Patent US3900089A successfully refreshed from Google Patents.
US3900089A
Expired / Lapsed
US
⏱️ 0.0 years remaining
One way fluid operated coupling
Assignee: Borg Warner Corp
•
Filing: 1974-06-21
•
Granted: 1975-08-19
•
Expires: 1994-06-21
Abstract
Abstract A directionally sensitive control mechanism for a friction engaging device, for example a brake mechanism, adapted to be used in an automatic transmission wherein automatic ratio changes are to be made. The directionally sensitive control mechanism comprises an hydraulic motor having a piston with a fluid chamber on one side thereof which is adapted to engage the friction device. The control mechanism includes a lever and ball mounted in a pocket in the piston on the opposite side thereof from said chamber. The ball is in contact with a rotatable friction plate of the device and with said lever, said lever being in contact with said check valve; whereby when the piston moves to engage the friction device, in one direction of relative rotation between said plate and said piston, said ball will hold said lever in a position to keep open said check valve so that the brake cannot be fully engaged until the direction of relative rotation reverses.
Inventors
- 👤 John S Ivey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:16
CPC Classifications
F; F16; F16D; F16D65/00; F16D65/14; F16D65/16; F16D25/00; F16D25/06; F16D25/062; F16D25/063; F16D25/0635; F16D25/0638; F16D43/00; F16D43/28
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
122 words
A control mechanism for an hydraulic motor for a friction engaging device including a piston member, a cylinder member receiving said piston, said piston and cylinder defining a fluid chamber, a valve in one of said members, fluid pressure in said chamber acting to close said valve, an actuator for said valve, rotatable means in said friction engaging device having relative rotation with respect to one of said members, one part of said actuator being in contact with said rotatable means, and a second part of said actuator having contact with said valve whereby in one direction of said relative rotation said valve will be opened by said actuator and in the other direction of relative rotation said valve will remain closed.
Claim 2
Dependent Claim
122 words
A control mechanism for an hydraulic motor for a friction engaging device including a piston member, a cylinder member receiving said piston, said piston and cylinder defining a fluid chamber, a valve in one of said members, fluid pressure in said chamber acting to close said valve, an actuator for said valve, rotatable means in said friction engaging device having relative rotation with respect to one of said members, one part of said actuator being in contact with said rotatable means, and a second part of said actuator having contact with said valve whereby in one direction of said relative rotation said valve will be opened by said actuator and in the other direction of relative rotation said valve will remain closed.
Claim 3
Dependent Claim
17 words
A control mechanism as claimed in claim 1 wherein said valve is mounted in said piston member.
Claim 4
Dependent Claim
17 words
A control mechanism as claimed in claim 1 wherein said rotatable means comprises a rotatable friction plate.
Claim 5
Dependent Claim
15 words
A control mechanism as claimed in claim 1 wherein said one part is a ball.
Claim 6
Dependent Claim
120 words
A control mechanism for an hydraulic motor for a friction brake including a piston, a cylinder receiving said piston, said piston and cylinder defining a fluid chamber, a check valve in said piston, fluid pressure in said chamber acting to close said check valve, an actuator for said check valve, at least one friction plate in said brake having relative rotation with respect to said piston, one part of said actuator being in contact with said plate, and a second part of said actuator having contact with said check valve whereby in one direction of relative rotation said check valve will be opened by said actuator and in the other direction of relative rotation said check valve will remain closed.
Claim 7
Dependent Claim
120 words
A control mechanism for an hydraulic motor for a friction brake including a piston, a cylinder receiving said piston, said piston and cylinder defining a fluid chamber, a check valve in said piston, fluid pressure in said chamber acting to close said check valve, an actuator for said check valve, at least one friction plate in said brake having relative rotation with respect to said piston, one part of said actuator being in contact with said plate, and a second part of said actuator having contact with said check valve whereby in one direction of relative rotation said check valve will be opened by said actuator and in the other direction of relative rotation said check valve will remain closed.
Claim 8
Dependent Claim
22 words
A control mechanism as claimed in claim 5 wherein said piston has a pocket formed therein in which said actuator is carried.
Claim 9
Dependent Claim
22 words
A control mechanism as claimed in claim 6 wherein said one part is a ball and said second part is a lever.
Claim 10
Dependent Claim
179 words
A directionally sensitive control mechanism for an hydraulic motor for a friction brake including a piston, a cylinder receiving said piston, said piston and cylinder defining a fluid chamber, a check valve in said piston in communication with said chamber, fluid pressure in said chamber acting to close said check valve, an actuator for said check valve comprising a ball and lever carried in a pocket in said piston, said check valve adapted to connect said chamber to said pocket when open, said brake including at least one friction plate having relative rotation with respect to said piston, said ball being in contact with said friction plate, said lever having contact with said check valve whereby in one direction of relative rotation between said piston and said plate said check valve will be opened by said lever and in the other direction of relative rotation said check valve will remain closed, whereby under certain conditions of relative rotation said brake cannot be fully engaged until the direction of relative rotation is reversed providing a smooth engagement of said brake.
Claim 11
Dependent Claim
179 words
A directionally sensitive control mechanism for an hydraulic motor for a friction brake including a piston, a cylinder receiving said piston, said piston and cylinder defining a fluid chamber, a check valve in said piston in communication with said chamber, fluid pressure in said chamber acting to close said check valve, an actuator for said check valve comprising a ball and lever carried in a pocket in said piston, said check valve adapted to connect said chamber to said pocket when open, said brake including at least one friction plate having relative rotation with respect to said piston, said ball being in contact with said friction plate, said lever having contact with said check valve whereby in one direction of relative rotation between said piston and said plate said check valve will be opened by said lever and in the other direction of relative rotation said check valve will remain closed, whereby under certain conditions of relative rotation said brake cannot be fully engaged until the direction of relative rotation is reversed providing a smooth engagement of said brake.
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) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |