Patent US3705641A successfully refreshed from Google Patents.
US3705641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disc brake
Assignee: Motors Liquidation Co
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Filing: 1971-01-20
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Granted: 1972-12-12
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Expires: 1991-01-20
Abstract
Abstract A disc brake for an automotive vehicle in which the caliper frame is made from a stamped steel plate and bent to form a Jsection, one leg of the caliper frame having a keyhole-shaped opening through which the cylinder body is mounted and retained in place by means of a flange and tang arrangement. The brake pad assemblies are provided with projections extending into recesses formed in the other caliper leg and in the hydraulic cylinder piston to locate the pad assemblies and hold them in position. The pad assembly backing plates have arms extending to embrace a portion of the caliper frame to further locate and limit movement of the brake pad assemblies and also to transmit brake torque to the caliper frame.
Inventors
- 👤 Frank W Brooks
- 👤 Norman L Gebhart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:16
CPC Classifications
F; F16; F16D; F16D55/00; F16D55/24; F16D55/26; F16D55/28; F16D55/32; F16D2055/0004; F16D2055/0062; F16D65/00; F16D65/02; F16D2065/13; F16D2065/134; F16D2065/1356; F16D2065/1364; F16D2125/00; F16D2125/02; F16D2125/14
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
325 words
In a disc brake for braking a rotating disc having oppositely facing braking surfaces, a caliper having a first leg juxtaposed to one braking surface of the disc and a second leg juxtaposed to the other braking surface of the disc, first and second brake pads each having a backing plate and a friction lining, said first brake pad being associated with said first caliper leg with the friction lining thereof adapted to engage the one braking surface of the disc and said second brake pad being associated with said second caliper leg with friction lining thereof adapted to engage the other braking surface of the disc, actuating means including a movable recessed member having an inner peripheral surface adjacent the recess opening and carried by said first caliper leg for actuating said first brake pad to bring its friction lining into braking engagement with the one braking surface of the brake disc and for effecting a reaction force bringing the friction lining of said second brake pad into braking engagement with the other braking surface of the brake disc, said first friction pad backing plate having a plurality of spaced projections thereon on the other side thereof from its friction lining, said projections being received in the recessed end of said recessed member and engaging said inner peripheral surface at arcuately spaced positions to locate said first friction pad and limit movement thereof relative to the recessed member in a plane parallel to the plane of rotation of the brake disc, said first friction pad backing plate further having arms extending from the ends thereof and forming a notch receiving said caliper for transmitting brake torque force to said caliper and further limiting movement of said first friction pad in a plane parallel to the plane of rotation of the brake disc, said arms also guiding the movements of said first friction pad relative to said caliper toward and away from the brake disc.
Claim 2
Dependent Claim
325 words
In a disc brake for braking a rotating disc having oppositely facing braking surfaces, a caliper having a first leg juxtaposed to one braking surface of the disc and a second leg juxtaposed to the other braking surface of the disc, first and second brake pads each having a backing plate and a friction lining, said first brake pad being associated with said first caliper leg with the friction lining thereof adapted to engage the one braking surface of the disc and said second brake pad being associated with said second caliper leg with friction lining thereof adapted to engage the other braking surface of the disc, actuating means including a movable recessed member having an inner peripheral surface adjacent the recess opening and carried by said first caliper leg for actuating said first brake pad to bring its friction lining into braking engagement with the one braking surface of the brake disc and for effecting a reaction force bringing the friction lining of said second brake pad into braking engagement with the other braking surface of the brake disc, said first friction pad backing plate having a plurality of spaced projections thereon on the other side thereof from its friction lining, said projections being received in the recessed end of said recessed member and engaging said inner peripheral surface at arcuately spaced positions to locate said first friction pad and limit movement thereof relative to the recessed member in a plane parallel to the plane of rotation of the brake disc, said first friction pad backing plate further having arms extending from the ends thereof and forming a notch receiving said caliper for transmitting brake torque force to said caliper and further limiting movement of said first friction pad in a plane parallel to the plane of rotation of the brake disc, said arms also guiding the movements of said first friction pad relative to said caliper toward and away from the brake disc.
Claim 3
Dependent Claim
300 words
In a disc brake for braking a rotating disc having oppositely facing braking surfaces, a caliper having a first leg juxtaposed to one braking surface of the disc and a second leg juxtaposed to the other braking surface of the disc, first and second brake pads each having a backing plate and a friction lining secured thereto, said first brake pad being associated with said first caliper leg with the friction lining thereof adapted to engage the one braking surface of the disc and said second brake pad being associated with said second caliper leg with friction lining thereof adapted to engage the other braking surface of the disc, actuating means including a movable recessed member carried by said first caliper leg for actuating said first brake pad to bring its friction lining into braking engagement with the one braking surface of the brake disc and for effecting a reaction force bringing the friction lining of said second brake pad into braking engagement with the other braking surface of the brake disc, said second friction pad backing plate having a plurality of spaced projections thereon on the other side thereof from its friction lining and said second caliper leg having a plurality of recesses formed therein and opening toward the other braking surface of the disc and receiving said projections therein to locate said second friction pad and limit translatory movement thereof relative to said caliper second leg in a plane parallel to the plane of rotation of the disc, said second friction pad backing plate further having arms extending from the ends thereof and forming a notch receiving said caliper for transmitting brake torque force to said caliper and further limiting movement of said second friction pad in a plane parallel to the plane of rotation of the disc.
Claim 4
Dependent Claim
300 words
In a disc brake for braking a rotating disc having oppositely facing braking surfaces, a caliper having a first leg juxtaposed to one braking surface of the disc and a second leg juxtaposed to the other braking surface of the disc, first and second brake pads each having a backing plate and a friction lining secured thereto, said first brake pad being associated with said first caliper leg with the friction lining thereof adapted to engage the one braking surface of the disc and said second brake pad being associated with said second caliper leg with friction lining thereof adapted to engage the other braking surface of the disc, actuating means including a movable recessed member carried by said first caliper leg for actuating said first brake pad to bring its friction lining into braking engagement with the one braking surface of the brake disc and for effecting a reaction force bringing the friction lining of said second brake pad into braking engagement with the other braking surface of the brake disc, said second friction pad backing plate having a plurality of spaced projections thereon on the other side thereof from its friction lining and said second caliper leg having a plurality of recesses formed therein and opening toward the other braking surface of the disc and receiving said projections therein to locate said second friction pad and limit translatory movement thereof relative to said caliper second leg in a plane parallel to the plane of rotation of the disc, said second friction pad backing plate further having arms extending from the ends thereof and forming a notch receiving said caliper for transmitting brake torque force to said caliper and further limiting movement of said second friction pad in a plane parallel to the plane of rotation of the disc.
Claim 5
Dependent Claim
148 words
A disc brake assembly comprising: a rotatable disc to be braked; a fixed support member; a caliper assembly including a substantially constant thickness stamped steel plate caliper frame, a brake actuator and friction pad assemblies; said caliper frame having a first leg mounted on said fixed support member and extending parallel to the plane of rotation of said disc on one side thereof, a second leg on the other side of said disc, and a bridging section joining said legs, said steel plate from which said frame was formed being bent at the junctions of said legs with said bridging section to provide arcuately shaped junctions, said first leg having a stamped opening formed therein receiving said actuator, and said friction pad assemblies being respectively mounted on said actuator and said second leg on opposite sides of said disc for braking engagement therewith when said actuator is actuated.
Claim 6
Dependent Claim
148 words
A disc brake assembly comprising: a rotatable disc to be braked; a fixed support member; a caliper assembly including a substantially constant thickness stamped steel plate caliper frame, a brake actuator and friction pad assemblies; said caliper frame having a first leg mounted on said fixed support member and extending parallel to the plane of rotation of said disc on one side thereof, a second leg on the other side of said disc, and a bridging section joining said legs, said steel plate from which said frame was formed being bent at the junctions of said legs with said bridging section to provide arcuately shaped junctions, said first leg having a stamped opening formed therein receiving said actuator, and said friction pad assemblies being respectively mounted on said actuator and said second leg on opposite sides of said disc for braking engagement therewith when said actuator is actuated.
Claim 7
Dependent Claim
111 words
A disc brake assembly having a rotatable disc to be braked, a fixed support member, and a brake caliper including a frame and an actuator and friction pad assemblies, said brake caliper frame being of generally J-shaped cross section defined by a pair of spaced legs and a bridging section joining said legs, and being formed from a steel stamping having a preformed opening in one leg for mounting a brake actuator and one friction pad assembly, the other leg of said frame having recesses therein opening toward said preformed opening for mounting another friction pad assembly, said frame having a substantially constant thickness throughout said legs and said bridging section.
Claim 8
Dependent Claim
111 words
A disc brake assembly having a rotatable disc to be braked, a fixed support member, and a brake caliper including a frame and an actuator and friction pad assemblies, said brake caliper frame being of generally J-shaped cross section defined by a pair of spaced legs and a bridging section joining said legs, and being formed from a steel stamping having a preformed opening in one leg for mounting a brake actuator and one friction pad assembly, the other leg of said frame having recesses therein opening toward said preformed opening for mounting another friction pad assembly, said frame having a substantially constant thickness throughout said legs and said bridging section.
Claim 9
Dependent Claim
100 words
In the disc brake assembly of claim 4, said actuator including a cup-shaped piston opening toward said other leg, and said friction pad assemblies having backing plates with a plurality of extensions formed on the back sides thereof, said one friction pad assembly extensions fitting within said cup shaped piston and engaging the inner periphery thereof and said other friction pad extensions fitting within said other leg recesses to mount said friction pad assemblies in position on opposite sides of said disc, said backing plates further having end extensions fitting said frame bridging section for transmitting brake torque forces thereto.
Claim 10
Dependent Claim
117 words
A disc brake caliper comprising: a caliper frame having parallel legs joined by a bridging section with one of said legs having a generally keyhole-shaped opening; a cylinder body having a flange surrounding one end which is open to receive a piston, and further having a tang formed thereon which extends outwardly and axially; said cylinder body fitting through the enlarged generally circular portion of said keyhole-shaped opening with said flange abutting said one leg and intermediate said legs for preventing movement of said cylinder away from the other of said legs and said tang fitting in the channel opening portion of said keyhole-shaped opening for preventing rotational movement of said cylinder relative to said one leg.
Claim 11
Dependent Claim
117 words
A disc brake caliper comprising: a caliper frame having parallel legs joined by a bridging section with one of said legs having a generally keyhole-shaped opening; a cylinder body having a flange surrounding one end which is open to receive a piston, and further having a tang formed thereon which extends outwardly and axially; said cylinder body fitting through the enlarged generally circular portion of said keyhole-shaped opening with said flange abutting said one leg and intermediate said legs for preventing movement of said cylinder away from the other of said legs and said tang fitting in the channel opening portion of said keyhole-shaped opening for preventing rotational movement of said cylinder relative to said one leg.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-12 | 1976-06-12 | 1976-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-12 | 1980-06-12 | 1980-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-12 | 1984-06-12 | 1984-12-12 | $7700.00 | Window Closed / Lapsed |