US3851567A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brake mechanism
Assignee: Individual
•
Filing: 1970-03-30
•
Granted: 1974-12-03
•
Expires: 1990-03-30
Abstract
Abstract Hydraulic brake apparatus including an actuator having a pair of spaced end portions, an endless sidewall extending between the end portions, and at least one inelastically deformable corrugation formed in the side wall that tends to flatten out inelastically when the actuator is forced to extend and thus increase the space between the end portions, the inelastic deformation of the corrugation preventing the actuator from rebounding elastically to its original length when the extending force is removed.
Inventors
- 👤 T Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:20
CPC Classifications
F; F16; F16J; F16J3/00; F16J3/06; B; B60; B60T; B60T11/00; B60T11/10; B60T11/16; F16D; F16D55/00; F16D55/02; F16D55/22; F16D55/228; F16D65/00; F16D65/14; F16D65/38; F16D65/40; F16D65/52; F16D65/54; F16D65/543
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
350 words
Hydraulic brake apparatus comprising: a housing having a cavity formed therein with a closed end and an open end; a port in said closed end for connection with a source of fluid pressure; a fluid pressure transmitting member mounted in said cavity and forming with said cavity a fluid pressure chamber, said fluid pressure transmitting member comprising a metallic cup-like actuator having an open end portion and a closed end portion spaced from and movable with respect to each other; said actuator having mounting flange means secured to the open end portion thereof; means defining a mounting groove in said housing receiving said mounting flange means; static, resilient sealinG means between the surfaces of said mounting groove and said mounting flange; said flange means compressing said sealing means between the surfaces of said mounting flange means and mounting groove to form a static, fluidtight seal between the actuator and the closed end of the cavity such that the open end portion of the metallic actuator is secured to the cavity in fixed, fluid tight relationship with respect to the closed end of the cavity and the closed end portion of the metallic actuator defines a fluid pressure responsive movable wall for said chamber and is operable to apply braking pressure when fluid pressure is applied to said chamber from said source; said open and closed end portions of said metallic actuator being spaced from each other by an endless side wall extending therebetween; said side wall being formed with a deformable corrugated metallic segment for changing the length of the side wall and hence the spacing between said open and closed end portions, said corrugated segment being plastically deformable in response to the application of fluid pressure to said chamber to prevent the side wall from returning to its original length when the fluid pressure is subsequently relaxed so that the relaxed length of the metallic actuator changes progressively with the successive application and relaxation of fluid pressure to said chamber; said metallic actuator being statically sealed only to said housing and being free of any sliding sealing relationship therewith.
Claim 2
Dependent Claim
350 words
Hydraulic brake apparatus comprising: a housing having a cavity formed therein with a closed end and an open end; a port in said closed end for connection with a source of fluid pressure; a fluid pressure transmitting member mounted in said cavity and forming with said cavity a fluid pressure chamber, said fluid pressure transmitting member comprising a metallic cup-like actuator having an open end portion and a closed end portion spaced from and movable with respect to each other; said actuator having mounting flange means secured to the open end portion thereof; means defining a mounting groove in said housing receiving said mounting flange means; static, resilient sealinG means between the surfaces of said mounting groove and said mounting flange; said flange means compressing said sealing means between the surfaces of said mounting flange means and mounting groove to form a static, fluidtight seal between the actuator and the closed end of the cavity such that the open end portion of the metallic actuator is secured to the cavity in fixed, fluid tight relationship with respect to the closed end of the cavity and the closed end portion of the metallic actuator defines a fluid pressure responsive movable wall for said chamber and is operable to apply braking pressure when fluid pressure is applied to said chamber from said source; said open and closed end portions of said metallic actuator being spaced from each other by an endless side wall extending therebetween; said side wall being formed with a deformable corrugated metallic segment for changing the length of the side wall and hence the spacing between said open and closed end portions, said corrugated segment being plastically deformable in response to the application of fluid pressure to said chamber to prevent the side wall from returning to its original length when the fluid pressure is subsequently relaxed so that the relaxed length of the metallic actuator changes progressively with the successive application and relaxation of fluid pressure to said chamber; said metallic actuator being statically sealed only to said housing and being free of any sliding sealing relationship therewith.
Claim 3
Dependent Claim
27 words
Hydraulic brake apparatus as claimed in claim 1, wherein said mounting flange means comprises a separate mounting member attached to the open end portion of said actuator.
Claim 4
Dependent Claim
18 words
Hydraulic brake apparatus as claimed in claim 1 wherein said sidewall further includes a layer of elastomeric material.
Claim 5
Dependent Claim
39 words
Hydraulic brake apparatus as claimed in claim 1 further including means defining a radial supporting wall concentric with said sidewall, and elastomeric material interposed between said sidewall and said radial supporting wall providing yieldable radial support for said sidewall.
Claim 6
Dependent Claim
19 words
Apparatus as claimed in claim 4 wherein said means secured to said open end portion includes a sleeve member.
Claim 7
Dependent Claim
44 words
Hydraulic brake apparatus as claimed in claim 5 wherein said groove is adjacent to and spaced inwardly from the open end of said cavity, said one end of said sleeve member being located on the opposite side of said groove from said open end.
Claim 8
Dependent Claim
26 words
Hydraulic brake apparatus as claimed in claim 6 further including a piston reciprocable in said cavity and engaged with said closed end portion of said actuator.
Claim 9
Dependent Claim
38 words
Hydraulic brake apparatus as claimed in claim 7 wherein said piston is formed with an end cavity surrounded by a skirt concentric with said sidewall, and at least a portion of said actuator extends into said end cavity.
Claim 10
Dependent Claim
21 words
Hydraulic brake apparatus as claimed in claim 8 wherein said skirt is received between the actuator sidewall and said sleeve member.
Claim 11
Dependent Claim
35 words
Hydraulic brake apparatus as claimed in claim 9 wherein said piston has an enlarged outer end portion forming an annular shoulder engageable with said flange means to facilitate installation of said sleeve in said chamber.
Claim 12
Dependent Claim
53 words
Hydraulic brake apparatus as claimed in claim 10 wherein the sidewall of said actuator is formed with a plurality of corrugations, and further including a series of semirigid plastic discs received in said actuator having rounded edges forming annular ridge portions for internally supporting similar ridge portions of the corrugations of said actuator.
Claim 13
Dependent Claim
49 words
Hydraulic brake apparatus as claimed in claim 1 wherein the sidewall of said actuator is formed with a plurality of corrugations, and further including a series of semirigid discs received in said actuator having rounded edges forming annular ridge portions for internally supporting similar ridge portions of said corrugations.
Claim 14
Dependent Claim
13 words
Hydraulic brake apparatus as claimed in claim 1 wherein said sidewall is circular.
Claim 15
Dependent Claim
223 words
An actuator unit adapted for installation in a bore having a front opening, a continuous sidewall having a groove spaced inwardly from said opening with a packing ring in said groove, and port means in said bore connectable to a source of fluid pressure, said unit comprising: a bellows-like cup member of plastically yieldable material with a convoluted sidewall having a series of annular ridge portions separated by indentations including a plurality of randomly spaced apart and substantially axially extending wrinkles within said indentations, and a flat transverse endwall integral with said sidewall; disc means having rounded edges for internally supporting said ridge portions of said cup member; a sleeve fixed to said cup member at one end and having an outwardly extending flange at its other end projecting into said groove; a piston having a bearing face at one end and a cavity at its other end forming a wall positioned between said cup member and said sleeve; and a layer of elastomeric material between the inner surface of said piston wall and said convolutions of said cup member, whereby fluid pressure supplied to said bore through said port causes said sidewall of said cup member to plastically deform and move said piston axially and said elastomeric material causes a predetermined amount of cup member return when said fluid pressure is reduced.
Claim 16
Dependent Claim
223 words
An actuator unit adapted for installation in a bore having a front opening, a continuous sidewall having a groove spaced inwardly from said opening with a packing ring in said groove, and port means in said bore connectable to a source of fluid pressure, said unit comprising: a bellows-like cup member of plastically yieldable material with a convoluted sidewall having a series of annular ridge portions separated by indentations including a plurality of randomly spaced apart and substantially axially extending wrinkles within said indentations, and a flat transverse endwall integral with said sidewall; disc means having rounded edges for internally supporting said ridge portions of said cup member; a sleeve fixed to said cup member at one end and having an outwardly extending flange at its other end projecting into said groove; a piston having a bearing face at one end and a cavity at its other end forming a wall positioned between said cup member and said sleeve; and a layer of elastomeric material between the inner surface of said piston wall and said convolutions of said cup member, whereby fluid pressure supplied to said bore through said port causes said sidewall of said cup member to plastically deform and move said piston axially and said elastomeric material causes a predetermined amount of cup member return when said fluid pressure is reduced.
Claim 17
Dependent Claim
51 words
The actuator unit of claim 14 wherein said piston has a head portion with a diameter substantially equal to that of said sleeve flange and a body portion of a reduced diameter thereby forming a shoulder which engages said sleeve flange during the installation of said actuator unit in a bore.
Claim 18
Dependent Claim
224 words
An actuator unit adapted for installation in groove, bore having a front opening, a continuous sidewall having a groove spaced inwardly from said opening with a packing ring in said groove, and port means in said bore connectable to a source of fluid pressure, said unit comprising: a bellows-like cup member of plastically yieldable material with a convoluted sidewall having a series of annular ridge portions separated by indentations including a plurality of randomly spaced apart and substantially axially extending wrinkles, and a flat transverse endwall integral with said sidewall; an annular snap ring fixed to said cup member at its open end and seated within said groove thereby retaining and sealing said unit within said bore; a piston bearing against said end wall, said piston having an outer bearing face at its head end and an extended cylindrical portion at its other end being in concentric, telescopic relationship with said cup member and bearing against its endwall; and a layer of elastomeric material between the inner surface of said extended piston portion and said convolutions of said cup member, whereby fluid pressure supplied to said bore through said port causes said sidewall of said cup member to plastically deform and move said piston axially while said elastomeric material causes a predetermined small amount of cup member return when said fluid pressure is reduced.
Claim 19
Dependent Claim
224 words
An actuator unit adapted for installation in groove, bore having a front opening, a continuous sidewall having a groove spaced inwardly from said opening with a packing ring in said groove, and port means in said bore connectable to a source of fluid pressure, said unit comprising: a bellows-like cup member of plastically yieldable material with a convoluted sidewall having a series of annular ridge portions separated by indentations including a plurality of randomly spaced apart and substantially axially extending wrinkles, and a flat transverse endwall integral with said sidewall; an annular snap ring fixed to said cup member at its open end and seated within said groove thereby retaining and sealing said unit within said bore; a piston bearing against said end wall, said piston having an outer bearing face at its head end and an extended cylindrical portion at its other end being in concentric, telescopic relationship with said cup member and bearing against its endwall; and a layer of elastomeric material between the inner surface of said extended piston portion and said convolutions of said cup member, whereby fluid pressure supplied to said bore through said port causes said sidewall of said cup member to plastically deform and move said piston axially while said elastomeric material causes a predetermined small amount of cup member return when said fluid pressure is reduced.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |