US3621958A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bidirectional no-back unit for ball screw utilizing roller cams
Assignee: SAGINAW PRODUCTS CORP
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Filing: 1970-08-17
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Granted: 1971-11-23
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Expires: 1990-08-17
Abstract
Abstract Apparatus comprising a rotatable output member, a rotatable drive member for rotating the output member in either direction, a releasable brake for substantially preventing rotation of the output member in either direction when it is not being driven by the drive member, and mechanism operable to release the brake upon a predetermined rotation of the drive member in either direction.
Inventors
- 👤 Edwin O Klemm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:02
CPC Classifications
F; F16; F16B; F16B1/00; F16B1/02; F16B1/04
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
191 words
Apparatus in which the bidirectional rotation of rotatable output means is controlled comprising: rotatable drive means for selectively driving said rotatable output means in either direction of rotation; brake means for selectively preventing rotation of said rotatable output means and being movable from a braking position for preventing rotation of said rotatable output means in either direction to a nonbraking position; means for moving said brake means between said braking and nonbraking positions including: brake mount means operably coupled with said rotatable output means and said brake means; rolling means on one of said mount means and said drive means; a rolling means receiving portion on the other of said mount means and said drive means including edge means providing substantially line contact engaging surface means with said rolling means when engaged therewith; said rolling means cooperating only with said engaging surface means, after a predetermined relative angular displacement of said rolling means and said receiving portion in a first direction, for moving said brake means to said nonbraking position and after a predetermined angular displacement in the opposite direction for permitting said brake means to return to said braking position.
Claim 2
Dependent Claim
191 words
Apparatus in which the bidirectional rotation of rotatable output means is controlled comprising: rotatable drive means for selectively driving said rotatable output means in either direction of rotation; brake means for selectively preventing rotation of said rotatable output means and being movable from a braking position for preventing rotation of said rotatable output means in either direction to a nonbraking position; means for moving said brake means between said braking and nonbraking positions including: brake mount means operably coupled with said rotatable output means and said brake means; rolling means on one of said mount means and said drive means; a rolling means receiving portion on the other of said mount means and said drive means including edge means providing substantially line contact engaging surface means with said rolling means when engaged therewith; said rolling means cooperating only with said engaging surface means, after a predetermined relative angular displacement of said rolling means and said receiving portion in a first direction, for moving said brake means to said nonbraking position and after a predetermined angular displacement in the opposite direction for permitting said brake means to return to said braking position.
Claim 3
Dependent Claim
41 words
The combination as set forth in claim 1 wherein said rolling means receiving portion includes a notch formed in one of said mount means and drive means, and said edge means consists of the edge of the sidewall of the notch.
Claim 4
Dependent Claim
26 words
The combination as set forth in claim 2 wherein said notch has marginal sidewalls lying in planes which are substantially parallel to the axis of rotation.
Claim 5
Dependent Claim
23 words
The combination as set forth in claim 2 wherein the diameter of said rolling means is greater than the width of said notch.
Claim 6
Dependent Claim
26 words
The combination as set forth in claim 2 wherein said rolling means and notch means are mounted to provide play between them in the nonbraked position.
Claim 7
Dependent Claim
15 words
The combination as set forth in claim 5 including means for adjusting the play provided.
Claim 8
Dependent Claim
20 words
The combination of claim 1 including first lost motion connectiOn means between said drive means and said rotatable output means.
Claim 9
Dependent Claim
46 words
The combination of claim 7 wherein said first lost motion connection means includes means for coupling said drive means with said rotatable output means, after a predetermined relative angular displacement of said rotatable drive means and said rotatable output means, to drive said rotatable output means.
Claim 10
Dependent Claim
38 words
The combination as set forth in claim 7 including second lost motion connecting means between said brake means and said rotatable output means to prevent rotation of the brake means until said brake means is in nonbraking position.
Claim 11
Dependent Claim
59 words
The combination as set forth in claim 7 wherein said brake mount means is coaxially received on said rotatable output means; said second lost motion connecting means including radially extending pin means, and said brake mount means including slot means receiving said pin means and permitting relative angular displacement of said rotatable output means and said brake mount means.
Claim 12
Dependent Claim
48 words
The combination as set forth in claim 1 wherein said brake mount means includes a hub mounted on the rotatable output means; said brake means includes a plurality of friction discs slidably mounted on said hub, and spring means is provided for biasing said friction discs into engagement.
Claim 13
Dependent Claim
48 words
The combination as set forth in claim 11 wherein said rolling means comprises a plurality of wheel members mounted for rotation about generally radially extending axes, and said rolling means receiving portion comprises a plurality of slots in an end face of said hub for receiving said wheels.
Claim 14
Dependent Claim
25 words
The combination as set forth in claim 1 including means for limiting the relative angular displacement between said brake mount means and said drive means.
Claim 15
Dependent Claim
26 words
The combination of claim 13 wherein said limiting means comprises means forming a lost motion connection between said rotatable output means and said brake mount means.
Claim 16
Dependent Claim
33 words
The combination of claim 13 wherein said means forming said lost motion connection comprises a radially extending pin on said rotatable output means, and a slot on said mount means receiving said pin.
Claim 17
Dependent Claim
172 words
Apparatus comprising: a housing; input drive means rotatably mounted in said housing; rotatable output means selectively drivable in either direction of rotation by said input drive means after an initial relative angular displacement therebetween; and bidirectional no-back apparatus for precluding rotation of said output means relative to said housing when said output means is not being driven by said input drive means including; a brake support member mounted on said output means for rotation relative thereto; braking means mounted on said brake support member for movement between a nonbraking position and a braking position when one of said brake support member and drive means is rotated relative to the other to prevent rotation of said rotatable output means in either direction; yieldable means for normally urging said braking means into said braking position; and cooperating means on said input drive means and said brake support member for moving said braking means to said nonbraking position when one of said brake support member and said drive means is rotated relative to the other.
Claim 18
Dependent Claim
172 words
Apparatus comprising: a housing; input drive means rotatably mounted in said housing; rotatable output means selectively drivable in either direction of rotation by said input drive means after an initial relative angular displacement therebetween; and bidirectional no-back apparatus for precluding rotation of said output means relative to said housing when said output means is not being driven by said input drive means including; a brake support member mounted on said output means for rotation relative thereto; braking means mounted on said brake support member for movement between a nonbraking position and a braking position when one of said brake support member and drive means is rotated relative to the other to prevent rotation of said rotatable output means in either direction; yieldable means for normally urging said braking means into said braking position; and cooperating means on said input drive means and said brake support member for moving said braking means to said nonbraking position when one of said brake support member and said drive means is rotated relative to the other.
Claim 19
Dependent Claim
54 words
Bidirectional drive apparatus as set forth in claim 16 wherein said cooperating means includes at least one roller rotatably mounted about a fixed pivot one one of said input drive means and brake support member and cooperating with roller-receiving means formed on the other of said input drive means and said brake support member.
Claim 20
Dependent Claim
37 words
Bidirectional drive apparatus as set forth in claim 16 including lost motion connecting means between said brake support member and said rotatable output means to permit relative rotation between said brake support member and said output means.
Claim 21
Dependent Claim
44 words
Bidirectional drive apparatus as set forth in claim 18 wherein said lost motion connecting means comprises a lug on one of said output means and said brake support member and lug-receiving means on the other of said output means and said brake support member.
Claim 22
Dependent Claim
157 words
In combination with rotatable output means; rotatable drive means coupled to said rotatable output means with a lost motion connection for selectively driving said rotatable output means in either direction of rotation; brake means coupled to said rotatable output means with a lost motion connection and being mounted for angular movement relative to said drive means, said brake means including means, movable from a nonbraking position to a braking position, for braking rotation of said rotatable output means in either direction when said brake means and said drive means are relatively angularly displaced and being returnable to said nonbraking position when said brake means and drive means are angularly returned; said output member and said brake means being relatively angularly displaced in said first direction in response to rotation of said output member by said drive means; and means responsive to rotation of the drive means in either direction for moving said brake means from braked position.
Claim 23
Dependent Claim
157 words
In combination with rotatable output means; rotatable drive means coupled to said rotatable output means with a lost motion connection for selectively driving said rotatable output means in either direction of rotation; brake means coupled to said rotatable output means with a lost motion connection and being mounted for angular movement relative to said drive means, said brake means including means, movable from a nonbraking position to a braking position, for braking rotation of said rotatable output means in either direction when said brake means and said drive means are relatively angularly displaced and being returnable to said nonbraking position when said brake means and drive means are angularly returned; said output member and said brake means being relatively angularly displaced in said first direction in response to rotation of said output member by said drive means; and means responsive to rotation of the drive means in either direction for moving said brake means from braked position.
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) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |