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US4488433A
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US
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Crash test dummy lower leg structure
Assignee: ROBERT A DENTON Inc A CORP OF MI
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Filing: 1982-12-08
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Granted: 1984-12-18
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Expires: 2002-12-08
Abstract
Abstract A crash test dummy lower leg structure having a lower leg unit consisting of a tibia member provided with upper and lower tibia sensors. An ankle-foot assembly connected to the lower tibia sensor has a ball and socket connection between the ankle shell and foot member. Means are provided to restrict movement of the ball, to which the foot member is connected, to rotation about three mutually perpendicular axes which intersect at the center of the ball. A knee clevis sensor is connected to the upper tibia sensor and has a pair of spaced parallel members designed to sense and measure force along a line between the knee pivot and the ankle pivot.
Inventors
- 👤 Robert A. Denton
- 👤 Craig R. Morgan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:07
CPC Classifications
G; G09; G09B; G09B23/00; G09B23/28; G09B23/30; G09B23/32
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
88 words
In a crash test dummy lower leg structure, an ankle-foot assembly comprising an ankle shell forming a spherical socket, a ball movably fitted in said socket so as to be capable of rotation about three mutually perpendicular axes which intersect at the center of said ball, a stem projecting from said ball through an opening in said shell for connection to a foot member, and means for precisely controlling and positively restricting the movement of said ball to the aforesaid rotation about said three mutually perpendicular axes only.
Claim 2
Dependent Claim
88 words
In a crash test dummy lower leg structure, an ankle-foot assembly comprising an ankle shell forming a spherical socket, a ball movably fitted in said socket so as to be capable of rotation about three mutually perpendicular axes which intersect at the center of said ball, a stem projecting from said ball through an opening in said shell for connection to a foot member, and means for precisely controlling and positively restricting the movement of said ball to the aforesaid rotation about said three mutually perpendicular axes only.
Claim 3
Dependent Claim
139 words
In a crash test dummy lower leg structure, an ankle-foot assembly comprising an ankle shell forming a spherical socket, a ball movably fitted in said socket, a stem projecting from said ball through an opening in said shell for connection to a foot member, and means restricting the movement of said ball in said socket to rotation about three mutually perpendicular axes which intersect at the center of said ball, said means restricting movement of said ball including a pin movable in an elongated slot in said ball to define the arc of rotation of said ball about one of said axes and also movable in an elongated slot in said shell to define the arc of rotation of said ball about a second of said axes, said pin providing the third axis about which said ball is rotatable.
Claim 4
Dependent Claim
139 words
In a crash test dummy lower leg structure, an ankle-foot assembly comprising an ankle shell forming a spherical socket, a ball movably fitted in said socket, a stem projecting from said ball through an opening in said shell for connection to a foot member, and means restricting the movement of said ball in said socket to rotation about three mutually perpendicular axes which intersect at the center of said ball, said means restricting movement of said ball including a pin movable in an elongated slot in said ball to define the arc of rotation of said ball about one of said axes and also movable in an elongated slot in said shell to define the arc of rotation of said ball about a second of said axes, said pin providing the third axis about which said ball is rotatable.
Claim 5
Dependent Claim
27 words
Structure as defined in claim 2, wherein said pin extends generally horizontally in a front to rear direction when said leg structure is in an upright position.
Claim 6
Dependent Claim
37 words
Structure as defined in claim 3, wherein one of said slots is disposed in a generally vertical plane and the other is disposed in a generally horizontal plane when said leg structure is in an upright position.
Claim 7
Dependent Claim
14 words
Structure as defined in claim 4, wherein said opening in said shell is rectangular.
Claim 8
Dependent Claim
39 words
Structure as defined in claim 5, wherein one pair of opposed sides of said opening are parallel to one of said axes and the remaining pair of opposed sides of said opening are parallel to another of said axes.
Claim 9
Dependent Claim
20 words
Structure as defined in claim 6, wherein means are provided to frictionally retain said ball from moving in said socket.
Claim 10
Dependent Claim
54 words
In a crash test dummy lower leg structure, a lower leg unit including an elongated tibia member, an upper tibia sensor for measuring load forces removably secured to the upper end of said tibia member, and a lower tibia sensor for measuring load forces removably secured to the lower end of said tibia member.
Claim 11
Dependent Claim
54 words
In a crash test dummy lower leg structure, a lower leg unit including an elongated tibia member, an upper tibia sensor for measuring load forces removably secured to the upper end of said tibia member, and a lower tibia sensor for measuring load forces removably secured to the lower end of said tibia member.
Claim 12
Dependent Claim
16 words
Structure as defined in claim 8, including an ankle-foot assembly secured to said lower tibia sensor.
Claim 13
Dependent Claim
16 words
Structure as defined in claim 8, including a knee member secured to said upper tibia sensor.
Claim 14
Dependent Claim
16 words
Structure as defined in claim 10, including an ankle-foot assembly secured to said lower tibia sensor.
Claim 15
Dependent Claim
82 words
In a crash test dummy lower leg structure, a lower leg unit including an elongated tibia member, an upper tibia sensor for measuring load forces removably secured to the upper end of said tibia member, and a lower tibia sensor for measuring load forces removably secured to the lower end of said tibia member, said sensors being capable of being secured to said tibia member in at least two different rotative positions with respect to the longitudinal axis of said tibia member.
Claim 16
Dependent Claim
82 words
In a crash test dummy lower leg structure, a lower leg unit including an elongated tibia member, an upper tibia sensor for measuring load forces removably secured to the upper end of said tibia member, and a lower tibia sensor for measuring load forces removably secured to the lower end of said tibia member, said sensors being capable of being secured to said tibia member in at least two different rotative positions with respect to the longitudinal axis of said tibia member.
Claim 17
Dependent Claim
108 words
In a crash test dummy lower leg structure, a lower leg unit including an elongated tibia member, an upper tibia sensor for measuring load forces removably secured to the upper end of said tibia member, a lower tibia sensor for measuring load forces removably secured to the lower end of said tibia member, and a knee clevis sensor of generally U-shape having a base and two parallel side elements projecting from the ends of said base, said base being secured to said upper tibia sensor, each side element having a portion of reduced cross-section constituting a flexure area to which a strain gage is adapted to be applied.
Claim 18
Dependent Claim
108 words
In a crash test dummy lower leg structure, a lower leg unit including an elongated tibia member, an upper tibia sensor for measuring load forces removably secured to the upper end of said tibia member, a lower tibia sensor for measuring load forces removably secured to the lower end of said tibia member, and a knee clevis sensor of generally U-shape having a base and two parallel side elements projecting from the ends of said base, said base being secured to said upper tibia sensor, each side element having a portion of reduced cross-section constituting a flexure area to which a strain gage is adapted to be applied.
Claim 19
Dependent Claim
16 words
Structure as defined in claim 13, including an ankle-foot assembly secured to said lower tibia sensor.
Claim 20
Dependent Claim
71 words
In a crash test dummy lower leg structure, a lower leg unit, a knee clevis sensor of generally U-shape having a base and two parallel side elements projecting from the ends of said base, and means mounting said base to the upper end of said lower leg unit, each side element having a portion of reduced cross-section constituting a flexure area to which a strain gage is adapted to be applied.
Claim 21
Dependent Claim
71 words
In a crash test dummy lower leg structure, a lower leg unit, a knee clevis sensor of generally U-shape having a base and two parallel side elements projecting from the ends of said base, and means mounting said base to the upper end of said lower leg unit, each side element having a portion of reduced cross-section constituting a flexure area to which a strain gage is adapted to be applied.
References Cited (Backward Citations)
US3196463A
Cited
US3400408A
Cited
US3557471A
Cited
FR2358716A1
Cited
FR2452752A1
Cited
GB2084025A
Cited
US4349339A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-12-18 | 1988-06-18 | 1988-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-18 | 1992-06-18 | 1992-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-18 | 1996-06-18 | 1996-12-18 | $7700.00 | Window Closed / Lapsed |