Patent US3550422A successfully refreshed from Google Patents.
Patent US3776100A successfully refreshed from Google Patents.
US3776100A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cushion device
Assignee: Navistar International Corp
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Filing: 1972-05-01
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Granted: 1973-12-04
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Expires: 1992-05-01
Abstract
Abstract A cushion device for a contractible chamber formed by a housing and a piston movable therein with an exhaust port normally permitting fluid to exhaust from said chamber, said cushion device comprising a recess within a wall of the piston unit, a decelerating member movable within said recess and having a surface complementary to the wall of the housing adjacent to the exhaust port, with interruptions therein for metering fluid from the interior of the chamber as the piston approaches the end of its stroke.
Inventors
- 👤 R Yeh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:57
CPC Classifications
F; F15; F15B; F15B15/00; F15B15/20; F15B15/22; F15B15/224
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
146 words
A hydraulic motor for effecting rotational movement comprising: a. a housing, b. a pinion shaft therethrough, c. piston means within said housing defining fluid chambers at either end thereof, said piston means having teeth thereon, adapted to be engaged with teeth upon said shaft whereby reciprocable motion of said piston means within said housing will effect rotational motion of one of said housing and shaft, d. a fluid port connected to each chamber, e. decelerator means associated with at least one end of said piston means, said decelerator means comprising a noncontinuous groove within said piston means, a thin arcuate member having limited motion within said groove and an external surface adapted to overlie one of said ports associated with said chambers, said surface having interruptions thereon to permit metered flow of fluid from the associated chamber as the piston approaches the end of its stroke.
Claim 2
Dependent Claim
146 words
A hydraulic motor for effecting rotational movement comprising: a. a housing, b. a pinion shaft therethrough, c. piston means within said housing defining fluid chambers at either end thereof, said piston means having teeth thereon, adapted to be engaged with teeth upon said shaft whereby reciprocable motion of said piston means within said housing will effect rotational motion of one of said housing and shaft, d. a fluid port connected to each chamber, e. decelerator means associated with at least one end of said piston means, said decelerator means comprising a noncontinuous groove within said piston means, a thin arcuate member having limited motion within said groove and an external surface adapted to overlie one of said ports associated with said chambers, said surface having interruptions thereon to permit metered flow of fluid from the associated chamber as the piston approaches the end of its stroke.
Claim 3
Dependent Claim
137 words
A hydraulic motor for effecting rotational movement comprising: a. a housing, b. a pinion shaft therethrough, c. piston means within said housing defining fluid chambers at each end thereof, said piston means having teeth thereon, adapted to be engaged with teeth upon said shaft whereby reciprocable motion of said piston means within said housing will effect rotational motion of one of said housing and shaft, d. a fluid port connected to each chamber, e. decelerator means associated with an least one end of said piston means, said decelerator means comprising a non-continuous groove within said piston means, a thin arcuate member loosely mounted and having limited motion within said groove and an external surface adapted to overlie one of said fluid ports associated with said chambers, said surface being complementary to the wall surface of said housing.
Claim 4
Dependent Claim
137 words
A hydraulic motor for effecting rotational movement comprising: a. a housing, b. a pinion shaft therethrough, c. piston means within said housing defining fluid chambers at each end thereof, said piston means having teeth thereon, adapted to be engaged with teeth upon said shaft whereby reciprocable motion of said piston means within said housing will effect rotational motion of one of said housing and shaft, d. a fluid port connected to each chamber, e. decelerator means associated with an least one end of said piston means, said decelerator means comprising a non-continuous groove within said piston means, a thin arcuate member loosely mounted and having limited motion within said groove and an external surface adapted to overlie one of said fluid ports associated with said chambers, said surface being complementary to the wall surface of said housing.
Claim 5
Dependent Claim
134 words
In an expansible chamber device having a housing, a fluid port, a piston means movable within said housing and having a surface in sealing engagement with the interior of the housing so as to form a chamber and a reacting surface for permitting expansion of said chamber, the improvement comprising: a. a recess in the sealing surface of said piston means and extending no more than half way therearound, b. a decelerator member consisting of a hollow cylindrical sector loosely mounted in said recess having a surface for covering said fluid port when said chamber is contracted for limiting the exhaust of fluid from said chamber, said surface having an external radius substantially the same as the internal diameter of said chamber, thereby resulting in area type contact therebetween with the elimination of scoring.
Claim 6
Dependent Claim
134 words
In an expansible chamber device having a housing, a fluid port, a piston means movable within said housing and having a surface in sealing engagement with the interior of the housing so as to form a chamber and a reacting surface for permitting expansion of said chamber, the improvement comprising: a. a recess in the sealing surface of said piston means and extending no more than half way therearound, b. a decelerator member consisting of a hollow cylindrical sector loosely mounted in said recess having a surface for covering said fluid port when said chamber is contracted for limiting the exhaust of fluid from said chamber, said surface having an external radius substantially the same as the internal diameter of said chamber, thereby resulting in area type contact therebetween with the elimination of scoring.
Claim 7
Dependent Claim
144 words
In an expansible chamber device having a housing, piston means movable therein and having a surface in sealing engagement with the interior of the housing so as to form a chamber on each side of said piston means and reacting surfaces for causing expansion and contraction of said chambers, fluid ports for directing and exhausting fluid from each of said chambers, an improved decelerating means comprising: a. a non-continuous recess in the sealing surface of said piston means, b. a thin arcuate decelerating member loosely mounted in said recess having a surface for covering an appropriate port as the piston means approaches the end of its stroke, said surface being complementary to the wall surface of said housing, c. interruptions in the surface of said decelerator member for metering flow from said contracting chamber when the piston has reached the end of its stroke.
Claim 8
Dependent Claim
144 words
In an expansible chamber device having a housing, piston means movable therein and having a surface in sealing engagement with the interior of the housing so as to form a chamber on each side of said piston means and reacting surfaces for causing expansion and contraction of said chambers, fluid ports for directing and exhausting fluid from each of said chambers, an improved decelerating means comprising: a. a non-continuous recess in the sealing surface of said piston means, b. a thin arcuate decelerating member loosely mounted in said recess having a surface for covering an appropriate port as the piston means approaches the end of its stroke, said surface being complementary to the wall surface of said housing, c. interruptions in the surface of said decelerator member for metering flow from said contracting chamber when the piston has reached the end of its stroke.
Claim 9
Dependent Claim
139 words
In an expansible diameter device having a housing with an internal bore, a piston means with a peripheral surface movable within said bore and forming therewith a chamber, a fluid port communicating with said chamber, the improvement comprising: a non-continuous groove in the peripheral surface of the piston means; a decelerator member consisting of a hollow cylindrical sector loosely carried in said groove and having a metering surface for covering said fluid port when said chamber is contracted for limiting the exhaust of flUid from said chamber; said decelerator member being forced into engagement with the said bore by the pressure exerted thereon by fluid escaping from the chamber through said port and capable of conforming to the radius of said bore, whereby scoring of the internal bore by the decelerator member during contraction of the chamber is minimized.
Claim 10
Dependent Claim
139 words
In an expansible diameter device having a housing with an internal bore, a piston means with a peripheral surface movable within said bore and forming therewith a chamber, a fluid port communicating with said chamber, the improvement comprising: a non-continuous groove in the peripheral surface of the piston means; a decelerator member consisting of a hollow cylindrical sector loosely carried in said groove and having a metering surface for covering said fluid port when said chamber is contracted for limiting the exhaust of flUid from said chamber; said decelerator member being forced into engagement with the said bore by the pressure exerted thereon by fluid escaping from the chamber through said port and capable of conforming to the radius of said bore, whereby scoring of the internal bore by the decelerator member during contraction of the chamber is minimized.
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) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |