Patent US3724606A successfully refreshed from Google Patents.
US3724606A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disk brake assembly
Assignee: Aisin Corp
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Filing: 1971-03-29
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Granted: 1973-04-03
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Expires: 1991-03-29
Abstract
Abstract This invention relates to improvements in and relating to a disc brake assembly of the spot-acting type, especially for use with a powered vehicle such as automotive vehicle. More specifically, the invention relates to such a type of automotive brake unit, wherein a stationary brake cylinder having a pair of opposedly acting hydraulic pistons is positioned at one side of a rotatable brake disc and a movable plate is arranged as straddling said plate in a direction parallel to the axis of said disc when actuated upon by an indirectly acting type one of said pistons, while the other directly acting type piston is also being actuated. The improvement resides in such that said movable plate is mounted at its one end by at least two support lugs formed diametrally opposite to each other on said indirectly acting piston and suspendedly mounted from U-shaped guide pins mounted in turn on a body member of said brake unit, for load distribution and the like purposes.
Inventors
- 👤 T Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:40
CPC Classifications
F; F16; F16D; F16D55/00; F16D55/02; F16D55/22; F16D55/224; F16D55/225; F16D55/226; F16D55/2262; F16D2055/0004; F16D2055/0016; F16D2055/0025; F16D2055/007
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
185 words
A disk type wheel brake unit for a vehicle wheel comprising a brake disk rotatable in unison with a wheel to be braked, two movable friction pad units arranged at opposite sides of said brake disk for frictional cooperation therewith, a hydraulically operated cylinder unit having two oppositely actuatable hydraulic pistons movable relative thereto, means for stationarily mounting said cylinder unit at one side of said disk, and a ring-shaped transmission member straddling said disk, one of said pistons being slidably mounted therein, one of said friction units being in direct operative engagement with said one of said pistons and the other friction unit being in indirect operative engagement with the other hydraulic piston through said transmission member, said other hydraulic piston being slidably mounted on the external surface of said cylinder and having at least two outwardly extending diametrically opposed support lugs disposed adjacent the end of said other piston closest to said brake disk in the plane of said transmission member for engaging said transmission member at two widely spaced points so as to distribute the load applied to said ring-shaped transmission member.
Claim 2
Dependent Claim
185 words
A disk type wheel brake unit for a vehicle wheel comprising a brake disk rotatable in unison with a wheel to be braked, two movable friction pad units arranged at opposite sides of said brake disk for frictional cooperation therewith, a hydraulically operated cylinder unit having two oppositely actuatable hydraulic pistons movable relative thereto, means for stationarily mounting said cylinder unit at one side of said disk, and a ring-shaped transmission member straddling said disk, one of said pistons being slidably mounted therein, one of said friction units being in direct operative engagement with said one of said pistons and the other friction unit being in indirect operative engagement with the other hydraulic piston through said transmission member, said other hydraulic piston being slidably mounted on the external surface of said cylinder and having at least two outwardly extending diametrically opposed support lugs disposed adjacent the end of said other piston closest to said brake disk in the plane of said transmission member for engaging said transmission member at two widely spaced points so as to distribute the load applied to said ring-shaped transmission member.
Claim 3
Dependent Claim
66 words
A disk type brake unit as set forth in claim 1, wherein said cylinder unit is formed as a stepped cylinder having a larger diameter portion and a smaller diameter portion, said one of said pistons being slidably mounted within the larger diameter portion of said cylinder and said other piston being slidably mounted on the external surface of the smaller diameter portion of said cylinder.
Claim 4
Dependent Claim
60 words
A disk type brake unit as set forth in claim 2, wherein a plurality of guide pins are rigidly mounted on said cylinder unit and said friction pad units include backing plates, said backing plates being slidably mounted on said guide pins and further comprising suspension means suspended from said guide pins and rigidly secured to said ring-shaped transmission member.
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) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |