US3855700A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blade scraper
Assignee: GERSON CO Inc L
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Filing: 1974-04-19
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Granted: 1974-12-24
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Expires: 1994-04-19
Abstract
Abstract A blade scraper has a hand grip casing with a slide mounted in a chamber of the casing for holding a razor blade and permitting retraction of the razor blade into an inoperative position and sliding movement to an operative position with the blade in a scraping position exposed outside of the chamber. A pressure sensitive locking button acts to lock the blade in the inoperative position or the exposed position and has wedging means for tightly holding the blade in the operative position when a scraping force is applied. Preferably a safety button is interconnected with the slide so that pressure must be applied to two actuating buttons in order to expose the blade thus making it difficult for small children to accidentally place the scraper in a mode of operation dangerous for handling.
Inventors
- 👤 R Gerson
- 👤 L Caprio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:05
CPC Classifications
B; B44; B44D; B44D3/00; B44D3/16; B44D3/162; B44D3/164
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
191 words
A blade scraper comprising, a hand gripping casing, a slide mounted in said casing and having means for mounting and carrying a scraping blade having a cutting edge, said casing defining a chamber with first and second opposed slide surfaces and an oPening to the outside of said casing, said slide having resilient first and second spring legs biased into engagement with said surfaces respectively, pressure actuated locking means for locking said slide in a first retracted position with a scraper blade carried therein wholly within said chamber and a second operative position with said cutting edge exposed through said opening, said locking means comprising first and second cutouts defined by said casing and a pressure button means constructed and arranged to be urged into said first cutout in said retracted position and said second cutout in said operative position whereby said button can be actuated by finger pressure from outside said casing to release said locking means, said second cutout and said button means defining complementary surfaces for engagement to cause wedge locking of said slide in said second position upon application of a scraping force to said cutting edge.
Claim 2
Dependent Claim
191 words
A blade scraper comprising, a hand gripping casing, a slide mounted in said casing and having means for mounting and carrying a scraping blade having a cutting edge, said casing defining a chamber with first and second opposed slide surfaces and an oPening to the outside of said casing, said slide having resilient first and second spring legs biased into engagement with said surfaces respectively, pressure actuated locking means for locking said slide in a first retracted position with a scraper blade carried therein wholly within said chamber and a second operative position with said cutting edge exposed through said opening, said locking means comprising first and second cutouts defined by said casing and a pressure button means constructed and arranged to be urged into said first cutout in said retracted position and said second cutout in said operative position whereby said button can be actuated by finger pressure from outside said casing to release said locking means, said second cutout and said button means defining complementary surfaces for engagement to cause wedge locking of said slide in said second position upon application of a scraping force to said cutting edge.
Claim 3
Dependent Claim
21 words
A blade scraper in accordance with claim 1 and further comprising said hand gripping casing defining a hinged blade storage compartment.
Claim 4
Dependent Claim
34 words
A blade scraper in accordance with claim 1 and further comprising said slide means for mounting and carrying said scraping blade, mounting said scraping blade in a plane for reciprocal sliding in said plane.
Claim 5
Dependent Claim
42 words
A blade scraper in accordance with claim 3 and further comprising said complementary surfaces being arranged at an angle to said plane, said surfaces being carried by said second cutout and a pair of nibs extending outwardly from said locking button means.
Claim 6
Dependent Claim
28 words
A blade scraper in accordance with claim 4 and further comprising a pressure activating safety button for providing a double lock for said slide in said first position.
Claim 7
Dependent Claim
37 words
A blade scraper in accordance with claim 5 and further comprising said safety button being mounted on a tab of said first leg with a cutout portion defined by said second leg opposed to said safety button.
Claim 8
Dependent Claim
58 words
A blade scraper in accordance with claim 6 and further comprising, said first and second cutouts being interconnected by a slot defined by a wall of said casing with said slot having a forward end defining a third position of said slide with said slide exposed through said opening for permitting lateral mounting of a razor blade thereon.
Claim 9
Dependent Claim
136 words
A razor blade scraper comprising, a hand gripping casing, a slide carrying means for mounting and carrying a scraping blade, said slide being mounted in a chamber defined by said casing with said chamber defining an opening at an end of said casing, pressure activated locking means for locking said slide and blade in a first retracted position with said blade wholly within and encased by said chamber and a second position with said blade moved through said opening and exposed out of said chamber in an operative scraping position, and pressure actuated safety means providing a safety lock to hold said slide and blade in said first position while permitting release of said slide upon pressure actuation thereof whereby pressure must be applied to said safety means and said locking means to expose said blade.
Claim 10
Dependent Claim
136 words
A razor blade scraper comprising, a hand gripping casing, a slide carrying means for mounting and carrying a scraping blade, said slide being mounted in a chamber defined by said casing with said chamber defining an opening at an end of said casing, pressure activated locking means for locking said slide and blade in a first retracted position with said blade wholly within and encased by said chamber and a second position with said blade moved through said opening and exposed out of said chamber in an operative scraping position, and pressure actuated safety means providing a safety lock to hold said slide and blade in said first position while permitting release of said slide upon pressure actuation thereof whereby pressure must be applied to said safety means and said locking means to expose said blade.
Claim 11
Dependent Claim
27 words
A razor blade scraper in accordance with claim 8 wherein said safety means and said locking means are positioned on opposed sides of said hand gripping casing.
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) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |