US3789735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diverter valve means for pressure differentially operated servomotor
Assignee: Bendix Corp
•
Filing: 1973-02-15
•
Granted: 1974-02-05
•
Expires: 1993-02-15
Abstract
Abstract A diverter valve for use in a vehicle having a power braking system operated by a pressure differential servomotor. The diverter valve directs air under pressure from an emission control pump to the servomotor in response to a signal generated upon actuation of the brake pedal to supply a first fluid under pressure which in conjunction with a second fluid creates the desired pressure differential in the servomotor.
Inventors
- 👤 G Tam
- 👤 D Gardner
- 👤 C Owens
- 👤 W Sisco
- 👤 F Grabb
- 👤 J Putt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:47
CPC Classifications
B; B60; B60T; B60T13/00; B60T13/10; B60T13/24; B60T13/46; B60T13/52; B60T13/66; B60T13/72; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86574; Y10T137/86582; Y10T137/8659; Y10T137/86622
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
264 words
A diverter valve means for use in a power braking system for directing a first fluid under pressure from a source to a servomotor in response to an actuation input, said servomotor being powered by an operational pressure differential created between the first fluid and a second fluid, said diverter valve means comprising: a housing having an inlet cHamber, an outlet chamber and a control chamber, said inlet chamber being connected to the first source of fluid, said housing having a first wall separating the inlet chamber from the outlet chamber, said first wall having an opening therein communicating the inlet chamber from the outlet chamber, said inlet chamber being connected to said servomotor, said outlet chamber being connected to a device operated by said first fluid; movable wall means separating said control chamber into a sensing chamber and a power chamber, said sensing chamber being in communication with said second fluid, said sensing chamber being connected to said power chamber by a passage to establish an equilibrium between the sensing chamber and the power chamber; piston means attached to said movable wall means preventing communication between said inlet chamber and said servomotor; and control means responsive to a signal developed upon initiating said actuation input for allowing air to enter said power chamber and develop a control pressure differential across said wall means with said second fluid, said control pressure differential moving said piston means to interrupt communication between said inlet chamber and said outlet chamber and allow the first fluid to be communicated to the servomotor for developing said operational pressure differential.
Claim 2
Dependent Claim
264 words
A diverter valve means for use in a power braking system for directing a first fluid under pressure from a source to a servomotor in response to an actuation input, said servomotor being powered by an operational pressure differential created between the first fluid and a second fluid, said diverter valve means comprising: a housing having an inlet cHamber, an outlet chamber and a control chamber, said inlet chamber being connected to the first source of fluid, said housing having a first wall separating the inlet chamber from the outlet chamber, said first wall having an opening therein communicating the inlet chamber from the outlet chamber, said inlet chamber being connected to said servomotor, said outlet chamber being connected to a device operated by said first fluid; movable wall means separating said control chamber into a sensing chamber and a power chamber, said sensing chamber being in communication with said second fluid, said sensing chamber being connected to said power chamber by a passage to establish an equilibrium between the sensing chamber and the power chamber; piston means attached to said movable wall means preventing communication between said inlet chamber and said servomotor; and control means responsive to a signal developed upon initiating said actuation input for allowing air to enter said power chamber and develop a control pressure differential across said wall means with said second fluid, said control pressure differential moving said piston means to interrupt communication between said inlet chamber and said outlet chamber and allow the first fluid to be communicated to the servomotor for developing said operational pressure differential.
Claim 3
Dependent Claim
97 words
The diverter valve means, as recited in claim 1, wherein said piston means includes: a stem attached to said movable wall means and extending through said outlet chamber into the inlet chamber; first poppet means attached to said stem for controlling communication between said inlet chamber and said outlet chamber; second poppet means attached to said stem for controlling communication between said inlet chamber and said servomotor; and resilient means associated with said stem for urging said second poppet means against a seat to allow the first fluid to be communicated between the inlet and outlet chambers.
Claim 4
Dependent Claim
63 words
The diverter valve means, as recited in claim 2 wherein said movable wall means includes: a plate secured to said stem having an orifice therein to form said passage; and a diaphragm having an outer periphery secured to said housing and an inner periphery secured to said plate, said diaphragm being flexible to move the stem in response to said control pressure differential.
Claim 5
Dependent Claim
66 words
The diverter valve means, as recited in claim 3, wherein said control means includes: solenoid means having a plunger which overlies and seals an opening in said power chamber, said solenoid being simultaneously energized by an electrical signal which activates a stoplight on a vehicle to move the plunger away from the opening and allow air to enter the power chamber to develop said control differential.
Claim 6
Dependent Claim
40 words
The diverter valve means, as recited in claim 4, wherein said housing further includes: a storage chamber connected to said inlet chamber for retaining a predetermined quantity of said first fluid to assure an operational supply for said first servomotor.
Claim 7
Dependent Claim
55 words
The diverter valve means, as recited in claim 5, wherein said housing further includes: check valve means located between said inlet chamber and said storage chamber to prevent backflow of said first fluid therebetween; and relief valve means connected to said storage chamber for limiting the quantity of said first fluid in the storage chamber.
Claim 8
Dependent Claim
48 words
The diverter valve means, as recited in claim 6, wherein said housing further includes: vent valve means connected to said storage chamber for allowing air to be communicated to said servomotor in the absence of said first fluid to develop said operational pressure differential with said second fluid.
Claim 9
Dependent Claim
30 words
The diverter valve means, as recited in claim 7, wherein said diverter valve means further includes: conduit means connected to said housing for communicating said storage chamber with the servomotor.
Claim 10
Dependent Claim
40 words
The diverter valve means, as recited in claim 8, wherein said conduit means includes: bellows means surrounding a push rod through which said actuation input is transmitted to the servomotor for preventing the first fluid from escaping into the atmosphere.
Claim 11
Dependent Claim
123 words
The diverter valve means, as recited in claim 9, wherein said bellows means includes: a cylindrical body having an outer periphery with a first rib thereon on one end and an inner periphery with a second rib thereon on the other end, said first rib being positioned in a first groove in a projection on the servomotor, said second rib being positioned in a second groove on said push rod; first clamp means surrounding said first end for retaining the first rib in the first groove; second clamp means surrounding said second end for retaining the second rib in the second groove; and a series of retainer means spaced on said cylindrical body to prevent said first fluid from radially expanding the same.
References Cited (Backward Citations)
US1103037A
Cited
US3434388A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |