US3795390A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shock absorber device
Assignee: Menasco Inc
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Filing: 1972-06-09
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Granted: 1974-03-05
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Expires: 1992-06-09
Abstract
Abstract A shock absorber having a helical coil spring and elastomeric material intermediate the coils of the coil spring to form a dual spring unit which with end members defines a closed chamber that is filled with a dampening medium. Arranged within the chamber is a hydraulic assembly acting in parallel with the dual spring unit.
Inventors
- 👤 G Kendall
- 👤 H Bhutani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:55
CPC Classifications
B; B60; B60R; B60R19/00; B60R19/02; B60R19/24; B60R19/26; F; F16; F16F; F16F3/00; F16F3/08; F16F3/10; F16F3/12
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
257 words
A shock absorber device comprising a dual spring unit including a mechanical spring and an elastomeric spring, said mechanical spring being comprised of a helical coil spring having a plurality of coils which are transversely oblong in crosssection and present transverse sides, said elastomeric spring being comprised of elastomeric material intermediate said coils of said coil spring and bonded at least to the transverse sides of said coils, a head member secured to one end of said dual spring unit, a base member secured to the other end of said dual spring unit, said dual spring unit and said head member and said base member defining a closed elongated axial chamber, a flowable dampening medium filling said chamber, said dual spring unit being axially compressed and said elastomeric spring being displaced generally radially outwardly by said dampening medium in response to movement of said head member and said base member relatively toward each other to absorb and dissipate compressive shock forces applied to said device, an axial cylinder within said chamber having one end secured to said base member, an axial piston rod within said chamber having one end secured to said head member and the other end projecting into said cylinder, a piston head assembly secured to said other end of said piston rod and axially movable within said cylinder, and orifice means to restrict the flow of said dampening medium from the interior of said cylinder to the remainder of said chamber as said piston head assembly moves toward said base member in said cylinder.
Claim 2
Dependent Claim
257 words
A shock absorber device comprising a dual spring unit including a mechanical spring and an elastomeric spring, said mechanical spring being comprised of a helical coil spring having a plurality of coils which are transversely oblong in crosssection and present transverse sides, said elastomeric spring being comprised of elastomeric material intermediate said coils of said coil spring and bonded at least to the transverse sides of said coils, a head member secured to one end of said dual spring unit, a base member secured to the other end of said dual spring unit, said dual spring unit and said head member and said base member defining a closed elongated axial chamber, a flowable dampening medium filling said chamber, said dual spring unit being axially compressed and said elastomeric spring being displaced generally radially outwardly by said dampening medium in response to movement of said head member and said base member relatively toward each other to absorb and dissipate compressive shock forces applied to said device, an axial cylinder within said chamber having one end secured to said base member, an axial piston rod within said chamber having one end secured to said head member and the other end projecting into said cylinder, a piston head assembly secured to said other end of said piston rod and axially movable within said cylinder, and orifice means to restrict the flow of said dampening medium from the interior of said cylinder to the remainder of said chamber as said piston head assembly moves toward said base member in said cylinder.
Claim 3
Dependent Claim
212 words
A shock absorber device comprising a dual spring unit including a mechanical spring and an elastomeric spring, a head member secured to one end of said dual spring unit, a base member secured to the other end of said dual spring unit, said dual spring unit and said head member and said base member defining a closed elongated axial chamber, a flowable dampening medium filling said chamber, said dual spring unit being axially compressed and said elastomeric spring being displaced generally radially outwardly by said dampening medium in response to movement of said head member and said base member relatively toward each other to absorb and dissipate compressive shock forces applied to said device, an axial cylinder within said chamber having one end secured to said base member, an axial piston rod within said chamber having one end secured to said head member and the other end projecting into said cylinder, a piston head assembly secured to said other end of said piston rod and axially movable within said cylinder, and orifice means associated with said piston head assembly to restrict the flow of said dampening medium from the interior of said cylinder to the remainder of said chamber as said piston head assembly moves toward said base member in said cylinder.
Claim 4
Dependent Claim
212 words
A shock absorber device comprising a dual spring unit including a mechanical spring and an elastomeric spring, a head member secured to one end of said dual spring unit, a base member secured to the other end of said dual spring unit, said dual spring unit and said head member and said base member defining a closed elongated axial chamber, a flowable dampening medium filling said chamber, said dual spring unit being axially compressed and said elastomeric spring being displaced generally radially outwardly by said dampening medium in response to movement of said head member and said base member relatively toward each other to absorb and dissipate compressive shock forces applied to said device, an axial cylinder within said chamber having one end secured to said base member, an axial piston rod within said chamber having one end secured to said head member and the other end projecting into said cylinder, a piston head assembly secured to said other end of said piston rod and axially movable within said cylinder, and orifice means associated with said piston head assembly to restrict the flow of said dampening medium from the interior of said cylinder to the remainder of said chamber as said piston head assembly moves toward said base member in said cylinder.
Claim 5
Dependent Claim
243 words
A shock absorber device comprising a dual spring unit including a mechanical spring and an elastomeric spring, a head member secured to one end of said dual spring unit, a base member secured to the other end of said dual spring unit, said dual spring unit and said head member and said base member defining a closed elongated axial chamber, a flowable dampening medium filling said chamber, said dual spring unit being axially compressed and said elastomeric spring being displaced generally radially outwardly by said dampening medium in response to movement of said head member and said base member relatively toward each other to absorb and dissipate compressive shock forces applied to said device, an axial cylinder within said chamber having one End secured to said base member, an axial hollow piston rod within said chamber having one end secured to said head member and the other end projecting into said cylinder, said hollow piston rod having a bleed port formed in the side thereof, a piston head assembly secured to said other end of said piston rod and axially movable within said cylinder, said piston head assembly serving to divide said chamber into a low pressure chamber section and into a high pressure chamber section interiorly of said cylinder, and said piston head assembly having a central axial orifice to restrict the flow of said dampening medium from said high pressure chamber section to said low pressure chamber section during force attenuation.
Claim 6
Dependent Claim
243 words
A shock absorber device comprising a dual spring unit including a mechanical spring and an elastomeric spring, a head member secured to one end of said dual spring unit, a base member secured to the other end of said dual spring unit, said dual spring unit and said head member and said base member defining a closed elongated axial chamber, a flowable dampening medium filling said chamber, said dual spring unit being axially compressed and said elastomeric spring being displaced generally radially outwardly by said dampening medium in response to movement of said head member and said base member relatively toward each other to absorb and dissipate compressive shock forces applied to said device, an axial cylinder within said chamber having one End secured to said base member, an axial hollow piston rod within said chamber having one end secured to said head member and the other end projecting into said cylinder, said hollow piston rod having a bleed port formed in the side thereof, a piston head assembly secured to said other end of said piston rod and axially movable within said cylinder, said piston head assembly serving to divide said chamber into a low pressure chamber section and into a high pressure chamber section interiorly of said cylinder, and said piston head assembly having a central axial orifice to restrict the flow of said dampening medium from said high pressure chamber section to said low pressure chamber section during force attenuation.
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) | 1977-03-04 | 1977-09-03 | 1978-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-04 | 1981-09-03 | 1982-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-04 | 1985-09-03 | 1986-03-05 | $7700.00 | Window Closed / Lapsed |