Patent US4934749A successfully refreshed from Google Patents.
US4934749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metering pin for an energy absorber
Assignee: Motors Liquidation Co
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Filing: 1989-09-05
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Granted: 1990-06-19
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Expires: 2009-09-05
Abstract
Abstract A moldable metering pin for an energy absorber unit includes an integral base having a plurality of openings. The base is press-fitted in an outer cylinder of the unit. The openings in the base prevent the formation of air pockets between the base and an end cap of the outer cylinder. During impact, fluid in a rear chamber passes to the end cap, thereby reducing fluid forces on the base of the metering pin.
Inventors
- 👤 Abayomi O. Folarin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:13
CPC Classifications
B; B60; B60R; B60R19/00; B60R19/02; B60R19/24; B60R19/26; B60R19/32; F; F16; F16F; F16F9/00; F16F9/32; F16F9/34; F16F9/342; F16F9/48; F16F9/486
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
166 words
An impact energy absorber unit for mounting a bumper assembly to a vehicle body structure, comprising: (a) first and second cylinders; (b) support means mounting the first cylinder for telescopic movement with respect to the second cylinder between an extended position and a retracted position; (c) a cap secured to a first end of the first cylinder thereby dividing the cylinders into first and second hydraulic chambers, the cap having a fixed central orifice providing hydraulic communication between the chambers; (d) a molded metering pin extending longitudinally in the unit, the metering pin including (i) a rod disposed within the central orifice, and (ii) a base connected to the rod, the diameter of the base being of sufficient size to provide a press fit into the second cylinder, thereby fixing the location of the rod within the central orifice, and (iii) a plurality of openings in the base to permit the flow of fluid through the base within the second cylinder during movement of the cylinders.
Claim 2
Dependent Claim
166 words
An impact energy absorber unit for mounting a bumper assembly to a vehicle body structure, comprising: (a) first and second cylinders; (b) support means mounting the first cylinder for telescopic movement with respect to the second cylinder between an extended position and a retracted position; (c) a cap secured to a first end of the first cylinder thereby dividing the cylinders into first and second hydraulic chambers, the cap having a fixed central orifice providing hydraulic communication between the chambers; (d) a molded metering pin extending longitudinally in the unit, the metering pin including (i) a rod disposed within the central orifice, and (ii) a base connected to the rod, the diameter of the base being of sufficient size to provide a press fit into the second cylinder, thereby fixing the location of the rod within the central orifice, and (iii) a plurality of openings in the base to permit the flow of fluid through the base within the second cylinder during movement of the cylinders.
Claim 3
Dependent Claim
22 words
The impact energy absorber unit as specified in claim 1 wherein the base includes a plurality of ridges on it outer circumference.
Claim 4
Dependent Claim
22 words
The impact energy absorber unit as specified in claim 2 wherein the base includes a cover on a portion of the base.
Claim 5
Dependent Claim
57 words
A moldable metering pin for controlling fluid flow in an energy absorber unit, comprising: (a) a longitudinally extending rod; (b) a circular base integrally molded to one end of the rod; (c) at least one opening in the base for permitting fluid to pass by the base when the pin in installed in the energy absorber unit.
Claim 6
Dependent Claim
57 words
A moldable metering pin for controlling fluid flow in an energy absorber unit, comprising: (a) a longitudinally extending rod; (b) a circular base integrally molded to one end of the rod; (c) at least one opening in the base for permitting fluid to pass by the base when the pin in installed in the energy absorber unit.
Claim 7
Dependent Claim
28 words
The metering pin as specified in claim 4 wherein a plurality of openings in the base are divided by spokes radiating from a central portion of the base.
Claim 8
Dependent Claim
20 words
The metering pin as specified in claim 4 including a plurality of ridges on the outer circumference of the base.
Claim 9
Dependent Claim
17 words
The metering pin as specified in claim 4 including a cover on a portion of the base.
References Cited (Backward Citations)
US3008746A
Cited
US3887224A
Cited
US4054311A
Cited
US4097080A
Cited
US4426109A
Cited
US4789192A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-06-18 | 1993-12-18 | 1994-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-18 | 1997-12-18 | 1998-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-18 | 2001-12-18 | 2002-06-19 | $7700.00 | Window Closed / Lapsed |