Patent US3557922A successfully refreshed from Google Patents.
US3557922A
Expired / Lapsed
US
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Centrifugal governor for a multiple-speed hub
Assignee: ZF Friedrichshafen AG
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Filing: 1969-07-02
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Granted: 1971-01-26
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Expires: 1989-07-02
Abstract
Abstract A pawl-and-ratchet coupling in a multiple-speed bicycle hub which is engaged and disengaged to shift the transmission ratio of the hub is controlled by cams on an annular control member interposed axially between the pawl carrier of the coupling and flyweights pivotally mounted on axial pins fastened to the pawl carrier and passing through the control member. The control member is moved angularly relative to the pawl carrier by a pin on one of the flyweights engaging a recess in the control member so that the cams on the control member retract or release the pawls of the coupling as the centrifugal forces acting on the flyweights increase and decrease.
Inventors
- 👤 Hans Joachim Schwerdhoefer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:05
CPC Classifications
B; B62; B62M; B62M11/00
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
203 words
In a centrifugally controlled pawl-and-ratchet coupling for a multiple-speed hub of a bicycle and like vehicle, the coupling including a pawl carrier and a ratchet rotatable about a common axis, a pawl on said carrier, yieldably resilient means biasing said pawl toward torque transmitting engagement with said ratchet, a flyweight member mounted for rotation about an axis and for radial movement relative to said axis, return means biasing said member toward said axis, and control means for controlling engagement of said pawl with said ratchet in response to said movement of said member, the improvement which comprises: a. mounting means securing said member to said pawl carrier for joint rotation about said common axis and for movement of said member relative to said common axis in a radially extending direction; b. said control means including: 1. a control member rotatable about said common axis, 2. motion transmitting means connecting said control member to said flyweight member for displacement of the control member relative to said pawl carrier between two positions in response to said radial movement of the flyweight member; and 3. cam means on said control member disengaging said pawl from said ratchet in one of said positions of the control member.
Claim 2
Dependent Claim
203 words
In a centrifugally controlled pawl-and-ratchet coupling for a multiple-speed hub of a bicycle and like vehicle, the coupling including a pawl carrier and a ratchet rotatable about a common axis, a pawl on said carrier, yieldably resilient means biasing said pawl toward torque transmitting engagement with said ratchet, a flyweight member mounted for rotation about an axis and for radial movement relative to said axis, return means biasing said member toward said axis, and control means for controlling engagement of said pawl with said ratchet in response to said movement of said member, the improvement which comprises: a. mounting means securing said member to said pawl carrier for joint rotation about said common axis and for movement of said member relative to said common axis in a radially extending direction; b. said control means including: 1. a control member rotatable about said common axis, 2. motion transmitting means connecting said control member to said flyweight member for displacement of the control member relative to said pawl carrier between two positions in response to said radial movement of the flyweight member; and 3. cam means on said control member disengaging said pawl from said ratchet in one of said positions of the control member.
Claim 3
Dependent Claim
36 words
motion transmitting means connecting said control member to said flyweight member for displacement of the control member relative to said pawl carrier between two positions in response to said radial movement of the flyweight member; and
Claim 4
Dependent Claim
36 words
motion transmitting means connecting said control member to said flyweight member for displacement of the control member relative to said pawl carrier between two positions in response to said radial movement of the flyweight member; and
Claim 5
Dependent Claim
29 words
In a coupling as set forth in claim 1, said mounting means pivotally fastening said flyweight member to said pawl carrier for angular movement relative to said common axis.
Claim 6
Dependent Claim
21 words
cam means on said control member disengaging said pawl from said ratchet in one of said positions of the control member.
Claim 7
Dependent Claim
21 words
cam means on said control member disengaging said pawl from said ratchet in one of said positions of the control member.
Claim 8
Dependent Claim
51 words
In a coupling as set forth in claim 1, said motion transmitting means angularly displacing said control member between said two positions, and said cam means having a cam face, the cam face having two portions angularly offset relative to said common axis and respEctively nearer and farther from said axis.
Claim 9
Dependent Claim
33 words
In a coupling as set forth in claim 3, said motion transmitting means including a pin projecting from one of said members, the other member being formed with a recess receiving said member.
Claim 10
Dependent Claim
55 words
In a coupling as set forth in claim 3, said control member being annular about said common axis, and being formed with an aperture axially therethrough, said cam face bounding said aperture in a radially outward direction, and a portion of said pawl being movably received in said aperture for engagement by said cam face.
Claim 11
Dependent Claim
48 words
In a coupling as set forth in claim 1, sa id control member having a wall radially interposed between said pawl carrier and said ratchet, said wall being formed with a notch therein and having an edge portion bounding said notch, said edge portion constituting said cam means.
Claim 12
Dependent Claim
71 words
In a coupling as set forth in claim 1, a second flyweight member, mounting means securing said second flyweight member to said pawl carrier for joint rotation about said common axis and for movement relative to said common axis in a radially extending direction, and linking means linking said flyweight members for symmetrical movement relative to said common axis when one of said flyweight members moves in said radially extending direction.
Claim 13
Dependent Claim
29 words
In a coupling as set forth in claim 7, said linking means including gear means on each flyweight member, the gear means on said flyweight members being meshingly engaged.
Claim 14
Dependent Claim
63 words
In a coupling as set forth in claim 7, said flyweight members being axially offset from said pawl carrier, said mounting means including two mounting members axially extending from said pawl pawl carrier in a common direction and respectively carrying said flyweight members, and abutment means on said control member respectively engaging said mounting members in said two positions of said control member.
Claim 15
Dependent Claim
42 words
In a coupling as set forth in claim 9, a portion of said control member being axially interposed between said pawl carrier and said flyweight members and being formed with an opening therein, said mounting members being movably received in said opening.
References Cited (Backward Citations)
US2910157A
Cited
US3494227A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |