US3831276A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Convertible swivel knife which illuminates work area
Assignee: Individual
•
Filing: 1973-07-31
•
Granted: 1974-08-27
•
Expires: 1993-07-31
Abstract
Abstract A convertible swivel knife which includes first and second subassemblies. The first sub-assembly comprises a first tubular housing having front and rear ends. A light-transmissive tube is rigidly fitted within the first housing, the tube having exposed edges at both the front and rear ends of the first housing. An elongated generally cylindrical stem is mounted within the tube, the stem being normally rotatable with respect to the tube. The stem has a blade-holding end which protrudes from the front end of the first housing. An adjustable means is provided for rigidly coupling the stem to the inner surface of the tube. The second tubular housing has front and rear ends, the front end of the second housing being removably mounted to the rear end of the second housing being removably mounted to the rear end of the first housing. Light generating means are mounted within the second housing and oriented to project light through the front end of the second housing. In operation, the generated light is transmitted by the light tube to the front end of the first housing to illuminate the areas surrounding the blade-holding end of the stem. Using the adjustable means, the craftsman can lock the stem so that it does not swivel with respect to the housing during applications where a rigid blade is desirable.
Inventors
- 👤 F Umholtz
- 👤 W Dalton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:35
CPC Classifications
B; B26; B26B; B26B11/00; B26B11/008; B26B1/00; B26B1/02; B26B1/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
187 words
An illuminating convertible swivel knife comprising: A. a first sub-assembly including a. a first tubular housing having front and rear ends; b. a light-transmissive pipe rigidly fitted within said first housing, said light pipe having exposed edges at both the front and rear ends of said first housing; c. an elongated generally cylindrical stem mounted within said light pipe, said stem being normally rotatable with respect to said light pipe, said stem having a blade-holding end at the front end of said first housing; and d. adjustable means for rigidly coupling said stem to the inner surface of said light pipe; and B. a second sub-assembly including e. a second tubular housing having front and rear ends, the front end of said second housing being removably mounted to the rear end of said first housing; and f. light generating means mounted within said second housing and oriented to project light through the front end of said second housing; whereby the generated light is transmitted by said lighttransmissive tube to the front end of said first housing to illuminate the area surrounding the blade-holding end of said stem.
Claim 2
Dependent Claim
187 words
An illuminating convertible swivel knife comprising: A. a first sub-assembly including a. a first tubular housing having front and rear ends; b. a light-transmissive pipe rigidly fitted within said first housing, said light pipe having exposed edges at both the front and rear ends of said first housing; c. an elongated generally cylindrical stem mounted within said light pipe, said stem being normally rotatable with respect to said light pipe, said stem having a blade-holding end at the front end of said first housing; and d. adjustable means for rigidly coupling said stem to the inner surface of said light pipe; and B. a second sub-assembly including e. a second tubular housing having front and rear ends, the front end of said second housing being removably mounted to the rear end of said first housing; and f. light generating means mounted within said second housing and oriented to project light through the front end of said second housing; whereby the generated light is transmitted by said lighttransmissive tube to the front end of said first housing to illuminate the area surrounding the blade-holding end of said stem.
Claim 3
Dependent Claim
127 words
The swivel knife in accordance with claim 1 wherein said adjustable means comprises: a lock nut fitted within said light pipe toward the rear end of said housing, said lock nut rotatably receiving the portion of said stem at the rear end of said housing; a hollow screw having outer threading which is received by the inner threading of said lock nut, said screw being proportioned to rotatably receive said stem with a free end of said stem protruding therefrom; and locking means rigidly connected to the free end of said stem, said locking means being operative to bind against the exposed edge of said hollow screw when the latter is unscrewed by a predetermined amount, whereby said stem is rendered rigid with respect to said housing.
Claim 4
Dependent Claim
33 words
The swivel knife in accordance with claim 2 wherein said stem has a widened collar portion within said housing; and further comprising first and second bearings on opposite sides of said collar portion.
Claim 5
Dependent Claim
23 words
The swivel knife in accordance with claim 3 wherein one of said bearings is housed between said collar portion and said lock nut.
Claim 6
Dependent Claim
162 words
A swivel knife that is convertible for use as a conventional knife wherein the blade is rigidly mounted, comprising: a tubular housing having front and rear ends, the rear end of said housing having inner threading; an elongated cylindrical stem mounted within said housing, said stem being normally rotatable with respect to said housing, said stem having a blade-holding end at the front end of said housing and a free end which protrudes from the rear end of said housing; a hollow screw having outer threading which is received by the inner threading of said housing, said screw being proportioned to rotAtably receive said stem so that the free end of said stem protrudes therefrom; and locking means rigidly connected to the free end of said stem, said locking means being operative to bind against the exposed edge of said hollow screw when the latter is unscrewed by a predetermined amount, whereby said stem is rendered rigid with respect to said housing.
Claim 7
Dependent Claim
162 words
A swivel knife that is convertible for use as a conventional knife wherein the blade is rigidly mounted, comprising: a tubular housing having front and rear ends, the rear end of said housing having inner threading; an elongated cylindrical stem mounted within said housing, said stem being normally rotatable with respect to said housing, said stem having a blade-holding end at the front end of said housing and a free end which protrudes from the rear end of said housing; a hollow screw having outer threading which is received by the inner threading of said housing, said screw being proportioned to rotAtably receive said stem so that the free end of said stem protrudes therefrom; and locking means rigidly connected to the free end of said stem, said locking means being operative to bind against the exposed edge of said hollow screw when the latter is unscrewed by a predetermined amount, whereby said stem is rendered rigid with respect to said housing.
Claim 8
Dependent Claim
33 words
The swivel knife in accordance with claim 5 wherein said stem has a widened collar portion within said housing; and further comprising first and second bearings on opposite sides of said collar portion.
Claim 9
Dependent Claim
21 words
The swivel knife in accordance with claim 6 further comprising removable means for covering the exposed protruding end of said stem.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-26 | 1978-02-25 | 1978-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-26 | 1982-02-25 | 1982-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-26 | 1986-02-25 | 1986-08-27 | $7700.00 | Window Closed / Lapsed |