US3709249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protection device for the operating member of a fire hydrant
Assignee: Individual
•
Filing: 1971-02-12
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Granted: 1973-01-09
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Expires: 1991-02-12
Abstract
Abstract The polygonal operating member of a fire hydrant is encircled and concealed by a washer and collar. The collar has a shoulder encircled and concealed by an outer member which rotates on the collar but is axially fixed to the latter. The collar is rotationally and axially fixed to the operating member for the application of torque to the latter. The collar is moreover provided with a flat chordal face exposed between the washer and outer member for engagement by a special wrench. The wrench has two legs cooperatively defining a cylindrical surface with a flat chordal face thereon.
Inventors
- 👤 R Diaz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:00
CPC Classifications
F; F16; F16K; F16K35/00; F16K35/06; Y; Y10; Y10T; Y10T137/00; Y10T137/5327; Y10T137/5456; Y10T137/5468; Y10T137/6851; Y10T137/7043; Y10T137/7062; Y10T137/7065
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
105 words
A protection device for apparatus including a body and polygonal operating member protruding from said body, said protection device comprising a collar for encircling and being rotationally and axially fixed relative to said operating member, said collar concealing said operating member and including a shoulder portion remote from said body and a generally cylindrical portion adjacent the body, said generally cylindrical portion having a limited engagement surface for the transfer of torque to said collar and thereby to said operating member, and means engaging said shoulder and rotatable on said collar and concealing the latter with the exception of said cylindrical portion and engagement surface.
Claim 2
Dependent Claim
105 words
A protection device for apparatus including a body and polygonal operating member protruding from said body, said protection device comprising a collar for encircling and being rotationally and axially fixed relative to said operating member, said collar concealing said operating member and including a shoulder portion remote from said body and a generally cylindrical portion adjacent the body, said generally cylindrical portion having a limited engagement surface for the transfer of torque to said collar and thereby to said operating member, and means engaging said shoulder and rotatable on said collar and concealing the latter with the exception of said cylindrical portion and engagement surface.
Claim 3
Dependent Claim
16 words
A protection device as claimed in claim 1, wherein said surface is a flat chordal face.
Claim 4
Dependent Claim
27 words
A protection device as claimed in claim 2 comprising a washer between said collar engagement surface and body, the washer having a larger diameter than said collar.
Claim 5
Dependent Claim
52 words
A protection device as claimed in claim 2, wherein said means includes a dome, a skirt depending from said dome, and a ring threadably engaged in said skirt and locking said shoulder portion against relative axial movement in the skirt, said ring having at least one axially disposed opening facing said body.
Claim 6
Dependent Claim
20 words
A protection device as claimed in claim 2, wherein said face subtends an angle of less than about 75* .
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) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |