Patent US3907074A successfully refreshed from Google Patents.
US3907074A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mechanically operated disc-brakes
Assignee: Valeo SE
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Filing: 1973-07-30
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Granted: 1975-09-23
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Expires: 1993-07-30
Abstract
Abstract The present invention relates to mechanically-operated discbrakes of the kind comprising a disc fast for rotation with the member to be braked, a fixed support, two brake-shoes disposed respectively on each side of the disc and movably mounted perpendicularly to the plane of the disc, two operating levers adapted to co-operate with a first the brake-shoe by a cam surface, a transfer member carrying the operating levers, the member being movable with respect to the disc for the transmission to the second the brake-shoe of the force applied by the levers, and a traction cable coupled to one of the operating levers, the cable being enclosed by a sheath in abutment against the other the operating lever, the disc-brake being characterized in that the operating levers are articulated on a core member carried by the transfer member and pivotally mounted with respect to the transfer member. The brakes according to the invention have improved braking efficiency and smaller overall size as compared with known brakes of comparable types.
Inventors
- 👤 Michel Rist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:06
CPC Classifications
F; F16; F16D; F16D65/00; F16D65/38; F16D65/40; F16D65/42; F16D65/46; F16D55/00; F16D55/02; F16D55/22; F16D55/224; F16D55/225; F16D55/226; F16D55/2262; F16D65/14; F16D65/16; F16D65/18; F16D65/52; F16D65/56; F16D65/567; F16D2055/0004; F16D2055/0041; F16D2121/00; F16D2121/14; F16D2125/00; F16D2125/18; F16D2125/20; F16D2125/22; F16D2125/28; F16D2125/32; F16D2125/58; F16D2125/60
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
213 words
A parking type disc brake comprising a disc mounted for rotation with a member to be braked, a fixed support, a brakeshoe mounted relative to the fixed support on each side of said disc for movement perpendicular to the plane of said disc, a pair of operating levers having cam means in rolling contact with a first one of said brakeshoes for applying braking force thereon, a traction cable coupled to one of said operating levers, a sheath surrounding the cable and in abutment against the other of said operating levers, a transfer member mounted for movement with respect to said disc for transmitting braking force to the second brakeshoe, a core member pivotally mounting said pair of operating levers about a first axis, and means pivotally mounting said core member on said transfer member about a second axis which is transverse to said disc and to said first axis and to said cable, said operating levers being pivoted at points spaced along said first axis on opposite sides of said second axis, whereby in response to pivotal movement of said operating levers about said first axis, said core member pivots about said second axis thereby enabling rolling contact of said cam means on said first brakeshoe while applying the braking force thereto.
Claim 2
Dependent Claim
213 words
A parking type disc brake comprising a disc mounted for rotation with a member to be braked, a fixed support, a brakeshoe mounted relative to the fixed support on each side of said disc for movement perpendicular to the plane of said disc, a pair of operating levers having cam means in rolling contact with a first one of said brakeshoes for applying braking force thereon, a traction cable coupled to one of said operating levers, a sheath surrounding the cable and in abutment against the other of said operating levers, a transfer member mounted for movement with respect to said disc for transmitting braking force to the second brakeshoe, a core member pivotally mounting said pair of operating levers about a first axis, and means pivotally mounting said core member on said transfer member about a second axis which is transverse to said disc and to said first axis and to said cable, said operating levers being pivoted at points spaced along said first axis on opposite sides of said second axis, whereby in response to pivotal movement of said operating levers about said first axis, said core member pivots about said second axis thereby enabling rolling contact of said cam means on said first brakeshoe while applying the braking force thereto.
Claim 3
Dependent Claim
17 words
A disc brake according to claim 1, said first and second axes being perpendicular to each other.
Claim 4
Dependent Claim
20 words
A disc brake as claimed in claim 2, wherein the second axis is parallel to the axis of said disc.
Claim 5
Dependent Claim
48 words
A disc brake according to claim 1, wherein the cam means includes one cam surface on each of said operating levers, said cam surfaces viewed in the plane of said transfer member being located directly opposite the portion of said second brakeshoe in engagement with the transfer member.
Claim 6
Dependent Claim
44 words
A disc brake as claimed in claim 1, wherein said first axis is, in the rest position, substantially parallel to the radial direction of said disc viewed in the central longitudinal plane of said transfer member and perpendicular to the axis of said disc.
Claim 7
Dependent Claim
44 words
A disc brake as claimed in claim 1, wherein said second axis is, in the rest position, substantially perpendicular to the radial direction of said disc viewed in the central longitudinal plane of said transfer member and perpendicular to the plane of said disc.
Claim 8
Dependent Claim
32 words
A disc brake as claimed in claim 6, and a finger on said core member and abutting against said transfer member in order to define the rest position of said core member.
Claim 9
Dependent Claim
36 words
A disc brake as claimed in claim 6, wherein each of said operating levers carries a finger that comes into abutment against the associated core member in order to define the rest position of said lever.
Claim 10
Dependent Claim
80 words
A disc brake as claimed in claim 6, wherein said means for pivotally mounting said core member comprises a pin mounted on said core member and disposed in a sleeve carried by said transfer member and further comprising a ratchet wheel associated with said sleeve, said ratchet wheel having teeth engaging with a pawl, said pawl being mounted rotatably on said core member, and resilient means urging said pawl against a driving abutment formed on one of said operating levers.
Claim 11
Dependent Claim
43 words
A disc brake as claimed in claim 9, further comprising a hood, the closed end of said hood abutting said pin on said core, said hood being screwed on said sleeve remote from said transfer member and being integral with said ratchet wheel.
Claim 12
Dependent Claim
39 words
A disc brake as claimed in claim 10, wherein said pin is divided into at least two separate sections mounted end-to-end inside said sleeve, said divided pin abutting against the closed end of said hood screwed on said sleeve.
Claim 13
Dependent Claim
17 words
A disc brake as claimed in claim 9, wherein said sleeve is integral with said transfer member.
Claim 14
Dependent Claim
25 words
A disc brake as claimed in claim 9, wherein said sleeve is fixed on said transfer member and is locked against rotation on said member.
Claim 15
Dependent Claim
30 words
A disc brake as claimed in claim 9, wherein said resilient means comprises a torsion spring having one arm engaging said pawl, another arm being supported on said transfer member.
Claim 16
Dependent Claim
28 words
A disc brake as claimed in claim 14, wherein the extremity of said other arm of said torsion spring is disposed in a groove in said transfer member.
Claim 17
Dependent Claim
27 words
A disc brake as claimed in claim 14, wherein said one arm of said torsion spring carries a roller device having an annular groove engaging said pawl.
Claim 18
Dependent Claim
32 words
A disc brake as claimed in claim 14, wherein said torsion spring has a torsion zone which is received on a pin carried by said core member for pivotally mounting operating levers.
Claim 19
Dependent Claim
39 words
A disc brake as claimed in claim 9, wherein the extremity of said pawl cooperating with the teeth of said ratchet wheel is oblique in the rest position of said ratchet wheel, in a plane parallel to said pin.
Claim 20
Dependent Claim
54 words
A disc brake as claimed in claim 9, further comprising an elastic ring around the sleeve in which the pivotal pin of said core member is rotatably mounted, between said transfer member and said ratchet wheel engaged by screwing on to said sleeve, said ring having a flat surface bearing against said ratchet wheel.
Claim 21
Dependent Claim
25 words
A disc brake as claimed in claim 1, wherein the pivotal mounting of said operating levers comprises a cylindrical pin carried by said core member.
Claim 22
Dependent Claim
43 words
A disc brake as claimed in claim 20, wherein one of the ends of said cylindrical pin is disposed in a groove in said transfer member, one of the flanks of said groove comprising an abutment defining a rest position of said pin.
Claim 23
Dependent Claim
33 words
A disc brake as claimed in claim 1, wherein said transfer member is generally ring shaped extending around said fixed support, said disc and said brakeshoes, parallel to a chord of said disc.
Claim 24
Dependent Claim
30 words
A disc brake as claimed in claim 1, wherein said transfer member comprises a U-shaped stirrup substantially radially disposed on each side of said disc and of said fixed support.
Claim 25
Dependent Claim
59 words
A disc brake as claimed in claim 23, wherein said stirrup is provided with two oblique flats on its edges substantially perpendicular to said disc converging from the axis of said disc, a first one of said flats bearing against a third flat on said fixed support, the second flat supporting a retention spring carried by said fixed support.
Claim 26
Dependent Claim
47 words
A disc brake as claimed in claim 24, wherein said retention spring is a torsion spring, one of the arms of said spring being keyed to said fixed support and the other arm of said spring bearing on one said oblique flat associated with said transfer member.
Claim 27
Dependent Claim
47 words
A disc brake as claimed in claim 24, wherein said retention spring is a U-shaped spring of round wire, the central portion of said spring being supported on said one of said oblique flats, the two arms of said spring being in abutment against said fixed support.
Claim 28
Dependent Claim
59 words
A disc brake as claimed in claim 24, wherein said retention spring comprises a leaf spring, one end of said leaf spring being supported on a holding pin on said fixed support, the central zone of said holding pin being directly carried by said fixed support and acting at its other end on said one of said oblique flats.
Claim 29
Dependent Claim
73 words
A disc brake as claimed in claim 1, further comprising a cylindircal ring member disposed around the traction cable between said operating levers and close to at least one of said levers, said cylindrical ring member being supported at one end against said operating lever and at the other end carrying a scraper joint in engagement with said traction cable, and a restoring spring mounted between said operating levers, around said ring member.
Claim 30
Dependent Claim
51 words
A disc brake as claimed in claim 1, wherein at least one of said brakeshoes is disposed in an opening in said fixed support and has two laterally extending lugs disposed in slots communicating with said opening, said slots having a width substantially greater than the corresponding length of said lugs.
Claim 31
Dependent Claim
13 words
A disc brake as claimed in claim 29, wherein said support is bracket-shaped.
Claim 32
Dependent Claim
34 words
A disc brake as claimed in claim 1, wherein said fixed support comprises a U-shaped member extending substantially radially on each side of said disc, said fixed support having two openings receiving said brakeshoes.
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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) | 1978-09-22 | 1979-03-24 | 1979-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-22 | 1983-03-24 | 1983-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-22 | 1987-03-24 | 1987-09-23 | $7700.00 | Window Closed / Lapsed |