US4080875A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vehicle braking means
Assignee: Individual
•
Filing: 1976-05-05
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Granted: 1978-03-28
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Expires: 1996-05-05
Abstract
Abstract A vehicle braking means is disclosed in which an auxiliary chamber 2 comprises a locking mechanism whose function is to lock together a piston 5 and a piston rod 16. The locking mechanism comprises a spring-loaded guide 19 and locking elements 20 arranged to constantly contact the guide 19 and to engage the piston 5. To release the vehicle brakes, provision is made of a rod 21 or a pushrod 43 extending from the auxiliary chamber 2. As compared with the constructions known currently, the auxiliary chamber 2 is more readily operable and convenient in use.
Inventors
- 👤 Alexandr Ivanovich Repolovsky
- 👤 Ilya Kharitonovich Pakhter
- 👤 Alexei Dmitrievich Rudakov
- 👤 Alexandr Nikolaevich Baranov
- 👤 Leonid Efimovich Gliner
- 👤 Dmitry Trdatovich Gapoian
- 👤 Igor Veniaminovich Tumasiants
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:32
CPC Classifications
B; B60; B60T; B60T17/00; B60T17/08; B60T17/085; B60T17/086; B60T17/083
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
338 words
In a vehicle braking means comprising, in combination: a first housing defining a main chamber; a second housing attached to said first housing defining an auxiliary chamber; brake actuating mechanism contained in said main chamber; a piston accomodated in the auxiliary chamber, said piston having a bore therethrough a spring loading said piston in a brake applying direction; a piston rod accommodated in said auxiliary chamber slidably mounted in said bore of said piston and arranged for actuating said brake actuating mechanism; pressure fluid means for applying pressure to hold said piston against the action of said spring; locking means for releasably locking said piston rod and said piston together; and releasing means for manually releasing said locking means after said piston rod actuates said brake actuating mechanism following a loss of pressure, the improvement wherein said piston rod is hollow; said locking means and said releasing means are disposed within said piston rod; said locking means comprises at least one locking ball, said bore of said piston having an inscribed circumferential groove, and said piston rod having at least one opening on its circumference through which said at least one locking ball can partially pass, whereby said piston and said piston rod are locked together when said locking ball is seated in said groove; and said releasing means comprises guide means operatively associated with said at least one locking ball and disposed within said piston rod, said guide means having first and second surfaces, said first surface for holding said at least one locking ball seated in said groove, said second surface for allowing said at least one locking ball to be released from said groove thereby unlocking said piston rod from said piston, spring means for urging said guide means so that said first surface is contacting said at least one locking ball, and actuating means for moving said guide means against the action of said spring means so that said second surface is contacting said at least one locking ball thereby releasing said locking means.
Claim 2
Dependent Claim
338 words
In a vehicle braking means comprising, in combination: a first housing defining a main chamber; a second housing attached to said first housing defining an auxiliary chamber; brake actuating mechanism contained in said main chamber; a piston accomodated in the auxiliary chamber, said piston having a bore therethrough a spring loading said piston in a brake applying direction; a piston rod accommodated in said auxiliary chamber slidably mounted in said bore of said piston and arranged for actuating said brake actuating mechanism; pressure fluid means for applying pressure to hold said piston against the action of said spring; locking means for releasably locking said piston rod and said piston together; and releasing means for manually releasing said locking means after said piston rod actuates said brake actuating mechanism following a loss of pressure, the improvement wherein said piston rod is hollow; said locking means and said releasing means are disposed within said piston rod; said locking means comprises at least one locking ball, said bore of said piston having an inscribed circumferential groove, and said piston rod having at least one opening on its circumference through which said at least one locking ball can partially pass, whereby said piston and said piston rod are locked together when said locking ball is seated in said groove; and said releasing means comprises guide means operatively associated with said at least one locking ball and disposed within said piston rod, said guide means having first and second surfaces, said first surface for holding said at least one locking ball seated in said groove, said second surface for allowing said at least one locking ball to be released from said groove thereby unlocking said piston rod from said piston, spring means for urging said guide means so that said first surface is contacting said at least one locking ball, and actuating means for moving said guide means against the action of said spring means so that said second surface is contacting said at least one locking ball thereby releasing said locking means.
Claim 3
Dependent Claim
132 words
The improvement of claim 1 wherein said guide means comprises a cylinder longitudinally aligned with said piston rod, said guide means having an axial bore, opposite ends and first and second portions, said first surface comprises the outer circumference of the first portion of said cylinder, said second surface comprises a circumferential groove in the second portion of said cylinder deep enough to allow said at least one locking ball to be released from the groove in said bore of said piston, said first portion tapering smoothly to said second portion and said actuating means comprises a tie rod operativly associated with said cylinder to move the same so that said at least one locking ball moves into said groove in said second portion thereby unlocking said piston rod from said piston.
Claim 4
Dependent Claim
57 words
The improvement of claim 2 wherein said second portion of said cylinder is on the brake applying direction end of said cylinder, said spring means being a helically coiled spring pressing the opposite end of said cylinder and said tie rod extends through said axial bore of said cylinder and through an opening in the second housing.
Claim 5
Dependent Claim
133 words
The improvement as claimed in claim 1, in which said guide means comprises a cylinder around a periphery of which are provided double recesses constituting said first and second surfaces, one double recess for each of said locking ball, one portion of each of said double recesses being shaped so as to seat the associated locking ball when it is disengaged from said piston and the other portion being shaped so as to seat said locking ball when it is engaged with said piston, and wherein said guide means is provided with an endpiece on which is fitted said spring means in the form of a torsional spring secured at one end to said endpiece and at the other end to said piston rod for connecting said guide means to the actuating means.
Claim 6
Dependent Claim
128 words
The improvement as claimed in claim 1, in which said guide means comprises two integral coaxial cylinders of different diameter with a taper between them, the cylinder diameters being dimensioned so that the large cylinder forming said first surface is able to bring said at least one locking ball into engagement with said piston and the small cylinder forming said second surface permits said at least one locking ball to disengage from said piston, and wherein said spring means comprises a compression spring fitted inside said piston rod between its end wall and said guide means, and a guide travel stop and a pushrod which extends from the housing of said auxiliary chamber are fitted to the other end of said guide means to form said actuating means.
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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) | 1981-03-27 | 1981-09-26 | 1982-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-27 | 1985-09-26 | 1986-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-27 | 1989-09-26 | 1990-03-28 | $7700.00 | Window Closed / Lapsed |