Patent US3858096A successfully refreshed from Google Patents.
Patent US3633462A successfully refreshed from Google Patents.
US3633462A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bypass orifice for hydraulic boost device
Assignee: Bendix Corp
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Filing: 1970-02-24
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Granted: 1972-01-11
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Expires: 1990-02-24
Abstract
Abstract A hydraulic boost device is disclosed which includes a housing having an inlet, an outlet, and a bore communicating the inlet with the outlet. A piston is slidable in a boost chamber which is provided in the housing in fluid communication with the bore. A stepped valve member having larger, smaller and intermediate radial portions is slidable in the bore from a first position in which substantially uninhibited flow of fluid is permitted between the inlet and the outlet to a second position in which the intermediate portion of the valve defines a metering orifice with the wall of the bore. In this position, a portion of the fluid is directed into the boost chamber to slide the piston and the rest of the fluid flows through the orifice to the outlet.
Inventors
- 👤 Edward J Goscenski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:17
CPC Classifications
C; C10; C10B; C10B21/00; C10B21/20; C10B21/22; B; B60; B60T; B60T13/00; B60T13/10; B60T13/12; B60T13/16; B60T13/161; B60T13/162; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86493; Y10T137/86879
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
207 words
In a hydraulic boost device: a housing having an inlet, an outlet, and a bore communicating the inlet with the outlet; a boost chamber in said housing in fluid communication with the bore; a piston slidable in said boost chamber; said bore being stepped to present larger and smaller radial portions; stepped valve means slidable in the larger and smaller radial portions of said bore; said valve means being slidable from a first position disposing the smaller portion of the valve in the smaller portion of the bore and the larger portion of the valve in the larger portion of the bore to permit substantially unhindered flow of fluid from the inlet to the outlet to a second position disposing a section the larger portion of said valve in the smaller portion of said bore in which position a portion of the fluid flow is directed into said boost chambEr for sliding said piston; said valve larger portion cooperating with said bore smaller portion to define an opening therebetween when said valve intermediate portion is disposed in said bore smaller portion whereby at least some of the fluid is permitted to flow from the inlet to the outlet when the valve means is in said second position.
Claim 2
Dependent Claim
207 words
In a hydraulic boost device: a housing having an inlet, an outlet, and a bore communicating the inlet with the outlet; a boost chamber in said housing in fluid communication with the bore; a piston slidable in said boost chamber; said bore being stepped to present larger and smaller radial portions; stepped valve means slidable in the larger and smaller radial portions of said bore; said valve means being slidable from a first position disposing the smaller portion of the valve in the smaller portion of the bore and the larger portion of the valve in the larger portion of the bore to permit substantially unhindered flow of fluid from the inlet to the outlet to a second position disposing a section the larger portion of said valve in the smaller portion of said bore in which position a portion of the fluid flow is directed into said boost chambEr for sliding said piston; said valve larger portion cooperating with said bore smaller portion to define an opening therebetween when said valve intermediate portion is disposed in said bore smaller portion whereby at least some of the fluid is permitted to flow from the inlet to the outlet when the valve means is in said second position.
Claim 3
Dependent Claim
206 words
In a hydraulic boost device: a housing having an inlet, an outlet, and a bore communicating the inlet with the outlet; a boost chamber in said housing in fluid communication with said bore; a piston slidable in said boost chamber; stepped valve means slidable in said bore presenting larger, smaller and intermediate radial portions; said valve means being shiftable from a first position in which substantially unhindered flow of fluid from the inlet to the outlet is permitted to a second position in which said valve intermediate portion cooperates with the wall of the bore to define a metering orifice therebetween to direct a portion of said fluid into said boost chamber to shift said piston, the remainder of the fluid flowing through said orifice to said outlet; said bore being stepped to establish larger and smaller diameter portions; said valve means in said first position disposing said larger portion of the valve means in said larger portion of the bore and said smaller portion of the valve means in the smaller portion of the bore, said valve means in said second position disposing at least part of said larger portion of the valve means in the smaller portion of the bore to establish said orifice.
Claim 4
Dependent Claim
206 words
In a hydraulic boost device: a housing having an inlet, an outlet, and a bore communicating the inlet with the outlet; a boost chamber in said housing in fluid communication with said bore; a piston slidable in said boost chamber; stepped valve means slidable in said bore presenting larger, smaller and intermediate radial portions; said valve means being shiftable from a first position in which substantially unhindered flow of fluid from the inlet to the outlet is permitted to a second position in which said valve intermediate portion cooperates with the wall of the bore to define a metering orifice therebetween to direct a portion of said fluid into said boost chamber to shift said piston, the remainder of the fluid flowing through said orifice to said outlet; said bore being stepped to establish larger and smaller diameter portions; said valve means in said first position disposing said larger portion of the valve means in said larger portion of the bore and said smaller portion of the valve means in the smaller portion of the bore, said valve means in said second position disposing at least part of said larger portion of the valve means in the smaller portion of the bore to establish said orifice.
References Cited (Backward Citations)
US2564896A
Cited
US3415282A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |