US3703036A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separable connection means for reciprocating saw blades
Assignee: Individual
•
Filing: 1971-05-03
•
Granted: 1972-11-21
•
Expires: 1991-05-03
Abstract
Abstract A separable connection between the end of a saw blade and the slide that reciprocates it, the connection including a shoulder screw that tightens two clamp members, one on each side of said blade, one of said members being an integral part of the slide, the shoulder of said screw fitting the enclosed circular portion of a notch in said blade end when the latter is clamped, and said notch having a reduced leadin portion extending from the hole in the blade through the adjacent end of the blade, thereby allowing the blade to be slipped out from between said clamp members when the screw is retracted sufficiently to withdraw the shoulder from the hole, while the screw and the two clamp members remain loosely attached to the slide so a replacement saw may be secured to the slide with easy facility.
Inventors
- 👤 Ralph Karubian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:05
CPC Classifications
B; B26; B26B; B26B7/00; B23; B23D; B23D51/00; B23D51/08; B23D51/10; Y; Y10; Y10T; Y10T83/00; Y10T83/929; Y10T83/9457; Y10T83/9473; Y10T83/9481
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
241 words
Separable means for connecting an end of a saw blade to a reciprocating member, said means comprising: a pair of clamp members, one of which is a fixed part of the reciprocating member, one clamp member having a tapped hole and the other a diametrally larger hole, a screw to fasten said clamp members together with said end of the saw blade between them, said screw having a head, a cylindrical shoulder part inward of said head of a size to rotationally fit the larger hole of one of said clamp members, and a threaded stem extending from said shoulder to fit the tapped hole of the other clamp member, and said end of the saw blade being provided with an open-ended notch, the inner end of which has a circular portion of the size of the mentioned larger hole, and the open end of which is large enough to pass the stem of the screw, said end of the saw blade, when clamped between the clamp members with the shoulder part of the screw extending into the circular portion of the open-end notch, being securely connected to the reciprocating member, and said saw blade, when the screw is backed off sufficiently to withdraw its shoulder part from the circular portion of the notch, releasing the blade for endwise removal from its connection to the reciprocating member while the screw stem retains operative engagement with the member having the tapped hole.
Claim 2
Dependent Claim
241 words
Separable means for connecting an end of a saw blade to a reciprocating member, said means comprising: a pair of clamp members, one of which is a fixed part of the reciprocating member, one clamp member having a tapped hole and the other a diametrally larger hole, a screw to fasten said clamp members together with said end of the saw blade between them, said screw having a head, a cylindrical shoulder part inward of said head of a size to rotationally fit the larger hole of one of said clamp members, and a threaded stem extending from said shoulder to fit the tapped hole of the other clamp member, and said end of the saw blade being provided with an open-ended notch, the inner end of which has a circular portion of the size of the mentioned larger hole, and the open end of which is large enough to pass the stem of the screw, said end of the saw blade, when clamped between the clamp members with the shoulder part of the screw extending into the circular portion of the open-end notch, being securely connected to the reciprocating member, and said saw blade, when the screw is backed off sufficiently to withdraw its shoulder part from the circular portion of the notch, releasing the blade for endwise removal from its connection to the reciprocating member while the screw stem retains operative engagement with the member having the tapped hole.
Claim 3
Dependent Claim
241 words
Separable means for connecting an end of a saw blade to a reciprocating member, said means comprising: a pair of clamp members, one of which is a fixed part of the reciprocating member, one clamp member having a tapped hole and the other a diametrally larger hole, a screw to fasten said clamp members together with said end of the saw blade between them, said screw having a head, a cylindrical shoulder part inward of said head of a size to rotationally fit the larger hole of one of said clamp members, and a threaded stem extending from said shoulder to fit the tapped hole of the other clamp member, and said end of the saw blade being provided with an open-ended notch, the inner end of which has a circular portion of the size of the mentioned larger hole, and the open end of which is large enough to pass the stem of the screw, said end of the saw blade, when clamped between the clamp members with the shoulder part of the screw extending into the circular portion of the open-end notch, being securely connected to the reciprocating member, and said saw blade, when the screw is backed off sufficiently to withdraw its shoulder part from the circular portion of the notch, releasing the blade for endwise removal from its connection to the reciprocating member while the screw stem retains operative engagement with the member having the tapped hole.
Claim 4
Dependent Claim
241 words
Separable means for connecting an end of a saw blade to a reciprocating member, said means comprising: a pair of clamp members, one of which is a fixed part of the reciprocating member, one clamp member having a tapped hole and the other a diametrally larger hole, a screw to fasten said clamp members together with said end of the saw blade between them, said screw having a head, a cylindrical shoulder part inward of said head of a size to rotationally fit the larger hole of one of said clamp members, and a threaded stem extending from said shoulder to fit the tapped hole of the other clamp member, and said end of the saw blade being provided with an open-ended notch, the inner end of which has a circular portion of the size of the mentioned larger hole, and the open end of which is large enough to pass the stem of the screw, said end of the saw blade, when clamped between the clamp members with the shoulder part of the screw extending into the circular portion of the open-end notch, being securely connected to the reciprocating member, and said saw blade, when the screw is backed off sufficiently to withdraw its shoulder part from the circular portion of the notch, releasing the blade for endwise removal from its connection to the reciprocating member while the screw stem retains operative engagement with the member having the tapped hole.
Claim 5
Dependent Claim
25 words
Separable means according to claim 1 in which the smaller open end of the notch is defined between outwardly flaring edges that define a leadin.
Claim 6
Dependent Claim
39 words
Separable means according to claim 1 in which one of the clamp members is provided with at least one flange that extends in a direction to have overlapping and non-rotational engagement with an edge of the other clamp member.
Claim 7
Dependent Claim
31 words
Separable means according to claim 3 in which the mentioned end of the saw blade is reduced at least at one edge to be in underlapped engagement with the mentioned flange.
Claim 8
Dependent Claim
50 words
A saw blade and the like having in one end thereof: an open-end notch, the inner end of said notch being circular, and the portion of the notch between the circular end of the blade being constricted in size relative to the size of the circular end of the notch.
Claim 9
Dependent Claim
50 words
A saw blade and the like having in one end thereof: an open-end notch, the inner end of said notch being circular, and the portion of the notch between the circular end of the blade being constricted in size relative to the size of the circular end of the notch.
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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) | 1975-11-21 | 1976-05-22 | 1976-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-21 | 1980-05-22 | 1980-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-21 | 1984-05-22 | 1984-11-21 | $7700.00 | Window Closed / Lapsed |