Patent US3887042A successfully refreshed from Google Patents.
US3887042A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston and extensible cylinder therefor
Assignee: Bendix Corp
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Filing: 1974-07-22
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Granted: 1975-06-03
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Expires: 1994-07-22
Abstract
Abstract A fluid pressure actuated piston is slidably carried in a fluid pressure actuated cylinder which, in turn, is slidably carried in a fixed carrier and engageable with a stop which stop is defined by a plurality of balls arranged in a column between a fixed retaining member and the cylinder and contained by a cylinder slidable relative thereto. The ball-containing cylinder is surrounded by the piston which is provided with axially spaced apart abutments one of which is engageable with the ballcontaining cylinder during an extension stroke of the piston thereby displacing the cylinder relative to the column of balls thereby releasing one or more of the balls from the column whereupon the fluid pressure actuated cylinder is urged axially toward the piston and into engagement with the remaining column of balls. Release of all of the balls results in engagement of the ball-containing cylinder with the fixed retaining member thereby extending the range of travel of the piston accordingly.
Inventors
- 👤 Richard J Ditlinger
- 👤 Richard W Kerr
- 👤 Lyle E Massing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:05
CPC Classifications
F; F16; F16D; F16D65/00; F16D65/38; F16D65/40; F16D65/52; F16D65/54; F16D55/00; F16D55/24; F16D55/26; F16D55/36; F16D55/40; F16D2055/0004; F16D2055/0058
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
202 words
Extensible fluid pressure actuated apparatus including a piston slidably carried in a cylinder for a multiple disc aircraft disc brake provided with fixed piston carrier means providing limited axial travel for the piston carried thereby, said fluid pressure actuated apparatus comprising: a controlled source of pressurized fluid; a fluid pressure responsive cylinder slidably carried in said carrier means and having an end wall; a fluid pressure responsive pisTon slidably carried in said cylinder; passage means communicating said cylinder and said piston with said pressurized fluid; a fixed retaining member having an axially spaced apart relationship with said end wall and engageable therewith; stop means including a plurality of spherical members arranged in column form and interposed between said fixed stop member and said end wall whereby the axial position of said end wall relative to said retaining member is dependent upon the number of spherical members in said column; and means operatively connecting said piston and said stop means for displacing one or more of said spherical members from said column in response to axial movement of said piston away from said end wall to permit said cylinder to axially follow said piston under the influence of said pressurized fluid acting thereagainst.
Claim 2
Dependent Claim
202 words
Extensible fluid pressure actuated apparatus including a piston slidably carried in a cylinder for a multiple disc aircraft disc brake provided with fixed piston carrier means providing limited axial travel for the piston carried thereby, said fluid pressure actuated apparatus comprising: a controlled source of pressurized fluid; a fluid pressure responsive cylinder slidably carried in said carrier means and having an end wall; a fluid pressure responsive pisTon slidably carried in said cylinder; passage means communicating said cylinder and said piston with said pressurized fluid; a fixed retaining member having an axially spaced apart relationship with said end wall and engageable therewith; stop means including a plurality of spherical members arranged in column form and interposed between said fixed stop member and said end wall whereby the axial position of said end wall relative to said retaining member is dependent upon the number of spherical members in said column; and means operatively connecting said piston and said stop means for displacing one or more of said spherical members from said column in response to axial movement of said piston away from said end wall to permit said cylinder to axially follow said piston under the influence of said pressurized fluid acting thereagainst.
Claim 3
Dependent Claim
202 words
Extensible fluid pressure actuated apparatus including a piston slidably carried in a cylinder for a multiple disc aircraft disc brake provided with fixed piston carrier means providing limited axial travel for the piston carried thereby, said fluid pressure actuated apparatus comprising: a controlled source of pressurized fluid; a fluid pressure responsive cylinder slidably carried in said carrier means and having an end wall; a fluid pressure responsive pisTon slidably carried in said cylinder; passage means communicating said cylinder and said piston with said pressurized fluid; a fixed retaining member having an axially spaced apart relationship with said end wall and engageable therewith; stop means including a plurality of spherical members arranged in column form and interposed between said fixed stop member and said end wall whereby the axial position of said end wall relative to said retaining member is dependent upon the number of spherical members in said column; and means operatively connecting said piston and said stop means for displacing one or more of said spherical members from said column in response to axial movement of said piston away from said end wall to permit said cylinder to axially follow said piston under the influence of said pressurized fluid acting thereagainst.
Claim 4
Dependent Claim
202 words
Extensible fluid pressure actuated apparatus including a piston slidably carried in a cylinder for a multiple disc aircraft disc brake provided with fixed piston carrier means providing limited axial travel for the piston carried thereby, said fluid pressure actuated apparatus comprising: a controlled source of pressurized fluid; a fluid pressure responsive cylinder slidably carried in said carrier means and having an end wall; a fluid pressure responsive pisTon slidably carried in said cylinder; passage means communicating said cylinder and said piston with said pressurized fluid; a fixed retaining member having an axially spaced apart relationship with said end wall and engageable therewith; stop means including a plurality of spherical members arranged in column form and interposed between said fixed stop member and said end wall whereby the axial position of said end wall relative to said retaining member is dependent upon the number of spherical members in said column; and means operatively connecting said piston and said stop means for displacing one or more of said spherical members from said column in response to axial movement of said piston away from said end wall to permit said cylinder to axially follow said piston under the influence of said pressurized fluid acting thereagainst.
Claim 5
Dependent Claim
40 words
Extensible fluid pressure actuated apparatus as claimed in claim 1 wherein: said carrier means is provided with a cavity adapted to receive a sleeve member threadedly secured to said carrier means; said cylinder being slidably disposed in said sleeve member.
Claim 6
Dependent Claim
74 words
Extensible fluid pressure actuated apparatus as claimed in claim 2 and further including: a plate member having a threaded central opening therein and fixedly secured in position against the base of said cavity by said sleeve member bearing thereagainst; said retaining member including a rod member threadedly secured at one end in said central opening and extending axially therefrom through said end wall and provided with a transverse abutment at the free end thereof.
Claim 7
Dependent Claim
109 words
Extensible fluid pressure actuated apparatus as claimed in claim 3 wherein: said stop means includes a sleeve having at least one axially extending channel formed in the inner wall thereof and adapted to receive a plurality of balls; said fluid pressure responsive cylinder is axially aligned with said rod member and provided with an end wall having a central opening through which said rod member extends; an annular ramp is formed on said end wall adjacent said central opening and engageable with said column of balls for urging said balls radially outwardly from said sleeve in sequence upon movement of said sleeve axially relative to said column of balls.
Claim 8
Dependent Claim
43 words
Extensible fluid pressure actuated apparatus as claimed in claim 1 wherein: said stop means includes a sleeve having diametrically opposed axially extending channels formed in the inner wall thereof each of which channels is adapted to contain a column of said spherical members.
Claim 9
Dependent Claim
106 words
Extensible fluid pressure actuated apparatus as claimed in claim 5 and further including: a radially outwardly extending flange formed on said sleeve; and spaced apart first and second abutment means on said piston adapted to engage said flange; said first abutment means engaging said flange to urge said sleeve axially away from said end wall in response to axial movement of said piston to thereby expose one or more of said spherical members which exposed spherical members are urged radially outwardly from said column thereby permitting said end wall to advance axially toward said piston in response to the fluid pressure acting against said end wall.
Claim 10
Dependent Claim
58 words
Extensible fluid pressure actuated apparatus as claimed in claim 6 wherein said aircraft disc brake includes brake retracting means for retracting said piston a predetermined axial distance to establish a corresponding disc clearance upon release of said brake and wherein: said predetermined axial distance is less than the spacing between said spaced apart first and second abutment means.
Claim 11
Dependent Claim
22 words
Extensible fluid pressure actuated apparatus as claimed in claim 5 wherein: said piston is cup-shaped and slidably receives said sleeve coaxial therewith.
Claim 12
Dependent Claim
64 words
Extensible fluid pressure actuated apparatus as claimed in claim 5 wherein: said fluid pressure responsive cylinder is axially aligned with said sleeve and provided with an end wall haviNg a ramp portion bearing against said columns of spherical members; said ramp portion urging said spherical members radially outwardly from said sleeve upon movement of said sleeve axially relative to said columns of spherical members.
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) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |