US3814942A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Human head restraint system
Assignee: Simmonds Precision Products Inc
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Filing: 1972-11-10
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Granted: 1974-06-04
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Expires: 1992-11-10
Abstract
Abstract A human head restraint system for positively restraining the human head in a predetermined position utilizing eccentrically pivoted cams on either side of the predetermined position for engaging various sizes of human heads. The active area of the cam profiles are non-circularly shaped for insuring that the area of actual contact with most human head sizes is close to a line passing through the cam pivot points thus minimizing the effective lever arm available to the restrained head for effecting movement of the restraining cams from the predetermined position.
Inventors
- 👤 S Darden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:21
CPC Classifications
A; A61; A61B; A61B3/00; A61B3/0083; A61F; A61F5/00; A61F5/37; A61F5/3707
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
100 words
Apparatus for restraining a human head in a predetermined position, said apparatus comprising: a axis disposed on either side of said predetermined position, and a cam eccentrically pivoted about each of said axes, said cams having a non-circular profile for engaging a predetermined range of head sizes at contact points within a 20* arc from a line connecting the two axes, and wherein the non-circular profile of each of said cams has a rise (increase of radius from its axis per degree of arc) to radius ratio which is less than 10 2 and a minimum radius exceeding one inch.
Claim 2
Dependent Claim
100 words
Apparatus for restraining a human head in a predetermined position, said apparatus comprising: a axis disposed on either side of said predetermined position, and a cam eccentrically pivoted about each of said axes, said cams having a non-circular profile for engaging a predetermined range of head sizes at contact points within a 20* arc from a line connecting the two axes, and wherein the non-circular profile of each of said cams has a rise (increase of radius from its axis per degree of arc) to radius ratio which is less than 10 2 and a minimum radius exceeding one inch.
Claim 3
Dependent Claim
36 words
Apparatus as in claim 1 further comprising means for spring biasing each of said cams to rotate in a direction causing engagement of the cam profile with a human head when disposed in said predetermined position.
Claim 4
Dependent Claim
21 words
Apparatus as in claim 2 further comprising means for damping cam rotation opposite to the said direction of spring biased rotation.
Claim 5
Dependent Claim
17 words
Apparatus as in claim 1 further comprising a chin rest disposed below and between said pivotal axes.
References Cited (Backward Citations)
US2973029A
Cited
US3594072A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-03 | 1977-12-03 | 1978-06-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-03 | 1981-12-03 | 1982-06-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-03 | 1985-12-03 | 1986-06-04 | $7700.00 | Window Closed / Lapsed |