US4924635A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable grinder with adjustable protective hood
Assignee: C & E FEIN & Co A CORP OF W GERMANY GmbH
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Filing: 1988-12-16
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Granted: 1990-05-15
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Expires: 2008-12-16
Abstract
Abstract In a portable machine tool comprising a protective hood mounted by means of a holding part for rotation on a clamping neck of the portable machine tool, in order to prevent unintentional adjustment of the protective hood, it is proposed that the holding part of the protective hood and a locking part facing the holding part and held in a rotationally fixed manner on a grinder housing in the region of the clamping neck be provided with locking elements which can be brought into engagement with one another, that the holding part or locking part comprise at least one locking element and the respective other part several locking elements, and that the locking elements be disengageable against the force of a spring member.
Inventors
- 👤 Boris Rudolf
- 👤 Walter Blutharsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:02
CPC Classifications
B; B24; B24B; B24B55/00; B24B55/04; B24B55/05; B24B55/052
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
152 words
Portable machine tool, comprising: a grinder housing having a clamping neck, a protective hood mounted by means of a holding part for rotation on said clamping neck of said portable machine tool, a locking part facing said holding part and held in a rotationally fixed manner on said grinder housing, said holding part of said protective hood and said locking part being provided with locking elements, said holding part or said locking part comprising at least one first locking element and said respective other part several second locking elements, said first locking element being able to be brought into positive engagement with every one of said second locking elements, each engagement of said first locking element with one of said second locking elements fixing said protective hood in one definite position relative to said grinder housing and said locking elements being designed to be disengaged against the force of a spring member.
Claim 2
Dependent Claim
152 words
Portable machine tool, comprising: a grinder housing having a clamping neck, a protective hood mounted by means of a holding part for rotation on said clamping neck of said portable machine tool, a locking part facing said holding part and held in a rotationally fixed manner on said grinder housing, said holding part of said protective hood and said locking part being provided with locking elements, said holding part or said locking part comprising at least one first locking element and said respective other part several second locking elements, said first locking element being able to be brought into positive engagement with every one of said second locking elements, each engagement of said first locking element with one of said second locking elements fixing said protective hood in one definite position relative to said grinder housing and said locking elements being designed to be disengaged against the force of a spring member.
Claim 3
Dependent Claim
30 words
Portable machine tool as defined in claim 1, characterized in that said locking elements are detent recesses provided on one part and a detent member provided on the other part.
Claim 4
Dependent Claim
20 words
Portable machine tool as defined in claim 2, characterized in that one detent member and several detent recesses are provided.
Claim 5
Dependent Claim
48 words
Portable machine tool as defined in claim 1, characterized in that said locking elements are stationarily arranged on said holding part and said locking part, and in that said holding part and said locking part are tiltable relative to one another against the force of said spring member.
Claim 6
Dependent Claim
25 words
Portable machine tool as defined in claim 1, characterized in that said holding part is in the form of a ring surrounding said clamping neck.
Claim 7
Dependent Claim
21 words
Portable machine tool as defined in claim 5, characterized in that said holding part is integrally formed on said protective hood.
Claim 8
Dependent Claim
21 words
Portable machine tool as defined in claim 1, characterized in that said locking part is a ring enclosing said clamping neck.
Claim 9
Dependent Claim
22 words
Portable machine tool as defined in claim 1, characterized in that said locking part is tiltably arranged relative to said clamping neck.
Claim 10
Dependent Claim
25 words
Portable machine tool as defined in claim 1, characterized in that said holding part and the locking part are tiltably arranged relative to each other.
Claim 11
Dependent Claim
17 words
Portable machine tool as defined in claim 1, characterized in that said locking part comprises a lever.
Claim 12
Dependent Claim
22 words
Portable machine tool as defined in claim 10, characterized in that said lever extends between said protective hood and said grinder housing.
Claim 13
Dependent Claim
19 words
Portable machine tool as defined in claim 1, characterized in that said locking part is made of resilient material.
Claim 14
Dependent Claim
22 words
Portable machine tool as defined in claim 1, characterized in that said spring member is a ring-shaped element enclosing said clamping neck.
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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) | 1993-05-14 | 1993-11-13 | 1994-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-14 | 1997-11-13 | 1998-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-14 | 2001-11-13 | 2002-05-15 | $7700.00 | Window Closed / Lapsed |