conventionally formed spur gear and a second spur gear having a taper formed along the crown of each tooth thereof, said taper beginning at an edge of said crown at one end of each tooth and extending uniformly along the full length of said tooth to the other end thereof so as to progressively diminish the contacting height of both walls of said tooth, providing a tapered edge along both sides of said each tooth for progressively contacting an adjacent wall of a tooth of said first spur gear regardless of which direction said first and second spur gears are rotating.
Claim 4
Dependent Claim
110 words
A pari of meshing spur gears comprising a first conventionally formed spur gear and a second spur gear having a taper formed along the crown of each tooth thereof, said taper beginning at an edge of said crown at one end of each tooth and extending uniformly along the full length of said tooth to the other end thereof so as to progressively diminish the contacting height of both walls of said tooth, providing a tapered edge along both sides of said each tooth for progressively contacting an adjacent wall of a tooth of said first spur gear regardless of which direction said first and second spur gears are rotating.
Claim 5
Dependent Claim
108 words
A pair of meshing spur gears comprising a conventionally formed internal spur gear and an external spur gear having a taper formed along the trailing edge of the crown of each tooth thereof, said taper beginning at a tip of said crown at one end of each tooth and extending uniformly along the full length of said tooth to the other end thereof so as to progressively diminish the height of the contacting portion of the wall of said tooth, providing a tapered edge with respect to the axis of said external spur gear for progressively contacting an adjacent wall of a tooth of said internal spur gear.
Claim 6
Dependent Claim
108 words
A pair of meshing spur gears comprising a conventionally formed internal spur gear and an external spur gear having a taper formed along the trailing edge of the crown of each tooth thereof, said taper beginning at a tip of said crown at one end of each tooth and extending uniformly along the full length of said tooth to the other end thereof so as to progressively diminish the height of the contacting portion of the wall of said tooth, providing a tapered edge with respect to the axis of said external spur gear for progressively contacting an adjacent wall of a tooth of said internal spur gear.
Claim 7
Dependent Claim
109 words
A pair of meshing spur gears comprising a conventionally formed spur gear rack and an external spur gear having a taper formed along at least one edge of the crown of each tooth thereof, said taper beginning at a tip of said crown at one end of each tooth and extending uniformly along the full length of said tooth to the other end thereof so as to progressively diminish the height of the contacting portion of the wall of said tooth, providing a tapered edge with respect to the axis of said external spur gear for progressively contacting an adjacent wall of a tooth of said spur gear rack.
Claim 8
Dependent Claim
109 words
A pair of meshing spur gears comprising a conventionally formed spur gear rack and an external spur gear having a taper formed along at least one edge of the crown of each tooth thereof, said taper beginning at a tip of said crown at one end of each tooth and extending uniformly along the full length of said tooth to the other end thereof so as to progressively diminish the height of the contacting portion of the wall of said tooth, providing a tapered edge with respect to the axis of said external spur gear for progressively contacting an adjacent wall of a tooth of said spur gear rack.
Claim 9
Dependent Claim
113 words
A pair of meshing spur gears comprising a first conventionally formed external spur gear and a second external spur gear having a taper formed along at least one edge of the crown of each tooth thereof, said taper beginning at a tip of said crown at one end of each tooth and extending uniformly along the full length of said tooth to the other end thereof so as to progressively diminish the height of the contacting portion of the wall of said tooth, providing a tapered edge with respect to the axis of said second external spur gear for progressively contacting an adjacent wall of a tooth of said first external spur gear.
Claim 10
Dependent Claim
113 words
A pair of meshing spur gears comprising a first conventionally formed external spur gear and a second external spur gear having a taper formed along at least one edge of the crown of each tooth thereof, said taper beginning at a tip of said crown at one end of each tooth and extending uniformly along the full length of said tooth to the other end thereof so as to progressively diminish the height of the contacting portion of the wall of said tooth, providing a tapered edge with respect to the axis of said second external spur gear for progressively contacting an adjacent wall of a tooth of said first external spur gear.
Claim 11
Dependent Claim
131 words
A pair of meshing spur gears comprising a first conventionally formed external spur gear and a second external spur gear having one end of each tooth thereof formed narrower than the other end thereof and having a taper formed along at least one edge of the crown of each tooth thereof, said taper beginning at a tip of said crown at said one end of each tooth and extending uniformly along the full length of said tooth to said other end thereof so as to progressively diminish the height of the contacting portion of the wall of said tooth and thus provide a tapered edge with respect to the axis of said second external spur gear for progressively contacting an adjacent wall of a tooth of said first external spur gear.
Claim 12
Dependent Claim
131 words
A pair of meshing spur gears comprising a first conventionally formed external spur gear and a second external spur gear having one end of each tooth thereof formed narrower than the other end thereof and having a taper formed along at least one edge of the crown of each tooth thereof, said taper beginning at a tip of said crown at said one end of each tooth and extending uniformly along the full length of said tooth to said other end thereof so as to progressively diminish the height of the contacting portion of the wall of said tooth and thus provide a tapered edge with respect to the axis of said second external spur gear for progressively contacting an adjacent wall of a tooth of said first external spur gear.
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) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |