US3659501A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-diaphragm vacuum servo
Assignee: Ford Motor Co
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Filing: 1970-03-03
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Granted: 1972-05-02
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Expires: 1990-03-03
Abstract
Abstract A vacuum controlled servo has two axially spaced flexible diaphragms each defining separate vacuum chambers, one diaphragm being connected to an actuator; the diaphragms are spring biased with the springs in parallel arrangement and one operatively located between the two; a number of adjustable stops permit varying actions of the diaphragms to vary and modulate the movement of the actuator as a function of the changes in pressure in the separate chambers.
Inventors
- 👤 Garry E Beard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:32
CPC Classifications
F; F02; F02P; F02P5/00; F02P5/04; F02P5/05; F02P5/10; F02P5/103
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
247 words
A fluid motor assembly comprising, a housing, a pair of flexible annular diaphragm members each mounted in said housing for an independent movement relative to the other and each with said housing defining a different vacuum chamber, means connecting each of said chambers to a separate source of fluid varying from a maximum essentially atmospheric pressure level to a minimum sub-atmospheric pressure or vacuum level for reciprocable movement of each of said members as a function of the changes in vacuum acting thereon, first spring means abutting said housing and biasing a first one of of said diaphragm members towards the other, second spring means including a spring operatively positioned between said members and biasing said members towards one another whereby movement of the first said member in one direction against the said first spring means effects an increasing biasing force by said spring on the other of said members to effect a movement of the said other of said members in said one direction, movable actuating means operatively connected to the other one of the said diaphragm members for movement therewith, and means on said latter other member of the said pair of diaphragm members operatively engagable at times with the said first one of said members upon movement of said other member in said one direction for limiting the movement of said other member in said one direction in a variable manner as a function of the position of the said one of said members.
Claim 2
Dependent Claim
247 words
A fluid motor assembly comprising, a housing, a pair of flexible annular diaphragm members each mounted in said housing for an independent movement relative to the other and each with said housing defining a different vacuum chamber, means connecting each of said chambers to a separate source of fluid varying from a maximum essentially atmospheric pressure level to a minimum sub-atmospheric pressure or vacuum level for reciprocable movement of each of said members as a function of the changes in vacuum acting thereon, first spring means abutting said housing and biasing a first one of of said diaphragm members towards the other, second spring means including a spring operatively positioned between said members and biasing said members towards one another whereby movement of the first said member in one direction against the said first spring means effects an increasing biasing force by said spring on the other of said members to effect a movement of the said other of said members in said one direction, movable actuating means operatively connected to the other one of the said diaphragm members for movement therewith, and means on said latter other member of the said pair of diaphragm members operatively engagable at times with the said first one of said members upon movement of said other member in said one direction for limiting the movement of said other member in said one direction in a variable manner as a function of the position of the said one of said members.
Claim 3
Dependent Claim
85 words
An assembly as in claim 1, including means mounting outer portions of said diaphragms to said housing in a manner axially spacing said diaphragms, said actuating means including an actuating rod secured at one end to said other diaphragm, means fixedly mounting the inner edge of said first diaphragm to a sleeve portion of said housing surrounding said rod, said second spring means being connected between said rod and said first diaphragm, whereby movement of either diaphragm effects a force transfer to the other diaphragm.
Claim 4
Dependent Claim
25 words
An assembly as in claim 2, including force transfer means secured to said first diaphragm and projecting into the path of movement of said rod.
Claim 5
Dependent Claim
34 words
An assembly as in claim 3, said force transfer means comprising a seat for one end of said spring, the other end of said spring being operatively seated against a portion of said rod.
Claim 6
Dependent Claim
28 words
An assembly as in claim 3, said force transfer means including further means engageable at times by said rod to restrict movement of said rod in one direction.
Claim 7
Dependent Claim
27 words
An assembly as in claim 4, including sleeve means axially adjustably mounted on said rod, said other end of said spring being seated against said sleeve means.
Claim 8
Dependent Claim
23 words
An assembly as in claim 5, said further means comprising a sleeve having an axially projecting hub engageable at times by said rod.
Claim 9
Dependent Claim
35 words
An assembly as in claim 3, including stop means secured to said housing and projecting into the path of movement of said force transfer means to limit movement of said first diaphragm in one direction.
Claim 10
Dependent Claim
56 words
An assembly as in claim 7, said rod including additional sleeve means axially adjustably mounted therein, said spring being seated between the sleeve means on said force transfer means and the sleeve means on said rod, adjustment of said rod sleeve means adjusting the preload of said spring and modulating the travel movements of said diaphragms.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |