US3913460A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Impact damping means for fluid cylinders
Assignee: Mosier Ind Inc
•
Filing: 1974-01-15
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Granted: 1975-10-21
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Expires: 1994-01-15
Abstract
Abstract The impact damping means comprises one or more resilient rubberlike ring members arranged either upon the heads or upon the piston of a fluid cylinder, to cushion the piston stroke impact at the end of a stroke, and to induce concurrently a sealing function enhancing the fluid cylinder performance. In one form of the ring member, one or more relief ports may be incorporated therein to prevent excessive build-up of fluid pressure between portions of the ring member and a cylinder head at the end of a stroke, and to enhance breakaway upon reversal of the piston movement.
Inventors
- 👤 Lee A Wright
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:33
CPC Classifications
F; F15; F15B; F15B15/00; F15B15/20; F15B15/22; F15B15/222; F01; F01B; F01B11/00; F01B11/02; F15B15/226; F16; F16F; F16F9/00; F16F9/32; F16F9/58; F16F9/585; F16J; F16J10/00; F16J10/02; Y; Y10; Y10S; Y10S277/00; Y10S277/916
Claims Analysis
Total Claims: 40
Claim 1
Independent Claim
322 words
Impact damping means for a piston in a cylinder, comprising a cylinder having opposite end wall means, a piston means in said cylinder reciprocable toward and away from said end wall means, said piston means and at least one of said end wall means having cooperatively interengageable stop surfaces thereon defining at least one positive limit of travel of said piston means in said cylinder, one of said means having a recess therein having a side wall and a back wall, said side wall having an annular mounting groove therein; a one-piece, circular, resiliently deformable combination impact and seal ring in said recess, said ring having an outer surface and an inner surface and front and rear faces, an annular, planar, radially extending mounting flange on one of said inner and outer surfaces and having one side thereof coplanar with the rear face of the ring, said flange releasably received in said groove, means for releasably securing said ring in said recess with said rear face of the ring engaged against the rear wall of the recess, an annular, continuous, axially projecting sealing lip on said ring projecting axially no farther than the stop surface containing said recessed means, and a single, annular, continuous, resiliently deformable bumper on said ring between said sealing lip and said mounting flange and projecting axially substantially beyond said sealing flange and projecting axially substantially beyond said sealing lip and axially outwardly of said recess beyond said stop surface containing said recessed means to engage the other of said means to dampen impact between said stop surfaces at the limit of travel of said piston means, the recess having a volume at least as large as the volume of said ring so that contacting engagement between said stop surfaces results in compacting of said ring and the deformed bumper into said recess, to thus enable the piston means to consistently travel its full stroke in said cylinder.
Claim 2
Dependent Claim
322 words
Impact damping means for a piston in a cylinder, comprising a cylinder having opposite end wall means, a piston means in said cylinder reciprocable toward and away from said end wall means, said piston means and at least one of said end wall means having cooperatively interengageable stop surfaces thereon defining at least one positive limit of travel of said piston means in said cylinder, one of said means having a recess therein having a side wall and a back wall, said side wall having an annular mounting groove therein; a one-piece, circular, resiliently deformable combination impact and seal ring in said recess, said ring having an outer surface and an inner surface and front and rear faces, an annular, planar, radially extending mounting flange on one of said inner and outer surfaces and having one side thereof coplanar with the rear face of the ring, said flange releasably received in said groove, means for releasably securing said ring in said recess with said rear face of the ring engaged against the rear wall of the recess, an annular, continuous, axially projecting sealing lip on said ring projecting axially no farther than the stop surface containing said recessed means, and a single, annular, continuous, resiliently deformable bumper on said ring between said sealing lip and said mounting flange and projecting axially substantially beyond said sealing flange and projecting axially substantially beyond said sealing lip and axially outwardly of said recess beyond said stop surface containing said recessed means to engage the other of said means to dampen impact between said stop surfaces at the limit of travel of said piston means, the recess having a volume at least as large as the volume of said ring so that contacting engagement between said stop surfaces results in compacting of said ring and the deformed bumper into said recess, to thus enable the piston means to consistently travel its full stroke in said cylinder.
Claim 3
Dependent Claim
74 words
Impact damping as in claim 1, wherein the bumper has a leading edge outwardly of said recess beyond the stop surface on said one means and a base in said recess, said bumper having an increased cross-sectional size at its base, so that the bumper offers increasing resistance to impact between said stop surfaces after initial engagement of the leading edge of the bumper with the stop surface on the other of said means.
Claim 4
Dependent Claim
68 words
Impact damping means as in claim 1, wherein said piston means and each of said end wall means have mutually interengageable stop surfaces thereon defining opposite limits of travel of said piston means in said cylinder, and the impact and seal ring is operatively associated with the piston means and each end wall means to dampen impact between the piston means and each of the end wall means.
Claim 5
Dependent Claim
28 words
Damping means as defined by claim 1, wherein said mounting flange, said sealing lip, and said bumper have a common base in the plane of the mounting flange.
Claim 6
Dependent Claim
23 words
Damping means as defined by claim 1, wherein the bumper has a leading edge having at least one transverse relief port incorporated therein.
Claim 7
Dependent Claim
39 words
Damping means as defined by claim 1, wherein said bumper includes a side wall which is substantially normal to the plane of the mounting flange, and wherein said sealing lip circumscribes and is inclined away from said side wall.
Claim 8
Dependent Claim
31 words
Damping means as defined by claim 1, wherein said bumper includes side walls which converge from said base, and wherein said sealing lip circumscribes and is inclined away from said bumper.
Claim 9
Dependent Claim
32 words
Damping means as defined by claim 1, wherein said bumper includes side walls which converge from said base, and wherein said sealing lip is circumscribed by and inclined away from said bumper.
Claim 10
Dependent Claim
60 words
The combination as called for in claim 1, which includes means operative incident to an entrapment of cylinder fluid between the annular bumper and the inner wall of the cylinder head for relieving pressure upon the entrapped fluid as the piston approaches contact with the inner Wall of said cylinder, said means comprising a bleed opening in the cylinder head.
Claim 11
Dependent Claim
19 words
A ring as called for in claim 1, wherein the recess means are located in the said piston means.
Claim 12
Dependent Claim
21 words
A sealing ring as called for in claim 1, wherein the recess means are located in the said end wall means.
Claim 13
Dependent Claim
276 words
Impact damping means for a piston in a cylinder, comprising a cylinder having opposite end wall means, a piston means in said cylinder reciprocable toward and away from said end wall means, said piston means and at least one of said end wall means having cooperatively interengageable stop surfaces thereon defining at least one positive limit of travel of said piston means in said cylinder, one of said means having a recess therein including an annular mounting groove; a onepiece, circular, resiliently deformable combination impact and seal ring in said recess said ring having an inner surface, an outer surface and front and rear faces, said ring having an annular mounting flange thereon received in said groove and having one side thereof coplanar with the rear face of the ring, means for releasably securing said ring in said recess, an annular, continuous, axially projecting sealing lip on said ring projecting axially no farther than the stop surface containing said recessed means, and a single, annular, continuous, resiliently deformable bumper on said ring between said sealing lip and said mounting flange and projecting axially substantially beyond said sealing lip and axialy outwardly of said recess beyond said stop surface containing said recessed means to engage the other of said means to dampen impact between said stop surfaces at the limit of travel of said piston means, the recess having a volume at least as large as the volume of said ring so that contacting engagement between said stop surfaces results in compacting of said ring and the deformed bumper into said recess, to thus enable the piston means to consistently travel its full stroke in said cylinder.
Claim 14
Dependent Claim
276 words
Impact damping means for a piston in a cylinder, comprising a cylinder having opposite end wall means, a piston means in said cylinder reciprocable toward and away from said end wall means, said piston means and at least one of said end wall means having cooperatively interengageable stop surfaces thereon defining at least one positive limit of travel of said piston means in said cylinder, one of said means having a recess therein including an annular mounting groove; a onepiece, circular, resiliently deformable combination impact and seal ring in said recess said ring having an inner surface, an outer surface and front and rear faces, said ring having an annular mounting flange thereon received in said groove and having one side thereof coplanar with the rear face of the ring, means for releasably securing said ring in said recess, an annular, continuous, axially projecting sealing lip on said ring projecting axially no farther than the stop surface containing said recessed means, and a single, annular, continuous, resiliently deformable bumper on said ring between said sealing lip and said mounting flange and projecting axially substantially beyond said sealing lip and axialy outwardly of said recess beyond said stop surface containing said recessed means to engage the other of said means to dampen impact between said stop surfaces at the limit of travel of said piston means, the recess having a volume at least as large as the volume of said ring so that contacting engagement between said stop surfaces results in compacting of said ring and the deformed bumper into said recess, to thus enable the piston means to consistently travel its full stroke in said cylinder.
Claim 15
Dependent Claim
296 words
Impact damping means for a piston in a cylinder having opposite end walls, a piston rod reciprocably mounted in said cylinder, a piston secured to and carried by said piston rod, interengageable stop surfaces on said piston and said end walls defining opposite limits of travel of said piston in said end walls defining opposite limits of travel of said piston in said cylinder, the end walls of said cylinder having an annular mounting groove therein; a one-piece, circular, continuous, resilient, combination impact-dampening and sealing ring having a circular opening therein, an outer surface, a front face, an annular planar, radially extending mounting flange on said outer surface, and having one side thereof coplanar with said rear face; an annular, continuous, resilient sealing lip in said circular opening angularly inclined toward the axis of said ring; and a single, continuous, annular, resiliently deformable, axially projecting bumper on said front face between said sealing lip and said mounting flange, coaxial with said opening and projecting axially substantially beyond said sealing lip; said annular mounting flange releasably received in the annular mounting groove of a cylinder end wall with said sealing lip and bumper projecting toward the interior of a cylinder; said sealing lip adapted to sealingly engage portions of a piston rod introduced thereinto, said sealing lip terminating short of said cylinder stop surface so that said sealing lip does not engage the stop surface of the piston at the limit of travel of said piston; said bumper being disposed between said sealing lip and said mounting flange and coaxial therewith, said bumper engageable with the stop surface of said piston to dampen the impact of said piston against the end wall of the cylinder while permitting contact between the stop surfaces of said piston and cylinder.
Claim 16
Dependent Claim
296 words
Impact damping means for a piston in a cylinder having opposite end walls, a piston rod reciprocably mounted in said cylinder, a piston secured to and carried by said piston rod, interengageable stop surfaces on said piston and said end walls defining opposite limits of travel of said piston in said end walls defining opposite limits of travel of said piston in said cylinder, the end walls of said cylinder having an annular mounting groove therein; a one-piece, circular, continuous, resilient, combination impact-dampening and sealing ring having a circular opening therein, an outer surface, a front face, an annular planar, radially extending mounting flange on said outer surface, and having one side thereof coplanar with said rear face; an annular, continuous, resilient sealing lip in said circular opening angularly inclined toward the axis of said ring; and a single, continuous, annular, resiliently deformable, axially projecting bumper on said front face between said sealing lip and said mounting flange, coaxial with said opening and projecting axially substantially beyond said sealing lip; said annular mounting flange releasably received in the annular mounting groove of a cylinder end wall with said sealing lip and bumper projecting toward the interior of a cylinder; said sealing lip adapted to sealingly engage portions of a piston rod introduced thereinto, said sealing lip terminating short of said cylinder stop surface so that said sealing lip does not engage the stop surface of the piston at the limit of travel of said piston; said bumper being disposed between said sealing lip and said mounting flange and coaxial therewith, said bumper engageable with the stop surface of said piston to dampen the impact of said piston against the end wall of the cylinder while permitting contact between the stop surfaces of said piston and cylinder.
Claim 17
Dependent Claim
49 words
A device as called for in claim 13, wherein the recesses in the end walls of the cylinder have a volumetric capacity sufficient to receive the mounting fLange and those portions of the bumper which are compacted and deformed incident to contact with the stop surface of the piston.
Claim 18
Dependent Claim
65 words
The combination as called for in claim 13, wherein the annular sealing lip defines the central opening of said combination impact damping and sealing ring; spear portions at and projecting from the opposite stop surfaces of the piston for providing a fluid seal between the sealing lips and the spear portions incident to entry of the spear portions into the central opening of said ring.
Claim 19
Dependent Claim
131 words
The combination as called for in claim 15, wherein the spear portions on that side of the stop surface of the piston which is remote from the piston rod comprise forwardly projecting extension in axial alignment with the piston rod, and wherein one end wall of the cylinder includes an axially aligned, spear receptive bore which projects inwardly beyond and centrally of the annular mounting groove in said end wall of the cylinder, and wherein the spear portion which is on the piston-rod side of the piston stop surface comprises an enlarged portion of the piston rod, and wherein the other end wall of said cylinder includes an axially enlarged, spear receptive bore which projects inwardly beyond and centrally of the annular mounting groove in said end wall of the cylinder.
Claim 20
Dependent Claim
187 words
Impact damping means for a piston in a cylinder, said damping means comprising a one-piece, circular, resilient combination impact-damping and sealing ring having a circular opening therein and inner and outer surfaces and a front face and a substantially smooth, planar rear face; an annular, planar, radially extending mounting flange on one of said surfaces and having one side thereof coplanar with said rear face; an annular, resilient sealing lip on the other of said surfaces and angularly inclined relative to the axis of said ring; and a single, continuous, annular, resiliently deformable, axially projecting bumper on said front face between said sealing lip and said mounting flange coaxial with said opening and projecting axially substantially beyond said sealing lip, for use in a piston and cylinder to engage between the piston and cylinder to absorb impact between a piston and cylinder and yet to enable contact between the piston and cylinder so that the piston has a constant limit of travel in the cylinder, said mounting flange being resiliently yieldable to enable said flange to be readily positioned in and removed from a flange mounting groove.
Claim 21
Dependent Claim
187 words
Impact damping means for a piston in a cylinder, said damping means comprising a one-piece, circular, resilient combination impact-damping and sealing ring having a circular opening therein and inner and outer surfaces and a front face and a substantially smooth, planar rear face; an annular, planar, radially extending mounting flange on one of said surfaces and having one side thereof coplanar with said rear face; an annular, resilient sealing lip on the other of said surfaces and angularly inclined relative to the axis of said ring; and a single, continuous, annular, resiliently deformable, axially projecting bumper on said front face between said sealing lip and said mounting flange coaxial with said opening and projecting axially substantially beyond said sealing lip, for use in a piston and cylinder to engage between the piston and cylinder to absorb impact between a piston and cylinder and yet to enable contact between the piston and cylinder so that the piston has a constant limit of travel in the cylinder, said mounting flange being resiliently yieldable to enable said flange to be readily positioned in and removed from a flange mounting groove.
Claim 22
Dependent Claim
103 words
A combination impact-damping and sealing ring for fluid cylinders comprising: a circular ring of resilient, rubber-like material having an outer peripheral edge defining a circumference of the ring and an inner peripheral edge defining a central opening therethrough, a front fact and a rear face an annular, planar radially extending mounting flange adjacent one peripheral edge and having one side thereof coplanar with said rear face, an annular, continuous, axially projecting sealing lip adjacent the other peripheral edge, and a continuous, annular, resilient bumper intermediate said sealing lip and mounting flange, projecting in the same direction of and axially beyond said sealing lip.
Claim 23
Dependent Claim
103 words
A combination impact-damping and sealing ring for fluid cylinders comprising: a circular ring of resilient, rubber-like material having an outer peripheral edge defining a circumference of the ring and an inner peripheral edge defining a central opening therethrough, a front fact and a rear face an annular, planar radially extending mounting flange adjacent one peripheral edge and having one side thereof coplanar with said rear face, an annular, continuous, axially projecting sealing lip adjacent the other peripheral edge, and a continuous, annular, resilient bumper intermediate said sealing lip and mounting flange, projecting in the same direction of and axially beyond said sealing lip.
Claim 24
Dependent Claim
26 words
A combination impact-damping and sealing ring as called for in claim 18, wherein the planar mounting flange is adjacent the inner peripheral edge of said ring.
Claim 25
Dependent Claim
26 words
A combination impact-damping and sealing ring as called for in claim 18, wherein the planar mounting flange is adjacent the outer peripheral edge of said ring.
Claim 26
Dependent Claim
31 words
A combination impact-damping and sealing ring as called for in claim 18, wherein said mounting flange, sealing lip and bumper have a common base in the plane of the mounting flange.
Claim 27
Dependent Claim
32 words
A combination impact-damping and sealing ring as called for in claim 21, wherein said bumper includes a side wall which is adjacent and substantially normal to the plane of the mounting flange.
Claim 28
Dependent Claim
27 words
A combination impact-damping and sealing ring as called for in claim 18, wherein the bumper has a leading edge having at least onE transverse relief port therein.
Claim 29
Dependent Claim
24 words
A combination impact-damping and sealing ring as called for in claim 18, wherein the annular sealing lip defines the diameter of said central opening.
Claim 30
Dependent Claim
24 words
A combination impact-damping and sealing ring as called for in claim 18, wherein the annular sealing lip defines the outer circumference of the ring.
Claim 31
Dependent Claim
67 words
A combination impact-damping and sealing ring as called for in claim 18, wherein the outer surface of the sealing lip is inclined an an angle of about 15* from the axis of the ring, and wherein the juncture between said inclined surface and a surface of the planar mounting flange is defined by a rounded edge which is tangent to the edges of each of said surfaces.
Claim 32
Dependent Claim
34 words
A combination impact-damping and sealing ring as called for in claim 26, wherein the inner surface of the sealing lip is inclined at an angle of about 20* from the axis of the ring.
Claim 33
Dependent Claim
70 words
A combination impact-damping and sealing ring as called for in claim 27, wherein the bumper is defined by a first substantially straight surface adjacent the inner inclined surface of the sealing lip in substantial parallelism with the axis of the ring and a second surface which is inclined downwardly and away from leading edge of said bumper at an angle of about 20* relative to the axis of the ring.
Claim 34
Dependent Claim
35 words
A combination impact-damping and sealing ring as called for in claim 26, wherein the sealing lip terminates in a leading edge disposed in a plane which is substantially normal to the axis of said ring.
Claim 35
Dependent Claim
69 words
A combination impact-damping and sealing ring as called for in claim 18, wherein the inner surface of the sealing lip is inclined at an angle of about 15* from the axis of the ring, and wherein the bumper is defined by a pair of substantially straight surfaces which diverge from the leading edge of the bumper, said surfaces being inclined about 10* relative to the axis of the ring.
Claim 36
Dependent Claim
185 words
A combination impact-damping and sealing ring for fluid cylinders comprising a circular ring of resilient rubber-like material having an outer peripheral edge defining a circumference of the ring and an inner peripheral edge defining a central opening therethrough, a front face and a rear face an annular radially extending planar mounting flange adjacent said inner peripheral edge and having one side thereof coplanar with said rear face, an annular, continuous, axially projecting combination sealing lip and bumper adjacent the other peripheral edge, wherein said sealing lip and bumper includes a sealing portion having upwardly and outwardly inclined inner and outer surfaces, and a bumper portion between said sealing portion and said mounting flange and having upwardly and outwardly inclined inner and outer surfaces, said combination sealing lip and bumper terminating in a leading edge which extends downwardly and outwardly from the circumferential edge of the outer surface of the sealing lip portion and wherein the outer lower portion of said outer surface terminates in a rounded surface which is tangent to said inclined surface and the inner surface of said combination sealing lip and bumper.
Claim 37
Dependent Claim
185 words
A combination impact-damping and sealing ring for fluid cylinders comprising a circular ring of resilient rubber-like material having an outer peripheral edge defining a circumference of the ring and an inner peripheral edge defining a central opening therethrough, a front face and a rear face an annular radially extending planar mounting flange adjacent said inner peripheral edge and having one side thereof coplanar with said rear face, an annular, continuous, axially projecting combination sealing lip and bumper adjacent the other peripheral edge, wherein said sealing lip and bumper includes a sealing portion having upwardly and outwardly inclined inner and outer surfaces, and a bumper portion between said sealing portion and said mounting flange and having upwardly and outwardly inclined inner and outer surfaces, said combination sealing lip and bumper terminating in a leading edge which extends downwardly and outwardly from the circumferential edge of the outer surface of the sealing lip portion and wherein the outer lower portion of said outer surface terminates in a rounded surface which is tangent to said inclined surface and the inner surface of said combination sealing lip and bumper.
Claim 38
Dependent Claim
79 words
A combination inpact-damping and sealing ring as called for in claim 31, wherein the outer surface of said sealing lip portion is inclined at an angle of about 12*, and wherein the inner surface of said bumper portion is inclined at an angle of about 15* with reference to the axis of said ring, and wherein said leading edge is inclined at an angle of about 20* relative to a plane normal to the axis of the said ring.
Claim 39
Dependent Claim
156 words
A combination impact-damping and sealing ring comprising: a. a circular, annular, ring of resilient, rubber-like material having a substantially flat, radially extending, planar rear surface, b. an annular, continuous, radially extending mounting flange defined by a pair of substantially parallel, planar, laterally spaced front and rear walls one end of each Of which terminate in an axial end wall which defines one peripheral edge of the ring, and wherein said rear wall of said mounting flange is co-planar with the rear surface of the ring, c. an annular, continuous sealing lip defining the other peripheral edge of the ring, wherein said lip is inclined away from the axial end wall of the mounting flange and terminates in a continuous, free, outer, forward end, and, d. an annular, continuous, axially projecting bumper intermediate the sealing lip and mounting flange, terminating in a free, outer, continuous forward end which projects beyond the forward end of the sealing lip.
Claim 40
Dependent Claim
156 words
A combination impact-damping and sealing ring comprising: a. a circular, annular, ring of resilient, rubber-like material having a substantially flat, radially extending, planar rear surface, b. an annular, continuous, radially extending mounting flange defined by a pair of substantially parallel, planar, laterally spaced front and rear walls one end of each Of which terminate in an axial end wall which defines one peripheral edge of the ring, and wherein said rear wall of said mounting flange is co-planar with the rear surface of the ring, c. an annular, continuous sealing lip defining the other peripheral edge of the ring, wherein said lip is inclined away from the axial end wall of the mounting flange and terminates in a continuous, free, outer, forward end, and, d. an annular, continuous, axially projecting bumper intermediate the sealing lip and mounting flange, terminating in a free, outer, continuous forward end which projects beyond the forward end of the sealing lip.
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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) | 1978-10-20 | 1979-04-21 | 1979-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-20 | 1983-04-21 | 1983-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-20 | 1987-04-21 | 1987-10-21 | $7700.00 | Window Closed / Lapsed |