US4577526A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protective element for hand-held power tool
Assignee: Robert Bosch GmbH
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Filing: 1984-03-05
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Granted: 1986-03-25
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Expires: 2004-03-05
Abstract
Abstract A protective element for a hand-held power tool with a rotary tool, such as a grinding disk, a circular saw, or the like, has a protective member with cut-outs having increased portions, an additional member connectable with the protective member, and connecting elements for connecting the additional member to the protective member and including a plurality of holding screws having heads extending through the increased portions of the cut-outs and engageable behind the protective member, wherein the increased portions have the shape of the plan view of the screw heads and are provided at the same end of the elongated cut-outs, and a locking projection is provided near at least one increased portion in the path of the screw head of the screw sliding in the respective cut-outs.
Inventors
- 👤 Manfred Stabler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 23:50
CPC Classifications
F; F16; F16P; F16P1/00; F16P1/02; B; B27; B27B; B27B9/00; B27B9/02; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32606; Y10T403/32819; Y10T403/32827; Y10T403/75; Y10T74/00; Y10T74/21; Y10T74/219; Y10T74/2191
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
265 words
A protective element for a hand-held power tool with a rotary tool, such as a grinding disk, a circular saw, or the like, comprising a protective member provided with a plurality of elongated cut-outs each having two ends spaced from one another in the direction of elongation and provided in one of said ends with an increased portion; an additional member connectable with said protective member; and means for connecting said additional member with said protecting member, said connecting means including a plurality of holding screws having heads arranged to be inserted from outside through said increased portions and engage behind said protective member, said increased portions of said cut-outs having a shape on a plan view which corresponds to the shape of said heads of said screws and being provided at the same ends of said cut-outs in said protective member, and at least one locking projection, which projects outwardly beyond said protective member and is arranged near at least one of said increased portions in a path of an associated one of said heads sliding on said protective member in a respective one of said cut-outs from said one end to said other end of each of said cut-outs and vice versa so that when the head of one of said holding screws is inserted through the increased portion of respective one of said cut-outs said head is located at one side of said locking projection, and after said head has been slid to the other end of the same cut-out said head is located at the other side of said locking projection.
Claim 2
Dependent Claim
265 words
A protective element for a hand-held power tool with a rotary tool, such as a grinding disk, a circular saw, or the like, comprising a protective member provided with a plurality of elongated cut-outs each having two ends spaced from one another in the direction of elongation and provided in one of said ends with an increased portion; an additional member connectable with said protective member; and means for connecting said additional member with said protecting member, said connecting means including a plurality of holding screws having heads arranged to be inserted from outside through said increased portions and engage behind said protective member, said increased portions of said cut-outs having a shape on a plan view which corresponds to the shape of said heads of said screws and being provided at the same ends of said cut-outs in said protective member, and at least one locking projection, which projects outwardly beyond said protective member and is arranged near at least one of said increased portions in a path of an associated one of said heads sliding on said protective member in a respective one of said cut-outs from said one end to said other end of each of said cut-outs and vice versa so that when the head of one of said holding screws is inserted through the increased portion of respective one of said cut-outs said head is located at one side of said locking projection, and after said head has been slid to the other end of the same cut-out said head is located at the other side of said locking projection.
Claim 3
Dependent Claim
21 words
A protective element as defined in claim 1, wherein said additional member is a guide carriage connectable with said protective member.
Claim 4
Dependent Claim
27 words
A protective element as defined in claim 1, wherein said protective member has a wall, said locking projection extends outwardly beyond said wall of said protective member.
Claim 5
Dependent Claim
58 words
A protective element as defined in claim 1, wherein each of said holding screws has a shaft; and further comprising a plurality of wing nuts each screwed on respective one of said holding screws, and a plurality of axially acting pressure springs each arranged between said shaft and said wing nut of a respective one of said screws.
Claim 6
Dependent Claim
19 words
A protective element as defined in claim 4, wherein said axially acting pressure springs are formed as helical springs.
Claim 7
Dependent Claim
42 words
A protective element as defined in claim 4; and further comprising a plurality of pairs of washers, the washers of each of said pairs being arranged on said shaft of each of said holding screws at both sides of said pressure spring.
Claim 8
Dependent Claim
71 words
A protective element as defined in claim 1, wherein said additional member is provided with at least two holders each having a longitudinal slot, said slots being spaced from one another and having a predetermined center distance therebetween, said increased portions of said cut-outs being spaced from one another and having a center distance therebetween corresponding to the center distance between said longitudinal slots of said holders of said additional member.
Claim 9
Dependent Claim
30 words
A protective element as defined in claim 1, wherein said cut-outs are elongated so as to allow also a pivotal movement of said protective member relative to said additional member.
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) | 1989-03-24 | 1989-09-23 | 1990-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-24 | 1993-09-23 | 1994-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-24 | 1997-09-23 | 1998-03-25 | $7700.00 | Window Closed / Lapsed |