Patent US3673672A successfully refreshed from Google Patents.
US3673672A
Expired / Lapsed
US
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Method of joining two bodies in captive, independently rotatable assembly
Assignee: American Safety Razor Co
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Filing: 1969-11-26
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Granted: 1972-07-04
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Expires: 1989-11-26
Abstract
Abstract A safety razor of the clam shell type in which certain of the several components of the razor are of improved construction lending to reduction in manufacturing and assembling costs of the razor. Thus, spider bar movement for controlling the opening and closing of the cap members is effected by rotating a control knob connected to the bottom of a grip member in captive but independently rotatable movement therewith, the control knob being internally threaded for receiving the threaded lower end of a spindle which is fixedly connected at its upper end with the spider bar, the captive assembly of the control knob with the grip member being effected by plastically deforming a projecting part on the control knob in a n undercut groove in the grip member without allowing any adhesion between the two to occur. The spider bar also has a stem which is provided with a pair of lateral shoulders, at least one of which is adapted to abut on the underside of the razor bridge member when the spider bar is raised up to open the cap member thereby providing an upstop means to limit the degree of cap member opening and also to preclude accidental disengagement of the spindle from the control knob.
Inventors
- 👤 Clemens A Iten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:42
CPC Classifications
B; B26; B26B; B26B21/00; B26B21/08; B26B21/14; B26B21/30; B26B21/32; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/4984; Y10T29/49845; Y10T29/49858; Y10T29/49908; Y10T29/49915; Y10T29/49917; Y10T29/49918; Y10T29/4992; Y10T29/49938
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
241 words
A method for joining two bodies in captive, independenTly rotatable assembly, one of said bodies having a circumambient laterally projecting anchorage means, the other of said bodies having projecting means at least a portion of which is telescopically interfittable with said anchorage means and being made of a material which is not susceptible to shape deformation at ambient temperatures but amenable to plastic deformation at elevated temperatures, with one of said bodies being capable of being spun relative to the other with opposed surface contact between said projecting means and surfaces provided by the other of said bodies to develop sufficient heat to render portions of said projecting means plastic for flow against said anchorage means, said method comprising telescopically interfitting said portion of said projecting means with said anchorage means, spinning one of said bodies relative to the other while simultaneously applying force in the direction of the axis of spin to said bodies to maintain surface contact between said projecting means and said opposed surfaces provided by said other body thereby to generate sufficient frictionally induced localized heating in said projecting means to render it plastic for flow against and into said anchorage means under the impetus of said axially applied force, then terminating the application of force to said bodies while continuing to spin said one body until the projecting means rendered plastic rigidifies within said anchorage means whereby non-adherent captive connection of said two bodies is produced.
Claim 2
Independent Claim
241 words
A method for joining two bodies in captive, independenTly rotatable assembly, one of said bodies having a circumambient laterally projecting anchorage means, the other of said bodies having projecting means at least a portion of which is telescopically interfittable with said anchorage means and being made of a material which is not susceptible to shape deformation at ambient temperatures but amenable to plastic deformation at elevated temperatures, with one of said bodies being capable of being spun relative to the other with opposed surface contact between said projecting means and surfaces provided by the other of said bodies to develop sufficient heat to render portions of said projecting means plastic for flow against said anchorage means, said method comprising telescopically interfitting said portion of said projecting means with said anchorage means, spinning one of said bodies relative to the other while simultaneously applying force in the direction of the axis of spin to said bodies to maintain surface contact between said projecting means and said opposed surfaces provided by said other body thereby to generate sufficient frictionally induced localized heating in said projecting means to render it plastic for flow against and into said anchorage means under the impetus of said axially applied force, then terminating the application of force to said bodies while continuing to spin said one body until the projecting means rendered plastic rigidifies within said anchorage means whereby non-adherent captive connection of said two bodies is produced.
Claim 3
Dependent Claim
36 words
The method of claim 1 further comprising applying lubricant to said anchorage means at least during the time said one body is being spun and force is applied in the direction of the axis of spin.
Claim 4
Dependent Claim
57 words
The method of claim 1 wherein one of said bodies is held stationary, and the other is rotated, the force applied to maintain opposed surface contact between said projecting means and said anchorage means being applied to said other body along a line of action coincident with the axis about which said other body is being rotated.
Claim 5
Dependent Claim
34 words
The method of claim 1 wherein at least a portion of said projecting means is heated to a temperature just below its plastic state temperature prior to telescopically interfitting it with said anchorage means.
Claim 6
Dependent Claim
26 words
The method of claim 1 wherein the anchorage means in said one body is a groove tapering inwardly in said one body from a surface thereof.
Claim 7
Dependent Claim
24 words
The method of claim 5 wherein said groove is provided with an inclined surface against which said projecting means deforms when in plastic state.
Claim 8
Dependent Claim
33 words
The method of claim 1 wherein said anchorage means has a volume substantially equal to that of said projecting means whereby upon being rendered plastic said projecting means completely invests said anchorage means.
Claim 9
Dependent Claim
51 words
The method of claim 1 wherein the circumambient laterally projecting means on said one body is a groove extending inwardly from a face of said one body, the lateral expanse of said groove at a location remote from said face being substantially different from that of said groove at said face.
Claim 10
Dependent Claim
22 words
The method of claim 8 wherein said groove extends inwardly in said one body from an annular opening formed in said face.
Claim 11
Dependent Claim
26 words
The method of claim 9 wherein the projecting means on said other body is an annular skirt projecting outwardly of a face of said other body.
Claim 12
Dependent Claim
57 words
The method of claim 1 wherein the circumambient laterally projecting means on said one body is a bored passage extending inwardly from a face of said one body, said passage having greater lateral expanse at a location remote from said face than at said face, said projecting means on the said other body being a cylindrical boss.
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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) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |